CN111324164A - Program-controlled power supply with battery characteristic simulation function - Google Patents
Program-controlled power supply with battery characteristic simulation function Download PDFInfo
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- CN111324164A CN111324164A CN202010269774.XA CN202010269774A CN111324164A CN 111324164 A CN111324164 A CN 111324164A CN 202010269774 A CN202010269774 A CN 202010269774A CN 111324164 A CN111324164 A CN 111324164A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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Abstract
The invention relates to a program-controlled power supply with a battery characteristic simulation function. The invention comprises a power unit and a control unit; the input end of the power unit is connected with a power grid through an alternating current interface, and the output end of the power unit is connected with electric equipment through a direct current interface; the control unit comprises a control module, a man-machine interface and a signal detection and conditioning module; the control module is connected with the human-computer interface and the signal detection and conditioning module; the signal detection and conditioning module is connected with the power unit and used for sending the output voltage, the output current and the temperature signal of the power unit to the control module. The invention has the function of adjusting the voltage and current output of the common program control power supply, and can also simulate the capacity attenuation characteristic of the battery, can realize the capacity use characteristic simulation of various types and specifications of batteries by leading in a battery model through a man-machine interface, estimates the energy consumption of the program control power supply in any time, and can simulate the battery power supply more truly.
Description
Technical Field
The invention relates to the technical field of program-controlled power supplies, in particular to a program-controlled power supply with a battery characteristic simulation function.
Background
With the rapid development of power electronics, rare earth materials and control technologies, motor drive systems are more and more widely applied. Batteries are one of the main ways to supply energy to motor-driven systems, and are widely used in mobile devices, such as the field of electric vehicles. The batteries are various, such as thermal batteries, zinc-silver batteries, lithium batteries and the like, and can be used for one time or can be charged for multiple times.
In the development process of the motor driving system, a large number of debugging tests are often required, and due to the influences of multiple aspects such as the development period of a battery, the cost and the like, the debugging of the motor driving system is mostly powered by a ground program control power supply. However, the current ground programmable power supply can only set parameters such as output voltage, maximum output current and the like, cannot set battery capacity, and cannot simulate a battery capacity attenuation process. The performance index of the motor driving system measured when the ground programmable power supply supplies power is deviated from the performance index measured when the real battery supplies power, so that the characteristic of the motor driving system when the battery supplies power is difficult to be comprehensively simulated through the ground programmable power supply in the performance debugging process of the motor driving system with high precision requirement.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the programmable power supply with the battery characteristic simulation function, which not only has the voltage and current output adjustable function of the common programmable power supply, but also can simulate the capacity attenuation characteristics of various batteries and can simulate the battery-powered motor driving system test more truly.
The technical scheme adopted by the invention for realizing the purpose is as follows: a program-controlled power supply with a battery characteristic simulation function comprises a power unit and a control unit; the input end of the power unit is connected with a power grid through an alternating current interface, and the output end of the power unit is connected with electric equipment through a direct current interface; the control unit comprises a control module, a man-machine interface and a signal detection and conditioning module; the control module is connected with the human-computer interface and the signal detection and conditioning module; the signal detection and conditioning module is connected with the power unit, and is used for sending output voltage, output current and temperature signals of the power unit to the control module, and is also used for carrying out signal conditioning on an output voltage instruction sent by the control module and sending the output voltage instruction to the power unit; the control module is used for calculating voltage drop generated by battery capacity attenuation and voltage drop of battery internal resistance according to the selected battery model, the output voltage of the power unit and the output current, and obtaining an output voltage instruction by combining the voltage needing to be output.
The power unit comprises a three-phase alternating current socket, a three-phase breaker, a rectifier, a filter, a power supply conversion controller and a power supply output socket which are connected in sequence; the power supply conversion controller is connected with the signal detection conditioning module.
The power supply conversion controller comprises a voltage conversion module and an output current limiting control module; the input end of the voltage conversion module is connected with the filter, and the output end of the voltage conversion module is connected with the output current limiting control module; the output current-limiting control module is connected with a power output socket.
The control module comprises a simulated battery residual capacity estimation module, a voltage instruction generation module, a simulated battery internal resistance voltage drop module and a digital signal processor; the analog battery residual capacity estimation module, the voltage instruction generation module and the analog battery internal resistance voltage drop module are connected with the digital signal processor, and the digital signal processor is used for being connected with the signal detection conditioning module and the human-computer interface.
The simulated battery residual capacity estimation module calculates power output energy within preset working time according to the output voltage and the output current of the power unit, estimates residual capacity according to a selected battery model, and calculates voltage drop generated by battery capacity attenuation according to the characteristics of the battery.
And the voltage instruction generation module subtracts the voltage drop generated by the battery capacity attenuation and the battery internal resistance voltage drop calculated by the battery internal resistance voltage drop simulation module according to the voltage value required to be output and provided by the man-machine interface, and the obtained result is used as an output voltage instruction.
And the voltage drop generated by the battery capacity attenuation is obtained according to the battery model and the energy consumed in the preset working time.
And the simulated battery internal resistance voltage drop module calculates the voltage drop of the simulated battery internal resistance according to the selected battery model and the output current of the power unit.
The invention has the following advantages and beneficial effects:
1. the invention has the function of adjusting the voltage and current output of the common program control power supply, and can also simulate the capacity attenuation characteristic of the battery, can realize the capacity use characteristic simulation of various types and specifications of batteries by leading in a battery model through a man-machine interface, can estimate the energy consumption of the program control power supply in any time, and can simulate the battery power supply more truly.
2. The invention can realize the simulation of the voltage drop of the internal resistance of the battery, the simulation of the internal resistance is realized not by hardware but by a software algorithm, the power consumption can be reduced, the efficiency is improved, the modification is convenient, and the simulation of the internal resistance of various batteries can be realized.
3. The invention adopts a voltage and current double-loop control mode to realize output voltage regulation control and output current limiting control, improves the use safety of the equipment, calculates the voltage drop of the energy consumption corresponding to the simulated battery and the internal resistance voltage drop by the output voltage instruction, and improves the simulation control precision of the voltage at two ends of the electric equipment.
Drawings
Fig. 1 is an overall structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a programmable power supply with a battery characteristic simulation function mainly includes a control unit and a power unit, where the power unit has a 380V ac interface with a power grid, and the power unit has a dc voltage interface with a power load. The control unit comprises a control module, a signal detection and conditioning module, a human-computer interface and the like, wherein the control module mainly comprises a digital signal processor, an analog battery residual capacity estimation module, an analog battery internal resistance voltage drop module, a voltage instruction generation module and the like. The control module and the man-machine interface realize bidirectional communication through a bus, and the control module and the signal detection and conditioning module realize signal interconnection through an analog signal and an I/O interface. The signal detection and conditioning module detects signals such as output voltage, output current and temperature of the power supply conversion controller through the sensor, conditions the signals and sends the signals to the control module, and the signal detection and conditioning module further performs signal conditioning on an output voltage instruction sent by the control module and sends the output voltage instruction to the power supply conversion controller. On one hand, the temperature signal is sent to a man-machine interface for state monitoring, and on the other hand, when the temperature is too high, the output current-limiting control module can turn off the output to protect the programmable power supply. The functions of the simulation battery residual capacity estimation module, the simulation battery internal resistance voltage drop module and the voltage instruction generation module are realized through a software algorithm, and the functions are realized through a digital signal processor; the simulation battery residual capacity estimation module calculates power output energy within a certain period of time according to the collected output voltage and current values, estimates residual capacity (voltage is multiplied by integral of current over time) according to a selected battery model, calculates voltage drop of the battery according to the characteristics of the battery (voltage drop corresponding to attenuation of the battery capacity can be obtained by looking up a table through the battery model), obtains internal resistance voltage drop (current is multiplied by internal resistance) according to the model of the battery and an actually measured current value, subtracts the voltage drop generated by battery capacity attenuation and the voltage drop of the internal resistance of the battery from voltage required to be output provided by a man-machine interface by the voltage instruction generation module, and sends the obtained result as a voltage instruction to the power supply transformation controller.
The power unit mainly comprises a three-phase alternating current socket, a three-phase breaker, a rectifier, a filter, a power supply conversion controller, a power supply output socket and the like, wherein the power supply conversion controller comprises a power supply conversion module and an output current limiting control module. The three-phase 380VAC power grid is connected with a three-phase alternating current socket firstly, the three-phase alternating current socket is connected with a three-phase breaker, the three-phase breaker is connected with a rectifier, the rectifier is connected with a filter, the filter is connected with a power supply transformation controller, the power supply transformation controller is connected with a power supply output socket, and the power supply output socket is connected with electric equipment finally. The power supply conversion controller is used for adjusting according to an output voltage instruction and the maximum output current input by the control unit, the output voltage regulation control is realized in a voltage and current double-loop control mode, a constant voltage control mode is adopted when the output current does not reach a current limiting value, and a constant current control mode is switched when the voltage reaches the current limiting value, so that the use safety of equipment is improved.
Claims (8)
1. A program-controlled power supply with a battery characteristic simulation function is characterized by comprising a power unit and a control unit; the input end of the power unit is connected with a power grid through an alternating current interface, and the output end of the power unit is connected with electric equipment through a direct current interface; the control unit comprises a control module, a man-machine interface and a signal detection and conditioning module; the control module is connected with the human-computer interface and the signal detection and conditioning module; the signal detection and conditioning module is connected with the power unit, and is used for sending output voltage, output current and temperature signals of the power unit to the control module, and is also used for carrying out signal conditioning on an output voltage instruction sent by the control module and sending the output voltage instruction to the power unit; the control module is used for calculating voltage drop generated by battery capacity attenuation and voltage drop of battery internal resistance according to the selected battery model, the output voltage of the power unit and the output current, and obtaining an output voltage instruction by combining the voltage needing to be output.
2. The programmable power supply with battery characteristic simulation function according to claim 1, wherein the power unit comprises a three-phase alternating current socket, a three-phase circuit breaker, a rectifier, a filter, a power conversion controller and a power output socket which are connected in sequence; the power supply conversion controller is connected with the signal detection conditioning module.
3. The programmable power supply with battery characteristic simulation function of claim 2, wherein the power conversion controller comprises a voltage conversion module and an output current limit control module; the input end of the voltage conversion module is connected with the filter, and the output end of the voltage conversion module is connected with the output current limiting control module; the output current-limiting control module is connected with a power output socket.
4. The programmable power supply with the battery characteristic simulation function according to claim 1, wherein the control module comprises an analog battery residual capacity estimation module, a voltage instruction generation module, an analog battery internal resistance voltage drop module and a digital signal processor; the analog battery residual capacity estimation module, the voltage instruction generation module and the analog battery internal resistance voltage drop module are connected with the digital signal processor, and the digital signal processor is used for being connected with the signal detection conditioning module and the human-computer interface.
5. The programmable power supply according to claim 4, wherein the simulated battery remaining capacity estimation module calculates power output energy within a preset operating time according to the output voltage and output current of the power unit, estimates remaining capacity according to a selected battery model, and calculates a voltage drop caused by battery capacity fading according to the characteristics of the battery.
6. The programmable power supply with the battery characteristic simulation function according to claim 4, wherein the voltage command generation module subtracts a voltage drop generated by battery capacity attenuation and a battery internal resistance voltage drop calculated by the battery internal resistance voltage drop simulation module according to the voltage value required to be output and provided by the human-computer interface, and the obtained result is used as the output voltage command.
7. The programmable power supply with battery characteristic simulation function of claim 6, wherein the voltage drop generated by the battery capacity fading is obtained according to the battery model and the energy consumed in the preset operation time.
8. The programmable power supply with battery characteristic simulation function of claim 4, wherein the module for simulating voltage drop of internal resistance of battery calculates voltage drop of internal resistance of battery according to selected battery model and output current of the power unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010269774.XA CN111324164A (en) | 2020-04-08 | 2020-04-08 | Program-controlled power supply with battery characteristic simulation function |
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| CN202010269774.XA CN111324164A (en) | 2020-04-08 | 2020-04-08 | Program-controlled power supply with battery characteristic simulation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816809A (en) * | 2020-12-29 | 2021-05-18 | 中通客车控股股份有限公司 | Power battery simulation system and method for whole vehicle working condition test |
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- 2020-04-08 CN CN202010269774.XA patent/CN111324164A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816809A (en) * | 2020-12-29 | 2021-05-18 | 中通客车控股股份有限公司 | Power battery simulation system and method for whole vehicle working condition test |
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