Electronic load device and energy recovery system having the same
By designing an electronic load device that directly returns the recovered electric energy to the device to be tested, the problems of low efficiency and high cost in the prior art are solved, and efficient energy recovery and energy saving effects are achieved.
Patent Information
- Application Number
- CN202410084725.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2025-07-22
AI Technical Summary
The existing energy recovery electronic load devices have low efficiency, high cost and complex wiring during the development stage, which cannot meet the burner testing needs of a small number of equipment.
An electronic load device is designed to directly return the recovered power to the device to be tested, and power is converted through components such as bridge circuit modules, relay switch modules, DC output conversion modules, dual resonance conversion modules and boost conversion modules to directly supply the power demand of the device to be tested, and power output is controlled through the control modules to reduce the power consumption at the mains terminal.
It improves the efficiency of energy use, reduces the overall architecture cost, reduces wiring complexity and space occupation, and saves power consumption.
Smart Images
Figure CN120357735A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an electronic load device and an energy recovery system having the electronic load device, and particularly to an energy recovery system capable of recovering energy during a test, converting wasted energy into electric energy and re-inputting the electric energy into the electronic load device to improve the energy utilization efficiency. Background Art
[0002] Generally, on an industrial production line, aging tests (burn-in) are performed on newly produced electronic devices, which means operating the devices at high load for a period of time to ensure their stable performance and screening out products with early failures. A large amount of heat energy and electric energy are consumed during the burn-in process.
[0003] Generally, in order to recover the energy during the burn-in aging of power products produced in a factory, a recovery-type electronic load is used. The recovery-type electronic load can simulate a real electronic load to test and evaluate power supplies, frequency converters and other power-related devices. Its characteristic is that it can recover part of the energy during the test, convert the originally wasted energy into electric energy and re-input the electric energy into the power grid to improve the energy utilization efficiency.
[0004] As Figure 1 shown, the recovered electric energy of the recovery-type electronic load 2 for the power supply unit 1 (power supply unit) is directly fed into the three-phase power system 3, and the processed power belongs to very large energy consumption. Therefore, the efficiency of this type of energy recovery-type electronic load is relatively poor (generally 40% - 70%). Therefore, this type of device cannot be used generally during the development stage.
[0005] Also, since this type of device is in a series form, the overall wiring requires a wire diameter that can reach the current magnitude required by the power. Due to the very large system, the wiring from the input to the output of all power supply units (power supply unit, PSU) has a certain distance length. Therefore, the cost of the overall architecture is very high. Generally, for this type of system, there can be many power supply units and one DC LOAD with multiple DC INs for a single three-phase output.
[0006] It can be seen from the above description that this type of energy recovery-type electronic load is very wasteful for the development stage. For the development stage, only a small number of devices need to be subjected to burn-in tests. Therefore, it is significantly different from the environment required for burn-in tests of hundreds of industrial products to be shipped.
[0007] For the development environment or engineers, such a complex test environment is not needed. Since this type of industrial test environment is not only large in equipment but also a big problem in wiring. If such a test environment is configured and only used for burn-in tests of one or two devices, it is very wasteful in terms of cost and expense. Summary of the Invention
[0008] To solve the above technical problems, the present invention develops an electronic load device and an energy recovery system with an electronic load device. Instead of feeding the recovered electric energy into a three-phase power system, the power is directly returned to the device under test to supply the power required for the device under test to perform burn-in. The mains power supply only needs to provide the insufficient electric energy of the energy recovery type electronic load. Therefore, in addition to being able to recycle energy, it can also reduce the power consumption at the mains power supply end. Thus, the present invention should be an optimal solution.
[0009] An electronic load device includes: a bridge circuit module electrically connected to a mains power supply end for outputting a mains supply DC power supply; a relay switch module electrically connected to the bridge circuit module and a device under test for outputting an input power supply at the device under test end to the device under test, wherein the input power supply at the device under test end is a sine wave AC power supply or a pulsating DC power supply; a DC output conversion module electrically connected to the relay switch module and the bridge circuit module for converting a high-voltage DC power supply into the load supply DC power supply and outputting the load supply DC power supply to the relay switch module; a double resonance conversion module electrically connected to the DC output conversion module for performing power conversion and outputting the high-voltage DC power supply to the DC output conversion module; a boost conversion module having an input end, the boost conversion module being electrically connected to the device under test, the device under test outputting an output power supply at the device under test end to the boost conversion module, and the boost conversion module boosting the output power supply at the device under test end to output the high-voltage DC power supply to the double resonance conversion module; a first control module electrically connected to the boost conversion module for controlling the operation of the boost conversion module; a second control module electrically connected to the double resonance conversion module for controlling the operation of the double resonance conversion module; a third control module electrically connected to the DC output conversion module for controlling the operation of the DC output conversion module; and a main control module electrically connected to the first control module, the second control module, the third control module and the relay switch module for controlling the output power to be output by the electronic load device, and controlling the boost conversion module, the double resonance conversion module and the DC output conversion module through the first control module, the second control module and the third control module, so as to boost the output power supply at the device under test end, convert the high-voltage DC power supply according to a load conversion efficiency, and then convert it into the load supply DC power supply and output it to the relay switch module.
[0010] More specifically, the electronic load device further includes a current feedback unit, which is electrically connected to the third control module and the input end of the boost conversion module, and is used to confirm whether the electronic load device reaches the desired output power according to the power supply output from the device under test and the DC power supply for the load.
[0011] More specifically, the relay switch module can perform waveform phase switching on the DC power supply from the commercial power supply and the DC power supply for the load, so as to combine the DC power supply from the commercial power supply and the DC power supply for the load into a sinusoidal AC power supply.
[0012] More specifically, the relay switch module can perform waveform combination on the DC power supply from the commercial power supply and the DC power supply for the load, so as to combine the DC power supply from the commercial power supply and the DC power supply for the load into a pulsating DC power supply.
[0013] More specifically, the relay switch module is electrically connected to the device under test through a connection terminal.
[0014] More specifically, the device under test can convert a power supply input from a device under test end into a power supply output from the device under test end through a conversion efficiency under test. The DC power supply for the load is lower than the power supply input from the device under test end, and the power gap between the DC power supply for the load and the power supply input from the device under test end is supplemented by the DC power supply from the commercial power supply.
[0015] An energy recovery system includes: a device under test, which is used to convert a power supply input from a device under test end into a power supply output from the device under test end through a conversion efficiency under test; an electronic load device, which is electrically connected to a commercial power supply end. The electronic load device includes: a power conversion unit, which is used to boost the power supply output from the device under test end, and after converting it into a high-voltage DC power supply according to a load conversion efficiency, convert it into a DC power supply for the load and output it to the device under test; and a commercial power supply processing unit, which is electrically connected to the commercial power supply end and the power conversion unit, and is used to input a DC power supply from the commercial power supply to the device under test. Wherein the DC power supply for the load is lower than the power supply input from the device under test end, and the power gap between the DC power supply for the load and the power supply input from the device under test end is supplemented by the DC power supply from the commercial power supply.
[0016] More specifically, the commercial power supply processing unit has a bridge circuit module, which is electrically connected to a commercial power supply end and is used to input the DC power supply from the commercial power supply to the commercial power supply processing unit.
[0017] More specifically, the power conversion unit can perform waveform phase switching on the DC power supply from the commercial power supply and the DC power supply for the load, so as to combine the DC power supply from the commercial power supply and the DC power supply for the load into a sinusoidal AC power supply.
[0018] More specifically, the power conversion unit can combine the AC power supply DC power source and the load supply DC power source by waveform combination to combine the AC power supply DC power source and the load supply DC power source into a pulsating DC power source.
[0019] More specifically, the power conversion unit includes: a relay switch module electrically connected to the bridge circuit module and a device under test, for combining the AC power supply DC power source and a load supply DC power source to output an input power source for the device under test, where the input power source for the device under test is an AC power source or a DC power source; a DC output conversion module electrically connected to the relay switch module and the bridge circuit module, for converting the high-voltage DC power source into the load supply DC power source and outputting the load supply DC power source to the relay switch module; a double-resonant conversion module electrically connected to the DC output conversion module, for performing power conversion and outputting the high-voltage DC power source to the DC output conversion module; a boost conversion module having an input terminal, the boost conversion module is electrically connected to the device under test, the device under test outputs the output power source for the device under test to the boost conversion module, and the boost conversion module boosts the output power source for the device under test to output the high-voltage DC power source to the double-resonant conversion module; a first control module electrically connected to the boost conversion module, for controlling the operation of the boost conversion module; a second control module electrically connected to the double-resonant conversion module, for controlling the operation of the double-resonant conversion module; a third control module electrically connected to the DC output conversion module, for controlling the operation of the DC output conversion module; and a main control module electrically connected to the first control module, the second control module, the third control module and the relay switch module, for controlling the output power to be output by the electronic load device, and controlling the boost conversion module, the double-resonant conversion module and the DC output conversion module through the first control module, the second control module and the third control module, so as to boost the output power source for the device under test, convert the high-voltage DC power source according to the load conversion efficiency, and then convert it into the load supply DC power source and output it to the relay switch module.
[0020] More specifically, the power conversion unit further includes a current feedback unit electrically connected to the third control module and the input terminal of the boost conversion module, for confirming whether the electronic load device reaches the output power to be output according to the output power source for the device under test and the load supply DC power source.
[0021] More specifically, the relay switch module is electrically connected to the device under test through a connection terminal.
[0022] More specifically, when the device under test is not started, the power input from the mains terminal is converted by the mains processing unit to output a DC power supply from the mains to the device under test and the power conversion unit, so as to start the device under test and the power conversion unit, enabling the device under test to output a power supply from the test end to the power conversion unit. Then, the power conversion unit can boost the power supply from the test end and convert it into a high-voltage DC power supply according to the load conversion efficiency, and then convert it into a DC power supply for the load and output it to the relay switch module. Description of the Drawings
[0023] Figure 1 It is a schematic configuration diagram of an existing recycled electronic load device.
[0024] Figure 2 It is a schematic overall architecture diagram of an energy recovery system with an electronic load device according to the present invention.
[0025] Figure 3 It is a schematic configuration diagram of the electronic load device according to the present invention.
[0026] Figure 4A It is a schematic overall architecture diagram of the electronic load device according to the present invention.
[0027] Figure 4B It is a schematic overall architecture diagram of the electronic load device according to the present invention.
[0028] Figure 4C It is a schematic overall architecture diagram of the electronic load device according to the present invention.
[0029] Description of the Reference Numerals 1: Power supply unit 2: Recycled electronic load 3: Three-phase power system 4: Electronic load device 41: Mains processing unit 411: Bridge circuit module 42: Power conversion unit 4201: Connection terminal 4202: Relay switch module 4203: DC output conversion module 4204: Dual-resonant conversion module 4205: Boost conversion module 4206: First control module 4207: Second control module 4208: Third control module 4209: Main control module 4210: Power factor correction standby unit 4211: Current feedback unit 4212: Fan 5: Device under test 6: Mains power supply terminal 71: Bridge circuit module 72: Mains power supply terminal. Detailed implementation manners
[0030] Regarding other technical contents, features and effects of the present invention, they will be clearly presented in the following detailed description of the preferred embodiments in conjunction with the accompanying drawings of the specification.
[0031] Please refer to Figure 2 , which is a schematic diagram of the overall architecture of an energy recovery system with an electronic load device. As shown in the figure, the energy recovery system includes an electronic load device 4, a device under test 5 and a mains power supply terminal 6.
[0032] The device under test 5 is a power supply unit (PSU), which can convert an input power supply at a device under test end into an output power supply at a device under test end (DC OUT) through a conversion efficiency at a device under test, so that the electronic load device 4 receives the output power supply at a device under test end (DC IN), wherein the conversion efficiency at a device under test is defined by itself according to different designs of the power supply unit.
[0033] The input power supply at a device under test end is a sinusoidal AC power supply or a pulsating DC power supply.
[0034] The conversion efficiency at a device under test of the device under test 5 is mostly fixed, and the output power supply at a device under test end must also be fixed. Therefore, the input power supply at a device under test end must also be fixed to meet the conditions of the conversion efficiency at a device under test. Otherwise, the output power supply at a device under test end will be inaccurate.
[0035] The mains power supply terminal 6 is used to provide a mains power supply to the electronic load device 4, and the mains power supply is an AC power supply or a DC power supply (AC / DC IN).
[0036] The electronic load device 4 is a recycling type electronic load.
[0037] As Figure 3 shown, the electronic load device 4 includes a mains power supply processing unit 41 and a power conversion unit 42.
[0038] The mains power supply processing unit 41 is electrically connected to the mains power supply terminal 6 and the power conversion unit 42, and the mains power supply processing unit 41 is used to output a mains power supply DC power supply to the power conversion unit 42.
[0039] The mains power supply DC power supply is a pulsating DC power supply.
[0040] The power conversion unit 42 is used to boost the power output from the device under test, convert it into a high-voltage DC power supply according to a load conversion efficiency, then convert the high-voltage DC power supply into a DC power supply for the load, and then combine the DC power supply for the load with the mains-supplied DC power supply to output the input power of the device under test to the device under test 5.
[0041] The load conversion efficiency is defined according to different electronic load device designs.
[0042] The DC power supply for the load is a pulsating DC power supply. Since the DC power supply for the load is lower than the input power of the device under test, the power gap between the DC power supply for the load and the input power of the device under test is compensated by the mains-supplied DC power supply.
[0043] As Figure 4A shown, the mains processing unit 41 includes a bridge circuit module 411. The bridge circuit module 411 is electrically connected to the mains terminal 6 (ACL, AC IN / DC IN, ACN, CGND) for receiving the mains-supplied power and outputting the mains-supplied DC power supply.
[0044] As Figure 4A 、 Figure 4B and Figure 4C shown, the power conversion unit 42 includes a connection terminal 4201 (TERMINAL), a relay switch module 4202 (RELAY1, RELAY2), a DC output conversion module 4203 (DC TO DC SINWAVEPOWER STAGE), a dual resonant conversion module 4204 (DUAL Resonant), a boost conversion module 4205 (BOOSTSTAGE), a first control module 4206 (CONTROLLER1), a second control module 4207 (CONTROLLER2), a third control module 4208 (CONTROLLER3), a main control module 4209 (MCU CONTROLLER), a power factor correction standby unit 4210 (PFC STANDBY), a current feedback unit 4211 (Lin Feedback), and a fan 4212 (FAN).
[0045] The relay switch module 4202 is electrically connected to the bridge circuit module 411, and the relay switch module 4202 is electrically connected to the device under test 5 through the connection terminal 4201 for outputting a DC power supply (DC OUT) or an AC power supply (AC OUT) to the device under test 5. At least two relays are provided inside the relay switch module 4202 for switching operation.
[0046] If an AC power supply is to be output, the DC power supply is switched by two relays. After a half-wave waveform is input, the waveform of a certain cycle is used as the positive half-cycle. In the next cycle, the polarity is switched so that the waveform of the next cycle is used as the negative half-cycle. In this way, the phase is repeatedly switched (the positive half-wave / negative half-wave is switched in different pulses) to combine the pulsating DC power supplies of the two half-waves into a sinusoidal AC power supply.
[0047] If a DC power supply is to be output, the DC power supply is switched by two relays. After a half-wave waveform is input, the waveform of a certain cycle is used as the positive half-cycle. In the next cycle, the waveform of the next cycle is also used as the positive half-cycle. In this way, the pulsating DC power supplies of the two half-waves are combined into a continuous half-wave pulsating DC power supply.
[0048] The present invention does not directly use a DC / AC converter, but uses a relay switch module 4202 to synthesize DC into AC. Because if the DC / AC converter is connected in parallel to the mains end, it will change with the change of the mains end, so it is very unstable.
[0049] The DC output conversion module 4203 is electrically connected to the relay switch module 4202 and the bridge circuit module 411 to convert a high-voltage DC power supply into a DC power supply for the load and output the DC power supply for the load to the relay switch module 4202.
[0050] The DC output conversion module 4203 is used to step down the high-voltage DC power supply to match the voltage level of the mains-supplied DC power supply, so that the DC power supply for the load can be combined and output with the mains-supplied DC power supply. In this way, the mains-supplied DC power supply can make up for the power gap between the DC power supply for the load and the input power supply of the device under test.
[0051] The double-resonant conversion module 4204 is electrically connected to the DC output conversion module 4203 to perform power conversion and output the high-voltage DC power supply to the DC output conversion module 4203.
[0052] The boost conversion module 4205 has an input terminal (DC IN). The boost conversion module 4205 is electrically connected to the device under test 5. The device under test 5 outputs a power supply output from the device under test (for example, input 5 - 60V) to the boost conversion module 4205, and the boost conversion module 4205 boosts the power supply output from the device under test to output the high-voltage DC power supply (for example, output 100V) to the double-resonant conversion module 4204.
[0053] The first control module 4206 is electrically connected to the boost conversion module 4205 to control the operation of the boost conversion module 4205.
[0054] The second control module 4207 is electrically connected to the dual-resonant conversion module 4204 to control the operation of the dual-resonant conversion module 4204.
[0055] The third control module 4208 is electrically connected to the DC output conversion module 4203 to control the operation of the DC output conversion module 4203.
[0056] The main control module 4209 is electrically connected to the first control module 4206, the second control module 4207, the third control module 4208, and the relay switch module 4202 to control the output power to be output by the electronic load device 4. And through the first control module 4206, the second control module 4207, and the third control module 4208, the boost conversion module 4205, the dual-resonant conversion module 4204, and the DC output conversion module 4203 are controlled. After boosting the power supply output from the terminal under test and converting it into the high-voltage DC power supply according to a load conversion efficiency, it is then converted into a DC power supply for the load and output to the relay switch module 4202.
[0057] The main control module 4209 is a control chip of the MCU type.
[0058] The power factor correction standby unit 4210 is electrically connected to the first control module 4206, the second control module 4207, the third control module 4208, and the fan 4212 (for example, the power factor correction standby unit 4210 provides 12V to the first control module 4206, the second control module 4207, the third control module 4208, and the fan 4212). The power factor correction standby unit 4210 is used to control the first control module 4206, the second control module 4207, and the third control module 4208 to enter a standby mode to save energy.
[0059] To further illustrate the power factor correction standby unit 4210, the power factor correction standby unit 4210 is used to provide a stable power supply to the first control module 4206, the second control module 4207, the third control module 4208, and the fan 4212 to maintain the stable operation of the power conversion unit 42 of the electronic load device 4.
[0060] However, if the power factor correction standby unit 4210 is also connected to the bridge circuit module 411, the power supply state of the mains terminal 6 will affect the stable operation state of the power conversion unit 42. Therefore, a bridge circuit module 71 is connected to a mains terminal 72 to be independently powered by the mains terminal 72, so that the standby state can be maintained.
[0061] If independent power supply is adopted, even after the power supply at the mains end 6 stops, the system of the power conversion unit 42 can still maintain standby. However, in the present invention, the power factor correction standby unit 4210 can also be directly connected to the bridge circuit module 411, but it is inevitable that the system of the power conversion unit 42 must be shut down due to the power supply at the mains end 6 stopping.
[0062] The current feedback unit 4211 is electrically connected to the input ends of the third control module 4208 and the boost conversion module 4205, and is used to confirm whether the electronic load device 4 reaches the desired output power according to the power supply output from the device under test and the DC power supply for the load.
[0063] After receiving the power supply output from the device under test, the current feedback unit 4211 starts to detect the current (detection current value) of the power supply output from the device under test and transmits it to the third control module 4208. Since the preset output current value that the DC power supply for the load should output is relatively fixed, when changing from the no-load state to the stable output, there is a period of time during which the output power needs to continuously increase.
[0064] Therefore, the third control module 4208 controls the DC output conversion module 4203 to gradually increase the output power from the no-load state according to the comparison between the detection current value and the preset output current value. The double-resonant conversion module 4204 and the boost conversion module 4205 will gradually boost the voltage following the increase in the output power, and the detection current value detected by the current feedback unit 4211 will also increase accordingly.
[0065] After the detection current value is equal to the preset output current value, the third control module 4208 controls the DC output conversion module 4203 to continuously and stably output without increasing the output power.
[0066] The operation of the energy recovery system is exemplified as follows: AC input (AC IN), which is used to input alternating current (AC) from the power supply line into the device (import the alternating current into the system from the AC power supply line ACL (Live line) and ACN (Neutral line)).
[0067] DC load standby on (DC LOAD STANDBY ON), the mains end supplies power to start the electronic load device, enabling it to enter the standby mode (ready to bear the load but not yet actually working), so that the system is ready to operate in standby with lower energy consumption.
[0068] Main control module on (MCU ON), starting the main control module (MCU CONTROLLER) to start monitoring and controlling the actions of the circuit.
[0069] The MCU sets the DC load sink power / current (MCU SET DC LOAD SINK POWER / CURRENT), and sets the absorbed power or current parameters required by the electronic load device through the main control module for it to absorb as a load.
[0070] Load on, starts the electronic load device, enabling the load to start working and consume energy.
[0071] MCU sets relay on, the main control module commands the relay switch (RELAY1 or RELAY2) to further control the current flow in the circuit.
[0072] Terminal AC output, outputs a pulsed DC power supply or an AC sine wave power supply from the connection terminal, which can be connected to the device under test.
[0073] PSU on, enables the device under test (the device under test in the present invention is exemplified by the power supply unit (PSU)) to start working, prepares to provide a DC output, and prepares for subsequent power conversion.
[0074] PSU DC OUT, outputs direct current from the device under test (power supply unit) to the electronic load device.
[0075] Boost on, the boost conversion module of the electronic load device starts the boost phase and begins to increase the DC output voltage.
[0076] Boost 100v ready, when the boost phase is completed and the voltage has been raised to 100 volts, prepare for the next step.
[0077] Dual resonant on, performs dual resonant conversion through the dual resonant conversion module to improve the conversion efficiency and reduce losses.
[0078] DC power stage on, starts the DC power stage through the DC output conversion module, and converts the boosted DC electrical energy into a DC power supply for the load.
[0079] Boost sink current to target, gradually increases the output power through the DC output conversion module to enable the boost conversion module to continuously boost. After the current rises to the preset target value, the DC output conversion module can stably output.
[0080] The DC sine wave power stage driver targets power and is in parallel with the AC input through a bridge, and is in parallel with the mains through a bridge circuit module to make up for the power shortage with the DC power supplied by the mains (the power gap between the DC power supplied by the load and the input power of the device under test).
[0081] To further illustrate the technology of the present invention, assume that the conversion efficiency of the device under test and the load conversion efficiency are both 90%. If the device under test is a 1000W PSU, when the device under test outputs 1000W, under the condition that the conversion efficiency of the device under test is 90%, the input of the device under test must be 1111W.
[0082] Since the load conversion efficiency is 90%, when the device under test inputs 1000W to the electronic load device, the electronic load device can only output 900W. However, the input of the device under test must be 1111W, so there is a power shortage (the power gap is 1111W - 900W = 211W), and 211W is made up by the mains.
[0083] From the above case, the mains only needs to provide a power output of 211W, rather than providing 1111W of output to the device under test. Therefore, through the technical mechanism of the present invention, 900W of consumption can be saved, and the energy-saving efficiency is 900W / 1111W, that is, 81% of the energy-saving efficiency.
[0084] Since the architecture of the present invention is simple, the device under test and the electronic load device can be placed together at the same time, so the occupied volume can be reduced, and thus space can be saved. Therefore, the wiring length requirement between the device under test and the electronic load device is very short, and the wiring of the mains input also only needs 19% of the power, so the wire diameter used can be reduced, and the overall architecture cost can be reduced by 80%.
[0085] When the energy recovery system with an electronic load device provided by the present invention is compared with other existing technologies, its advantages are as follows: The present invention develops a technology that does not need to incorporate the recovered electric energy into the three-phase power system, but directly returns the power to the device under test to supply the power required for the device under test to perform burn-in. The mains only needs to provide the electric energy insufficient for the energy recovery type electronic load. Therefore, in addition to being able to recycle energy, it can also reduce the consumption of electric energy at the mains end.
[0086] When the device under test is not started, the mains power supply must input complete power to output the DC power supply of the mains power supply to the power conversion unit, so as to start the device under test and the power conversion unit. After startup, after the device under test completes one test (burn-in), it can output the output power of the device under test to the power conversion unit, and the power conversion unit will start to feedback power to the device under test. Therefore, the power input by the mains power supply can be reduced in output (as exemplified above, the power supply is reduced from 100% to 19%). Through the cyclic power supply of the power conversion unit, the output power of the device under test during the test can be recycled, and at the same time, the electric energy consumed by the mains power supply can be reduced.
[0087] The present invention has been disclosed as above through the foregoing embodiments. However, it is not intended to limit the present invention. Any person skilled in the art, after understanding the foregoing technical features and embodiments of the present invention and without departing from the spirit and scope of the present invention, may make some modifications and refinements. Therefore, the scope of patent protection of the present invention shall be determined by the claims.
Claims
1. An electronic load device, characterized in that, Comprising: A bridge circuit module electrically connected to a mains power supply terminal for outputting a mains power supply DC power source; A relay switch module electrically connected to the bridge circuit module and a device under test for combining the mains power supply DC power source and a load supply DC power source to output an input power source for the device under test, where the input power source for the device under test is an AC power source or a DC power source; A DC output conversion module electrically connected to the relay switch module and the bridge circuit module for converting a high-voltage DC power source into the load supply DC power source and outputting the load supply DC power source to the relay switch module; A double-resonant conversion module electrically connected to the DC output conversion module for performing power conversion and outputting the high-voltage DC power source to the DC output conversion module; A boost conversion module having an input terminal. The boost conversion module is electrically connected to the device under test. The device under test outputs an output power source for the device under test to the boost conversion module, and the boost conversion module boosts the output power source for the device under test to output the high-voltage DC power source to the double-resonant conversion module; A first control module electrically connected to the boost conversion module for controlling the operation of the boost conversion module; A second control module electrically connected to the double-resonant conversion module for controlling the operation of the double-resonant conversion module; A third control module electrically connected to the DC output conversion module for controlling the operation of the DC output conversion module; And A main control module electrically connected to the first control module, the second control module, the third control module, and the relay switch module for controlling the output power to be output by the electronic load device, and controlling the boost conversion module, the double-resonant conversion module, and the DC output conversion module through the first control module, the second control module, and the third control module, so as to boost the output power source for the device under test, convert the high-voltage DC power source after conversion according to a load conversion efficiency, and then convert it into the load supply DC power source and output it to the relay switch module.
2. The electronic load device according to claim 1, characterized in that It further includes a current feedback unit. The current feedback unit is electrically connected to the third control module and the input terminal of the boost conversion module for confirming whether the electronic load device reaches the output power to be output according to the output power source for the device under test and the load supply DC power source.
3. The electronic load device according to claim 1, characterized in that The relay switch module can perform waveform phase switching on the mains power supply DC power source and the load supply DC power source to combine the mains power supply DC power source and the load supply DC power source into a sine-wave AC power source.
4. The electronic load device according to claim 1, characterized in that, The relay switch module can perform waveform combination on the mains power supply DC power source and the load supply DC power source to combine the mains power supply DC power source and the load supply DC power source into a pulsating DC power source.
5. The electronic load device according to claim 1, wherein The relay switch module is electrically connected to the device under test through a connection terminal.
6. The electronic load device according to claim 1, wherein The device under test can convert an input power supply at a test end into an output power supply at the test end through a test conversion efficiency. The load supplies a DC power supply lower than the input power supply at the test end, and the power gap between the load-supplied DC power supply and the input power supply at the test end is compensated by the mains-supplied DC power supply.
7. An energy recovery system with an electronic load device, characterized in that, Including: A device under test, configured to convert an input power supply at a test end into an output power supply at the test end through a test conversion efficiency; An electronic load device according to any one of claims 1-6, electrically connected to a mains end, the electronic load device including: A power conversion unit, configured to boost the output power supply at the test end, and convert it into a high-voltage DC power supply according to a load conversion efficiency, and then convert it into the input power supply at the test end, and output it to the device under test; And A mains processing unit, electrically connected to the mains end and the power conversion unit, configured to input a mains-supplied DC power supply to the device under test, wherein the load-supplied DC power supply is lower than the input power supply at the test end, and the power gap between the load-supplied DC power supply and the input power supply at the test end is compensated by the mains-supplied DC power supply.
8. The energy recovery system with an electronic load device according to claim 7, wherein, The mains processing unit has a bridge circuit module, and the bridge circuit module is electrically connected to a mains end, configured to input the mains-supplied DC power supply to the mains processing unit.
9. The energy recovery system with an electronic load device according to claim 7, characterized in that, The power conversion unit can perform waveform phase switching on the mains-supplied DC power supply and the load-supplied DC power supply, so as to combine the mains-supplied DC power supply and the load-supplied DC power supply into a sinusoidal AC power supply.
10. The energy recovery system with an electronic load device according to claim 7, characterized in that, The power conversion unit can perform waveform combination on the mains-supplied DC power supply and the load-supplied DC power supply, so as to combine the mains-supplied DC power supply and the load-supplied DC power supply into a pulsating DC power supply.
11. The energy recovery system with an electronic load device according to claim 8, wherein The power conversion unit has: A relay switch module, electrically connected to the bridge circuit module and a device under test, configured to combine the mains-supplied DC power supply and a load-supplied DC power supply, so as to output an input power supply at the test end to the device under test, wherein the input power supply at the test end is an AC power supply or a DC power supply; A DC output conversion module, electrically connected to the relay switch module and the bridge circuit module, configured to convert the high-voltage DC power supply into the load-supplied DC power supply, and output the load-supplied DC power supply to the relay switch module; A double-resonant conversion module, electrically connected to the DC output conversion module, configured to perform power conversion, and output the high-voltage DC power supply to the DC output conversion module; A boost conversion module, having an input end, the boost conversion module is electrically connected to the device under test, the device under test outputs the output power supply at the test end to the boost conversion module, and the boost conversion module boosts the output power supply at the test end to output the high-voltage DC power supply to the double-resonant conversion module; A first control module, electrically connected to the boost conversion module, configured to control the operation of the boost conversion module; A second control module, electrically connected to the double-resonant conversion module, configured to control the operation of the double-resonant conversion module; A third control module, electrically connected to the DC output conversion module, for controlling the operation of the DC output conversion module; And A main control module, electrically connected to the first control module, the second control module, the third control module and the relay switch module, for controlling the output power to be output by the electronic load device, and controlling the boost conversion module, the double-resonant conversion module and the DC output conversion module through the first control module, the second control module and the third control module, so as to boost the power supply output from the test end, and convert it into the high-voltage DC power supply according to the load conversion efficiency, and then convert it into the DC power supply for the load and output it to the relay switch module.
12. The energy recovery system with an electronic load device according to claim 11, characterized in that, The power conversion unit further includes a current feedback unit, which is electrically connected to the input ends of the third control module and the boost conversion module, for confirming whether the electronic load device reaches the output power to be output according to the power supply output from the test end and the DC power supply for the load.
13. The energy recovery system with an electronic load device according to claim 11, wherein The relay switch module is electrically connected to the device under test through a connection terminal.
14. The energy recovery system with an electronic load device according to claim 11, wherein, When the device under test is not started, the power input from the mains end is converted by the mains processing unit to output the mains-supplied DC power supply to the device under test and the power conversion unit, for starting the device under test and the power conversion unit, so that the device under test can output the power supply output from the test end to the power conversion unit, so that the power conversion unit can boost the power supply output from the test end, and convert it into the high-voltage DC power supply according to the load conversion efficiency, and then convert it into the DC power supply for the load and output it to the relay switch module.