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Five-level rectifier

A rectifier, five-level technology, applied in electrical components, AC power input conversion to DC power output, irreversible AC power input conversion to DC power output, etc., to achieve simple control logic, improve harmonics, and simple structure.

Inactive Publication Date: 2015-06-03
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above problems, related fields have tried their best to find a solution, but no applicable method has been developed for a long time.

Method used

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Embodiment Construction

[0030] In order to make the description of the present invention more detailed and complete, reference may be made to the attached drawings and the various embodiments described below. The same numbers in the drawings represent the same or similar elements. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessary limitations on the present invention.

[0031] figure 1 It is a circuit diagram of a one-phase bridge arm of a five-level rectifier 100 according to an embodiment of the present invention. Such as figure 1 As shown, the five-level rectifier 100 includes a first power semiconductor switch S1, a second power semiconductor switch S2, a third power semiconductor switch S3, a fourth power semiconductor switch S4, a fifth power semiconductor switch S5, and a sixth power semiconductor switch S6. , The first DC bus capacitor C1, the second DC bus capacitor C2, the phase capacitor C3, the first diode module D1 and the second diode...

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Abstract

Disclosed herein is a five-level rectifier that includes first, second, third, fourth power semiconductor switches, first and second DC bus capacitors, a phase capacitor, and first, second, third and fourth diode modules. The first, second, third and fourth diode modules are connected in series, the first and second DC bus capacitors are connected in series, and the second and third power semiconductor switches are connected in series. The first diode module is connected to the first DC bus capacitor and the first power semiconductor switch, and the fourth diode module is connected to the second DC bus capacitor and the fourth power semiconductor switch. The phase capacitor has a terminal connected to the first and second power semiconductor switches, and another terminal connected to the third and fourth power semiconductor switches.

Description

Technical field [0001] The present invention relates to a multi-level rectifier, and particularly relates to a five-level rectifier. Background technique [0002] With the continuous development of power electronics and control technology, there is an increasing demand for high-power power electronic converters in many fields, such as motor speed regulation, new energy power generation, and smart grids, and power electronic converters are moving towards high-voltage and high-power , High power density, high reliability and low cost. Compared with two-level, multi-level conversion technology has the advantages of lower harmonics and electromagnetic interference, better power quality, etc., which can effectively reduce the size and cost of the filter; but at the same time, the semiconductor power of the multi-level converter The number of switches has increased significantly, and the control logic is more complicated, which also affects the further promotion and application of mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12
CPCH02M7/217H02M7/487H02M1/08H02M7/4835H02M1/0095H02M7/4837
Inventor 应建平王明张怡甘鸿坚郑剑飞
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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