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High-gain direct current voltage converter with controllable output capacity

A technology of DC voltage and output capacity, used in output power conversion devices, DC power input conversion to DC power output, instruments, etc., can solve problems such as limiting the application of Z-source converters, large current stress on switching tubes and diodes, etc. Achieve the effect of reducing current stress, low capacitance stress, and high output voltage gain

Inactive Publication Date: 2017-08-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the case of large load power, it is necessary to select a capacitor with a large capacitance when designing a traditional Z-source converter, and the current stress of the switch tube and diode is large, which limits the performance of the Z-source converter in high-power applications. application

Method used

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  • High-gain direct current voltage converter with controllable output capacity
  • High-gain direct current voltage converter with controllable output capacity
  • High-gain direct current voltage converter with controllable output capacity

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with specific examples.

[0011] see figure 1 As shown, the high-gain DC voltage converter provided by this embodiment includes a voltage source V i , the first switch tube S 1 , the second switch tube S 2 , the first quasi-Z source module, the second quasi-Z source module, and the output module, the first quasi-Z source module is composed of the first capacitor C 1 , the second capacitance C 2 , the first inductance L 1 , the second inductance L 2 and the first diode D 1 Composed of, the second quasi-Z source module consists of a third capacitor C 3 , the fourth capacitor C 4 , the third inductance L 3 , the fourth inductance L 4 and the second diode D 2 Composed of, the output module consists of a third diode D 3 , the fifth capacitor C 5 and the load R; the voltage source V i The positive pole of the first capacitor C 1 The negative pole, the second inductance L 2 One end and the sec...

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Abstract

The present invention discloses a high-gain direct current voltage converter with controllable output capacity. The converter comprises a voltage source, a first switch tube, a second switch tube, a first quasi-Z source module, a second quasi-Z source module and an output module, the first quasi-Z source module comprises a first capacitor, a second capacitor, a first inductor, a second inductor and a first diode, the second quasi-Z source module comprises a third capacitor, a fourth capacitor, a third inductor, a fourth inductor and a second diode, and the output module comprises a third diode, a fifth capacitor and a load. The high-gain direct current voltage converter with controllable output capacity employs two groups of quasi-Z source modules, has high output voltage gain, reduces the current pressures of the diodes and the switch tubes and improves the power capacity, and the capacitance stresses of the quasi-Z source modules are low so that the circuit does not have the starting impact problem.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a high-gain DC voltage converter with controllable output capacity based on a quasi-Z source bridge structure. Background technique [0002] With the rapid development of industrial production, high-power, high-gain converters are playing an increasingly important role in occasions that require power conversion. The Z-source converter proposed in recent years achieves a larger output voltage at a low duty cycle. However, in the case of large load power, it is necessary to select a capacitor with a large capacitance when designing a traditional Z-source converter, and the current stress of the switch tube and diode is large, which limits the performance of the Z-source converter in high-power applications. application. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies and shortcomings of the prior art, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 陈艳峰陈柱张波丘东元
Owner SOUTH CHINA UNIV OF TECH
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