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Two-switch three-port DC converter and its control method and circuit

A DC converter, three-port technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the problems of high cost and complicated control, and achieve low cost, simple control, and centralized realization. effect of control

Active Publication Date: 2021-03-23
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing non-isolated three-port converters often include three or more switch tubes, resulting in high system cost and complicated control

Method used

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  • Two-switch three-port DC converter and its control method and circuit
  • Two-switch three-port DC converter and its control method and circuit
  • Two-switch three-port DC converter and its control method and circuit

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 As shown, the first two-switch three-port DC converter includes: input source V 1 , energy storage device V 2 , the first switch tube S 1 , the second switch tube S 2 , the first diode D 1 , the second diode D 2 , energy storage inductance L, filter capacitor C and load R, where: the first switch tube S 1 The drain and input source of V 1 connected to the anode of the first switching tube S 1 The sources of the second switching tube S are respectively connected to the 2 The drain and energy storage device V 2 connected to the anode of the second switching tube S 2 The sources are respectively connected to the second diode D 2 The cathode of the capacitor is connected to one end of the energy storage inductor L, and the second diode D 2 The anodes of are respectively connected to the energy storage device V 2...

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Abstract

The invention discloses six two-switch three-port DC converters and their control methods and circuits. One of them, switch tube S 1 The source is connected to the switch S 2 the drain, S 2 The source is connected to the diode D 2 The cathode and one end of the energy storage inductor L, D 2 The anode of the diode is connected to D 1 of the cathode. The control method is that the sampling value and reference value of the input voltage of the DC converter are amplified by the error and then compared with the sawtooth wave to generate a driving signal to control the S 1 ; At the same time, the sampling value and reference value of the load voltage of the DC converter are amplified by the error and then compared with the sawtooth wave to generate a driving signal to control S 2 . The control circuit is that the output terminals of the two error amplifiers are respectively connected to the input terminals of the two comparators, and the two comparators also input the sawtooth wave, and the output terminals of the two comparators are respectively used to connect the S 1 and S 2 the grid. The beneficial effect of the invention is that the power management and control between the input source, the energy storage device and the load can be realized by using a single converter.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a two-switch three-port DC converter and its control method and control circuit. Background technique [0002] In recent years, with the aggravation of environmental pollution and energy crisis, the use of solar energy, hydrogen energy, wind energy and other new energy sources for power generation has become a research hotspot. The new energy power generation system is divided into grid-connected operation and independent operation according to whether it is connected to the grid. The independent new energy power generation system is widely used in remote mountainous areas, islands, industrial parks, etc. because of its simple structure and high power supply quality. Power supply in off-grid areas. In addition, the independently operated new energy power generation system is also widely used in the power supply of new energy vehicles and independent LED lighting system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M1/0083
Inventor 田庆新周国华毕强张小兵
Owner SOUTHWEST JIAOTONG UNIV
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