Power converter

A power conversion device and converter technology, which are applied in the output power conversion device, the conversion of AC power input into AC power output, the conversion of irreversible AC power input into DC power output, etc., can solve the problem of DC link voltage increase, Resistor short circuit and other problems, to achieve the effect of reducing circuit scale, avoiding power consumption, and reducing manufacturing cost
CN102422518AActive Publication Date: 2012-04-18DAIKIN IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAIKIN IND LTD
Publication Date
2012-04-18

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Abstract

Provided is a power converter which suppresses a current that flows to a capacitor due to a direct current link voltage increase generated by parasitic inductance when a switching a converter is switched in the normal operation. The converter (4) has switching elements, which are connected between a plurality of input terminals (Pr, Ps, Pt) and a direct current power supply line (LH), and switching elements, which are connected between the plurality of input terminals (Pr, Ps, Pt) and a direct current power supply line (LL). A capacitor (C1), a resistor (R1), and a diode (D1) are connected to each other in series between the direct current power supply lines (LH, LL).
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Description

technical field

[0001] The present invention relates to a power conversion device, in particular to a power conversion device with a clamping circuit (also including a buffer) on the output side of the converter. Background technique

[0002] As a typical main circuit configuration of an inverter, a so-called indirect AC power conversion circuit is generally used. In the indirect type AC power conversion circuit, the AC is rectified, converted into DC through a smoothing circuit, and a voltage source converter is used to obtain an AC output.

[0003] On the other hand, as a method of directly obtaining an AC output from an AC voltage, a direct AC power conversion device typified by a matrix converter is known. Since direct AC power conversion devices do not require large capacitors and reactors that smooth voltage ripples generated at commercial frequencies, miniaturization of converters can be expected, and they have recently attracted attention as next-generation power co...

Claims

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