High-gain DC voltage conversion circuit based on superimposed output
A technology for converting circuits and DC voltages, which is applied to output power conversion devices, adjusting electrical variables, converting DC power input to DC power output, etc., and can solve the problem that the boost conversion circuit cannot obtain a boost ratio, the boost ratio is not large, Affect system efficiency and other issues
Active Publication Date: 2021-04-06
YANCHENG INST OF TECH
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Problems solved by technology
[0005] The most typical DC step-up conversion is the Boost conversion circuit. Considering the actual parameters of the boost conversion circuit, its boost ratio is not large, and it can still meet the basic boost requirements when used in a direct-drive wind power generation system. In the system, due to the low output voltage of the photovoltaic cell, the Boost conversion circuit cannot obtain the specified step-up ratio, and its application is limited, which is not good for the photovoltaic power generation system to fully utilize photovoltaic energy. The configuration of a multi-stage boost conversion circuit will affect the efficiency of the entire system. High-gain boost conversion circuit needs to be configured
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[0082] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.
[0083] The high-gain DC voltage conversion circuit with superimposed output such as figure 1 shown. figure 1 , including the input power supply E, the positive terminal of the input power supply E and the first inductor L 1 One end of the third diode D 2_1 The anode is connected; the third diode D 2_1 The cathode and the second inductance L 2 One end of the fourth diode D 2_2 The cathode is connected; the second inductance L 2 The other end of the second diode D 2 The anode of the second triode VT 2 The collector is connected; the second diode D 2 The cathode and the second capacitor C 2 The positive terminal and the positive terminal of the output are connected; the first inductance L 1 The other end of the first capacitor C 1 The positive end of the second capacitor C 2 The negative end of the fourth diode D 2_2 The a...
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The invention discloses a high-gain direct current voltage conversion circuit based on superposition output, which belongs to the technical field of direct current voltage conversion circuits. A high boosting ratio can be obtained by superimposing a boosting circuit superposition unit on a basic boosting chopper circuit as required. Control; the circuit power conversion is completed once, and the circuit obtains a relatively high conversion efficiency, which can be widely used in the adjustment and control of the output voltage in the new energy power generation system. On the basic boost chopper circuit, if several boost circuit superposition units are superimposed as required, the switch tube is turned on and off periodically, and the conversion circuit obtains a much higher boost ratio control than the basic chopper circuit, and the output The voltage can be greatly increased, the power conversion of the circuit does not need to be transferred multiple times, and the power conversion of the circuit is completed at one time, and the conversion efficiency of the circuit is high.
Description
technical field [0001] The invention belongs to the technical field of DC voltage conversion circuits, and in particular relates to a high-gain DC voltage conversion circuit based on superposition output. Background technique [0002] At present, with the intensification of global energy tensions and the intensification of pollution caused by the use of fossil energy, renewable energy power generation systems such as wind energy and solar energy have gradually been widely accepted by the whole society and have been widely used. [0003] However, in the application process of wind energy and solar energy, due to the influence of wind speed, light, climate and other environmental factors, the randomness and volatility of these power generation systems are exposed, and the power system cannot accommodate such fast-changing random power. Applications are severely restricted. How to make renewable energy power generation devices such as wind energy and solar energy generate rela...
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IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 陈荣周锋王如刚卞金洪杨晓冬王银杰
Owner YANCHENG INST OF TECH