CN115224929A - Harmonic filtering circuit and motor control equipment - Google Patents
Harmonic filtering circuit and motor control equipmentDownload PDFInfo
- Publication number
- CN115224929A CN115224929ACN202210715991.6ACN202210715991ACN115224929ACN 115224929 ACN115224929 ACN 115224929ACN 202210715991 ACN202210715991 ACN 202210715991ACN 115224929 ACN115224929 ACN 115224929A
- Authority
- CN
- China
- Prior art keywords
- filtering
- signal
- circuit
- module
- harmonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from AC input or output
- H02M1/126—Arrangements for reducing harmonics from AC input or output using passive filters
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
- H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
- H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inverter Devices (AREA)
Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及谐波滤除电路技术领域，尤其涉及一种谐波滤除电路及电机控制设备。The invention relates to the technical field of harmonic filtering circuits, in particular to a harmonic filtering circuit and motor control equipment.
背景技术Background technique
目前，电机控制设备主要由整流模块、逆变模块、滤波电路、驱动电路等电路组成。其中，逆变模块用于将直流信号变换为所要求频率的交流信号，以实现变频的目的。At present, motor control equipment is mainly composed of rectifier module, inverter module, filter circuit, drive circuit and other circuits. Among them, the inverter module is used to convert the DC signal into the AC signal of the required frequency to achieve the purpose of frequency conversion.
然而，相关技术中，电机控制设备在进行逆变的过程中会产生大量的高频谐波，这些高频谐波会导致电机控制设备出现电磁干扰的问题。However, in the related art, a large amount of high-frequency harmonics will be generated by the motor control device during the inverter process, and these high-frequency harmonics will cause the problem of electromagnetic interference in the motor control device.
发明内容SUMMARY OF THE INVENTION
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明提出一种谐波滤除电路及电机控制设备，能够有效滤除逆变过程中产生的高频谐波，从而减少电磁干扰。The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a harmonic filtering circuit and a motor control device, which can effectively filter out high-frequency harmonics generated in the inverter process, thereby reducing electromagnetic interference.
第一方面，本申请提供了一种谐波滤除电路，所述谐波滤除电路应用于电机控制设备，所述电机控制设备包括变频器或伺服驱动器，所述谐波滤除电路用于滤除电机控制设备中的谐波信号；所述谐波滤除电路用于与信号生成电路连接；其中，所述信号生成电路用于生成脉宽调制信号，所述谐波滤除电路还用于根据所述脉宽调制信号生成目标滤波信号，所述谐波滤除电路包括：第一滤波模块，所述第一滤波模块与所述信号生成电路连接，所述第一滤波模块用于对所述脉宽调制信号进行调制、滤波操作，以生成正弦波信号；第二滤波模块，所述第二滤波模块分别与所述第一滤波模块、所述信号生成电路连接，所述第二滤波模块用于对所述正弦波信号进行高频滤波操作，以生成初始滤波信号；第三滤波模块，所述第三滤波模块与所述第二滤波模块连接，所述第二滤波模块用于对所述初始滤波信号进行滤波操作，以生成所述目标滤波信号。In a first aspect, the present application provides a harmonic filter circuit, the harmonic filter circuit is applied to a motor control device, the motor control device includes a frequency converter or a servo driver, and the harmonic filter circuit is used for Filter out the harmonic signal in the motor control device; the harmonic filtering circuit is used for connecting with the signal generating circuit; wherein, the signal generating circuit is used for generating the pulse width modulation signal, and the harmonic filtering circuit also uses In order to generate a target filtering signal according to the pulse width modulation signal, the harmonic filtering circuit includes: a first filtering module, the first filtering module is connected to the signal generating circuit, and the first filtering module is used for The pulse width modulation signal is modulated and filtered to generate a sine wave signal; a second filter module, the second filter module is respectively connected with the first filter module and the signal generation circuit, the second filter module The module is used to perform a high-frequency filtering operation on the sine wave signal to generate an initial filtering signal; a third filtering module, the third filtering module is connected with the second filtering module, and the second filtering module is used for filtering. The initial filtered signal is subjected to a filtering operation to generate the target filtered signal.
本实施例中谐波滤除电路通过设置第一滤波模块，以生成相应的正弦波信号，并通过第二滤波模块对正弦波信号的部分高频谐波进行滤除，以生成相应的初始滤波信号，最终通过第三滤波模块对初始滤波信号的高频谐波进行滤波，并且对低频段的初始滤波信号进行增益，以生成相应的目标滤波信号。本实施例的谐波滤除电路结构简单，易于实现，且能够对脉宽调制信号实现波形调制和较好的高频谐波滤除，从而减少电磁干扰。In this embodiment, the harmonic filtering circuit sets a first filtering module to generate a corresponding sine wave signal, and uses a second filtering module to filter out some high-frequency harmonics of the sine wave signal to generate a corresponding initial filter Finally, the third filtering module filters the high-frequency harmonics of the initial filtering signal, and gains the initial filtering signal in the low frequency band to generate the corresponding target filtering signal. The harmonic filtering circuit of this embodiment has a simple structure and is easy to implement, and can realize waveform modulation and better filtering of high-frequency harmonics for the pulse width modulation signal, thereby reducing electromagnetic interference.
在一些实施例中，所述第三滤波模块还与所述信号生成电路连接，所述第三滤波模块还用于根据所述初始滤波信号生成反馈信号；其中，所述信号生成电路用于根据所述反馈信号更新所述脉宽调制信号。In some embodiments, the third filtering module is further connected to the signal generating circuit, and the third filtering module is further configured to generate a feedback signal according to the initial filtering signal; wherein the signal generating circuit is configured to generate a feedback signal according to The feedback signal updates the pulse width modulated signal.
在一些实施例中，所述信号生成电路为三相输出电路，所述第一滤波模块包括：第一电感组，所述第一电感组的一端与所述信号生成电路连接，所述第一电感组包括N个第一共模电感，一个所述第一共模电感与所述信号生成电路的一相输出连接；其中，N为正整数；第二电感组，所述第二电感组的一端与所述第一电感组的另一端连接，所述第二电感组包括N个第二共模电感，一个所述第二共模电感与一个所述第一共模电感连接。In some embodiments, the signal generating circuit is a three-phase output circuit, the first filtering module includes: a first inductance group, one end of the first inductance group is connected to the signal generating circuit, and the first inductance group is connected to the signal generating circuit. The inductance group includes N first common mode inductances, and one of the first common mode inductances is connected to a phase output of the signal generating circuit; wherein, N is a positive integer; One end is connected to the other end of the first inductor group, the second inductor group includes N second common mode inductors, and one second common mode inductor is connected to one first common mode inductor.
在一些实施例中，所述第二滤波模块包括：一个第一磁珠，所述第一磁珠的一端与所述信号生成电路的接地端连接；N个第二磁珠，一个所述第二磁珠与一个所述第二共模电感连接。In some embodiments, the second filter module includes: a first magnetic bead, one end of the first magnetic bead is connected to the ground end of the signal generating circuit; N second magnetic beads, one of the first magnetic beads Two magnetic beads are connected to one of the second common mode inductors.
在一些实施例中，所述第三滤波模块包括：N个子滤波模块，一个所述子滤波模块与一个所述第二磁珠连接；其中，每一个所述子滤波模块均包括：第一电感，所述第一电感的一端与所述第二磁珠连接；第一电容，所述第一电容的一端与所述第一电感的另一端连接，所述第一电容的另一端与公共端口连接；其中，将N个所述子滤波模块依次连接的端口作为所述公共端口，所述公共端口用于输出所述反馈信号；第二电感，所述第二电感的一端与所述第一电感的另一端连接，所述第二电感的另一端与所述谐波滤除电路的目标输出端连接；其中，所述目标输出端用于输出所述目标滤波信号；所述第三滤波模块还包括：第三电感，所述第三电感的一端与所述第一磁珠的另一端连接，所述第三电感的另一端与所述目标输出端连接。In some embodiments, the third filtering module includes: N sub-filtering modules, one of the sub-filtering modules is connected to one of the second magnetic beads; wherein each of the sub-filtering modules includes: a first inductor , one end of the first inductor is connected to the second magnetic bead; for the first capacitor, one end of the first capacitor is connected to the other end of the first inductor, and the other end of the first capacitor is connected to the common port wherein, the ports where the N sub-filter modules are connected in sequence are used as the common port, and the common port is used to output the feedback signal; a second inductor, one end of the second inductor is connected to the first The other end of the inductor is connected, and the other end of the second inductor is connected to the target output end of the harmonic filtering circuit; wherein, the target output end is used to output the target filtering signal; the third filtering module It also includes: a third inductor, one end of the third inductor is connected to the other end of the first magnetic bead, and the other end of the third inductor is connected to the target output end.
在一些实施例中，所述子滤波模块还包括：第二电容，所述第二电容与所述第一电容并联连接；其中，将所述第一电容和所述第二电容的连接端口作为所述公共端口。In some embodiments, the sub-filtering module further includes: a second capacitor, the second capacitor is connected in parallel with the first capacitor; wherein the connection port of the first capacitor and the second capacitor is used as the public port.
在一些实施例中，所述子滤波模块还包括：第一电阻，所述第一电阻与所述第一电容并联连接。In some embodiments, the sub-filter module further includes: a first resistor connected in parallel with the first capacitor.
在一些实施例中，所述子滤波模块还包括：第二电阻，所述第二电阻的一端与所述第一电容的一端连接，所述第二电阻的另一端与所述第一电感的另一端连接。In some embodiments, the sub-filter module further includes: a second resistor, one end of the second resistor is connected to one end of the first capacitor, and the other end of the second resistor is connected to the first inductor Connect the other end.
第二方面，本申请还提供了一种电机控制设备，包括：信号生成电路，所述信号生成电路用于生成脉宽调制信号；如上述任一项实施例所述的谐波滤除电路，所述谐波滤除电路与所述信号生成电路连接，所述谐波滤除电路用于根据所述脉宽调制信号生成所述目标滤波信号。In a second aspect, the present application further provides a motor control device, including: a signal generation circuit, the signal generation circuit is used to generate a pulse width modulation signal; the harmonic filtering circuit according to any one of the above embodiments, The harmonic filtering circuit is connected to the signal generating circuit, and the harmonic filtering circuit is configured to generate the target filtering signal according to the pulse width modulation signal.
在一些实施例中，所述信号生成电路包括：整流模块，所述整流模块用于生成直流信号；逆变模块，所述逆变模块分别与所述整流模块、所述谐波滤除电路连接；其中，所述逆变模块的中性点与所述第三滤波模块的公共端口连接；所述谐波滤除电路还用于根据所述脉宽调制信号生成反馈信号，所述逆变模块用于根据所述直流信号、所述反馈信号更新所述脉宽调制信号。In some embodiments, the signal generating circuit includes: a rectifier module, which is used to generate a DC signal; an inverter module, which is connected to the rectifier module and the harmonic filtering circuit, respectively ; wherein, the neutral point of the inverter module is connected to the common port of the third filter module; the harmonic filtering circuit is also used to generate a feedback signal according to the pulse width modulation signal, and the inverter module for updating the pulse width modulation signal according to the DC signal and the feedback signal.
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.
附图说明Description of drawings
下面结合附图和实施例对本发明做进一步的说明，其中：The present invention will be further described below in conjunction with the accompanying drawings and embodiments, wherein:
图1为本发明实施例谐波滤除电路的一框架示意图；1 is a schematic diagram of a framework of a harmonic filtering circuit according to an embodiment of the present invention;
图2为本发明实施例谐波滤除电路的另一框架示意图；2 is a schematic diagram of another framework of a harmonic filtering circuit according to an embodiment of the present invention;
图3为本发明实施例谐波滤除电路的一结构示意图。FIG. 3 is a schematic structural diagram of a harmonic filtering circuit according to an embodiment of the present invention.
附图标记：谐波滤除电路100、第一滤波模块110、第二滤波模块120、第三滤波模块130、第一电感组111、第二电感组112、子滤波模块131、信号生成电路200、整流模块210、逆变模块220。Reference numerals:
具体实施方式Detailed ways
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.
在本发明的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
在本发明的描述中，若干的含义是一个以上，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。In the description of the present invention, the meaning of several means one or more, the meaning of multiple means two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.
本发明的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明中的具体含义。In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.
本发明的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of the present invention, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" or the like is meant to be used in conjunction with the embodiment. A particular feature, structure, material or characteristic described or exemplified is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
需要说明的是，电机控制设备可以是变频器或者伺服驱动器，电机控制设备是用于将工频电压信号转换成其他不同频率的交流电压信号，以实现电机变速运行的设备。电机控制设备包括整流模块、逆变模块和滤波电路等。其中，整流模块与交流电源连接，整流模块用于将交流电源产生的交流电信号转换成直流电信号。逆变模块与整流模块连接，逆变模块用于将直流电信号逆变为矩形波信号(脉宽调制信号)。由于逆变模块在逆变过程中每相桥臂上下开关管轮流进行开通，桥臂中点电位会随之发生准阶跃变化，因此，逆变模块会形成一个非线性负载，而非线性负载是电机控制设备中产生谐波的根本原因。具体的，当工频电压信号加载在非线性负载上时，会形成畸变的非正弦电路，即电机控制设备中有谐波产生。在逆变模块中，由于逆变模块的开关特性，逆变模块输出的矩形波信号含有很多高频谐波，这些高频谐波将会以各种方式传导出去，形成对其他设备的电磁干扰。It should be noted that the motor control device may be a frequency converter or a servo drive, and the motor control device is a device used to convert the power frequency voltage signal into other AC voltage signals of different frequencies to realize the variable speed operation of the motor. Motor control equipment includes rectifier modules, inverter modules and filter circuits. The rectifier module is connected to the AC power source, and the rectifier module is used to convert the AC signal generated by the AC power source into a DC signal. The inverter module is connected with the rectifier module, and the inverter module is used for inverting the direct current signal into a rectangular wave signal (pulse width modulation signal). Since the inverter module turns on the upper and lower switches of each phase bridge arm in turn during the inverter process, the potential at the midpoint of the bridge arm will undergo a quasi-step change. Therefore, the inverter module will form a nonlinear load, and the nonlinear load will It is the root cause of harmonics in motor control equipment. Specifically, when a power frequency voltage signal is loaded on a non-linear load, a distorted non-sinusoidal circuit will be formed, that is, harmonics are generated in the motor control equipment. In the inverter module, due to the switching characteristics of the inverter module, the rectangular wave signal output by the inverter module contains many high-frequency harmonics, and these high-frequency harmonics will be conducted in various ways, causing electromagnetic interference to other equipment. .
为此，本申请提供了一种谐波滤除电路，能够有效滤除逆变过程中产生的高频谐波，从而减少电磁干扰。To this end, the present application provides a harmonic filter circuit, which can effectively filter out high-frequency harmonics generated in the inverter process, thereby reducing electromagnetic interference.
请参阅图1，第一方面，本申请提供了一种谐波滤除电路100，所述谐波滤除电路100应用于电机控制设备，所述电机控制设备包括变频器或伺服驱动器，所述谐波滤除电路100用于滤除电机控制设备中的谐波信号；所述谐波滤除电路100用于与信号生成电路200连接；其中，所述信号生成电路200用于生成脉宽调制信号，所述谐波滤除电路100还用于根据所述脉宽调制信号生成目标滤波信号，所述谐波滤除电路100包括：第一滤波模块110，所述第一滤波模块110与所述信号生成电路200连接，所述第一滤波模块110用于对所述脉宽调制信号进行调制、滤波操作，以生成正弦波信号；第二滤波模块120，所述第二滤波模块120分别与所述第一滤波模块110、所述信号生成电路200连接，所述第二滤波模块120用于对所述正弦波信号进行高频滤波操作，以生成初始滤波信号；第三滤波模块130，所述第三滤波模块130与所述第二滤波模块120连接，所述第二滤波模块120用于对所述初始滤波信号进行滤波操作，以生成所述目标滤波信号。Referring to FIG. 1 , in a first aspect, the present application provides a
可以理解的是，谐波滤除电路100与信号生成电路200连接，谐波滤除电路100用于减少或者消除脉宽调制信号中的谐波，以生成目标滤波信号，并减少谐波带来的电磁干扰。谐波滤除电路100包括第一滤波模块110、第二滤波模块120和第三滤波模块130。其中，第一滤波模块110与信号生成电路200连接，第二滤波模块120分别与第一滤波模块110和信号生成电路200连接，第三滤波模块130与第二滤波模块120连接，第三滤波模块130还与长线电缆连接，长线电缆用于传输目标滤波信号给电机，以控制电机变速运行。It can be understood that the
可以理解的是，由于信号生成电路200输出的脉宽调制信号为矩形波信号，而控制电机变速运行需要正弦波信号。为此，本实施例谐波滤除电路100设置了相应的第一滤波模块110，第一滤波模块110用于将脉宽调制信号转换为正弦波信号，以通过长线电缆传输给电机，从而控制电机变速运行。其中，第一滤波模块110用于对脉宽调制信号的波形进行调制操作，以生成具有正弦波波形的正弦波信号。此外，第一滤波模块110还用于对脉宽调制信号进行滤波操作，以滤除脉宽调制信号中的部分高频谐波。It can be understood that since the pulse width modulation signal output by the
可以理解的是，由于第一滤波模块110主要用于对脉宽调制信号的波形进行调制，且只能滤波部分高频谐波，因此经过第一滤波模块110的调制、滤波操作后，生成的正弦波信号仍然含有较多高频谐波。为此，本实施例中谐波滤除电路100设置了相应的第二滤波模块120，第二滤波模块120用于对第一滤波模块110输出的正弦波信号进行高频滤波操作，以生成初始滤波信号，并滤除正弦波信号中的部分高频谐波。此外，第二滤波模块120对正弦波信号中部分高频谐波的滤除，能够减少后续第三滤波模块130的滤波压力。It can be understood that, since the
可以理解的是，第一滤波模块110和第二滤波模块120能够对脉宽调制信号的高频谐波进行简单滤除，从第二滤波模块120输出的初始滤波信号仍然含有较多的高频谐波。为此，本实施例谐波滤除电路100设置了相应的第三滤波模块130，第三滤波模块130用于对初始滤波信号进行滤波操作，以生成目标滤波信号。具体的，第三滤波模块130能够对初始滤波信号的高频谐波进行有效衰减，并对处于低频段的初始滤波信号实现较大的增益，从而获得具有良好输出特性的目标滤波信号。It can be understood that the
本实施例中谐波滤除电路100通过设置第一滤波模块110，以生成相应的正弦波信号，并通过第二滤波模块120对正弦波信号的部分高频谐波进行滤除，以生成相应的初始滤波信号，最终通过第三滤波模块130对初始滤波信号的高频谐波进行滤波，并且对低频段的初始滤波信号进行增益，以生成相应的目标滤波信号。本实施例的谐波滤除电路100结构简单，易于实现，且能够对脉宽调制信号实现波形调制和较好的高频谐波滤除，从而减少电磁干扰。In this embodiment, the
请参阅图2，在一些实施例中，所述第三滤波模块130还与所述信号生成电路200连接，所述第三滤波模块130还用于根据所述初始滤波信号生成反馈信号；其中，所述信号生成电路200用于根据所述反馈信号更新所述脉宽调制信号。Referring to FIG. 2, in some embodiments, the
可以理解的是，由上述内容可知，信号生成电路200在生成脉宽调制信号的过程中会伴随有高频谐波的生成，为此，本实施例的第三滤波模块130还用于根据初始滤波信号生成反馈信号，并将反馈信号传输给信号生成电路200，以抑制信号生成电路200中高频谐波的产生，从而在根源上解决高频谐波的问题。其中，反馈信号用于表征第三滤波模块130滤除得到的高频谐波。It can be understood that, from the above content, the
请参阅图3，在一些实施例中，所述信号生成电路200为三相输出电路，所述第一滤波模块110包括：第一电感组111，所述第一电感组111的一端与所述信号生成电路200连接，所述第一电感组111包括N个第一共模电感，一个所述第一共模电感与所述信号生成电路200的一相输出连接；其中，N为正整数；第二电感组112，所述第二电感组112的一端与所述第一电感组111的另一端连接，所述第二电感组112包括N个第二共模电感，一个所述第二共模电感与一个所述第一共模电感连接。Referring to FIG. 3 , in some embodiments, the
可以理解的是，本实施例以信号生成电路200为三相输出电路为例进行说明。具体的，当信号生成电路200为三相输出电路时，第一电感组111包括三个第一共模电感，第二电感组112包括三个第二共模电感。其中，一个第一共模电感分别与信号生成电路200的一相输出连接，一个第二共模电感分别与一个第一共模电感连接。It can be understood that, in this embodiment, the
具体的，由上述内容可知，脉宽调制信号中高频谐波还会导致电磁干扰的产生，其中，电磁干扰包括共模干扰和差模干扰。一方面，共模电感(第一共模电感或第二共模电感)均能够对脉宽调制信号的波形进行调制，以生成正弦波信号，另一方面，当干扰信号(共模干扰信号或差模干扰信号)经过共模电感时，共模电感会呈现出高阻抗特性，产生很强的阻尼效果，从而对干扰信号进行有效的衰减。Specifically, as can be seen from the above content, the high frequency harmonics in the pulse width modulation signal can also lead to the generation of electromagnetic interference, wherein the electromagnetic interference includes common mode interference and differential mode interference. On the one hand, the common mode inductor (the first common mode inductor or the second common mode inductor) can modulate the waveform of the PWM signal to generate a sine wave signal; on the other hand, when the interference signal (common mode interference signal or When the differential mode interference signal) passes through the common mode inductance, the common mode inductance will show a high impedance characteristic, resulting in a strong damping effect, thereby effectively attenuating the interference signal.
请再次参阅图3，在一些实施例中，所述第二滤波模块120包括：一个第一磁珠，所述第一磁珠的一端与所述信号生成电路200的接地端连接；N个第二磁珠，一个所述第二磁珠与一个所述第二共模电感连接。Referring to FIG. 3 again, in some embodiments, the
可以理解的是，本实施例以信号生成电路200为三相输出电路为例进行说明。具体的，当信号生成电路200为三相输出电路时，第二滤波模块120包括一个第一磁珠和三个第二磁珠。其中，第一磁珠与信号生成电路200的接地端连接，一个第二磁珠分别与一个第二共模电感连接。It can be understood that, in this embodiment, the
具体的，磁珠(第一磁珠或第二磁珠)有很高的电阻率和磁导率，具有优异的抑制电磁干扰性能。此外，由于磁珠对高频谐波具有较大的阻碍作用，因此，当正弦波信号经过磁珠时，磁珠能够将其中的高频谐波转换成热能并消耗掉，从而滤除正弦波信号中的部分高频谐波，以生成初始滤波信号，同时大幅度降低谐波滤除电路100中的位移电流。Specifically, the magnetic bead (the first magnetic bead or the second magnetic bead) has high resistivity and magnetic permeability, and has excellent electromagnetic interference suppression performance. In addition, because the magnetic beads have a great hindering effect on high-frequency harmonics, when the sine wave signal passes through the magnetic beads, the magnetic beads can convert the high-frequency harmonics into heat energy and consume it, thereby filtering out the sine wave part of the high frequency harmonics in the signal to generate the initial filtered signal, while greatly reducing the displacement current in the
请再次参阅图3，在一些实施例中，所述第三滤波模块130包括：N个子滤波模块131，一个所述子滤波模块131与一个所述第二磁珠连接；其中，每一个所述子滤波模块131均包括：第一电感L1，所述第一电感L1的一端与所述第二磁珠连接；第一电容C1，所述第一电容C1的一端与所述第一电感L1的另一端连接，所述第一电容C1的另一端与公共端口连接；其中，将N个所述子滤波模块131依次连接的端口作为所述公共端口，所述公共端口用于输出所述反馈信号；第二电感L2，所述第二电感L2的一端与所述第一电感L1的另一端连接，所述第二电感L2的另一端与所述谐波滤除电路100的目标输出端连接；其中，所述目标输出端用于输出所述目标滤波信号；所述第三滤波模块130还包括：第三电感L3，所述第三电感L3的一端与所述第一磁珠的另一端连接，所述第三电感L3的另一端与所述目标输出端连接。Referring to FIG. 3 again, in some embodiments, the
可以理解的是，本实施例以信号生成电路200为三相输出电路为例进行说明。具体的，当信号生成电路200为三相输出电路时，第三滤波模块130包括三个子滤波模块131，一个子滤波模块131分别与一个第二磁珠连接。第三滤波模块130还包括第三电感L3，第三电感L3用于与第一磁珠连接。It can be understood that, in this embodiment, the
具体的，子滤波模块131包括第一电感L1、第二电感L2和第一电容C1。其中，第一电感L1与第二磁珠连接，第一电感L1和第二电感L2串联连接，第一电容C1与第一电感L1、第二电感L2的连接节点连接。当第三滤波模块130三个子滤波模块131时，将三个子滤波模块131的第一电容C1的连接节点作为公共端口。Specifically, the sub-filter module 131 includes a first inductor L1, a second inductor L2 and a first capacitor C1. The first inductor L1 is connected to the second magnetic bead, the first inductor L1 and the second inductor L2 are connected in series, and the first capacitor C1 is connected to the connection node of the first inductor L1 and the second inductor L2. When the
具体的，当初始滤波信号输入到子滤波模块131中时，由于初始滤波信号含有高频谐波，且第一电容C1的阻抗随着谐波的频率增大而减小，因此，第一电容C1将为高频谐波提供低阻通路，以使得高频谐波注入到第一电容C1所在的支路。此外，由于第一电感L1和第二电感L2对于高频谐波具有高阻特性，因此将进一步抑制高频谐波注入到第二电感L2所在的支路。由此可知，初始滤波信号的高频谐波在经过子滤波模块131时，将会被滤除到第一电容C1的支路中，并作为反馈信号从公共端口输出。而初始滤波信号经过滤除操作后生成的目标滤波信号能够从第二电感L2的一端输出给长线电缆，以传输给电机进行变速控制。此外，本实施例中子滤波模块131在低频段的增益良好，且对处于高频段的高频谐波具有更好的衰减特性，因此能够有效滤除初始滤波信号的高频谐波。Specifically, when the initial filtering signal is input into the sub-filtering module 131, since the initial filtering signal contains high-frequency harmonics, and the impedance of the first capacitor C1 decreases as the frequency of the harmonics increases, the first capacitor C1 C1 will provide a low-resistance path for high-frequency harmonics, so that the high-frequency harmonics are injected into the branch where the first capacitor C1 is located. In addition, since the first inductance L1 and the second inductance L2 have high-resistance characteristics for high-frequency harmonics, the injection of the high-frequency harmonics into the branch where the second inductance L2 is located will be further suppressed. It can be seen from this that the high-frequency harmonics of the initial filtered signal will be filtered out into the branch of the first capacitor C1 when passing through the sub-filtering module 131, and output from the common port as a feedback signal. The target filtered signal generated after the initial filtering signal is filtered out can be output from one end of the second inductor L2 to the long-line cable, so as to be transmitted to the motor for variable speed control. In addition, the sub-filter module 131 in this embodiment has good gain in the low frequency band, and has better attenuation characteristics for the high frequency harmonics in the high frequency band, so it can effectively filter out the high frequency harmonics of the initial filtered signal.
可以理解的是，三个子滤波模块131分别对一相输出的初始滤波信号进行滤波操作，以得到相应的目标滤波信号和反馈信号。It can be understood that the three sub-filtering modules 131 respectively perform filtering operations on the initial filtering signal output by one phase to obtain the corresponding target filtering signal and feedback signal.
再次参阅图3，在一些实施例中，所述子滤波模块131还包括：第二电容C2，所述第二电容C2与所述第一电容C1并联连接；其中，将所述第一电容C1和所述第二电容C2的连接端口作为所述公共端口。Referring to FIG. 3 again, in some embodiments, the sub-filter module 131 further includes: a second capacitor C2, the second capacitor C2 is connected in parallel with the first capacitor C1; wherein the first capacitor C1 is connected and the connection port of the second capacitor C2 as the common port.
可以理解的是，第一电容C1和第二电容C2的比值可以为100:1，即相比之下，第一电容C1为小容量电容，第一电容C1为大容量电容。It can be understood that the ratio of the first capacitor C1 to the second capacitor C2 may be 100:1, that is, in contrast, the first capacitor C1 is a small-capacity capacitor, and the first capacitor C1 is a large-capacity capacitor.
具体的，第一电容C1为大容量电容，因此，第一电容C1对于高频谐波中较低频率的谐波滤除作用更强，而大容量电容滤除更高频率谐波的能力较弱。当第一电容C1与小容量的第二电容C2并联连接时，由于小容量电容具有很好的高频通过性，因此第二电容C2能够补充第一电容C1高频性能的不足。由此可见，本实施例通过将第一电容C1和第二电容C2并联连接，并以该电容组(第一电容C1和第二电容C2)作为高频滤波的低阻通路，相比于只有第一电容C1的低阻通路，该电容组能够增加滤波带宽。Specifically, the first capacitor C1 is a large-capacity capacitor. Therefore, the first capacitor C1 has a stronger filtering effect on harmonics of lower frequencies among high-frequency harmonics, while the ability of the large-capacity capacitor to filter out higher-frequency harmonics is stronger than that of the first capacitor C1. weak. When the first capacitor C1 is connected in parallel with the small-capacity second capacitor C2, since the small-capacity capacitor has good high-frequency passability, the second capacitor C2 can supplement the insufficiency of the high-frequency performance of the first capacitor C1. It can be seen that in this embodiment, by connecting the first capacitor C1 and the second capacitor C2 in parallel, and using the capacitor group (the first capacitor C1 and the second capacitor C2) as a low-resistance path for high-frequency filtering, compared with only The low-resistance path of the first capacitor C1, the capacitor group can increase the filtering bandwidth.
请再次参阅图3，在一些实施例中，所述子滤波模块131还包括：第一电阻R1，所述第一电阻R1与所述第一电容C1并联连接。Referring to FIG. 3 again, in some embodiments, the sub-filtering module 131 further includes: a first resistor R1, and the first resistor R1 is connected in parallel with the first capacitor C1.
可以理解的是，第一电阻R1与第一电容C1并联连接，以组成充放电电路，通过调节第一电阻R1和第一电容C1的大小能够控制第一电容C1的充放电时间，从而能够控制目标滤波信号的输出波形。此外，第一电阻R1和第一电容C1还用于组成高频谐波泄放通路。当子滤波模块131需要滤除的高频谐波较多时，可以通过高频谐波泄放通路进行泄放，以保证第三滤波模块130的有效滤波。It can be understood that the first resistor R1 is connected in parallel with the first capacitor C1 to form a charging and discharging circuit, and the charging and discharging time of the first capacitor C1 can be controlled by adjusting the size of the first resistor R1 and the first capacitor C1, thereby controlling the charging and discharging time of the first capacitor C1. The output waveform of the target filtered signal. In addition, the first resistor R1 and the first capacitor C1 are also used to form a high-frequency harmonic discharge path. When the sub-filtering module 131 needs to filter out many high-frequency harmonics, the high-frequency harmonics can be discharged through the high-frequency harmonic discharge path, so as to ensure the effective filtering of the
请再次参阅图3，在一些实施例中，所述子滤波模块131还包括：第二电阻R2，所述第二电阻R2的一端与所述第一电容C1的一端连接，所述第二电阻R2的另一端与所述第一电感L1的另一端连接。Referring to FIG. 3 again, in some embodiments, the sub-filter module 131 further includes: a second resistor R2, one end of the second resistor R2 is connected to one end of the first capacitor C1, and the second resistor R2 is connected to one end of the first capacitor C1. The other end of R2 is connected to the other end of the first inductor L1.
可以理解的是，子滤波模块131的第一电容C1在对高频谐波进行滤除的过程中，由于其频率响应处于谐振频率时会存在谐振尖峰，使得子滤波模块131更易发生振荡，从而容易导致谐波滤除电路100的不稳定，为此，本实施例中子滤波模块131还设置了相应的第二电阻R2，第二电阻R2与第一电容C1串联连接，第二电阻R2能够对谐振尖峰进行有效阻尼，从而避免发生振荡，并保证谐波滤除电路100的稳定性。It can be understood that, in the process of filtering the high-frequency harmonics of the first capacitor C1 of the sub-filter module 131, since the frequency response of the first capacitor C1 is at the resonant frequency, there will be a resonance peak, which makes the sub-filter module 131 more prone to oscillation, thereby It is easy to cause the instability of the
请再次参阅图3，第二方面，本申请还提供了一种电机控制设备，包括：信号生成电路200，所述信号生成电路200用于生成脉宽调制信号；如上述任一项实施例所述的谐波滤除电路100，所述谐波滤除电路100与所述信号生成电路200连接，所述谐波滤除电路100用于根据所述脉宽调制信号生成所述目标滤波信号。Referring to FIG. 3 again, in a second aspect, the present application further provides a motor control device, including: a
由此可见，上述谐波滤除电路100实施例中的内容均适用于本电机控制设备的实施例中，本电机控制设备实施例所具体实现的功能与上述谐波滤除电路100实施例相同，并且达到的有益效果与上述谐波滤除电路100实施例所达到的有益效果也相同。It can be seen that the content in the above-mentioned embodiment of the
请再次参阅图3，在一些实施例中，所述信号生成电路200包括：整流模块210，所述整流模块210用于生成直流信号；逆变模块220，所述逆变模块220分别与所述整流模块210、所述谐波滤除电路100连接；其中，所述逆变模块220的中性点与所述第三滤波模块130的公共端口连接；所述谐波滤除电路100还用于根据所述脉宽调制信号生成反馈信号，所述逆变模块220用于根据所述直流信号、所述反馈信号更新所述脉宽调制信号。Referring to FIG. 3 again, in some embodiments, the
可以理解的是，由上述内容可知，逆变模块220用于根据直流信号生成脉宽调制信号，在逆变过程中，会伴随有高频谐波的生成，为此，本实施例中电机控制设备将第三滤波模块130生成的反馈信号反相输入给逆变模块220的中性点，使得反相的反馈信号与逆变模块220产生的高频谐波进行对冲，从而有效降低了逆变模块220中高频谐波的输出。It can be understood that, as can be seen from the above content, the inverter module 220 is used to generate a pulse width modulation signal according to the DC signal. During the inverter process, high-frequency harmonics will be generated. Therefore, in this embodiment, the motor control The device reversely inputs the feedback signal generated by the
上面结合附图对本发明实施例作了详细说明，但是本发明不限于上述实施例，在所属技术领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。此外，在不冲突的情况下，本发明的实施例及实施例中的特征可以相互组合。The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, various Variety. Furthermore, the embodiments of the present invention and features in the embodiments may be combined with each other without conflict.
Claims (10)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210715991.6ACN115224929A (en) | 2022-06-23 | 2022-06-23 | Harmonic filtering circuit and motor control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210715991.6ACN115224929A (en) | 2022-06-23 | 2022-06-23 | Harmonic filtering circuit and motor control equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115224929Atrue CN115224929A (en) | 2022-10-21 |
Family
ID=83609737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210715991.6APendingCN115224929A (en) | 2022-06-23 | 2022-06-23 | Harmonic filtering circuit and motor control equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115224929A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11225477A (en)* | 1998-02-05 | 1999-08-17 | Shinko Electric Co Ltd | Sine wave converter with filtering function |
| CN104406515A (en)* | 2014-12-01 | 2015-03-11 | 杭州湘滨电子科技有限公司 | Variable-reluctance stimulation and decoding module for measuring position angle of rotor of permanent magnet synchronous motor |
| CN106561000A (en)* | 2016-12-09 | 2017-04-12 | 天津贤睿科技发展有限公司 | Mobile terminal with waveform transformation circuit |
| CN107979273A (en)* | 2017-12-26 | 2018-05-01 | 苏州科可瑞尔航空技术有限公司 | Power filter protects circuit |
| CN211151813U (en)* | 2019-11-14 | 2020-07-31 | 中科汇安科技成都有限公司 | Filter for power inverter |
| CN113437865A (en)* | 2021-05-19 | 2021-09-24 | 深圳供电局有限公司 | Power supply unit and anti-electromagnetic interference device thereof |
- 2022
- 2022-06-23CNCN202210715991.6Apatent/CN115224929A/enactivePending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11225477A (en)* | 1998-02-05 | 1999-08-17 | Shinko Electric Co Ltd | Sine wave converter with filtering function |
| CN104406515A (en)* | 2014-12-01 | 2015-03-11 | 杭州湘滨电子科技有限公司 | Variable-reluctance stimulation and decoding module for measuring position angle of rotor of permanent magnet synchronous motor |
| CN106561000A (en)* | 2016-12-09 | 2017-04-12 | 天津贤睿科技发展有限公司 | Mobile terminal with waveform transformation circuit |
| CN107979273A (en)* | 2017-12-26 | 2018-05-01 | 苏州科可瑞尔航空技术有限公司 | Power filter protects circuit |
| CN211151813U (en)* | 2019-11-14 | 2020-07-31 | 中科汇安科技成都有限公司 | Filter for power inverter |
| CN113437865A (en)* | 2021-05-19 | 2021-09-24 | 深圳供电局有限公司 | Power supply unit and anti-electromagnetic interference device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104426408B (en) | Translation circuit and be applied to translation circuit conversion electric power changing method | |
| US5473530A (en) | Four-quadrant pulse width modulated DC/AC converter | |
| CN100514831C (en) | Grid-connected inverter current control method employing inductance current weighted average value to feed back | |
| CN1851998A (en) | Parallel-in inverter current control method adopting filter intermediate current feed-back | |
| CN102843020A (en) | Method for inhibiting second harmonic current of preceding-stage inverter of two-stage inverter and control circuit of preceding-stage inverter of two-stage inverter | |
| CN114844383B (en) | Voltage control method, system and device based on load current feedforward | |
| CN110995044A (en) | Nonlinear correction device for power switch device | |
| CN117294121B (en) | E-class constant-frequency power amplifier parallel driving system of inversion switching circuit and radio frequency power supply | |
| CN113690889A (en) | Power harmonic treatment method for improving active power filter by novel multi-level converter | |
| CN105337481A (en) | LCL type grid-connected inverter control method | |
| CN106549591B (en) | Three level T-type Inverter Dead-times of one kind eliminate and dead area compensation integrated processes | |
| CN108390572A (en) | Active third-harmonic zero-sequence voltage matrix converter input current waveform optimizes topological structure | |
| JP2025031654A (en) | Wireless charging system with variable topology structure of variable capacitor on the receiving side | |
| CN111064380A (en) | A grid-connected inverter system | |
| CN110266017B (en) | Hybrid state feedback virtual damping control method for LCL (lower control limit) type active power filter | |
| CN114244165B (en) | Hybrid multilevel converter control method based on open-loop common-mode voltage injection | |
| CN115224929A (en) | Harmonic filtering circuit and motor control equipment | |
| CN109149979A (en) | A kind of high-power voltage-controlled type negative resistance for resonance circuit | |
| CN109001659A (en) | A kind of gradient amplifier and magnetic resonance imaging device | |
| CN113892236B (en) | Filter and circuit for a transmit channel | |
| CN116388595A (en) | An Inverted Split Phase Output Topology, Its Modulation Method and Inverter | |
| CN214014124U (en) | Non-overlap-time six-switch symmetrical inductor configuration current type grid-connected inverter | |
| CN215300481U (en) | Transform system | |
| CN101944887B (en) | Single-ended Output Class-D Amplifier with Dual Feedback Differential Loop | |
| CN212324012U (en) | Phase-shift frequency-doubling switch power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |