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Feedback-type DC electronic load circuit having high voltage and wide voltage input range

A DC electronic load, wide voltage input technology, applied in high-efficiency power electronic conversion, AC power input conversion to DC power output, DC power input conversion to DC power output, etc. Voltage input range, no high frequency transformer isolation, etc.

Active Publication Date: 2019-09-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS WUXI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly three types of research on regenerative DC electronic loads. The first one is composed of BOOST converter and grid-connected inverter DC / AC converter cascaded, but this solution does not have high-frequency transformer isolation, behind the DC / AC converter Connecting to a power frequency transformer to achieve isolation cannot avoid the inherent shortcomings of the power frequency transformer
The second type is composed of cascaded phase-shifted full-bridge converters and grid-connected inverters. Although this type of solution can achieve high-frequency isolation, it is not suitable for wide voltage input ranges.
The third type is composed of BOOST converter, phase-shifted full-bridge converter and grid-connected inverter. The switch cannot be realized in a full range, and the control is relatively complicated, which increases the complexity of the whole machine

Method used

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  • Feedback-type DC electronic load circuit having high voltage and wide voltage input range
  • Feedback-type DC electronic load circuit having high voltage and wide voltage input range
  • Feedback-type DC electronic load circuit having high voltage and wide voltage input range

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] like figure 1 As shown, the present invention proposes a high voltage, wide voltage input range feedback DC electronic load circuit, including an isolated DC / DC converter, a DC / AC converter and a control unit; the DC tested equipment with a wide voltage input range is isolated type DC / DC converter and DC / AC converter to achieve grid-connected energy feedback; the isolated DC / DC converter adopts a two-stage structure, including two-phase interleaved parallel BOOST converter 1 and LLC-DCX converter 2, DC / DCX The AC converter adopts T-type inverter 3, and the control unit includes sampling circuit and DSP digital control.

[0055] The first stage of the two-stage isolated DC / DC converter includes a first switch tube Q 1 , the second switching tube Q 2 , the first diode D 1 , the second diode D 2 , the third diode D 3、 The first inductance L1 a...

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PUM

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Abstract

The invention discloses a feedback-type DC electronic load circuit having a high voltage and wide voltage input range. The feedback-type DC electronic load circuit comprises an isolation DC / DC converter, a DC / AC converter and a control unit, wherein DC tested equipment having the wide voltage input range is used for achieving grid-connected feedback energy by the isolation DC / DC converter and theDC / AC converter, the isolation DC / DC converter employs a two-stage structure and comprises a two-phase staggered parallel BOOST converter and an LLC-DCX converter, the DC / AC converter employs a T-typeinverter, and the control unit comprises a sampling circuit and a DSP digital control platform. The feedback-type DC electronic load circuit is applicable to discharging test of various battery combinations and test of a virtual load of a natural energy source (a solar cell array and wind energy power generation), has the advantages of wide input voltage range, high highest input voltage, high-frequency isolation, high efficiency, energy saving, environmental friendliness and the lie and has the advantages which are not possessed by an existing circuit.

Description

technical field [0001] The invention belongs to the technical field of power electronic converters, in particular to a feedback type DC electronic load circuit with high voltage and wide voltage input range. Background technique [0002] The energy crisis in today's society is becoming more and more serious, and energy recovery and reuse can effectively alleviate the energy crisis. With the rapid development of national defense, aviation, communication, transportation and other fields, energy storage devices such as batteries have also been widely developed. Battery discharge testing and aging testing are essential links. Traditional tests use energy-consuming loads, which waste power and generate a lot of heat and noise. The regenerative DC electronic load can maximize the recycling of the electric energy absorbed by the electronic load, which greatly reduces the cost, and also complies with the national policy of energy conservation and environmental protection in today's...

Claims

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Application Information

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IPC IPC(8): H02M7/537H02M3/335H02J3/38H02J3/01
CPCH02J3/01H02J3/38H02M3/3353H02M7/537H02M1/0058Y02B70/10Y02E40/40
Inventor 张之梁何铭协徐佳华李想朱靖任小永魏小忠陈乾宏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS WUXI RES INST
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