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Energy feedback type AC/DC electronic load simulator

A technology that is universal for AC and DC and energy feedback is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables. It can solve the problems of large power consumption, poor versatility of electronic loads, and inability to simulate linear loads. It achieves low self-loss, The effect of high power factor

Active Publication Date: 2006-10-18
XIAN ACTIONPOWER ELECTRIC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an electronic load solution in order to overcome the shortcomings of the existing electronic loads, such as the lack of versatility, the inability to simulate linear loads with any power factor, and large power consumption.

Method used

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  • Energy feedback type AC/DC electronic load simulator
  • Energy feedback type AC/DC electronic load simulator
  • Energy feedback type AC/DC electronic load simulator

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Embodiment Construction

[0023] The working principle of the present invention is that the power conversion circuit of the simulation device is composed of an input-output full-bridge PWM inverter with a common DC bus as the core, and the input full-bridge PWM inverter is connected to the power supply under test through an input filter inductor to form an electronic load. Load characteristic simulation part. The output full-bridge PWM inverter is connected to the power grid through the isolation transformer and the output filter inductor to form the energy feedback part of the electronic load.

[0024] For the load characteristic simulation part of the electronic load, when the DC bus voltage is high enough (its value should be at least greater than the peak value of the tested power supply voltage), the amplitude and waveform of the input filter inductor current, that is, the simulated load current, are completely acceptable. controlled. The load current waveform command generation unit adopts phase...

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Abstract

The energy feedback type AC / DC electronic load simulator consists of two stages of PWM inverters with common DC bus as key parts. The input PWM inverter stage is connected through input filter inductor to the tested power source to constitute the load characteristic simulating part of electronic load; the output PWM inverter stage is connected through the isolating transformer and output filter inductor to the power network to constitute the energy feedback part of electronic load; and the load characteristic simulating part and the energy feedback part are independently controlled. The load characteristic simulating has single instantaneous current value control mode controlling the input load current amplitude and waveform, and the energy feedback has current and voltage double closed-loop control mode including phase lock loop to control the current waveform in the output network side and the bus voltage in the DC side. The present invention has small loss and high network side power factor.

Description

technical field [0001] The invention relates to an electronic load simulation device, in particular to an energy-saving AC / DC universal electronic load simulation device which realizes arbitrary load characteristic simulation and energy feedback grid through a power electronic conversion circuit. Background technique [0002] Various types of AC power supplies and DC power supplies need to be tested on-load during the R&D process or before the products leave the factory to test the electrical performance of the power supply. There are two ways to form the load: one is composed of passive components such as resistors, inductors, capacitors, etc. This is the most traditional form of load. This kind of load has the following disadvantages: [0003] 1) It is inconvenient to adjust the parameters of the load size, and it is not easy to control accurately; [0004] 2) The stability of the load size and parameters is not high, and it changes with the change of the load temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00H02M1/10
Inventor 白小青石涛卢家林张建荣
Owner XIAN ACTIONPOWER ELECTRIC
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