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Three-port direct-current converters and control method and circuit thereof

A DC converter and three-port technology, applied in the direction of DC power input conversion to DC power output, DC power supply parallel operation, control/regulation system, etc., can solve the problems of low power density, high cost, and large number of components, and achieve The control is simple, the cost is low, and the effect of centralized control is realized

Active Publication Date: 2020-02-28
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the number of devices, large volume, low power density, high cost, and complicated control.

Method used

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  • Three-port direct-current converters and control method and circuit thereof
  • Three-port direct-current converters and control method and circuit thereof
  • Three-port direct-current converters and control method and circuit thereof

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

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Abstract

The invention discloses six three-port direct-current converters and a control method and circuit thereof. The converter is characterized in that a drain electrode of a switch tube S1 is connected with a cathode of a diode D2, a source electrode of the switch tube S1 is connected with a cathode of a diode D1 and one end of an energy storage inductor L, and an anode of the diode D1 is connected with a source electrode of a switch tube S2. The control method comprises steps that a sampling value and a reference value of an input voltage of the direct-current converter are compared with sawtoothwaves after error amplification, and a driving signal is generated to control the S1; a sampling value and a reference value of the load voltage of the direct-current converter are compared with the sawtooth waves after error amplification, and a driving signal is generated to control the S2. The control circuit is characterized in that output ends of two error amplifiers are connected with inputends of two comparators respectively, the sawtooth waves are further inputted into two comparators, and output ends of the two comparators are used for being connected with a grid electrode of the S1and a grid electrode of the S2 respectively. The converters and the control method and circuit thereof are advantaged in that the power management and control among an input source, energy storage equipment and the load can be realized by adopting a single converter.

Description

technical field [0001] The invention belongs to the technical field of power electronics, in particular to a 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. In addition to the power supply in areas without grids, independently operated new energy power generation systems are also widely used in the power supply of new energy vehicles and independent LED lighting systems. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02J1/12
CPCH02J1/12H02M3/155
Inventor 田庆新周国华冷敏瑞刘枘君
Owner SOUTHWEST JIAOTONG UNIV
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