CN103762875B - A kind of asymmetric dual output Z source half-bridge converter - Google Patents

Abstract

Translated fromChinese

本发明提供一种非对称型双输出Z源半桥变换器，包括直流电源、二极管，第一电容、第二电容，第一电感、第二电感，第一开关管、第二开关管、第三开关管、第一负载和第二负载。第一电感、第二电感、第一电容和第二电容组成Z源阻抗，Z源阻抗的存在一方面避免了因开关管直通而引起的损毁，另一方面当开关管直通时还起到升压的作用。通过控制三个开关管的导通占空比，可以分别控制两路输出的升压和降压，并实现两路输出电压的正负脉冲的对称和不对称。本发明只用了三个开关管，且在电源侧不需要并联任何电容，能够实现双路输出。本发明具有高可靠性、宽输出电压范围和丰富的输出交流脉冲波形，特别适用于双输出的电解电镀等电化学电源装置。

The present invention provides an asymmetric dual-output Z-source half-bridge converter, which includes a DC power supply, a diode, a first capacitor, a second capacitor, a first inductor, a second inductor, a first switch tube, a second switch tube, and a second switch tube. Three switching tubes, a first load and a second load. The first inductance, the second inductance, the first capacitor and the second capacitor form the Z source impedance. On the one hand, the existence of the Z source impedance avoids the damage caused by the straight-through of the switch tube. The role of pressure. By controlling the conduction duty cycle of the three switching tubes, the boost and step-down of the two outputs can be controlled respectively, and the symmetry and asymmetry of the positive and negative pulses of the two output voltages can be realized. The invention only uses three switch tubes, and does not need to connect any capacitance in parallel on the power supply side, and can realize dual output. The invention has high reliability, wide output voltage range and rich output AC pulse waveform, and is especially suitable for electrochemical power supply devices such as double output electrolytic plating.

Description

Translated fromChinese

一种非对称型双输出Z源半桥变换器An Asymmetric Dual-Output Z-Source Half-Bridge Converter

技术领域technical field

本发明涉及电力电子变换器技术领域，具体涉及一种非对称型双输出Z源半桥变换器。The invention relates to the technical field of power electronic converters, in particular to an asymmetric double-output Z-source half-bridge converter.

背景技术Background technique

常规的半桥变换器，逆变桥臂直接与直流电压源并联，当逆变桥臂的上、下开关管因误触发而直通时，会流过非常大的电流而使开关管损毁。而且，这类半桥逆变器输出交流电压的幅值只有输入电压的一半，属于降压型逆变器，输出电压的范围比较窄。为了提高输出交流电压的幅值，传统的做法是在逆变器前级加入升压环节，或在输出端接变压器进行升压。在逆变器前级加入升压环节的方案中至少需要多用一个开关管，这增加了功率传递中的开关损耗，也增加了控制的复杂性。在逆变器输出端接变压器虽然可以提高输出电压的幅值，但是当变压器匝比固定时，输出交流电压的幅值是一定值。In a conventional half-bridge converter, the inverter bridge arm is directly connected in parallel with the DC voltage source. When the upper and lower switch tubes of the inverter bridge arm are switched through due to false triggering, a very large current will flow and the switch tube will be damaged. Moreover, the amplitude of the output AC voltage of this type of half-bridge inverter is only half of the input voltage, which belongs to the step-down inverter, and the output voltage range is relatively narrow. In order to increase the amplitude of the output AC voltage, the traditional method is to add a step-up link in the front stage of the inverter, or to connect a transformer at the output end for step-up. In the scheme of adding a step-up link in the front stage of the inverter, at least one more switching tube is required, which increases the switching loss in power transmission and also increases the complexity of control. Although connecting a transformer at the output end of the inverter can increase the amplitude of the output voltage, when the transformer turns ratio is fixed, the amplitude of the output AC voltage is a certain value.

目前，有相关专利提出使用Z源半桥变换器来解决上述问题，但是当需要两路输出的时候，就需要两个Z源半桥变换器。而两个Z源半桥变换器，需要两个电源，四个储能电容，四个开关管，以及两个Z源阻抗。除此，相应的控制会增加成本和控制难度，降低系统的稳定性。At present, related patents propose to use Z-source half-bridge converters to solve the above problems, but when two outputs are required, two Z-source half-bridge converters are required. The two Z-source half-bridge converters require two power supplies, four energy storage capacitors, four switching tubes, and two Z-source impedances. In addition, the corresponding control will increase the cost and control difficulty, and reduce the stability of the system.

发明内容Contents of the invention

本发明的目的在于克服上述现有技术的不足，提供一种非对称型双输出Z源半桥变换器。本发明只需要一个电源，三个开关管，以及一个Z源阻抗。比传统的两个Z源半桥变换器，少了一个电源，四个储能电容，一个开关管和一个Z源阻抗，却能达到比传统Z源半桥变换器高的输出增益，且具有高可靠性、宽输出电压范围和丰富的输出交流脉冲波形，特别适用于双输出的电解电镀等电化学电源装置。The object of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an asymmetrical double-output Z-source half-bridge converter. The invention only needs one power supply, three switch tubes, and one Z source impedance. Compared with the traditional two Z-source half-bridge converters, there is one less power supply, four energy storage capacitors, one switch tube and one Z-source impedance, but it can achieve higher output gain than the traditional Z-source half-bridge converter, and has High reliability, wide output voltage range and rich output AC pulse waveform, especially suitable for electrochemical power supply devices such as dual output electrolytic plating.

本发明通过如下技术方案实现：The present invention realizes through following technical scheme:

一种非对称型双输出Z源半桥变换器，包括直流电源、二极管，第一电容、第二电容、第一电感、第二电感、第一开关管、第二开关管、第三开关管、第一负载和第二负载。本发明所述一种非对称型双输出Z源半桥变换器，Z源阻抗的一端口并联在直流电源和二极管串联而成的输入端，Z源阻抗另外一端口并联在三个开关管串联而成的桥臂两端，且第一负载连接在第一开关管与第二开关管的连接点和第一电容的一端之间，第二负载连接在第二开关管与第三开关管的连接点和第二电容一端之间。所述Z源阻抗，是由第一电感、第二电感、第一电容和第二电容组成。An asymmetric dual-output Z-source half-bridge converter, including a DC power supply, a diode, a first capacitor, a second capacitor, a first inductor, a second inductor, a first switch tube, a second switch tube, and a third switch tube , the first load and the second load. An asymmetric dual-output Z-source half-bridge converter according to the present invention, one port of the Z-source impedance is connected in parallel to the input terminal formed by a DC power supply and a diode in series, and the other port of the Z-source impedance is connected in parallel to three switch tubes in series The two ends of the bridge arm formed, and the first load is connected between the connection point of the first switch tube and the second switch tube and one end of the first capacitor, and the second load is connected between the second switch tube and the third switch tube between the connection point and one end of the second capacitor. The Z source impedance is composed of a first inductor, a second inductor, a first capacitor and a second capacitor.

上述的一种非对称型双输出Z源半桥变换器中，所述输入电源的正极与二极管的阳极相连接，二极管的阴极、第一电感的一端和第一电容的一端连接于一点，第一电感的另外一端、第二电容的一端和第一开关管的漏极连接于一点，第一开关管的源极、第二开关管的漏极和第一负载的一端连接于一点，第二开关管的源极、第三开关管的漏极和第二负载的一端连接于一点，第一负载的另外一端、第二电感的一端和第一电容的另外一端连接于一点，第二负载的另外一端、第二电感的另外一端、第二电容的另外一端和电源的负极连接于一点。In the aforementioned asymmetric dual-output Z-source half-bridge converter, the anode of the input power supply is connected to the anode of the diode, and the cathode of the diode, one end of the first inductor, and one end of the first capacitor are connected to one point, and the second The other end of an inductor, one end of a second capacitor, and the drain of the first switching tube are connected at one point, the source of the first switching tube, the drain of the second switching tube, and one end of the first load are connected at one point, and the second The source of the switch tube, the drain of the third switch tube, and one end of the second load are connected to one point, the other end of the first load, one end of the second inductance, and the other end of the first capacitor are connected to one point, and the other end of the second load The other end, the other end of the second inductor, the other end of the second capacitor and the negative pole of the power supply are connected at one point.

与现有技术相比本发明具有如下优点：Compared with the prior art, the present invention has the following advantages:

本发明只需要一个电源，三个开关管，以及一个Z源阻抗。比传统的具有两路输出的两个Z源半桥变换器，少了一个电源，四个储能电容，一个开关管和一个Z源阻抗，却能达到比传统Z源半桥变换器高的输出增益，且具有高可靠性、宽输出电压范围和丰富的输出交流脉冲波形，特别适用于双输出的电解电镀等电化学电源装置。The invention only needs one power supply, three switch tubes, and one Z source impedance. Compared with the traditional two Z-source half-bridge converters with two outputs, there is one less power supply, four energy storage capacitors, one switch tube and one Z-source impedance, but it can achieve higher than traditional Z-source half-bridge converters. Output gain, and has high reliability, wide output voltage range and rich output AC pulse waveform, especially suitable for electrochemical power supply devices such as dual output electrolytic plating.

本发明的变换器可以防止开关管的直通对电路造成的损坏，且开关管直通时能得到较高的输出增益，克服传统半桥变换器输出局限于输入电压的缺点。The converter of the present invention can prevent the damage to the circuit caused by the straight-through of the switch tube, and can obtain higher output gain when the switch tube is straight-through, and overcomes the disadvantage that the output of the traditional half-bridge converter is limited to the input voltage.

附图说明Description of drawings

图1是本发明所述的一种非对称型双输出Z源半桥变换器的实施例的电路图；Fig. 1 is the circuit diagram of the embodiment of a kind of asymmetric type double output Z source half-bridge converter of the present invention;

图2a、图2b、图2c、图2d、图2e、图2f分别是图1所示电路图在一个开关周期内的主要工作模态图。Fig. 2a, Fig. 2b, Fig. 2c, Fig. 2d, Fig. 2e, and Fig. 2f are diagrams of the main working modes of the circuit diagram shown in Fig. 1 in one switching cycle respectively.

图3为一种双输出Z源半桥变换器的对应主要波形图。FIG. 3 is a corresponding main waveform diagram of a dual-output Z-source half-bridge converter.

具体实施方式detailed description

下面结合实施例及附图，对本发明作进一步的详细说明，但本发明的实施方式不限于此。The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

实施案例Implementation case

如图1所示，一种非对称型双输出Z源半桥变换器，其特征在于，包括直流电源V_d、二极管D，第一电容C₁、第二电容C₂、第一电感L₁、第二电感L₂、第一开关管S₁、第二开关管S₂、第三开关管S₃、第一负载R₁和第二负载R₂。本发明所述一种非对称型双输出Z源半桥变换器，Z源阻抗的一端口并联在直流电源和二极管串联而成的输入端，其另外一端口并联在三个开关管串联而成的桥臂两端，且第一开关管S₁与第二开关管S₂的连接点和第一电容C₁的一端连接着第一负载R₁，第二开关管与第三开关管S₃的连接点和的第二电容C₂一端连接着第二负载R₂；As shown in Figure 1, an asymmetric dual-output Z-source half-bridge converter is characterized in that it includes a DC power supply V_d , a diode D, a first capacitor C₁ , a second capacitor C₂ , and a first inductor L₁ , the second inductor L₂ , the first switching tube S₁ , the second switching tube S₂ , the third switching tube S₃ , the first load R₁ and the second load R₂ . An asymmetrical dual-output Z-source half-bridge converter according to the present invention, one port of the Z-source impedance is connected in parallel to the input end of the DC power supply and a diode in series, and the other port is connected in parallel to three switch tubes in series The two ends of the bridge arm, and the connection point of the first switching tube S₁ and the second switching tube S₂ and one end of the first capacitor C₁ are connected to the first load R₁ , the second switching tube and the third switching tube S₃ The connection point of and the second capacitor C₂ is connected to the second load R₂ ;

所述Z源阻抗，是由第一电感L₁、第二电感L₂、第一电容C₁和第二电容C₂组成；The Z source impedance is composed of a first inductance L₁ , a second inductance L₂ , a first capacitor C₁ and a second capacitor C₂ ;

一种非对称型双输出Z源半桥变换器，其特征在于，所述输入电源V_d的正极与二极管D的阳极相连接，二极管D的阴极、第一电感L₁的一端和第一电容C₁的一端连接于一点，第一电感L₁的另外一端、第二电容C₂的一端和第一开关管S₁的漏极连接于一点，第一开关管S₁的源极、第二开关管S₂的漏极和第一负载R₁的一端连接于一点，第二开关管S₂的源极、第三开关管S₃的漏极和第二负载R₂的一端连接于一点，第一负载R₁的另外一端、第二电感L₂的一端和第一电容C₁的另外一端连接于一点，第二负载R₂的另外一端、第二电感L₂的另外一端、第二电容C₂的另外一端和电源的负极连接于一点。A kind of asymmetric type double output Z source half-bridge converter, it is characterized in that, the anode of described input power supply V_d is connected with the anode of diode D, the cathode of diode D,_one end of first inductance L1 and the first electric capacity_One end of C1 is connected to one point, the other end of the first inductor L1,_one end of the_second capacitor C2 and the drain of the_first switch S1 are connected to_one point, the source of the first switch S1, the second_The drain of the switch S2 is connected to_one end of the first load R1 at one point, the source of the_second switch S2, the drain of the_third switch S3 and one end of the_second load R2 are connected to one point, The other end of the first load R1,_one end of the_second inductor L2 and the other end of the first capacitor_C1 are connected at one point, the other end of the_second load R2, the other end of the_second inductor L2, and the second capacitor_The other end of C2 is connected to the negative pole of the power supply at one point.

如图2a、2b、2c、2d、2e和2f所示，其中图2a是工作模态1的电路图，图2b是工作模态2的电路图，图2c是工作模态3的电路图，图2d是工作模态4的电路图，图2e是工作模态5的电路图，图2f是工作模态6的电路图。图中实线表示变换器中有电流流过的部分，虚线表示变换器中没有电流流过的部分，参考图3对其对应工作模态分析如下。其中第一开关管S₁、第二开关管S₂和第三开关管S₃三个开关管依次滞后D₁T时间段后开通，导通时间为D₂T，T为开关管开关周期。以顺时钟方向为电压的正参考方向。As shown in Fig. 2a, 2b, 2c, 2d, 2e and 2f, wherein Fig. 2a is the circuit diagram of working mode 1, Fig. 2b is the circuit diagram of working mode 2, Fig. 2c is the circuit diagram of working mode 3, Fig. 2d is The circuit diagram of working mode 4, FIG. 2e is the circuit diagram of working mode 5, and FIG. 2f is the circuit diagram of working mode 6. The solid line in the figure indicates the part where the current flows in the converter, and the dotted line indicates the part where the current does not flow in the converter. Referring to Figure 3, its corresponding working mode is analyzed as follows. The first switching tube S₁ , the second switching tube S₂ and the third switching tube S₃ are sequentially turned on after a delay of D₁ T for a period of time D₂ T , where T is the switching cycle of the switching tubes. Take the clockwise direction as the positive reference direction of the voltage.

第一电容C₁的电压为V_C1，第二电容C₂的电压为V_C1，第一电感L₁的电压为V_L1，第二电感L₂的电压为V_L2，第一负载的电压为v_o1，第二负载的电压为v_o2。The voltage of the first capacitor C₁ is V_C1 , the voltage of the second capacitor C₂ is V_C1 , the voltage of the first inductor L₁ is V_L1 , the voltage of the second inductor L₂ is V_L2 , and the voltage of the first load is v_o1 , the voltage of the second load is v_o2 .

工作模态1：Working mode 1:

如图3时间段[t₀-t₁]所示，第一开关管S₁、第二开关管S₂和第三开关管S₃三个开关管都导通，二极管D关断，此时的等效电路图如图2a所示。此时第一电容C₁为第一电感L₁充电，第一电感L₁电流直线上升，第一负载R₁被第二开关管S₂和第三开关管S₃导通而短路，输出电压V_o1为0。同时，第二电容C₂分别为第二电感L₂与第二负载R₂传输能量，电感L₂电流直线上升。第一电感L₁电压为：V_L1＝V_C1＝V_L2＝V_C2，输出电压v_o1＝0，v_o2＝V_C2＝V_L2。此阶段时间为(D₁+D₂-1)T。As shown in the time period [t₀ -t₁ ] in Figure 3, the first switching tube S₁ , the second switching tube S₂ and the third switching tube S₃ are all turned on, and the diode D is turned off. At this time The equivalent circuit diagram of is shown in Fig. 2a. At this time, the first capacitor_C1 charges the_first inductor L1, the current of the_first inductor L1 rises linearly, the_first load R1 is short-circuited by the_second switching tube S2 and the_third switching tube S3, and the output voltage V_o1 is 0. At the same time, the second capacitor C₂ transfers energy to the second inductor L₂ and the second load R₂ respectively, and the current of the inductor L₂ rises linearly. The voltage of the first inductor L₁ is: V_L1 =V_C1 =V_L2 =V_C2 , the output voltage v_o1 =0, v_o2 =V_C2 =V_L2 . The time of this stage is (D₁ +D₂ -1)T.

工作模态2：Working mode 2:

如图3时间段[t₁-t₂]所示，第二开关管S₂关断，第一开关管S₁和第三开关管S₃两个开关管都导通，二极管D导通，此时的等效电路图如图2b所示。电源V_d通过二极管D给电容第一电容C₁、第二电容C₂、第一电感L₁和第二电感L₂充电，同时电容C₁与电感L₁一起给第一负载R₁提供能量，L₁电感电流下降。第二电感L₂与第二负载R₂并联，给第二负载R₂传输能量，第二电感L₂电流下降。第一电感L₁电压为：V_L1＝V_d-V_C2，输出电压v_o1＝V_C1-V_L1，v_o2＝V_L2。此阶段时间为(1-D₂)T。As shown in the time period [t₁ -t₂ ] in FIG. 3 , the second switch tube S₂ is turned off, the first switch tube S₁ and the third switch tube S₃ are both turned on, and the diode D is turned on, The equivalent circuit diagram at this time is shown in Figure 2b. The power supply V_d charges the first capacitor C₁ , the second capacitor C₂ , the first inductor L₁ and the second inductor L₂ through the diode D, and at the same time, the capacitor C₁ and the inductor L₁ provide energy to the first load R₁ ,_L1 inductor current drops. The second inductor L₂ is connected in parallel with the second load R₂ to transmit energy to the second load R₂ , and the current of the second inductor L₂ drops. The voltage of the first inductor L₁ is: V_L1 =V_d -V_C2 , the output voltage v_o1 =V_C1 -V_L1 , and v_o2 =V_L2 . The time of this stage is (1-D₂ )T.

工作模态3：Working mode 3:

如图3时间段[t₂-t₃]所示，三个开关管都导通，二极管关断，此时的等效电路图如图2c所示。此阶段的原理和工作模态1相同。此阶段时间为(D₁+D₂-1)T。As shown in the time period [t₂ -t₃ ] in FIG. 3 , all three switches are turned on and the diodes are turned off. The equivalent circuit diagram at this time is shown in FIG. 2c. The principle of this stage is the same as working mode 1. The time of this stage is (D₁ +D₂ -1)T.

工作模态4：Working mode 4:

如图3时间段[t₃-t₄]所示，第三开关管S₃关断，其余两个开关管都导通，二极管导通，此时的等效电路图如图2d所示。电源V_d通过二极管D给第一电容C₁、第二电容C₂、第一电感L₁和第二电感L₂充电，同时第一电容C₁与电感L₁一起给第一负载R₁提供能量，电感电流下降。第二电容C₂与第二负载R₂并联，给二负载R₂传输能量。第一电感L₁电压为：V_L1＝V_d-V_C2，输出电压v_o1＝V_C1-V_L1，v_o2＝V_C2。此阶段时间为(1-D₂)T。As shown in the time period [t₃ -t₄ ] in FIG. 3 , the third switch tube S₃ is turned off, the other two switch tubes are turned on, and the diode is turned on. The equivalent circuit diagram at this time is shown in FIG. 2d . The power supply V_d charges the first capacitor C₁ , the second capacitor C₂ , the first inductor L₁ and the second inductor L₂ through the diode D, and at the same time, the first capacitor C₁ and the inductor L₁ provide the first load R₁ energy, the inductor current drops. The second capacitor C₂ is connected in parallel with the second load R₂ to transmit energy to the second load R₂ . The voltage of the first inductor L₁ is: V_L1 =V_d -V_C2 , the output voltage v_o1 =V_C1 -V_L1 , and v_o2 =V_C2 . The time of this stage is (1-D₂ )T.

工作模态5：Working mode 5:

如图3时间段[t₄-t₅]所示，第二开关管S₂关断，第一开关管S₁和第三开关管S₃两个开关管都导通，二极管D导通，此时的等效电路图如图2e所示。此阶段的原理和工作模态1相同。此阶段时间为(D₁+D₂-1)T。As shown in the time period [t₄ -t₅ ] in FIG. 3 , the second switch tube S₂ is turned off, the first switch tube S₁ and the third switch tube S₃ are both turned on, and the diode D is turned on, The equivalent circuit diagram at this time is shown in Fig. 2e. The principle of this stage is the same as working mode 1. The time of this stage is (D₁ +D₂ -1)T.

工作模态6：Working mode 6:

如图3时间段[t₅-t₆]所示，第一开关管S₁关断，第二开关管S₂和第三开关管S₃都导通，二极管导通，此时的等效电路图如图2f所示。R₁被第二开关管和第三开关管导通而成短路，输出电压V_o1为0。电源V_d通过二极管D给第一电容C₁、第二电容C₂、第一电感L₁和第二电感L₂充电。第二电感L₂与第二负载R₂并联，给第二负载R₂传输能量，第二电感L₂电流下降。第一负载L₁电压为：V_L1＝V_d-V_C2，输出电压v_o1＝0，v_o2＝V_L2。此阶段时间为(1-D₂)T。As shown in the time period [t₅ -t₆ ] in Figure 3, the first switch tube S₁ is turned off, the second switch tube S₂ and the third switch tube S₃ are both turned on, and the diode is turned on, and the equivalent The circuit diagram is shown in Fig. 2f. R₁ is short-circuited by the conduction of the second switch tube and the third switch tube, and the output voltage V_o1 is 0. The power supply V_d charges the first capacitor C₁ , the second capacitor C₂ , the first inductor L₁ and the second inductor L₂ through the diode D. The second inductor L₂ is connected in parallel with the second load R₂ to transmit energy to the second load R₂ , and the current of the second inductor L₂ drops. The voltage of the first load L₁ is: V_L1 =V_d -V_C2 , the output voltage v_o1 =0, v_o2 =V_L2 . The time of this stage is (1-D₂ )T.

综上所描述，根据电感的在一个开关周期中,根据电感L₁的伏-秒数守恒，得${\∫}_0^T{V}_{L1}\mathrm{dt}=0,$即$3({\∫}_0^{(D_2+D_1-1)T}{V}_{C2}\mathrm{dt}+{\∫}_{(D_2+D_1-1)T}^{D_{1}T}(V_d-V_{C2})\mathrm{dt})=0,$由此得In summary, according to the inductance in a switching cycle, according to the volt-second conservation of the inductance L₁ , we get${\∫}_0^T{V}_{L1}\mathrm{dt}=0,$ which is$3({\∫}_0^{({\mathrm{D.}}_2+{\mathrm{D.}}_1-1)T}{V}_{C2}\mathrm{dt}+{\∫}_{({\mathrm{D.}}_2+{\mathrm{D.}}_1-1)T}^{{\mathrm{D.}}_{1}T}(V_d-V_{C2})\mathrm{dt})=0,$ from this

${\mathrm{<span><span>V</span>V</span>}}_{\mathrm{<span><span>C</span>C</span>}\mathrm{<span><span>2</span>2</span>}}<span><span>=</span>=</span>\frac{\mathrm{<span><span>1</span>1</span>}<span><span>-</span>-</span>{\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>2</span>2</span>}}}{\mathrm{<span><span>2</span>2</span>}<span><span>-</span>-</span><span><span>(</span>(</span>{\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>1</span>1</span>}}<span><span>+</span>+</span>\mathrm{<span><span>2</span>2</span>}{\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>2</span>2</span>}}<span><span>)</span>)</span>}{\mathrm{<span><span>V</span>V</span>}}_{\mathrm{<span><span>d</span>d</span>}}<span><span>-</span>-</span><span><span>-</span>-</span><span><span>-</span>-</span><span><span>(</span>(</span>\mathrm{<span><span>1</span>1</span>}<span><span>)</span>)</span>$

由此可得到也由此得到输出表达式为From this we can get From this, the output expression is obtained as

与现有技术相比本发明具有如下优点：Compared with the prior art, the present invention has the following advantages:

本发明只需要一个电源，三个开关管，以及一个Z源阻抗。比传统的具有两路输出的两个Z源半桥变换器，少了一个电源，四个储能电容，一个开关管和一个Z源阻抗，却能达到比传统Z源半桥变换器高的输出增益，且能实现具有高可靠性、宽输出电压范围和丰富的输出交流脉冲波形，特别适用于多输出的电解电镀等电化学电源装置。The invention only needs one power supply, three switch tubes, and one Z source impedance. Compared with the traditional two Z-source half-bridge converters with two outputs, there is one less power supply, four energy storage capacitors, one switch tube and one Z-source impedance, but it can achieve higher than traditional Z-source half-bridge converters. Output gain, and can realize high reliability, wide output voltage range and rich output AC pulse waveform, especially suitable for electrochemical power supply devices such as multi-output electrolytic plating.

本发明的变换器可以防止开关管的直通，且开关管直通时能得到较高的输出增益，克服传统半桥变换器输出局限于输入电压的缺点。The converter of the invention can prevent the straight-through of the switch tube, and can obtain higher output gain when the switch tube is straight-through, and overcomes the shortcoming that the output of the traditional half-bridge converter is limited to the input voltage.

上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受所述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the embodiment, and any other changes, modifications, substitutions and combinations made without departing from the spirit and principle of the present invention , simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present invention.

Claims (1)

Translated fromChinese

1.一种非对称型双输出Z源半桥变换器，其特征在于，包括直流电源（V_d）,二极管（D）、第一电容（C₁）、第二电容（C₂）、第一电感（L₁）、第二电感（L₂），第一开关管（S₁）、第二开关管（S₂）、第三开关管（S₃）、第一负载（R₁）和第二负载（R₂）；第一电感（L₁）、第二电感（L₂）、第一电容（C₁）和第二电容（C₂）组成Z源阻抗，Z源阻抗的一端口并联在直流电源和二极管串联而成的输入端，Z源阻抗的另外一端口并联在第一开关管（S₁）、第二开关管（S₂）、第三开关管（S₃）串联而成的桥臂两端，第一负载（R₁）连接在第一开关管（S₁）与第二开关管（S₂）的连接点和第一电容（C₁）的一端之间，第二负载（R₂）连接在第二开关管与第三开关管（S₃）的连接点和第二电容（C₂）一端之间；1. An asymmetric dual-output Z-source half-bridge converter, characterized in that it includes a DC power supply (V_d ), a diode (D ), a first capacitor (C₁ ),a second capacitor (C₂ ), a second capacitor An inductor (L₁ ), a second inductor (L₂ ), a first switch (S₁ ), a second switch (S₂ ), a third switch (S₃ ), a first load (R₁ ) and The second load (R₂ ); the first inductance (L₁ ), the second inductance (L₂ ), the first capacitance (C₁ ) and the second capacitance (C₂ ) form Z source impedance, a port of Z source impedance It is connected in parallel to the input end of the DC power supply and the diode in series, and the other port of the Z source impedance is connected in parallel to the first switch tube (S₁ ), the second switch tube (S₂ ), and the third switch tube (S₃ ) in series. The two ends of the formed bridge arm, the first load (R₁ ) is connected between the connection point of the first switch tube (S₁ ) and the second switch tube (S₂ ) and one end of the first capacitor (C₁ ), the second The second load (R₂ ) is connected between the connection point of the second switch tube and the third switch tube (S₃ ) and one end of the second capacitor (C₂ );所述直流电源（V_d）的正极与二极管（D）的阳极相连接，二极管（D）的阴极、第一电感（L₁）的一端和第一电容（C₁）的一端连接于一点，第一电感（L₁）的另外一端、第二电容（C₂）的一端和第一开关管（S₁）的漏极连接于一点，第一开关管（S₁）的源极、第二开关管（S₂）的漏极和第一负载（R₁）的一端连接于一点，第二开关管（S₂）的源极、第三开关管（S₃）的漏极和第二负载（R₂）的一端连接于一点，第一负载（R₁）的另外一端、第二电感（L₂）的一端和第一电容（C₁）的另外一端连接于一点，第二负载（R₂）的另外一端、第二电感（L₂）的另外一端、第二电容（C₂）的另外一端和电源的负极连接于一点。The anode of the DC power supply (V_d ) is connected to the anode of the diode (D), and the cathode of the diode (D), one end of the first inductor (L₁ ) and one end of the first capacitor (C₁ ) are connected at one point, The other end of the first inductor (L₁ ), one end of the second capacitor (C₂ ) and the drain of the first switch (S₁ ) are connected at one point, and the source of the first switch (S₁ ) and the second The drain of the switch (S₂ ) is connected to one end of the first load (R₁ ), the source of the second switch (S₂ ), the drain of the third switch (S₃ ) and the second load One end of (R₂ ) is connected to one point, the other end of the first load (R₁ ), one end of the second inductor (L₂ ) and the other end of the first capacitor (C₁ ) are connected to one point, the second load (R₂ ), the other end of the second inductor (L₂ ), the other end of the second capacitor (C₂ ), and the negative pole of the power supply are connected at one point.