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Non-isolated three-port DC converter and its control method and circuit

A DC converter and three-port technology, applied in the direction of converting DC power input to DC power output, circuit devices, battery circuit devices, etc., can solve problems such as difficult parameter design, narrow application range, and complex control, and achieve a wide range of applications , simple control, small voltage limit effect

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

AI Technical Summary

Problems solved by technology

Many literatures have proposed a variety of three-port converter topologies, but these topologies often include three or more switch tubes, the system is costly, bulky, and complex to control, and the voltage between ports has obvious size constraints , the application range is narrow, and the parameter design is more difficult

Method used

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  • Non-isolated three-port DC converter and its control method and circuit
  • Non-isolated three-port DC converter and its control method and circuit
  • Non-isolated three-port DC converter and its control method and circuit

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] figure 1 As shown, the first non-isolated three-port DC converter, including 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 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 source of the energy storage device is connected to the cathode of the energy storage device and the second diode D 2 connected to the anode of the second diode D 2 The cathode of the energy storage inductor L and the second switching tube S 2 The source is connected, the second switch S 2 The drains of the energy storage device V 2 anode and the first diode D 1 The other end of the energy storage inductor L is conne...

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Abstract

The invention discloses six non-isolated three-port direct-current converters and a control method and circuit thereof. The converter is characterized in that a source electrode of a switch tube S1 isconnected with an anode of a diode D2, a cathode of the D2 is connected with a source electrode of a switch tube S2 and one end of an energy storage inductor L, and a drain electrode of the S2 is connected with a cathode of a diode D1. 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 sawtooth wavesafter error amplification, and a driving signal is generated to control the S1; moreover, a sampling value and a reference value of a load voltage of the direct-current converter are compared with 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 the input ends of two comparators respectively, sawtooth waves are further inputted into the two comparators, and output ends of the two comparators are used for being connected with a grid electrode of theS1 and a grid electrode of the S2 respectively. The converters and the control method and circuit thereof are advantaged in that that power management and control among an input source, energy storageequipment and a load can be realized by adopting a single converter.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a non-isolated 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 light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02J7/35H02J7/00
CPCH02J7/0068H02J7/35H02M3/155
Inventor 田庆新周国华张小兵刘枘君
Owner SOUTHWEST JIAOTONG UNIV
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