CN210109284U - Alternating current electronic load module for inverter power supply aging test and aging test system - Google Patents
Alternating current electronic load module for inverter power supply aging test and aging test system Download PDFInfo
- Publication number
- CN210109284U CN210109284U CN201920789672.3U CN201920789672U CN210109284U CN 210109284 U CN210109284 U CN 210109284U CN 201920789672 U CN201920789672 U CN 201920789672U CN 210109284 U CN210109284 U CN 210109284U
- Authority
- CN
- China
- Prior art keywords
- alternating current
- power supply
- circuit
- electronic load
- aging test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000032683 aging Effects 0.000 title claims abstract description 43
- 238000005070 sampling Methods 0.000 claims abstract description 42
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000001360 synchronised effect Effects 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 19
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000002431 foraging effect Effects 0.000 claims description 6
- 238000012937 correction Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The alternating current electronic load module for the inverter power supply aging test comprises an alternating current load unit, an energy feedback unit and a control unit for driving the alternating current load unit and the energy feedback unit, wherein the alternating current load unit consists of an alternating current input port, a first voltage sampling circuit, a phase detection circuit, a current sampling circuit, a first driving circuit and a bridgeless PFC, and the energy feedback unit consists of a second voltage sampling circuit, a second driving circuit, an LLC resonant converter, an isolation driving circuit, a voltage feedback circuit and a direct current output port. The invention ensures that the direct current power supply only needs to supplement the loss part generated by the self conversion efficiency of the inverter power supply and the energy-saving alternating current electronic load module after the system works, thereby not only saving electric energy, but also greatly reducing the investment of matched equipment and reducing the test cost.
Description
Technical Field
The invention relates to the field of power supply aging tests, in particular to an alternating current electronic load module and an aging test system for an inverter power supply aging test, which are applied to an inverter power supply for converting direct current into alternating current for aging test, such as a vehicle-mounted inverter, a marine inverter, an energy storage inverter, a photovoltaic inverter, a portable mobile alternating current power supply and the like.
Background
In order to check and improve the reliability, stability and safety of inverter power supply (also called inverter) products, the aging test of the inverter power supply becomes an important link in the production process flow of the products. The aging is to simulate a long-time full load test of the power supply product under a high-temperature severe condition so as to simulate the severe condition which can occur in practical use to check the performance of the product.
The traditional inverter power aging test equipment mainly comprises pure resistive dummy loads such as bulbs, high-power resistors or heating wires. The traditional solution for the aging of the inverter power supply is shown in fig. 1, a high-power dc power supply provides dc input for the inverter power supply, and a bulb or a resistor is used as an ac load of the inverter power supply to convert ac power output by the inverter power supply into heat energy for consumption. Because the power of a single inverter power supply is usually in the range of 50W to 5kW, or even larger, a large amount of electric energy needs to be consumed in the aging process, and the traditional inverter power supply aging test solution has the following disadvantages:
1) the energy consumption is 100%, and the product testing cost is greatly increased;
2) the test process cannot be monitored, no data is recorded, and quality tracking cannot be carried out;
3) a large number of high-power direct-current power supplies are needed to supply power for the inverter power supply;
4) the bulb emits light and heats, so that the workshop environment becomes severe and the body of a tester is injured;
5) high temperature and high heat have fire hazard.
Disclosure of Invention
The invention provides an alternating current electronic load module for inverter power supply aging test and an aging test system for solving the problems in the prior art.
In order to achieve the above object, the present invention provides an ac electronic load module for inverter power aging test, including an ac load unit, an energy feedback unit, and a control unit for driving the ac load unit and the energy feedback unit, wherein:
the alternating current load unit consists of an alternating current input port, a first voltage sampling circuit, a phase detection circuit, a current sampling circuit, a first driving circuit and a bridgeless PFC (power factor correction), wherein the input end of the bridgeless PFC is connected with the alternating current input port, the control unit is respectively connected with the first voltage sampling circuit, the current sampling circuit and the phase detection circuit so as to sample the voltage, the current and the phase of alternating current input by the alternating current input port, and the control unit is connected with the first driving circuit so as to drive the bridgeless PFC to work;
the energy feedback unit is composed of a second voltage sampling circuit, a second driving circuit, an LLC resonant converter, an isolation driving circuit, a voltage feedback circuit and a direct current output port, wherein the input end of the LLC resonant converter is connected with the output end of the bridgeless PFC, the direct current output port is connected with the output end of the LLC resonant converter, the control unit is connected with the second voltage sampling circuit to acquire the voltage at the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to acquire the voltage at the direct current output port, and the control unit is respectively connected with the second driving circuit and the isolation driving circuit to drive the LLC resonant converter to work.
As a further preferable technical solution of the present invention, the bridgeless PFC includes a switching tube Q1, a switching tube Q2, a rectifying diode D1, a rectifying diode D2, and an energy storage capacitor E1, cathodes of the rectifying diodes D1 and D2 are connected to form a first rectifying output line connected to an ac input port, sources of the switching tubes Q1 and Q2 are connected to form a second rectifying output line connected to the ac input port, the energy storage capacitor E1 is connected between the first and second rectifying output lines, an anode of the rectifying diode D1 and a drain of the switching tube Q1 are connected to form a first ac input line, an anode of the rectifying diode D2 and a drain of the switching tube Q2 are connected to form a second ac input line, and the first driving circuit is connected to gates of the switching tubes Q1 and Q2, respectively.
As a further preferable technical solution of the present invention, an EMI filter is further connected between the input terminal of the bridgeless PFC and the ac input port, an inductor L1 is connected in series in a line connecting the first ac input line and the EMI filter, and a current sampling resistor R1 is connected in series in a line connecting the second ac input line and the EMI filter.
As a further preferable embodiment of the present invention, the first voltage sampling circuit is connected to an input terminal of the EMI filter, the phase detection circuit is connected to the first voltage sampling circuit, and the current sampling circuit is connected to both ends of the current sampling resistor R1.
As a further preferable embodiment of the present invention, the LLC resonant converter is composed of a switching tube Q3, a switching tube Q4, a synchronous rectifier Q5, a synchronous rectifier Q6, a resonant inductor L2, a resonant capacitor C3, and a transformer T1, a drain of the switching tube Q3 is connected to a first rectification output line, a source of the switching tube Q4 is connected to a second rectification output line, the transformer T1 has a primary winding and a secondary winding, a source of the switching tube Q3 is connected to a drain of the switching tube Q4 and then connected to one end of the primary winding through the resonant inductor L2, the other end of the primary winding is connected to a source of the switching tube Q4 through the resonant capacitor C3, a source of the synchronous rectifier Q5 is connected to one end of a secondary winding of the transformer T1, a source of the synchronous rectifier Q6 is connected to the other end of the secondary winding of the transformer T1, the drains of the synchronous rectifier tubes Q5 and Q6 are connected to form a first direct current output line connected with the direct current output port, and the middle part of the secondary winding is connected with the direct current output port to form a second direct current output line.
As a further preferable embodiment of the present invention, a smoothing capacitor E2 is further connected between the first dc output line and the second dc output line, the voltage feedback circuit is connected to both ends of the smoothing capacitor E2, the second voltage sampling circuit is connected between the first rectification output line and the second rectification output line, the second driving circuit is connected to the gates of the switching tubes Q3 and Q4, and the isolation driving circuit is connected to the gates of the synchronous rectification tubes Q5 and Q6.
As a further preferable technical solution of the present invention, the control unit is a DSP controller, the DSP controller is connected to the RS485 communication interface through a photoelectric isolation circuit, and the DSP controller is further connected to an address switch for setting a communication address of the RS485 communication interface.
According to another aspect of the present invention, the present invention further provides an aging test system, which includes a dc power supply, an upper computer, at least one inverter for aging test, and any one of the above ac electronic load modules for inverter aging test connected to the inverter in a one-to-one correspondence, where the dc power supply is connected to each inverter through a dc power supply bus to provide dc power, the ac electronic load module inputs ac power output by the inverter through an ac input port and converts the ac power into dc power, and then feeds the dc power back to the dc power supply bus through a dc output port, and the upper computer is connected to each ac electronic load module in a communication manner to monitor the aging test.
As a further preferable technical scheme of the present invention, when a plurality of ac electronic load modules are provided, the RS485 communication interfaces of the ac electronic load modules are all connected to the same RS485 bus, and the RS485 bus is connected to the RS-232 interface of the upper computer through the photoelectric isolation converter.
According to the alternating current electronic load module and the aging test system for the aging test of the inverter power supply, the alternating current electronic load module of the technical scheme is adopted, so that the output direct current of the direct current power supply is enabled to flow to the direct current power supply bus, the input energy is provided for the inverter power supply to be tested, the alternating current electronic load module rectifies and reduces the voltage of the alternating current voltage output by the inverter power supply and then merges the rectified and reduced voltage into the direct current power supply bus, energy feedback is achieved, the direct current power supply supplies only need to supplement a loss part generated by the conversion efficiency of the inverter power supply and the energy-saving alternating current electronic load module after the system works, electric energy is saved, the investment of matched equipment is greatly reduced, and the test cost is.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic block diagram of a conventional inverter power supply aging test scheme;
FIG. 2 is a schematic block diagram of an AC electronic load module for inverter power supply aging testing in an embodiment of the present invention;
FIG. 3 is a block diagram of a system for inverter power supply burn-in testing in an embodiment of the present invention;
fig. 4 is a schematic diagram of an energy feedback principle for the inverter power aging test system according to the embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the invention, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the invention.
As shown in fig. 2, the ac electronic load module for the inverter power aging test includes an ac load unit, an energy feedback unit, and a control unit for driving the ac load unit and the energy feedback unit, wherein:
the alternating current load unit consists of an alternating current input port, a first voltage sampling circuit, a phase detection circuit, a current sampling circuit, a first driving circuit and a bridgeless PFC (power factor correction), wherein the input end of the bridgeless PFC is connected with the alternating current input port, the control unit is respectively connected with the first voltage sampling circuit, the current sampling circuit and the phase detection circuit so as to sample the voltage, the current and the phase of alternating current input by the alternating current input port, and the control unit is connected with the first driving circuit so as to drive the bridgeless PFC to work;
the energy feedback unit is composed of a second voltage sampling circuit, a second driving circuit, an LLC resonant converter, an isolation driving circuit, a voltage feedback circuit and a direct current output port, wherein the input end of the LLC resonant converter is connected with the output end of the bridgeless PFC, the direct current output port is connected with the output end of the LLC resonant converter, the control unit is connected with the second voltage sampling circuit to acquire the voltage at the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to acquire the voltage at the direct current output port, and the control unit is respectively connected with the second driving circuit and the isolation driving circuit to drive the LLC resonant converter to work.
In a specific implementation, the bridgeless PFC includes a switching tube Q1, a switching tube Q2, a rectifying diode D1, a rectifying diode D2, and an energy storage capacitor E1, cathodes of the rectifying diodes D1 and D2 are connected to form a first rectifying output line connected to an ac input port, sources of the switching tubes Q1 and Q2 are connected to form a second rectifying output line connected to the ac input port, the energy storage capacitor E1 is connected between the first and second rectifying output lines, an anode of the rectifying diode D1 and a drain of the switching tube Q1 are connected to form a first ac input line, an anode of the rectifying diode D2 and a drain of the switching tube Q2 are connected to form a second ac input line, and the first driving circuit is connected to gates of the switching tubes Q1 and Q2, respectively.
In specific implementation, an EMI filter is further connected between the input end of the bridgeless PFC and the ac input port, an inductor L1 is connected in series in a line connecting the first ac input line and the EMI filter, a current sampling resistor R1 is connected in series in a line connecting the second ac input line and the EMI filter, and R1 is used as a sampling resistor of the ac input current, and is amplified by a current sampling circuit and then sent to a DSP controller for controlling the pull-load current or power.
In a specific implementation, the first voltage sampling circuit is connected to an input end of the EMI filter, the phase detection circuit is connected to the first voltage sampling circuit, and the current sampling circuit is connected to two ends of the current sampling resistor R1.
In a specific implementation, the LLC resonant converter is composed of a switching tube Q3, a switching tube Q4, a synchronous rectifier Q5, a synchronous rectifier Q6, a resonant inductor L2, a resonant capacitor C3, and a transformer T1, a drain of the switching tube Q3 is connected to a first rectification output line, a source of the switching tube Q4 is connected to a second rectification output line, the transformer T1 has a primary winding and a secondary winding, a source of the switching tube Q3 is connected to a drain of the switching tube Q4 and then connected to one end of the primary winding through the resonant inductor L2, the other end of the primary winding is connected to a source of the switching tube Q4 through the resonant capacitor C3, a source of the synchronous rectifier Q5 is connected to one end of the secondary winding of the transformer T1, a source of the synchronous rectifier Q6 is connected to the other end of the secondary winding of the transformer T1, drains of the synchronous rectifiers Q5 and Q6 are connected to form a first rectification output line connected to a dc output port, and the middle part of the secondary winding is connected with the direct current output port to form a second direct current output line.
In a specific implementation, a filter capacitor E2 is further connected between the first dc output line and the second dc output line, the voltage feedback circuit is connected to two ends of the filter capacitor E2, the second voltage sampling circuit is connected between the first rectification output line and the second rectification output line, the second driving circuit is connected to the gates of the switching tubes Q3 and Q4, and the isolation driving circuit is connected to the gates of the synchronous rectification tubes Q5 and Q6.
In specific implementation, the control unit is a DSP controller, the DSP controller is connected with the RS485 communication interface through a photoelectric isolation circuit, and the DSP controller and the RS485 communication interface are isolated by adopting photoelectric isolation so as to improve the anti-interference capability and stability of the communication loop. The DSP controller is further connected with an address switch for setting a communication address of the RS485 communication interface, and the address switch is used for setting a unique address for each load module, so that the upper computer can be accurately positioned to each channel of each load module.
As shown in fig. 3, the present invention further provides an aging test system, which includes a dc power supply, an upper computer, at least one inverter for aging test, and the ac electronic load module for aging test of the inverter according to any of the above embodiments connected to the inverter in a one-to-one correspondence manner, wherein after the input end of the dc power supply is connected to an ac power supply for ac/dc conversion, the output end of the dc power supply is connected to each inverter through a dc power supply bus to provide dc power, and the dc output end of the dc power supply supplies power to the dc power supply bus uniformly. The alternating current electronic load module inputs alternating current output by the inverter power supply through the alternating current input port and converts the alternating current into direct current, and then the direct current electronic load module feeds back the direct current to the direct current power supply bus through the direct current output port. The upper computer is in communication connection with each alternating current electronic load module to monitor the aging test, the alternating current electronic load modules can carry out constant current or constant power loading according to parameters set by the monitoring computer, and can transmit data in the aging test process to the monitoring computer in real time to record the data and generate reports and the like.
In specific implementation, when the alternating current electronic load modules are multiple, the RS485 communication interfaces of the alternating current electronic load modules are connected to the same RS485 bus, the RS485 bus is connected to the RS-232 interface of the upper computer through the photoelectric isolation converter, and the address switch is used for setting the only communication address of the alternating current load modules on the RS485 bus so that the upper computer is in communication connection with the DSP controllers of the alternating current electronic load modules, and the working state and the pull-load parameters of the alternating current electronic load modules are monitored.
In this embodiment, the DSP controller performs voltage detection and phase locking on the ac input of the ac electronic load module according to the first voltage sampling circuit and the phase detection circuit, and the ac input port is connected to the ac output terminal of the inverter power supply to be detected, and supplies power to the bridgeless PFC circuit after passing through the EMI filter. In the test process, the DSP controller outputs SPWM switching signals according to the voltage amplitude and the phase of alternating current input, the SPWM switching signals are amplified by the first driving circuit and then control the switching tubes Q1 and Q2, one freewheeling current and the other freewheeling current are made to be high-frequency switches and respectively work alternately in positive and negative half cycles of alternating current voltage, the inductor L1 is a boosting inductor and is rectified by the rectifying diodes D1 and D2 to charge the energy storage capacitor E1, and meanwhile, energy is provided for the rear-stage LLC converter. The bridgeless PFC circuit ensures that the input current and the input voltage have the same frequency and phase while realizing boosting, so that the input state of the load is resistive.
In this embodiment, the LLC resonant converter is used as an energy feedback unit of the energy-saving ac electronic load module, and isolates and converts the high-voltage dc rectified by the bridgeless PFC circuit into low-voltage dc, which is connected in parallel with the dc power supply bus through the dc output port. Because the direct current supply bus has line voltage drop and loss, the direct current output voltage of the energy-saving alternating current electronic load module is generally set to be 10% -20% higher than the voltage of the direct current supply bus, so that the energy can be completely recycled.
In specific implementation, after the front-end bridgeless PFC circuit works, the DSP controller simultaneously outputs two pairs of PWM signals with the same frequency, opposite phases and 50% duty ratio, wherein one pair of PWM signals controls the switching tubes Q3 and Q4 after being amplified by the second driving circuit, and the other pair of PWM signals controls the synchronous rectifier tubes Q5 and Q6 after being amplified by the isolation driving circuit, and the switching frequency of the synchronous rectifier tubes is equal to the resonant frequency of the LLC resonant converter, so that the switching tubes Q3 and Q4 work in a zero-voltage switching mode, and the synchronous rectifier tubes Q5 and Q6 work in a zero-current switching mode, so that the efficiency of the converter is improved.
In this embodiment, the voltage feedback circuit is used for controlling the dc output voltage and is monitored by the DSP controller in real time to prevent the output voltage from being over-voltage due to a line fault.
In order to further understand the present invention, the energy feedback principle for the inverter power aging test system according to the present invention is illustrated in the following fig. 4:
as shown in fig. 4, in this embodiment, an inverter power supply and an ac electronic load module with 90% conversion efficiency are used, the inverter power supply outputs 100KW to the ac electronic load module as ac input, and then the ac electronic load module converts the input ac input into dc to output the dc, and the output power of the ac electronic load module is 100KW × 0.9 — 90 KW. The energy output by the AC load is returned to the output end of the DC power supply and is connected in parallel, and the energy is supplied to the inverter power supply together. Because the total input power of inverter is 110KW, and the ac load returns 90KW, therefore, the dc power supply only needs to provide the energy supply of 20KW just can maintain the ageing of 110KW inverter, namely 90KW +20KW ═ 110 KW. The alternating current electronic load module rectifies and reduces the voltage of the alternating current voltage output by the inverter and then merges the rectified and reduced voltage into the output end of the direct current power supply (the output end of the direct current power supply and the input end of the inverter are respectively connected to a direct current power supply bus), so that energy feedback is realized, the direct current power supply only needs to supplement the loss part generated by the conversion efficiency of the inverter and the energy-saving alternating current electronic load module after the system works, electric energy is saved, the investment of matched equipment is greatly reduced, and the test cost is reduced.
Compared with the traditional inverter power aging scheme, the invention has the main difference of energy consumption saving, the electric energy feedback efficiency is more than 80%, the manufacturing cost can be obviously reduced, and the invention also has the following advantages:
1) the aging process can be monitored in real time, the output parameters of the tested product are recorded, and a test report is automatically generated;
2) within the nominal power of the load module, the load power can be set arbitrarily to be compatible with the aging requirements of the inverter power supplies with different powers;
3) the power requirement of a direct current power supply is reduced, and the equipment investment cost is reduced;
4) the heat generated by the test is greatly reduced, the production environment is improved, and the workshop refrigeration cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein. For example, the bridgeless PFC adopted in the present invention is a standard bridgeless PFC, and circuits such as an improved and evolved dual-Boost bridgeless PFC, a bidirectional switch bridgeless PFC, a totem pole PFC, and the like, which have the same function, may be implemented, and are not illustrated here.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (9)
1. An alternating current electronic load module for an inverter power supply aging test is characterized by comprising an alternating current load unit, an energy feedback unit and a control unit for driving the alternating current load unit and the energy feedback unit, wherein:
the alternating current load unit consists of an alternating current input port, a first voltage sampling circuit, a phase detection circuit, a current sampling circuit, a first driving circuit and a bridgeless PFC (power factor correction), wherein the input end of the bridgeless PFC is connected with the alternating current input port, the control unit is respectively connected with the first voltage sampling circuit, the current sampling circuit and the phase detection circuit so as to sample the voltage, the current and the phase of alternating current input by the alternating current input port, and the control unit is connected with the first driving circuit so as to drive the bridgeless PFC to work;
the energy feedback unit is composed of a second voltage sampling circuit, a second driving circuit, an LLC resonant converter, an isolation driving circuit, a voltage feedback circuit and a direct current output port, wherein the input end of the LLC resonant converter is connected with the output end of the bridgeless PFC, the direct current output port is connected with the output end of the LLC resonant converter, the control unit is connected with the second voltage sampling circuit to acquire the voltage at the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to acquire the voltage at the direct current output port, and the control unit is respectively connected with the second driving circuit and the isolation driving circuit to drive the LLC resonant converter to work.
2. The AC electronic load module for inverter power supply aging testing of claim 1, it is characterized in that the bridgeless PFC consists of a switching tube Q1, a switching tube Q2, a rectifier diode D1, a rectifier diode D2 and an energy storage capacitor E1, cathodes of the rectifier diodes D1, D2 are connected to form a first rectified output line connected to an ac input port, the sources of the switching tubes Q1 and Q2 are connected to form a second rectification output line connected with an alternating current input port, the energy storage capacitor E1 is connected between the first and second rectification output lines, the anode of the rectification diode D1 and the drain of the switch tube Q1 are connected to form a first alternating current input line, the anode of the rectifying diode D2 and the drain of the switch tube Q2 are connected to form a second alternating current input line, and the first driving circuit is respectively connected with the gates of the switch tubes Q1 and Q2.
3. The ac electronic load module for the aging test of the inverter power supply of claim 2, wherein an EMI filter is further connected between the input terminal and the ac input port of the bridgeless PFC, an inductor L1 is connected in series in a line connecting the first ac input line and the EMI filter, and a current sampling resistor R1 is connected in series in a line connecting the second ac input line and the EMI filter.
4. The ac electronic load module for inverter power supply aging testing of claim 3, wherein the first voltage sampling circuit is connected to the input terminal of the EMI filter, the phase detection circuit is connected to the first voltage sampling circuit, and the current sampling circuit is connected to both ends of the current sampling resistor R1.
5. The AC electronic load module for aging test of inverter according to claim 4, wherein the LLC resonant converter is composed of a switch Q3, a switch Q4, a synchronous rectifier Q5, a synchronous rectifier Q6, a resonant inductor L2, a resonant capacitor C3 and a transformer T1, the drain of the switch Q3 is connected to the first rectifying output line, the source of the switch Q4 is connected to the second rectifying output line, the transformer T1 has a primary winding and a secondary winding, the source of the switch Q3 is connected to the drain of the switch Q4 and then connected to one end of the primary winding through the resonant inductor L2, the other end of the primary winding is connected to the source of the switch Q4 through the resonant capacitor C3, the source of the synchronous rectifier Q5 is connected to one end of the secondary winding of the transformer T1, the source of the synchronous rectifier Q6 is connected to the other end of the secondary winding of the transformer T1, the drains of the synchronous rectifier tubes Q5 and Q6 are connected to form a first direct current output line connected with the direct current output port, and the middle part of the secondary winding is connected with the direct current output port to form a second direct current output line.
6. The AC electronic load module for the aging test of the inverter power supply as claimed in claim 5, wherein a filter capacitor E2 is further connected between the first DC output line and the second DC output line, the voltage feedback circuit is connected between two ends of the filter capacitor E2, the second voltage sampling circuit is connected between the first rectification output line and the second rectification output line, the second driving circuit is connected to the gates of the switching tubes Q3 and Q4, respectively, and the isolation driving circuit is connected to the gates of the synchronous rectification tubes Q5 and Q6, respectively.
7. The alternating current electronic load module for the aging test of the inverter power supply as claimed in any one of claims 1 to 6, wherein the control unit is a DSP controller, the DSP controller is connected with the RS485 communication interface through a photoelectric isolation circuit, and the DSP controller is further connected with an address switch for setting a communication address of the RS485 communication interface.
8. An aging test system, comprising a dc power supply, an upper computer, at least one inverter for aging test, and the ac electronic load modules of any one of claims 1 to 7 connected to the inverter in one-to-one correspondence, wherein the dc power supply is connected to each inverter via a dc power supply bus to provide dc power, the ac electronic load modules input ac power from the inverter via an ac input port and convert the ac power into dc power, and then feed the dc power back to the dc power supply bus via a dc output port, and the upper computer is connected to each ac electronic load module in communication to monitor the aging test.
9. The aging test system of claim 8, wherein when a plurality of AC electronic load modules are provided, the RS485 communication interfaces of the AC electronic load modules are all connected to the same RS485 bus, and the RS485 bus is connected to the RS-232 interface of the upper computer through the photoelectric isolation converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789672.3U CN210109284U (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for inverter power supply aging test and aging test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789672.3U CN210109284U (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for inverter power supply aging test and aging test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210109284U true CN210109284U (en) | 2020-02-21 |
Family
ID=69562533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920789672.3U Withdrawn - After Issue CN210109284U (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for inverter power supply aging test and aging test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210109284U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146828A (en) * | 2019-05-27 | 2019-08-20 | 深圳市科赛电子有限公司 | A kind of alternating current electronic load module and aging testing system for inverter burn-in test |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
| CN115356582A (en) * | 2022-10-22 | 2022-11-18 | 深圳市鼎泰佳创科技有限公司 | Dynamic aging system of photovoltaic inverter |
-
2019
- 2019-05-27 CN CN201920789672.3U patent/CN210109284U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146828A (en) * | 2019-05-27 | 2019-08-20 | 深圳市科赛电子有限公司 | A kind of alternating current electronic load module and aging testing system for inverter burn-in test |
| CN110146828B (en) * | 2019-05-27 | 2024-05-17 | 深圳市科赛电子有限公司 | Alternating current electronic load module for aging test of inverter power supply and aging test system |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
| CN115356582A (en) * | 2022-10-22 | 2022-11-18 | 深圳市鼎泰佳创科技有限公司 | Dynamic aging system of photovoltaic inverter |
| CN115356582B (en) * | 2022-10-22 | 2023-01-17 | 深圳市鼎泰佳创科技有限公司 | Dynamic aging system of photovoltaic inverter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110146828B (en) | Alternating current electronic load module for aging test of inverter power supply and aging test system | |
| US8335090B2 (en) | Low cost high efficiency high power solar power conversion system circuit and solar power supply system | |
| CN210109284U (en) | Alternating current electronic load module for inverter power supply aging test and aging test system | |
| CN101551446B (en) | Energy feedback power source aging system | |
| CN101777845A (en) | High-efficiency full range type switched power supplier | |
| CN103701309A (en) | Alternating-direct current power supply system for variable frequency equipment and variable frequency air conditioner | |
| TW201803241A (en) | Distributed module type grid-connected conversion device and its control method especially for storing off-grid electricity in batteries and selling same to a power supplier | |
| CN102074971B (en) | Feedback load energy-saving circuit for aging test and control method thereof | |
| CN108281979A (en) | A kind of electronics feedback load circuit of suitable low-voltage, high-current input | |
| CN102255336A (en) | High-efficiency and energy-saving self-circulation electronic load | |
| CN104659787A (en) | Method and system for aging constant current power supply and detection system | |
| CN102891523B (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN201878014U (en) | Feedback load energy-saving circuit for aging testing | |
| CN213027829U (en) | Double-transformer push-pull circuit suitable for inverter | |
| CN102116850B (en) | Device and method for testing rectifier | |
| CN205725460U (en) | A kind of half-bridge converter inputting Parallel opertation parallel connection and sharing control system thereof | |
| CN102255356A (en) | Efficient uninterruptible power supply | |
| CN102386800B (en) | Low-voltage heavy-current high-power pulse power supply | |
| CN111614272A (en) | Centralized power supply type load driving method and system | |
| CN102222966A (en) | Uninterrupted power supply | |
| CN202334349U (en) | Direct current isolated grid-connected inversion circuit and photovoltaic inversion system | |
| CN204465001U (en) | The system that a kind of constant-current supply is aging and detection system | |
| CN212305165U (en) | Concentrated power supply type load driving system | |
| CN103078544A (en) | Direct current/alternating current converting system | |
| CN113835037A (en) | Aging test circuit and system of direct current power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240517 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240517 |