CN112748352A - Power supply control system and method based on sensor - Google Patents
Power supply control system and method based on sensorDownload PDFInfo
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Abstract
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a power supply control system and method based on a sensor.
Background
Power management refers to how power is efficiently distributed to the different components of a system. Power management is critical for mobile devices that rely on battery power. By reducing the energy consumption of the components when idle, an excellent power management system can extend battery life by a factor of two or three. The power management technology is also called as power control technology, belongs to the field of power electronic technology, is an edge crossing technology integrating multiple subjects such as power transformation, modern electronics, network construction, automatic control and the like, and is widely applied to various fields such as industry, energy, traffic, information, aviation, national defense, education, culture and the like.
For a practical electronic system, its power requirements are carefully analyzed. Not only are input voltage, output voltage and current concerns but also the overall power consumption, the efficiency of the power supply implementation, the transient response capability of the power supply parts to load variations, the tolerance range of critical devices to power supply fluctuations and the corresponding allowable power supply ripple, heat dissipation issues, etc. are carefully considered. The power consumption and the efficiency are closely related, the efficiency is high, the total power consumption is low under the condition that the load power consumption is the same, and the reduction of the power budget of the whole system is very beneficial (compared with the LDO and the switching power supply, the efficiency of the switching power supply is higher). It is worth noting that evaluating efficiency not only looks at the efficiency of the power circuit at full load, but also focuses on the level of efficiency at light load.
According to the specific technical indexes obtained by analyzing the system requirements, a proper power supply can be selected to realize the circuit. The weak current part generally comprises an LDO (low dropout regulator) (LDO), a switch power capacitor buck converter and a switch power inductor capacitor converter. In contrast, LDO designs are the easiest to implement, have small output ripple, but have the disadvantages of low efficiency, high heat generation, low current supply compared to switching power supplies, and so on. The switching power supply circuit has flexible design and high efficiency, but has the defects of large ripple, complex realization, complex debugging and the like.
In the prior art, the power supply control is often inaccurate in the fine degree of the power supply, and particularly, after the service time of the battery is longer and longer, the effective electric quantity of the battery is reduced, the accurate power supply control is difficult to realize.
Disclosure of Invention
In view of this, the present invention provides a power control system and method based on sensors, which has the advantages of precise control and high automation degree.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sensor-based power control system, the system comprising: the device comprises a sensor module, a data processing module, a first power supply module, a second power supply module and a third power supply module, a first power supply detection module, a second power supply detection module and a third power supply detection module which are respectively used for detecting parameters of the first power supply module, the second power supply module and the third power supply module, and a control module, a switch module, a motor and a motor control module used for controlling the motor to work, wherein the first power supply detection module is connected with the first power supply module, the second power supply detection module is connected with the second power supply module, and the third power supply detection module is connected with the third power supply module; the control module is respectively connected with the data processing module, the first power supply detection module, the second power supply detection module, the third power supply detection module and the alarm unit; one end of the switch module is respectively connected with the first power supply module, the second power supply module and the third power supply module, and the other end of the switch module is connected with the motor control module; the motor control module is connected with the motor; and the control module compares the voltages between the first power supply module, the second power supply module and the third power supply module according to the data information sent by the data processing module, and controls the power supply module to supply power to the motor.
Further, the sensor module includes: a voltage sensor, a current sensor and a temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively connected with the data processing module through signals; the voltage sensor, the current sensor and the temperature sensor are used for respectively acquiring voltage data, current data and temperature data of the three power supply modules in real time.
Further, the data processing module comprises: an analog-to-digital converter and a data processor; the analog-to-digital converter converts analog data information sent by the voltage sensor, the current sensor and the temperature sensor into digital data information and then sends the digital data information to the data processor; and the data processor calculates the real-time electric quantity of the three power supply modules according to the received digital data information.
Further, the control module compares the voltages of the first power supply module, the second power supply module and the third power supply module; if the voltage difference value between every two power modules is larger than a first threshold value, selecting the power module with larger voltage from the first power module, the second power module and the third power module to supply power for the motor; if the voltage difference value between every two power modules is smaller than a second threshold value, selecting the power module with the smaller voltage from the first power module, the second power module and the third power module to supply power to the motor; and if at least one voltage difference value between every two power supply modules is between the first threshold value and the second threshold value, selecting the power supply module with the voltage value in the middle among the first power supply module, the second power supply module and the third power supply module to supply power to the motor.
Furthermore, the control module compares the voltages between the first power supply module, the second power supply module and the third power supply module according to the electric quantity value result calculated by the data processing module; if the voltage difference values between every two voltage modules are larger than a first threshold value, and the electric quantity values of the three voltage modules are larger than a set warning value, selecting a first power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting a second voltage module to supply power to the motor; and if the voltage difference value between every two voltage modules is smaller than the second threshold value and the electric quantity values of the three voltage modules are larger than the set warning value, selecting the second power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting the third voltage module to supply power to the motor.
A sensor-based power control method, the method performing the steps of:
step 1: a voltage sensor, a current sensor and a temperature sensor in the sensor module respectively acquire voltage data, current data and temperature data of the three power supply modules in real time; sending the collected data to a data processing module; the data processing module calculates the electric quantity of the three power supply modules according to the acquired data and sends the calculated electric quantity to the control module;
step 2: the first power supply detection module, the second power supply detection module and the third power supply detection module respectively collect parameters of the three power supply modules and send the collected parameters to the control module;
and step 3: the control module judges which power supply module is used for supplying power to the motor according to the calculated electric quantity and the acquired parameters;
and 4, step 4: the control module judges whether the electric quantity of the power supply module is sufficient according to the calculated electric quantity, and sends an alarm signal to the alarm unit under the condition that the electric quantity is insufficient.
Furthermore, the alarm unit is an audible and visual alarm unit, the alarm unit is connected with the control unit, and the alarm unit sends out an alarm signal after the control module sends the alarm signal to the alarm unit.
Further, the method for calculating the electric quantity of the three power modules by the data processing unit according to the information collected by the voltage sensor, the current sensor and the temperature sensor comprises the following steps: the real-time voltage value collected by the voltage sensor and the real-time current value collected by the current sensor/the unit time correction coefficient and the temperature value collected by the temperature sensor in real time.
Compared with the prior art, the invention has the following beneficial effects: the temperature data acquired by the temperature sensor is used for correcting the electric quantity obtained by calculating according to the voltage data and the current data acquired in real time, and the corrected data is closer to a true value. Accurate control of the power supply is achieved. The whole control process is automatically realized, and an alarm is given according to the value monitored in real time.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
fig. 1 is a schematic system structure diagram of a sensor-based power control system according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method of controlling a power supply based on a sensor according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 and fig. 2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1
A sensor-based power control system, the system comprising: the device comprises a sensor module, a data processing module, a first power supply module, a second power supply module and a third power supply module, a first power supply detection module, a second power supply detection module and a third power supply detection module which are respectively used for detecting parameters of the first power supply module, the second power supply module and the third power supply module, and a control module, a switch module, a motor and a motor control module used for controlling the motor to work, wherein the first power supply detection module is connected with the first power supply module, the second power supply detection module is connected with the second power supply module, and the third power supply detection module is connected with the third power supply module; the control module is respectively connected with the data processing module, the first power supply detection module, the second power supply detection module, the third power supply detection module and the alarm unit; one end of the switch module is respectively connected with the first power supply module, the second power supply module and the third power supply module, and the other end of the switch module is connected with the motor control module; the motor control module is connected with the motor; and the control module compares the voltages between the first power supply module, the second power supply module and the third power supply module according to the data information sent by the data processing module, and controls the power supply module to supply power to the motor.
Specifically, a switching power supply generally comprises a switching power supply controller and an output part, and some controllers integrate the MOSFET into a chip, so that the use is simpler, the PCB design is simplified, and the design flexibility is reduced.
The switch controller is basically a closed-loop feedback control system, and generally has a sampling circuit for feeding back the output voltage and a control circuit for feeding back the loop. This part is therefore designed to ensure accurate sampling circuitry, control the feedback depth, as the transient response capability is much affected if the feedback loop responds too slowly.
The output part design includes output capacitance, output inductance, and MOSFET, etc., which are selected to satisfy a balance between performance and cost: a high switching frequency allows the use of small inductance values (meaning small package and inexpensive cost), but a higher switching frequency increases interference and increases MOSFET switching losses, reducing efficiency; the opposite is true for the results with a low switching frequency.
The ESR of the output capacitor and Rds _ on parameter selection of the MOSFET are also very critical: choosing a small ESR reduces the output ripple, but the cost of the capacitor increases (good capacitors are expensive). The driving capability of the switching power supply controller is also a need to pay attention to: too many MOSFETs cannot be driven well.
Example 2
On the basis of the above embodiment, the sensor module includes: a voltage sensor, a current sensor and a temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively connected with the data processing module through signals; the voltage sensor, the current sensor and the temperature sensor are used for respectively acquiring voltage data, current data and temperature data of the three power supply modules in real time.
Example 3
On the basis of the above embodiment, the data processing module includes: an analog-to-digital converter and a data processor; the analog-to-digital converter converts analog data information sent by the voltage sensor, the current sensor and the temperature sensor into digital data information and then sends the digital data information to the data processor; and the data processor calculates the real-time electric quantity of the three power supply modules according to the received digital data information.
Example 4
On the basis of the previous embodiment, the control module compares the voltages between every two of the first power supply module, the second power supply module and the third power supply module; if the voltage difference value between every two power modules is larger than a first threshold value, selecting the power module with larger voltage from the first power module, the second power module and the third power module to supply power for the motor; if the voltage difference value between every two power modules is smaller than a second threshold value, selecting the power module with the smaller voltage from the first power module, the second power module and the third power module to supply power to the motor; and if at least one voltage difference value between every two power supply modules is between the first threshold value and the second threshold value, selecting the power supply module with the voltage value in the middle among the first power supply module, the second power supply module and the third power supply module to supply power to the motor.
Specifically, the computer power supply is a closed independent component installed in the mainframe box, and the function of the computer power supply is to convert alternating current into stable direct current of 5V, -5V, +12V, -12V, +3.3V and the like through a switching power supply transformer so as to supply system components such as a system board, a floppy disk, a hard disk drive, various adapter expansion cards and the like in the mainframe box for use. In popular terms, one power supply is broken and the other backup power supply replaces the power supply. The availability of hardware may be enhanced by providing battery backup for nodes and disks. An HP-supported Uninterruptible Power Supply (UPS), such as HP PowerTrust, may provide protection against momentary power loss. The disk and the power supply circuit are connected in such a way that the mirror copies are connected to different power supplies respectively. The root disk and its corresponding node should be powered by the same power circuit. In particular, the cluster lock disk (which acts as an arbiter when reassembling the cluster) should have redundant power supplies, or it can be powered by a power supply other than the nodes in the cluster. The HP represents a device that can provide detailed information about power, disk, and LAN hardware layout aspects of the cluster. Many disk array and other rack-mounted systems currently contain multiple power inputs that are deployed such that different power inputs on the device are connected to separate circuit devices with two or three power inputs, so that the system can generally continue to operate as long as there is no more than one circuit that fails. Thus, if all hardware in a cluster has 2 or 3 power inputs, at least three separate circuits are required to ensure that there is no single point of failure in the circuit design of the cluster. The generator can convert mechanical energy into electric energy, and the dry battery can convert chemical energy into electric energy. The generator and the battery are not electrified, the two poles of the generator and the battery are respectively provided with positive and negative charges, voltage is generated by the positive and negative charges (current is formed by directional movement of the charges under the action of the voltage), the current is generated in a charge conductor by adding the voltage, the positive and negative charges are released to generate the current when the two poles of the battery are connected with the conductor, and the charge is eliminated when the charge is dissipated. Dry cells and the like are called power sources. A device that converts ac power to dc power through a transformer and a rectifier is called a rectified power supply. The electronic device that can provide the signal is called a signal source. The transistor can amplify the signal from the front and transmit the amplified signal to the circuit at the back. The transistor can also be considered as a signal source for the following circuits. Rectified power, the source of the signal, is sometimes also called the power supply.
Example 5
On the basis of the previous embodiment, the control module simultaneously compares the voltages between the first power supply module, the second power supply module and the third power supply module according to the electric quantity value result calculated by the data processing module; if the voltage difference values between every two voltage modules are larger than a first threshold value, and the electric quantity values of the three voltage modules are larger than a set warning value, selecting a first power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting a second voltage module to supply power to the motor; and if the voltage difference value between every two voltage modules is smaller than the second threshold value and the electric quantity values of the three voltage modules are larger than the set warning value, selecting the second power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting the third voltage module to supply power to the motor.
Example 6
A sensor-based power control method, the method performing the steps of:
step 1: a voltage sensor, a current sensor and a temperature sensor in the sensor module respectively acquire voltage data, current data and temperature data of the three power supply modules in real time; sending the collected data to a data processing module; the data processing module calculates the electric quantity of the three power supply modules according to the acquired data and sends the calculated electric quantity to the control module;
step 2: the first power supply detection module, the second power supply detection module and the third power supply detection module respectively collect parameters of the three power supply modules and send the collected parameters to the control module;
and step 3: the control module judges which power supply module is used for supplying power to the motor according to the calculated electric quantity and the acquired parameters;
and 4, step 4: the control module judges whether the electric quantity of the power supply module is sufficient according to the calculated electric quantity, and sends an alarm signal to the alarm unit under the condition that the electric quantity is insufficient.
Example 7
On the basis of the previous embodiment, the alarm unit is an audible and visual alarm unit, the alarm unit is connected with the control unit, and the alarm unit sends out an alarm signal after the control module sends the alarm signal to the alarm unit.
Example 8
On the basis of the previous embodiment, the method for calculating the electric quantity of the three power modules by the data processing unit according to the information collected by the voltage sensor, the current sensor and the temperature sensor comprises the following steps: the real-time voltage value collected by the voltage sensor and the real-time current value collected by the current sensor/the unit time correction coefficient and the temperature value collected by the temperature sensor in real time.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related description of the system described above may refer to the corresponding process in the foregoing method embodiments, and will not be described herein again.
It should be noted that, the system provided in the foregoing embodiment is only illustrated by dividing the functional modules, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not to be construed as unduly limiting the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Those of skill in the art would appreciate that the various illustrative modules, method steps, and modules described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that programs corresponding to the software modules, method steps may be located in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, various illustrative components and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A sensor-based power control system, the system comprising: the device comprises a sensor module, a data processing module, a first power supply module, a second power supply module and a third power supply module, a first power supply detection module, a second power supply detection module and a third power supply detection module which are respectively used for detecting parameters of the first power supply module, the second power supply module and the third power supply module, and a control module, a switch module, a motor and a motor control module used for controlling the motor to work, wherein the first power supply detection module is connected with the first power supply module, the second power supply detection module is connected with the second power supply module, and the third power supply detection module is connected with the third power supply module; the control module is respectively connected with the data processing module, the first power supply detection module, the second power supply detection module, the third power supply detection module and the alarm unit; one end of the switch module is respectively connected with the first power supply module, the second power supply module and the third power supply module, and the other end of the switch module is connected with the motor control module; the motor control module is connected with the motor; and the control module compares the voltages between the first power supply module, the second power supply module and the third power supply module according to the data information sent by the data processing module, and controls the power supply module to supply power to the motor.
2. The system of claim 1, wherein the sensor module comprises: a voltage sensor, a current sensor and a temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively connected with the data processing module through signals; the voltage sensor, the current sensor and the temperature sensor are used for respectively acquiring voltage data, current data and temperature data of the three power supply modules in real time.
3. The system of claim 2, wherein the data processing module comprises: an analog-to-digital converter and a data processor; the analog-to-digital converter converts analog data information sent by the voltage sensor, the current sensor and the temperature sensor into digital data information and then sends the digital data information to the data processor; and the data processor calculates the real-time electric quantity of the three power supply modules according to the received digital data information.
4. The system of claim 3, wherein the control module compares voltages between two of the first power module, the second power module, and the third power module; if the voltage difference value between every two power modules is larger than a first threshold value, selecting the power module with larger voltage from the first power module, the second power module and the third power module to supply power for the motor; if the voltage difference value between every two power modules is smaller than a second threshold value, selecting the power module with the smaller voltage from the first power module, the second power module and the third power module to supply power to the motor; and if at least one voltage difference value between every two power supply modules is between the first threshold value and the second threshold value, selecting the power supply module with the voltage value in the middle among the first power supply module, the second power supply module and the third power supply module to supply power to the motor.
5. The system of claim 3, wherein the control module simultaneously compares voltages between the first power module, the second power module and the third power module based on the calculated electric quantity value result of the data processing module; if the voltage difference values between every two voltage modules are larger than a first threshold value, and the electric quantity values of the three voltage modules are larger than a set warning value, selecting a first power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting a second voltage module to supply power to the motor; and if the voltage difference value between every two voltage modules is smaller than the second threshold value and the electric quantity values of the three voltage modules are larger than the set warning value, selecting the second power module to supply power to the motor, and if the electric quantity values of the three voltage modules are smaller than the set warning value, selecting the third voltage module to supply power to the motor.
6. A method for sensor-based power control based on the system of any one of claims 1 to 5, characterized in that the method performs the following steps:
step 1: a voltage sensor, a current sensor and a temperature sensor in the sensor module respectively acquire voltage data, current data and temperature data of the three power supply modules in real time; sending the collected data to a data processing module; the data processing module calculates the electric quantity of the three power supply modules according to the acquired data and sends the calculated electric quantity to the control module;
step 2: the first power supply detection module, the second power supply detection module and the third power supply detection module respectively collect parameters of the three power supply modules and send the collected parameters to the control module;
and step 3: the control module judges which power supply module is used for supplying power to the motor according to the calculated electric quantity and the acquired parameters;
and 4, step 4: the control module judges whether the electric quantity of the power supply module is sufficient according to the calculated electric quantity, and sends an alarm signal to the alarm unit under the condition that the electric quantity is insufficient.
7. The method as claimed in claim 6, wherein the alarm unit is an audible and visual alarm unit, the alarm unit is connected with the control unit, and the alarm unit sends out an alarm signal after the control module sends the alarm signal to the alarm unit.
8. The method of claim 7, wherein the data processing unit calculates the power of the three power modules according to the information collected by the voltage sensor, the current sensor and the temperature sensor by: the real-time voltage value collected by the voltage sensor and the real-time current value collected by the current sensor/the unit time correction coefficient and the temperature value collected by the temperature sensor in real time.
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