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Switched Capacitor Multilevel Converter and Multilevel Inverter

A switched capacitor and multi-level technology, which is applied in the direction of output power conversion devices, electrical components, and AC power input conversion to DC power output, can solve the problems of increasing the complexity of energy storage management systems and equalization circuits, and achieve improvement System stability, cost reduction, and the effect of reducing output harmonics

Active Publication Date: 2019-03-01
FUHUADE ELECTRONICS DONGGUAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a large number of stacked energy storage devices will greatly increase the complexity of the energy storage management system and equalization circuit

Method used

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  • Switched Capacitor Multilevel Converter and Multilevel Inverter
  • Switched Capacitor Multilevel Converter and Multilevel Inverter
  • Switched Capacitor Multilevel Converter and Multilevel Inverter

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Embodiment Construction

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In order to alleviate the problems caused by the increased complexity of the energy storage management system and equalization circuit in the prior art, the present invention provides a switched capacitor multilevel converter and a multilevel inverter with the switched capacitor multilevel converter , to double the voltage amplitude and the number of levels that can be output using switched capacitor technology. Therefore, not only the cost of the energy storage system of the variable frequency drive is greatly reduced, but also the output harmonics of the frequency converter are effectively reduced.

[0025] Since the multilevel inverter provided by the present invention includes the switched capacitor multilevel converter provided by the present invention, in order to reduce unnecessary repetition, when the multilevel inverter ...

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Abstract

The present invention provides a switched capacitor multilevel converter and a multilevel inverter. The switched capacitor multilevel converter includes: a first switching device; a second switching device, the first input of the first switching device The / output end is connected to the second input / output end of the second switching device; at least one branch circuit, each branch circuit includes a third switching device, a capacitor, and a fourth switching device, and all capacitors of the at least one branch circuit connected in series with the first input / output terminal of the first switching device and the second input / output terminal of the second switching device; in each of the branch circuits, the third switching device, the fourth The switching devices each include a first input / output end and a second input / output end, the first input / output end of the third switching device is connected to the second input / output end of the fourth switching device, the capacitor one end. The invention can obtain the advantages of simplified structure, stable system, reduced cost and the like.

Description

technical field [0001] The invention relates to the technical field of voltage conversion, in particular to a switched capacitor multilevel converter and a multilevel inverter. Background technique [0002] Compared with traditional bridge inverters, multilevel inverters can reduce the rating of electrical components and improve the quality of output power. Since there is no bulky and heavy filter inductor, the multilevel inverter integrated with switched capacitor technology can easily achieve the purpose of boosting voltage and increasing power density. Currently, most energy storage technologies are based on: electrochemical cells, supercapacitors and fuel cells. In order to provide sufficient voltage to drive most electrical loads, these energy storage devices need to be connected in series with each other. Since the energy storage device connected in series is essentially a multi-level voltage source, a multi-level output can be generated simply by using a bidirection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02M7/5387
CPCH02M7/483H02M7/5387H02M7/4835
Inventor 郑家伟陈宇澄方逸之
Owner FUHUADE ELECTRONICS DONGGUAN CO LTD
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