CN110146828B - Alternating current electronic load module for aging test of inverter power supply and aging test system - Google Patents
Alternating current electronic load module for aging test of inverter power supply and aging test system Download PDFInfo
- Publication number
- CN110146828B CN110146828B CN201910448615.3A CN201910448615A CN110146828B CN 110146828 B CN110146828 B CN 110146828B CN 201910448615 A CN201910448615 A CN 201910448615A CN 110146828 B CN110146828 B CN 110146828B
- Authority
- CN
- China
- Prior art keywords
- power supply
- current
- alternating current
- circuit
- electronic load
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000032683 aging Effects 0.000 title claims abstract description 34
- 230000002431 foraging effect Effects 0.000 title claims description 8
- 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 20
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 18
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000005693 optoelectronics Effects 0.000 claims 1
- 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
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The alternating current electronic load module for the aging test of the inverter power supply 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 conversion efficiency of the inversion power supply and the energy-saving alternating current electronic load module after the system works, thereby saving electric energy, greatly reducing the investment of matched equipment and lowering the test cost.
Description
Technical Field
The invention relates to the field of power supply aging test, 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 inspect and improve the reliability, stability and safety of the inverter power supply (also called inverter) products, the aging test of the inverter power supply has become an important link in the production process flow of the products. By "burn-in" is meant simulating a long-term full-load test of a power supply product under severe conditions of high temperature to simulate severe conditions that may occur in actual use to verify the performance of the product.
The traditional inverter power supply aging test equipment mainly comprises pure resistive dummy loads such as bulbs, high-power resistors or heating wires and the like. As shown in fig. 1, the conventional solution for ageing of the inverter power supply is that a high-power dc power supply provides dc input for the inverter power supply, and a lamp 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. Since the power of a single inverter power supply is typically 50W to 5kW or more, a large amount of electric energy is consumed in the aging process, and the conventional inverter power supply aging test solution has the following disadvantages:
1) 100% of energy consumption, and greatly increases the product testing cost;
2) The test process cannot be monitored, no data record exists, and quality tracking cannot be performed;
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 bad, and the body injury is caused to the testers;
5) The high temperature and high heat have fire hazards.
Disclosure of Invention
The invention provides an alternating current electronic load module for an 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 an inverter aging test, comprising 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, 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 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 to drive the bridgeless PFC to work;
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, 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 collect the voltage of the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to collect the voltage of 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 embodiment of the present invention, the bridgeless PFC is composed of a switching tube Q1, a switching tube Q2, a rectifying diode D1, a rectifying diode D2 and an energy storage capacitor E1, wherein 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 rectifying output line and the second rectifying output line, 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 scheme of the invention, 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 connected with the EMI filter by the first ac input line, and a current sampling resistor R1 is connected in series in a line connected with the EMI filter by the second ac input line.
As a further preferable aspect of the present invention, 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.
As a further preferable technical scheme of the present invention, the LLC resonant converter is composed of a switching tube Q3, a switching tube Q4, a synchronous rectifying tube Q5, a synchronous rectifying tube Q6, a resonant inductor L2, a resonant capacitor C3 and a transformer T1, wherein a drain electrode of the switching tube Q3 is connected to a first rectifying output line, a source electrode of the switching tube Q4 is connected to a second rectifying output line, the transformer T1 has a primary winding and a secondary winding, a source electrode of the switching tube Q3 is connected to a drain electrode of the switching tube Q4 and then to one end of the primary winding through the resonant inductor L2, the other end of the primary winding is connected to a source electrode of the switching tube Q4 through the resonant capacitor C3, a source electrode of the synchronous rectifying tube Q5 is connected to one end of the secondary winding of the transformer T1, a source electrode of the synchronous rectifying tube Q6 is connected to the other end of the secondary winding of the transformer T1, drains of the synchronous rectifying tubes Q5 and Q6 are connected to form a first dc output line connected to a dc output port, and a middle part of the synchronous rectifying tube Q6 is connected to a second dc output port.
As a further preferable technical scheme of the invention, 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 rectifying output line and the second rectifying output line, the second driving circuit is respectively connected with the gates of the switching transistors Q3 and Q4, and the isolation driving circuit is respectively connected with the gates of the synchronous rectifying transistors Q5 and Q6.
As a further preferable technical scheme of the invention, the control unit is a DSP controller, the DSP controller is connected with an RS485 communication interface through a photoelectric isolation circuit, and the DSP controller is also connected with an address switch for setting a communication address of the RS485 communication interface.
According to another aspect of the present invention, there is further provided an aging test system, including a dc power supply, an upper computer, at least one inverter power supply for aging test, and any one of the ac electronic load modules for aging test of the inverter power supply described above connected in one-to-one correspondence with the inverter power supply, where the dc power supply is respectively connected with each of the inverter power supplies through a dc power supply bus to provide dc power, the ac electronic load module inputs ac power output by the inverter power supply through an ac input port and converts the ac power into dc power, and then the dc power is fed back to the dc power supply bus through a dc output port, and the upper computer is communicatively connected with each of the ac electronic load modules to monitor the aging test.
As a further preferable technical scheme of the invention, when a plurality of alternating current electronic load modules are provided, the RS485 communication interfaces of the alternating current 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 adopts the technical scheme, so that the output direct current of the direct current power supply reaches the direct current power supply bus, input energy is provided for the inverter power supply to be tested, the alternating current electronic load module rectifies and reduces the alternating current voltage output by the inverter power supply and then is integrated into the direct current power supply bus, energy feedback is realized, and the direct current power supply only needs 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, so that electric energy is saved, investment of matched equipment is greatly reduced, and the test cost is reduced.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic block diagram of a conventional inverter power supply burn-in test scheme;
FIG. 2 is a schematic block diagram of an AC electronic load module for inverter burn-in testing in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of a system for inverter burn-in testing in accordance with an embodiment of the present invention;
Fig. 4 is a schematic diagram of the energy feedback principle of the inverter power aging test system according to the embodiment of the invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The invention will be further described with reference to the drawings and detailed description. The terms such as "upper", "lower", "left", "right", "middle" and "a" in the preferred embodiments are merely descriptive, but are not intended to limit the scope of the invention, as the relative relationship changes or modifications may be otherwise deemed to be within the scope of the invention without substantial modification to the technical context.
As shown in fig. 2, the ac electronic load module for the aging test of the inverter power supply 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, 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 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 to drive the bridgeless PFC to work;
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, 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 collect the voltage of the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to collect the voltage of 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 is composed of a switching tube Q1, a switching tube Q2, a rectifying diode D1, a rectifying diode D2 and an energy storage capacitor E1, wherein cathodes of the rectifying diodes D1 and D2 are connected to form a first rectifying output line connected with an ac input port, sources of the switching tubes Q1 and Q2 are connected to form a second rectifying output line connected with the ac input port, the energy storage capacitor E1 is connected between the first rectifying output line and the second rectifying output line, an anode of the rectifying diode D1 is connected with a drain of the switching tube Q1 to form a first ac input line, an anode of the rectifying diode D2 is connected with a drain of the switching tube Q2 to form a second ac input line, and the first driving circuit is connected with gates of the switching tubes Q1 and Q2 respectively.
In a 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 connected with the EMI filter by the first ac input line, a current sampling resistor R1 is connected in series in a line connected with the EMI filter by the second ac input line, and R1 is used as a sampling resistor of an ac input current, amplified by the current sampling circuit, and then sent to the DSP controller for controlling a pulling load current or power.
In a specific implementation, the first voltage sampling circuit is connected to the 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 specific implementation, the LLC resonant converter is composed of a switching tube Q3, a switching tube Q4, a synchronous rectifying tube Q5, a synchronous rectifying tube Q6, a resonant inductor L2, a resonant capacitor C3 and a transformer T1, wherein a drain electrode of the switching tube Q3 is connected with a first rectifying output line, a source electrode of the switching tube Q4 is connected with a second rectifying output line, the transformer T1 has a primary winding and a secondary winding, a source electrode of the switching tube Q3 is connected with a drain electrode of the switching tube Q4 and then is connected with one end of the primary winding through the resonant inductor L2, the other end of the primary winding is connected with a source electrode of the switching tube Q4 through the resonant capacitor C3, a source electrode of the synchronous rectifying tube Q5 is connected with one end of the secondary winding of the transformer T1, a source electrode of the synchronous rectifying tube Q6 is connected with the other end of the secondary winding of the transformer T1, drains of the synchronous rectifying tubes Q5 and Q6 are connected to form a first direct current output line connected with a direct current output port, and a middle part of the secondary winding is connected with the direct current output port to form a second direct current output line.
In 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 rectifying output line and the second rectifying output line, the second driving circuit is respectively connected with gates of the switching transistors Q3 and Q4, and the isolation driving circuit is respectively connected with gates of the synchronous rectifying transistors 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 photoelectric isolation is adopted between the DSP controller and the RS485 communication interface so as to improve the anti-interference capability and stability of a communication loop. The DSP controller is also connected with an address switch for setting the 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 accurately position each channel of each load module.
As shown in fig. 3, the invention further provides an aging test system, which comprises a dc power supply, an upper computer, at least one inverter power supply for aging test, and the ac electronic load module for aging test of the inverter power supply according to any one of the embodiments, wherein the inverter power supply is connected with the dc power supply one by one, the input end of the dc power supply is connected with the ac power supply for ac-dc conversion, and the output end of the dc power supply is respectively connected with each inverter power supply through a dc power supply bus to provide dc power, and the dc output end of the dc power supply supplies the dc power to the dc power supply bus in a unified manner. The alternating current electronic load module inputs alternating current output by the inverter power supply through an alternating current input port and converts the alternating current into direct current, and then the direct current is fed back to a direct current power supply bus through a 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 module 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 a report and the like.
In a specific implementation, when the number of the alternating current electronic load modules is multiple, the RS485 communication interfaces of the alternating current electronic load modules are all 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, wherein the address switch is used for setting a unique communication address of the alternating current load module on the RS485 bus, so that the upper computer is in communication connection with the DSP controller of each alternating current electronic load module, and the monitoring of the working state and the pulling parameters of the alternating current electronic load modules is realized.
The DSP controller in the embodiment performs voltage detection and phase locking on the alternating current input of the alternating current electronic load module according to the first voltage sampling circuit and the phase detection circuit, an alternating current input port is connected with an alternating current output end of the tested inverter power supply, and the alternating current input port 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 amplitude and the phase of the alternating-current input voltage, and the SPWM switching signals are amplified by the first driving circuit and then control the switching tubes Q1 and Q2, so that one of the switching tubes is used as a high-frequency switch, the other one of the switching tubes is used as a high-frequency switch, the switching tubes alternately work when the alternating-current voltage is positive and negative in half cycles respectively, the inductor L1 is a boosting inductor, the rectifying diodes D1 and D2 rectify the voltage and then charge the energy storage capacitor E1, and meanwhile, energy is provided for the backward LLC converter. The bridgeless PFC circuit ensures that the input current and the input voltage are in the same frequency and phase while boosting is realized, so that the load input state 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 converts the high-voltage dc rectified by the bridgeless PFC circuit into low-voltage dc, and is connected in parallel with the dc power supply bus through the dc output port. Because the direct current power supply bus has line voltage drop and loss, the direct current output voltage of the energy-saving alternating current electronic load module is generally 10% -20% higher than the direct current power supply bus voltage, so that the energy can be fully recycled.
In specific implementation, after the front-end bridgeless PFC circuit works, the DSP controller outputs two pairs of PWM signals with the same frequency, opposite phases and 50% duty ratio at the same time, wherein one pair of PWM signals is amplified by the second driving circuit and then controls the switching transistors Q3 and Q4, and the other pair of PWM signals is amplified by the isolation driving circuit and then controls the synchronous rectifying transistors Q5 and Q6, and the switching frequency of the PWM signals is equal to the resonant frequency of the LLC resonant converter, so that the switching transistors Q3 and Q4 work in a zero-voltage switching mode, and the synchronous rectifying transistors Q5 and Q6 work in a zero-current switching mode, so as to improve the converter efficiency.
In this embodiment, the voltage feedback circuit is used for controlling the dc output voltage, and is monitored in real time by the DSP controller, so as to prevent the output voltage from being over-voltage due to line failure.
For further understanding of the present invention by those skilled in the art, the following illustrates the energy feedback principle of the present invention for an inverter aging test system with reference to fig. 4:
As shown in fig. 4, in this embodiment, an inverter power source and an ac electronic load module with conversion efficiency of 90% are adopted, and the inverter power source outputs 100KW to the ac electronic load module as ac input, and then the ac electronic load module converts the ac input into dc and outputs the dc, where the output power of the ac electronic load module is 100KW, 0.9=90 KW. The energy output by the alternating current load is returned to the output end of the direct current power supply to be connected in parallel, and the energy is supplied to the inverter power supply together. Since the total input power of the inverter power supply is 110KW and the ac load returns 90KW, the dc power supply can maintain the aging of the 110KW inverter power supply by only supplying 20KW of energy, i.e., 90 kw+20kw=110 KW. The alternating current electronic load module rectifies and reduces alternating current voltage output by the inverter power supply and then is integrated 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 power supply are respectively connected to the direct current power supply bus), so that energy feedback is realized, and the direct current power supply only needs 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, so that electric energy is saved, investment of matched equipment is greatly reduced, and test cost is reduced.
Compared with the traditional inverter power supply aging scheme, the invention has the main difference of saving energy consumption, having the electric energy feedback efficiency of more than 80 percent, remarkably reducing the manufacturing cost and simultaneously having 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) The load power can be set at will in the nominal power of the load module so as to be compatible with the ageing requirements of the inverter power supplies with different powers;
3) The power requirement of the direct-current power supply is reduced, and the equipment input 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 foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention. For example, the bridgeless PFC adopted in the invention is standard bridgeless PFC, and the improved and evolved circuits such as double Boost bridgeless PFC, bidirectional switch bridgeless PFC, totem pole PFC and the like can be realized, and are not exemplified here.
While particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely illustrative, 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 only by the appended claims.
Claims (6)
1. An ac electronic load module for an inverter power aging test, comprising 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, 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 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 to drive the bridgeless PFC to work;
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, 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 collect the voltage of the input end of the LLC resonant converter, the control unit is connected with the voltage feedback circuit to collect the voltage of 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;
The bridgeless PFC comprises a switch tube Q1, a switch tube Q2, a rectifier diode D1, a rectifier diode D2 and an energy storage capacitor E1, wherein cathodes of the rectifier diodes D1 and D2 are connected to form a first rectification output line connected with an alternating current input port, sources of the switch tubes Q1 and Q2 are connected to form a second rectification output line connected with the alternating current input port, the energy storage capacitor E1 is connected between the first rectification output line and the second rectification output line, an anode of the rectifier diode D1 is connected with a drain electrode of the switch tube Q1 to form a first alternating current input line, an anode of the rectifier diode D2 is connected with a drain electrode of the switch tube Q2 to form a second alternating current input line, and the first driving circuit is respectively connected with grids of the switch tubes Q1 and Q2;
The LLC resonant converter consists of a switching tube Q3, a switching tube Q4, a synchronous rectifying tube Q5, a synchronous rectifying tube Q6, a resonant inductor L2, a resonant capacitor C3 and a transformer T1, wherein the drain electrode of the switching tube Q3 is connected with a first rectifying output line, the source electrode of the switching tube Q4 is connected with a second rectifying output line, the transformer T1 is provided with a primary winding and a secondary winding, the source electrode of the switching tube Q3 is connected with the drain electrode of the switching tube Q4 through the resonant inductor L2 and then is connected with one end of the primary winding, the other end of the primary winding is connected with the source electrode of the switching tube Q4 through the resonant capacitor C3, the source electrode of the synchronous rectifying tube Q5 is connected with one end of the secondary winding of the transformer T1, the source electrode of the synchronous rectifying tube Q6 is connected with the other end of the secondary winding of the transformer T1, the drain electrodes of the synchronous rectifying tube Q5 and Q6 are connected to form a first direct current output line connected with a 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;
The voltage feedback circuit is connected to two ends of the filter capacitor E2, the second voltage sampling circuit is connected between the first rectifying output line and the second rectifying output line, the second driving circuit is respectively connected with the grid electrodes of the switching tubes Q3 and Q4, and the isolation driving circuit is respectively connected with the grid electrodes of the synchronous rectifying tubes Q5 and Q6.
2. The ac electronic load module for inverter aging testing according to claim 1, wherein 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 of the first ac input line connected to the EMI filter, and a current sampling resistor R1 is connected in series in a line of the second ac input line connected to the EMI filter.
3. The ac electronic load module for an inverter burn-in test of claim 2, wherein 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.
4. An ac electronic load module for an inverter aging test according to any one of claims 1 to 3, wherein the control unit is a DSP controller, the DSP controller is connected to an 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.
5. The aging test system is characterized by comprising a direct-current power supply, an upper computer, at least one inverter power supply for aging test and the alternating-current electronic load modules for the aging test of the inverter power supply, wherein the alternating-current electronic load modules are in one-to-one correspondence connection with the inverter power supply, the direct-current power supply is respectively connected with each inverter power supply through a direct-current power supply bus to provide direct current, the alternating-current electronic load modules input alternating current output by the inverter power supply through alternating-current input ports and convert the alternating current into direct current, and then the direct current is fed back to the direct-current power supply bus through direct-current output ports, and the upper computer is in communication connection with each alternating-current electronic load module to monitor the aging test.
6. The burn-in system of claim 5 wherein when there are a plurality of ac electronic load modules, the RS485 communication interfaces of each of said ac electronic load modules are all connected to the same RS485 bus, said RS485 bus being connected to the RS-232 interface of the host computer through a opto-electronic isolation converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910448615.3A CN110146828B (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for aging test of inverter power supply and aging test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910448615.3A CN110146828B (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for aging test of inverter power supply and aging test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110146828A CN110146828A (en) | 2019-08-20 |
| CN110146828B true CN110146828B (en) | 2024-05-17 |
Family
ID=67593456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910448615.3A Active CN110146828B (en) | 2019-05-27 | 2019-05-27 | Alternating current electronic load module for aging test of inverter power supply and aging test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110146828B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578203A (en) * | 2020-12-03 | 2021-03-30 | 航天科技控股集团股份有限公司 | Multi-inverter aging test system and test method based on CAN network |
| CN112415417A (en) * | 2020-12-03 | 2021-02-26 | 航天科技控股集团股份有限公司 | Inverter aging test platform based on energy conversion and reuse and aging method |
| CN113098064A (en) * | 2021-04-13 | 2021-07-09 | 深圳市杰能科技有限公司 | Alternating current energy-saving load aging feedback system |
| CN118549741A (en) * | 2024-07-24 | 2024-08-27 | 广州菲利斯太阳能科技有限公司 | Governing system suitable for energy storage dc-to-ac converter |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615856A (en) * | 2008-06-24 | 2009-12-30 | 艾默生网络能源系统北美公司 | A kind of DC power supplier |
| CN101975928A (en) * | 2010-09-07 | 2011-02-16 | 浙江大学 | Aging test system of low DC bus capacitor current ripple |
| KR20110048309A (en) * | 2009-11-02 | 2011-05-11 | 엘지전자 주식회사 | Llc resonant converter and display device |
| CN103176143A (en) * | 2011-12-20 | 2013-06-26 | 陕西银星科技有限公司 | Energy-saving aging circuit of inverter |
| CN203688682U (en) * | 2013-11-22 | 2014-07-02 | 深圳市鼎泰佳创科技有限公司 | Energy saving electronic load for aging inverter |
| CN104052079A (en) * | 2013-03-15 | 2014-09-17 | 余名俊 | Electric energy feedback type electronic load |
| CN204495977U (en) * | 2015-03-27 | 2015-07-22 | 合兴集团汽车电子有限公司 | A kind of ageing tester of DC/AC inverter |
| CN105301518A (en) * | 2015-11-04 | 2016-02-03 | 深圳市中科源电子有限公司 | Energy feedback type power supply ageing test system |
| CN106533195A (en) * | 2016-12-15 | 2017-03-22 | 广东百事泰电子商务股份有限公司 | Intelligent full-bridge sine-wave voltage switching circuit based on PFC and LLC resonance |
| CN107579664A (en) * | 2017-10-27 | 2018-01-12 | 桂林狮达机电技术工程有限公司 | The continuous welding equipment LLC resonance inversions high voltage power supply of electron beam and control method |
| CN207705877U (en) * | 2018-01-25 | 2018-08-07 | 辽宁工业大学 | A kind of automobile mounted charger of high efficiency motor |
| KR20190054992A (en) * | 2017-11-14 | 2019-05-22 | (주)코이즈 | Low-voltage DC-DC Converter AND BATTERY CHARGER |
| CN210109284U (en) * | 2019-05-27 | 2020-02-21 | 深圳市科赛电子有限公司 | Alternating current electronic load module for inverter power supply aging test and aging test system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109247042B (en) * | 2016-03-31 | 2020-11-10 | 昕诺飞控股有限公司 | AC/DC PFC converter, conversion method and LED driver |
-
2019
- 2019-05-27 CN CN201910448615.3A patent/CN110146828B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615856A (en) * | 2008-06-24 | 2009-12-30 | 艾默生网络能源系统北美公司 | A kind of DC power supplier |
| KR20110048309A (en) * | 2009-11-02 | 2011-05-11 | 엘지전자 주식회사 | Llc resonant converter and display device |
| CN101975928A (en) * | 2010-09-07 | 2011-02-16 | 浙江大学 | Aging test system of low DC bus capacitor current ripple |
| CN103176143A (en) * | 2011-12-20 | 2013-06-26 | 陕西银星科技有限公司 | Energy-saving aging circuit of inverter |
| CN104052079A (en) * | 2013-03-15 | 2014-09-17 | 余名俊 | Electric energy feedback type electronic load |
| CN203688682U (en) * | 2013-11-22 | 2014-07-02 | 深圳市鼎泰佳创科技有限公司 | Energy saving electronic load for aging inverter |
| CN204495977U (en) * | 2015-03-27 | 2015-07-22 | 合兴集团汽车电子有限公司 | A kind of ageing tester of DC/AC inverter |
| CN105301518A (en) * | 2015-11-04 | 2016-02-03 | 深圳市中科源电子有限公司 | Energy feedback type power supply ageing test system |
| CN106533195A (en) * | 2016-12-15 | 2017-03-22 | 广东百事泰电子商务股份有限公司 | Intelligent full-bridge sine-wave voltage switching circuit based on PFC and LLC resonance |
| CN107579664A (en) * | 2017-10-27 | 2018-01-12 | 桂林狮达机电技术工程有限公司 | The continuous welding equipment LLC resonance inversions high voltage power supply of electron beam and control method |
| KR20190054992A (en) * | 2017-11-14 | 2019-05-22 | (주)코이즈 | Low-voltage DC-DC Converter AND BATTERY CHARGER |
| CN207705877U (en) * | 2018-01-25 | 2018-08-07 | 辽宁工业大学 | A kind of automobile mounted charger of high efficiency motor |
| CN210109284U (en) * | 2019-05-27 | 2020-02-21 | 深圳市科赛电子有限公司 | Alternating current electronic load module for inverter power supply aging test and aging test system |
Non-Patent Citations (1)
| Title |
|---|
| 能馈型交流电子负载的研究;王浩;曾岳南;刘锦辉;;通信电源技术;20130325(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110146828A (en) | 2019-08-20 |
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 | |
| CN201072438Y (en) | Multi-input channel modularized high-frequency isolation single phase electric energy feedback type electronic load | |
| CN210109284U (en) | Alternating current electronic load module for inverter power supply aging test and aging test system | |
| CN101834539A (en) | High-efficiency AC/DC combined converter with wide output voltage range | |
| CN203423631U (en) | Solar energy no-bridge inverter comprising high boosted circuit | |
| CN103840670A (en) | Energy-saving type high-frequency switching power source | |
| 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 | |
| CN102102841A (en) | High-efficiency solar lighting system | |
| CN102074971B (en) | Feedback load energy-saving circuit for aging test and control method thereof | |
| CN201805599U (en) | Non-coupling bi-polar type LED driver circuit with high power factors | |
| CN102891523B (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN104659787A (en) | Method and system for aging constant current power supply and detection system | |
| CN114156862A (en) | Optical storage direct current micro-grid technology of oil pumping unit | |
| CN201878014U (en) | Feedback load energy-saving circuit for aging testing | |
| CN102255356B (en) | Efficient uninterruptible power supply | |
| CN213027829U (en) | Double-transformer push-pull circuit suitable for inverter | |
| CN209946309U (en) | IGBT drive test circuit | |
| CN204538988U (en) | A kind of Switching Power Supply, frequency-variable controller and convertible frequency air-conditioner | |
| CN102222966A (en) | Uninterrupted power supply | |
| CN107040143B (en) | Power supply circuit, power supply method and metering instrument manufactured by same | |
| CN202888924U (en) | Electric-energy self-circulating type high-power charger aging system | |
| 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 | |
| CN201393179Y (en) | Photovoltaic off-grid inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |