CN116073667A - Power integration system capable of switching power supply mode and electronic load mode and switching method thereof - Google Patents

Power integration system capable of switching power supply mode and electronic load mode and switching method thereof Download PDF

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Publication number
CN116073667A
CN116073667A CN202111295349.9A CN202111295349A CN116073667A CN 116073667 A CN116073667 A CN 116073667A CN 202111295349 A CN202111295349 A CN 202111295349A CN 116073667 A CN116073667 A CN 116073667A
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China
Prior art keywords
power
microprocessor
voltage
power component
current
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CN202111295349.9A
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Chinese (zh)
Inventor
李政聪
苏嗣杰
陈文智
林志兴
龚振玮
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Chroma ATE Suzhou Co Ltd
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Chroma ATE Suzhou Co Ltd
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Priority to CN202111295349.9A priority Critical patent/CN116073667A/en
Publication of CN116073667A publication Critical patent/CN116073667A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • 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
    • G01R31/40—Testing power supplies
    • 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
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention relates to a power integration system capable of switching a power supply mode and an electronic load mode and a switching method thereof, wherein when switching from the power supply mode to the electronic load mode, the system mainly comprises the following steps: after the microprocessor controls and stops the operation of the power component, the current control module and the phase-locked loop are started to acquire the voltage phase of the power-class to-be-tested piece, and after the current control module calculates the conduction quantity of the power component according to the current set value and the voltage phase, the power component generates a pulling load current for the power-class to-be-tested piece; in addition, when the electronic load mode is switched to the power supply mode, the voltage control module is started after the operation of the power component is stopped, and after the voltage control module calculates the conduction quantity of the power component by using the voltage set value, the power component inputs corresponding voltage to the power-type to-be-detected piece.

Description

Power integration system capable of switching power supply mode and electronic load mode and switching method thereof
Technical Field
The present invention relates to a power integration system capable of switching between a power supply mode and an electronic load mode and a switching method thereof, and more particularly to a power integration system integrating an ac/dc power supply mode and an ac/dc electronic load mode, which can perform mode switching without shutdown.
Background
In the field of electronic device testing, ac/dc power supplies and ac/dc electronic loaders have been playing a very important role; the AC/DC power supply simply supplies stable power to the electronic device to be tested, and the AC/DC electronic load is equipment for simulating the energy consumption state so as to simulate the power consumption environment. However, in the prior art, these two devices are mostly independent electronic machines, and there are few electronic machines integrating these two functions, because one of them is supplying power and the other is consuming power, which is an electronic machine belonging to the complete reverse function. In addition, the reason why the existing ac/dc power supply and the ac/dc electronic load cannot be integrated is that the two control modes are different from each other, which results in that the two control modes cannot be shared in hardware design.
Through investigation, taiwan patent literature discloses 201434228 "a power conversion system with a power supply and an electronic load", which discloses a power conversion system combining the power supply and the electronic load; however, the technology of this patent uses two power converters as a power supply and an electronic load, respectively. More simply, the above patent document combines two independent components, such as a power supply and an electronic load, which are independently operated, and the components shared by the two components are very few, which is difficult to be substantially integrated. Furthermore, the main technical main shaft of the above patent document is that when the electronic load function is used, electric energy is recovered as source power of the power supply, and the mode switching method thereof is not disclosed in detail.
Therefore, the power supply and the electronic load can be integrated in the same electronic device, so that the sharing of hardware components can be realized, and the two completely different functions of the power supply integration system can be switched by a digital control switching mode under the condition of not shutting down, thereby being suitable for Yan Qipan in the industry and the public.
Disclosure of Invention
The present invention provides a power integration system capable of switching between a power supply mode and an electronic load mode and a switching method thereof, which can achieve the goal of sharing the same body between an ac/dc power supply and an ac/dc electronic load, i.e. sharing hardware components, thereby achieving substantial integration.
The other main purpose of the present invention is to realize the switching between the AC/DC power supply mode and the AC/DC electronic load mode in the non-power-off state, which is performed completely through digital control mode without any hardware replacement or adjustment.
In order to achieve the above objective, the present invention provides a power integration system capable of switching between a power supply mode and an electronic load mode, which mainly comprises an AC/DC conversion module, a DC/DC conversion module and a DC/AC conversion module; the AC/DC conversion module is used for being electrically coupled to an external power supply, the DC/DC conversion module is electrically connected to the AC/DC conversion module, and the DC/AC conversion module is electrically connected to the DC/DC conversion module and is used for being electrically coupled to a power supply type part to be tested; in addition, the DC/AC conversion module may include a microprocessor, a power component driving circuit, a voltage sensing circuit, and a current sensing circuit; the power assembly driving circuit is electrically coupled to the microprocessor and the power assembly and is used for controlling the driving of the power assembly; the power component is electrically coupled to the power class to-be-tested piece; the voltage sensing circuit and the current sensing circuit are electrically coupled between the power component and the power class piece to be tested; when the power supply mode is in, the microprocessor controls the power assembly driving circuit according to the voltage set value, so that the power assembly inputs corresponding voltage to the power type to-be-tested piece, and the voltage sensing circuit and the current sensing circuit respectively monitor and feed back the output voltage value and the output current value output to the power type to-be-tested piece to the microprocessor; when the electronic load mode is in, the microprocessor controls the voltage sensing circuit to detect the input voltage value input by the power supply type to-be-tested piece, the microprocessor obtains the voltage phase according to the input voltage value, and the microprocessor controls the power component driving circuit according to the current set value and the voltage phase, so that the power component generates load current for the power supply type to-be-tested piece.
Therefore, the invention can realize that the AC/DC power supply and the AC/DC electronic load are integrated in the same system, and realize the aim that the two functional devices share the same machine body, and most of hardware components in the system are shared when the two functions are executed respectively; the invention only carries out the two functions and the switching between the two functions in a digital control mode, and is an integrated power supply device with a brand new type.
In order to achieve the above objective, the present invention provides a method for switching between a power supply mode and an electronic load mode of a power integration system, wherein the power integration system mainly includes a DC/AC conversion module electrically coupled to a power class device to be tested, the DC/AC conversion module includes a microprocessor and a power component, and the microprocessor mainly includes a voltage control module, a current control module and a phase-locked loop. The method mainly comprises the following steps when switching from a power supply mode to an electronic load mode: firstly, the microprocessor controls the operation of the power component to be stopped; then, starting the current control module; furthermore, the microprocessor controls and starts the phase-locked loop and acquires the voltage phase of the power supply type to-be-detected piece; the current control module calculates the flux of the power component according to the current set value and the voltage phase; finally, the microprocessor enables the power assembly to generate pulling load current for the power-type to-be-tested piece; the method mainly comprises the following steps when switching from an electronic load mode to a power supply mode: firstly, the microprocessor controls the operation of the power component to be stopped; then, starting the voltage control module; furthermore, the voltage control module calculates the flux of the power component according to the voltage set value; finally, the microprocessor controls the power assembly to input corresponding voltage to the power-type to-be-tested piece.
Therefore, the invention can switch between the power supply mode and the electronic load mode only by a digital control mode, does not need to change hardware or manually reset the setting on the hardware, can switch only by a user operating a user interface, has quite simple and quick switching process, and does not need to restart or reset the equipment. In addition, the invention can respectively carry out compensation operation of current and voltage through the current control module and the voltage control module in the microprocessor, thereby enabling the power component to output accurate corresponding voltage in a power supply mode and enabling the power component to generate accurate pulling load current for the power type to-be-tested piece in an electronic load mode.
Drawings
Fig. 1 is a system block diagram of a preferred embodiment of the present invention.
Fig. 2 is a system block diagram of a power supply mode of the preferred embodiment of the present invention.
Fig. 3 is a system block diagram of an electronic load mode of a preferred embodiment of the present invention.
Fig. 4 is a flow chart of the preferred embodiment of the present invention for switching from the electronic load mode to the power supply mode.
Fig. 5 is a flow chart of the preferred embodiment of the present invention for switching from the power supply mode to the electronic load mode.
Detailed Description
Before the present invention is described in detail in this embodiment, it should be noted that similar components will be denoted by the same reference numerals in the following description. Furthermore, the figures of the present invention are merely schematic illustrations that are not necessarily to scale, and all details are not necessarily presented in the figures.
Referring to fig. 1, a system block diagram of a power integration system capable of switching between a power supply mode and an electronic load mode according to a preferred embodiment of the present invention is shown; the main components of the power integration system of the present embodiment and the connection relationship between the components and external components are shown. Further, the power integration system 1 of the present embodiment mainly includes an AC/DC conversion module 2, a DC/DC conversion module 3, and a DC/AC conversion module 4; the AC/DC conversion module 2 at the input end is electrically coupled to an external power source Po, and the external power source Po may be a single-phase or three-phase AC power supply, and the AC/DC conversion module 2 of the present embodiment is an AC-to-DC power conversion module with active power factor correction (Power Factor Correction, PFC).
On the other hand, the DC/DC conversion module 3 of the present embodiment is electrically coupled between the AC/DC conversion module 2 and the DC/AC conversion module 4, and the DC/DC conversion module 3 of the present embodiment is a DC isolation transformer capable of increasing and decreasing voltage. In addition, the DC/AC conversion module 4 at the output end is the main shaft of the present embodiment, and is used for being electrically coupled to the power source type to-be-tested piece Ot; the power supply type test piece Ot may be a load type test piece or a power supply type test piece.
Furthermore, please refer to fig. 2, which is a system block diagram of the power supply mode according to the preferred embodiment of the present invention. The following describes the hardware architecture and operation description of the present embodiment in the power supply mode; as shown in the figure, the hardware configuration of the DC/AC conversion module 4 in the power supply mode mainly includes a microprocessor 40, a power component 41, a power component driving circuit 42, a voltage sensing circuit 43, a current sensing circuit 44, a switching module 5, a current signal amplifying circuit 46, a voltage signal amplifying circuit 45, and a plurality of passive components and a direct current bus. In addition, the microprocessor 40 further includes three main functional modules, i.e., a voltage control module 401, a current control module 402, and a phase-locked loop 403.
The power device driving circuit 42 is electrically coupled to the microprocessor 40 and the power device 41, the power device 41 is electrically coupled to the power device to be tested Ot, and the voltage sensing circuit 43, the current sensing circuit 44 and the switch device 5 are electrically coupled between the power device 41 and the power device to be tested Ot. The switch module 5 in this embodiment is a Relay (Relay), which is turned on under the control of the microprocessor 40, and then the DC/AC conversion module 4 is turned on to the power-class object to be tested Ot, or turned off under the control of the microprocessor 40, so that an open circuit is formed between the DC/AC conversion module 4 and the power-class object to be tested Ot.
In addition, the current signal amplifying circuit 46 is electrically coupled between the current sensing circuit 44 and the microprocessor 40, and is used for amplifying a current measurement signal for the microprocessor 40, wherein the current measurement signal can be, for example, an output current value output to the power class test piece Ot in the power supply mode or an input current value input by the power class test piece Ot in the electronic load mode. In addition, the voltage signal amplifying circuit 45 is electrically coupled between the voltage sensing circuit 43 and the microprocessor 40, and is used for amplifying a voltage measurement signal for the microprocessor 40, wherein the voltage measurement signal can be, for example, an output voltage value output to the power class test piece Ot in the power supply mode or an input voltage value input by the power class test piece Ot in the electronic load mode.
The operation of the power supply mode of the present embodiment is described below, please continue to refer to fig. 2, and the microprocessor 40 controls the power device driving circuit 42 according to the voltage set value Vu input in advance by the user, so that the power device 41 inputs the corresponding voltage to the power class object Ot. Further, the voltage control module 401 is utilized to perform function operation and steady-state error compensation on the voltage set point Vu, so that the conducting rate of the power component 41, that is, the Duty Ratio (Duty Ratio) of the semiconductor switch component, can be obtained, and a voltage control signal in a PWM (Pulse-width modulation) mode can be outputted to the power component driving circuit 42, so as to drive the power component 41 to input a corresponding voltage equivalent to the voltage set point Vu to the power class object Ot.
Meanwhile, during the operation of the power supply mode, the voltage sensing circuit 43 and the current sensing circuit 44 respectively monitor the output voltage value and the output current value input to the power class test piece Ot in real time and feed back to the microprocessor 40, and once the detected output voltage value and output current value have errors with the set value, the microprocessor 40 can adjust in real time to eliminate the errors.
Additionally, please refer to fig. 3, which is a block diagram of the system in the electronic load mode according to the preferred embodiment of the present invention. The following describes the hardware architecture and operation description of the present embodiment in the electronic load mode. As shown in the figure, the hardware architecture of the present embodiment in the electronic load mode is almost identical to that in the power supply mode, and the difference is only different from the functional modules operating inside the microprocessor 40, wherein the power supply mode uses the voltage control module 401 to perform the operation and processing, and the electronic load mode uses the current control module 402 and the phase-locked loop 403 to perform the operation and processing. Therefore, in the power integration system provided by the embodiment, the electronic load mode and the power supply mode share almost all hardware components, that is, achieve the goal of sharing the same body, and integrate perfectly.
The operation of the electronic load mode of this embodiment is described below, please continue to refer to fig. 3; the microprocessor 40 controls the voltage sensing circuit 43 to detect the input voltage value inputted by the power class test piece Ot, the microprocessor 40 can obtain the voltage phase according to the input voltage value, and the microprocessor 40 controls the power component driving circuit 42 according to the current set value Au preset by the user and the voltage phase, so that the power component 41 generates the pulling current to the power class test piece Ot.
Further, the Voltage sensing circuit 43 detects the input Voltage value of the power source type object Ot in real time and feeds back the input Voltage value to the microprocessor 40, and the pll 403 in the microprocessor 40 has components such as a Phase Detector (Phase Detector), a Loop Filter (Loop Filter) and a Voltage-controlled oscillator (Voltage-controlled oscillator), so that the Voltage Phase can be obtained by calculation immediately after the input Voltage value enters the pll 403.
At this time, the current control module 402 can obtain the conducting amount of the power device, that is, the Duty Ratio (Duty Ratio) of the semiconductor switch device according to the current set value Au and the voltage phase through function calculation and steady-state error compensation, and then control the power device driving circuit 42 by outputting the current control signal, and the power device driving circuit 42 outputs the matching voltage Vp to the power device 41, so as to drive the power device 41 to generate the pull-load current for the power type to-be-tested device Ot; the pull-load current is substantially equal to the current set point Au; the current control signal is also a PWM type current control signal.
Similarly, in the electronic load mode operation, the voltage sensing circuit 43 and the current sensing circuit 44 respectively monitor the input voltage and the input current of the power class to-be-detected component Ot in real time and feed back the input voltage and the input current to the microprocessor 40, and the microprocessor 40 obtains the voltage phase according to the input voltage on the one hand, so as to regulate the power component 41, and on the other hand, the microprocessor 40 determines whether to start the protection mechanism according to the input voltage and the input current, and once the detected input voltage value or input current value varies greatly, the microprocessor 40 can process in real time to avoid the system failure.
Referring to FIG. 4, a flow chart of switching from the electronic load mode to the power supply mode according to the preferred embodiment of the invention is shown; as shown in the figure, first, the user performs a switching action through a human-machine interface, which may be through a physical button, a screen touch, or through a computer to perform switching with a mouse-keyboard, that is, step S100. Next, step S110 is performed, wherein the microprocessor 40 stops outputting the current control signal to the power device driving circuit 42; furthermore, the microprocessor 40 further determines whether the current control signal stops outputting, i.e. step S120; if the output has not been stopped, the process returns to step S110, and the microprocessor 40 continues to stop the output of the signal.
In addition, if the current control signal has been stopped, the microprocessor 40 controls to turn off the switching module 5, that is, to cause the DC/AC conversion module 4 to form an open circuit with the power class object Ot, i.e., step S130; next, the microprocessor 40 waits 200 ms to ensure complete disconnection, S140. Furthermore, the system Flag (Flag) command informs the microprocessor 40 to switch from the current control module 402 to the voltage control module 401, which is to cancel the (disable) current control module 402 and activate the (enable) voltage control module 401, step S150. At the same time, the microprocessor 40 resets the internally registered measurement values and parameter set values, i.e. clears the internally registered set values and related parameters of the microprocessor 40, which is step S150.
Then, the user can input the voltage set value Vu, namely the voltage value to be output in the power supply mode, through the human-computer interface; the voltage control module 410 calculates the conductance of the power device 41 according to the voltage set point Vu, that is, the voltage control module 410 calculates the Duty Ratio (Duty Ratio) of each switch device in the power device 41 through function operation and steady-state error compensation, which is step S170. Finally, in step S180, the microprocessor 40 outputs a corresponding voltage control signal to the power device driving circuit 42 according to the value calculated in the previous step, and the power device driving circuit 42 drives the power device 41 accordingly, and the DC/AC conversion module 4 can input a corresponding voltage equivalent to the voltage set value Vu to the power type part to be tested Ot.
Referring to FIG. 5, a flow chart of switching from a power supply mode to an electronic load mode according to a preferred embodiment of the invention is shown; as shown in the figure, first, the user performs a switching operation through the human-machine interface as well, i.e., step S200. Next, step S210, the microprocessor 40 stops the voltage control signal input to the power component driving circuit 42; also, the microprocessor 40 will also further determine whether the output of the voltage control signal has stopped, i.e. step S220; if the output has not been stopped, the process returns to step S210, and the microprocessor 40 continues control to stop the output of the signal.
Further, if it is determined by the microprocessor 40 that the output of the voltage control signal has stopped, step S230 is proceeded to, and the system Flag (Flag) command informs the microprocessor 40 to switch from the voltage control module 401 to the current control module 402, which is to cancel the (disable) voltage control module 401 and start the (enable) current control module 402. At the same time, the microprocessor 40 resets the internal temporarily stored measurement values and parameter set values, i.e. clears the internal temporarily stored set values and related parameters, which is step S240. Next, step S250 is performed, where the microprocessor 40 controls the on-switch module 5 to enable the DC/AC conversion module 4 to be turned on to the power class test piece Ot.
After the switch module 5 is turned on, the microprocessor 40 receives the input voltage value detected by the voltage sensing circuit 43 in real time, and starts the phase-locked loop 403 to process the input voltage value to obtain a voltage phase, which is step S260. Meanwhile, the system receives a current set value Au input by a user, namely a pulling current in an electronic load mode. Then, the current control module 402 can calculate the conductance of the power device 41, that is, the duty cycle of each switch device in the power device 41, according to the voltage phase and the current set value Au obtained by the phase-locked loop 403, through function operation and steady-state error compensation, that is, step S270. Finally, the microprocessor 40 outputs a PWM-type current control signal to the power device driving circuit 42 according to the conduction amount, and the power device driving circuit 42 correspondingly outputs a matching voltage Vp to the power device 41, so that the power device 41 generates the pull-load current.
As can be seen from the above switching process, the present embodiment can realize the switching between the ac/dc power supply mode and the ac/dc electronic load mode in a state of not shutting down, which is completely switched by a digital control manner; more importantly, in the mode switching process, the user can switch by only operating the man-machine interface without changing any hardware configuration, so that the method is quite simple and convenient for the user.
The above-described embodiments are provided for convenience of explanation only, and the scope of the invention claimed should be construed as limited only by the claims.
Description of the reference numerals
1 Power integration system
2:AC/DC conversion module
3:DC/DC conversion module
4 DC/AC conversion module
5 switch module
40 microprocessor
41 Power component
42 Power component drive Circuit
43 voltage sensing circuit
44 current sensing circuit
45 Voltage signal amplifying circuit
46 current signal amplifying circuit
401 Voltage control Module
402 current control module
403 phase locked loop
Au: current set point
Ot, power supply type part to be measured
Po external power supply
Vu voltage set point
Vp: matching voltage.

Claims (10)

1. A power integration system capable of switching between a power supply mode and an electronic load mode, comprising:
an AC/DC conversion module for electrically coupling to an external power source;
a DC/DC conversion module electrically connected to the AC/DC conversion module; and
the DC/AC conversion module is electrically connected to the DC/DC conversion module and is used for being electrically coupled to the power supply type to-be-tested piece;
the DC/AC conversion module comprises a microprocessor, a power component driving circuit, a voltage sensing circuit and a current sensing circuit; the power component driving circuit is electrically coupled to the microprocessor and the power component and is controlled to drive the power component; the power component is electrically coupled to the power class part to be tested; the voltage sensing circuit and the current sensing circuit are electrically coupled between the power component and the power class part to be tested;
when the power supply mode is in, the microprocessor controls the power component driving circuit according to a voltage set value, so that the power component inputs corresponding voltage to the power class piece to be tested, and the voltage sensing circuit and the current sensing circuit respectively monitor and feed back an output voltage value and an output current value which are output to the power class piece to be tested to the microprocessor;
when the electronic load mode is in, the microprocessor controls the voltage sensing circuit to detect an input voltage value input by the power supply type to-be-detected piece, the microprocessor obtains a voltage phase according to the input voltage value, and the microprocessor controls the power component driving circuit according to a current set value and the voltage phase to enable the power component to generate a pulling load current for the power supply type to-be-detected piece.
2. The power integration system of switchable power supply mode and electronic load mode according to claim 1, wherein the microprocessor comprises a voltage control module; when in the power supply mode, the voltage control module calculates the conduction quantity of the power component according to the voltage set value and outputs a voltage control signal to the power component driving circuit so as to control the power component to output the corresponding voltage.
3. The power integration system of switchable power supply mode and electronic load mode according to claim 2, wherein the microprocessor further comprises a current control module and a phase locked loop; when the microprocessor is in the electronic load mode, the microprocessor obtains the voltage phase through the phase-locked loop, calculates the conduction quantity of the power component through the current control module according to the current set value and the voltage phase, and outputs a current control signal to the power component driving circuit so that the power component driving circuit outputs a matching voltage to the power component, and the power component generates the pull-load current.
4. The power integration system of claim 3, further comprising a switch module electrically coupled between the DC/AC conversion module and the power class device under test; the microprocessor controls to turn on the switch module to conduct the DC/AC conversion module to the power class piece to be tested, or turns off the switch module to form an open circuit between the DC/AC conversion module and the power class piece to be tested.
5. The power integration system of claim 4, wherein the microprocessor turns off the power device via the power device driving circuit when switching from the power supply mode to the electronic load mode; the microprocessor starts the current control module and controls the switch module to be started, and the phase-locked loop of the microprocessor starts and calculates to acquire the voltage phase; the current control module calculates the conduction quantity of the power component according to the current set value and the voltage phase, and the microprocessor enables the power component to generate the pulling load current for the power component type to-be-tested piece through the power component driving circuit.
6. The power integration system of claim 4, wherein the microprocessor turns off the power device via the power device driving circuit when switching from the electronic load mode to the power supply mode; the microprocessor controls the switch module to be closed and starts the voltage control module after waiting for a specific time; the voltage control module calculates the conduction quantity of the power component according to the voltage set value, and the microprocessor enables the power component to input the corresponding voltage to the power class to-be-tested piece through the power component driving circuit.
7. The power integration system of claim 3, further comprising a current signal amplifying circuit electrically coupled between the current sensing circuit and the microprocessor, and a voltage signal amplifying circuit electrically coupled between the voltage sensing circuit and the microprocessor.
8. The switching method of the power supply mode and the electronic load mode of the power integration system comprises a DC/AC conversion module, wherein the DC/AC conversion module is electrically coupled to a power class piece to be tested and comprises a microprocessor and a power component, and the microprocessor comprises a voltage control module, a current control module and a phase-locked loop;
wherein, when switching from the power supply mode to the electronic load mode, the method comprises the following steps:
(A1) The microprocessor controls the operation of the power component to stop;
(A2) Starting the current control module;
(A3) The microprocessor controls and starts the phase-locked loop and obtains the voltage phase of the power supply type to-be-tested piece;
(A4) The current control module calculates the conduction quantity of the power component according to the current set value and the voltage phase; and
(A5) The microprocessor enables the power component to generate pulling load current for the power class to-be-tested piece;
wherein when switching from the electronic load mode to the power supply mode, the method comprises the following steps:
(B1) The microprocessor controls the operation of the power component to stop;
(B2) Starting the voltage control module;
(B3) The voltage control module calculates the conduction quantity of the power component according to a voltage set value; and
(B4) The microprocessor controls the power component to input corresponding voltage to the power class to-be-tested piece.
9. The method of switching between a power supply mode and an electronic load mode of the power integration system of claim 8, wherein the DC/AC conversion module further comprises a power device driving circuit electrically coupled between the microprocessor and the power device; after stopping the control signal input to the power device driving circuit in the step (A1) and the step (B1), the microprocessor further judges whether the control signal input to the power device driving circuit is stopped, if not, the step (A1) and the step (B1) are continued, and if so, the step (A2) and the step (B2) are executed; in step (A5), the microprocessor outputs a current control signal to the power component driving circuit according to the conduction amount obtained in step (A4) so as to drive the power component to generate the load current for the power class part to be tested; in step (B4), the microprocessor outputs a voltage control signal to the power device driving circuit according to the throughput obtained in step (B3) to drive the power device to input the corresponding voltage to the power device to be tested.
10. The method for switching between a power supply mode and an electronic load mode of a power integration system according to claim 8, wherein the power integration system further comprises a switch module electrically coupled between the DC/AC conversion module and the power class test piece, the switch module being controlled to be turned on to allow the DC/AC conversion module to be turned on to the power class test piece, the switch module being controlled to be turned off to allow an open circuit to be formed between the DC/AC conversion module and the power class test piece; in the step (A2), after the current control module is started and all temporary storage parameters in the microprocessor are cleared, the microprocessor controls the switch module to be turned on; in the step (B2), the microprocessor controls to turn off the switch module and wait for a specific time, then starts the voltage control module, and the microprocessor clears all temporary storage parameters.
CN202111295349.9A 2021-11-03 2021-11-03 Power integration system capable of switching power supply mode and electronic load mode and switching method thereof Pending CN116073667A (en)

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Application Number Priority Date Filing Date Title
CN202111295349.9A CN116073667A (en) 2021-11-03 2021-11-03 Power integration system capable of switching power supply mode and electronic load mode and switching method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111295349.9A CN116073667A (en) 2021-11-03 2021-11-03 Power integration system capable of switching power supply mode and electronic load mode and switching method thereof

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CN116073667A true CN116073667A (en) 2023-05-05

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