Electric energy feedback type electronic load

An electronic load and electric energy feedback technology, applied in the field of power electronics, can solve the problems of narrow input voltage range, low efficiency of the whole machine, small input current, etc., and achieve the effect of simplifying the production process, reducing the temperature of the device, and improving the efficiency of the whole machine

CN104052079AInactive Publication Date: 2014-09-17余名俊
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-09-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an electric energy feedback type electronic load. The input end of the electronic load employs a large-current single-channel access mode. A main circuit mainly comprises a DC / DC conversion circuit, a DC / AC inverter circuit, and an AC filter output circuit, wherein the DC / DC conversion circuit employs a phase-shifted full-bridge circuit to achieve the control of DC input, and boosts DC input voltage. In order to adapt to large-current input, a switching device is formed by parallel connection of a plurality of MOSFETs. The DC / DC conversion circuit is connected with the DC / AC inverter circuit through a DC bus. The DC / AC inverter circuit employs a single-phase full-bridge inverter circuit to control AC output current so as to stabilize the voltage of the DC bus and feeds the AC current back to a power network by a unit power factor. The DC / AC inverter circuit employs an IGBT module as a power device. The AC filter circuit can employ an LC low-pass filter circuit so as to eliminate the higher harmonic waves in the output current of the DC / AC inverter circuit and improve the quality of grid-connected electric energy.
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Description

technical field

[0001] The invention relates to the technical field of power electronics, in particular to a single-channel wide-range input, high-power single-phase grid-connected electric energy feedback electronic load, which can be widely used in aging tests of various power sources, storage batteries and other DC screens Discharge maintenance has the effect of energy recovery and recycling. Background technique

[0002] All kinds of DC power supplies and large-capacity batteries are subject to aging tests during the R&D and production process and before leaving the factory to check the electrical performance and quality of the products. At present, most aging tests still use energy-consuming devices such as resistors as loads, which convert all electrical energy into heat energy consumption, resulting in a large amount of energy waste. At the same time, the traditional energy-consuming loads still have the disadvantages that the parameters cannot be adjusted continuous...

Examples

Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] figure 1

[0039] Referring to Figure 1, different usage methods can be adopted for different applications, where the arrows indicate the direction of energy flow.

[0040] Such as Figure 1A As shown, the 24V / 48V DC power supply 20 has a rated output current of 100A and takes power from the AC power grid 10. Its output can be directly introduced into the input of the 24V / 48V power feedback electronic load 30, and the power feedback electronic load 30 converts the input DC current The AC current with the same frequency and phase as the grid voltage is then incorporated into the single-phase grid, so that most of the input electric energy is fed back into the grid to achieve the effect of electric energy recycling.

[0041] Such as Figure 1B As shown, for the small power 24V / 48V DC power supply with its own current sharing function and direct ...