A power loop test circuit and control method of a non-isolated dc/dc converter
A test circuit and converter technology, which is applied in the field of full-load power operation test circuit and control, can solve the problems of high device cost and waste of electric energy, and achieve the effects of cost saving, large cost advantage and avoiding energy waste
Active Publication Date: 2021-04-27
北京清盛电气科技研究院有限公司 +1
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Problems solved by technology
[0004] The present invention aims at the problems of high device cost and electric energy waste in the full-power operation test system, and three types of non-isolated DC / DC converter topologies——buck conversion circuit Buck, boost conversion circuit Boost, buck-boost Based on the amplifier Noninverting buck-boost, a non-isolated DC / DC converter power loop test circuit and control method are proposed
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[0017] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0018] The invention is a test circuit and a control method that can make a DC / DC converter operate according to the designed power under the condition that only a relatively small power unidirectional direct current source is required, so as to examine the performance of the converter under the power. On the basis of the three types of non-isolated DC / DC converter topology, add (or not increase) the auxiliary circuit, and then form the power loop test circuit together with the DC source. In addition to the tested converter device, an auxiliary circuit (T 1 、D 1 or T 2 、D 2 ) and the auxiliary circuit, the circuit where the current Io is located is the auxiliary circuit. In the present invention, the power consumed by the original output to the DC ...
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The invention provides a power loop test circuit and a control method of a non-isolated DC / DC converter, belonging to the technical field of power electronic converters. An auxiliary circuit is set on the non-isolated DC / DC converter circuit to be tested. The auxiliary circuit consists of two parts: one part is the wire connecting the output positive pole and the input positive pole of the conversion circuit, which is called the auxiliary line; the other part is composed of IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) switch tube and diode series half bridge circuit. The auxiliary circuit and the tested DC / DC converter are placed under the same heat dissipation conditions to form a test circuit together. The present invention adopts the scheme of bidirectional DC power supply or energy storage, which greatly saves the cost of the experimental device and avoids energy waste. In the test items of the converter with high current level and power level, the present invention can reflect a large cost Advantage.
Description
technical field [0001] The invention belongs to the technical field of power electronic converters, and in particular relates to a full-load power operation test circuit and a control method of three types of non-isolated DC-DC (DC / DC) converters. Background technique [0002] With the gradual increase of distributed new energy applications, DC systems are getting more and more attention. As a conversion device for direct current energy, the DC / DC converter has been greatly developed in its application. A DC / DC converter converts one form of DC voltage into another form of DC voltage. Various types of non-isolated DC / DC converters are used in photovoltaic, energy storage, and DC load equipment according to the requirements of the application. [0003] In the development process of these power electronic converters, an important test item is the full power operation test of the converter, through which the control performance, temperature rise, efficiency and reliability of...
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IPC IPC(8): G01R31/40
Inventor 冯高辉赵争鸣石冰清魏鹏环魏树生赵晓坦莫昕陆炳兴何国勇郑浩军
Owner 北京清盛电气科技研究院有限公司