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Non-symmetric Z-source half-bridge converter with dual output function

A half-bridge converter, dual-output technology, applied in output power conversion devices, conversion of AC power input to DC power output, electrical components, etc., can solve problems such as reducing system stability, increasing cost and control difficulty, and achieving Overcome the effects of limited input voltage, rich output AC pulse waveform, and high reliability

Active Publication Date: 2014-04-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the corresponding control will increase the cost and control difficulty, and reduce the stability of the system

Method used

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  • Non-symmetric Z-source half-bridge converter with dual output function
  • Non-symmetric Z-source half-bridge converter with dual output function
  • Non-symmetric Z-source half-bridge converter with dual output function

Examples

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Embodiment example

[0016] Such as figure 1 As shown, an asymmetric dual-output Z-source half-bridge converter is characterized in that it includes a DC power supply V d , diode D, first capacitor C 1 , the second capacitance C 2 , the first inductance L 1 , the second inductance L 2 , the first switch tube S 1 , the second switch tube S 2 , the third switch tube S 3 , the first load R 1 and a second load R 2 . An asymmetrical dual-output Z-source half-bridge converter according to the present invention, one port of the Z-source impedance is connected in parallel to the input end formed by a DC power supply and a diode in series, and the other port is connected in parallel to three switching tubes in series Both ends of the bridge arm, and the first switch tube S 1 with the second switch S 2 connection point and the first capacitor C 1 One end is connected to the first load R 1 , the second switch tube and the third switch tube S 3 the connection point and the second capacitor C 2 ...

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Abstract

The invention provides a non-symmetric Z-source half-bridge converter with a dual output function. The converter comprises a direct-current power supply, a diode, a first capacitor, a second capacitor, a first inductor, a second inductor, a first switching tube, a second switching tube, a third switching tube, a first load and a second load. The first inductor, the second inductor, the first capacitor and the second capacitor constitute a Z source impedor. Due to the adoption of the Z source impedor, damage caused by direct connection of the switching tubes is avoided, and a boosting effect can be achieved when direct connection of the switching tubes happens. Two-way output boosting and step-down can be respectively controlled by controlling the switch-on time and duty ratio of the three switching tubes, and symmetry and asymmetry of positive pulses and negative pulses of two-way output voltages can be achieved. Only three switching tubes are used, it is not needed that capacitors are connected on a power supply side in parallel, and dual-way output can be achieved. The non-symmetric Z-source half-bridge converter with the dual output function has the advantages of being high in reliability, wide in output voltage range and rich in output alternating current pulse waveform and is particularly suitable for dual-output electrochemistry power supply devices for electrolysis, electroplating and other electrochemistry aspects.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to an asymmetric double-output Z-source half-bridge converter. Background technique [0002] In a conventional half-bridge converter, the inverter bridge arm is directly connected in parallel with the DC voltage source. When the upper and lower switch tubes of the inverter bridge arm are switched through due to false triggering, a very large current will flow and the switch tube will be damaged. Moreover, the amplitude of the output AC voltage of this type of half-bridge inverter is only half of the input voltage, which belongs to the step-down inverter, and the output voltage range is relatively narrow. In order to increase the amplitude of the output AC voltage, the traditional method is to add a step-up link in the front stage of the inverter, or to connect a transformer at the output end for step-up. In the scheme of adding a step-up link in the front stage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/5387
Inventor 张波张桂东丘东元
Owner SOUTH CHINA UNIV OF TECH
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