Title:
PRE-CHARGE CIRCUIT AND PHOTOVOLTAIC INVERTER
Document Type and Number:
Japanese Patent JP2016226272
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pre-charge circuit which avoids generation of current impact of when a photovoltaic inverter turns on a photovoltaic battery or connects a transmission network, and the photovoltaic inverter.SOLUTION: The pre-charge circuit includes an alternating current power source S, a half-bridge rectifier that is formed by connecting diodes D1 and D2 in series, an auxiliary charging capacitor Caux, a current limiting device and a controllable switch. The pre-charge circuit is connected to a target charging capacitor Cbus to form a voltage doubling rectifier circuit. A direct current side of the half-bridge rectifier is connected in parallel to the target charging capacitor, and an alternating current side of the half-bridge rectifier is connected to one end of the alternating current power source. One end of the auxiliary charging capacitor is connected to any end of the target charging capacitor, and the other end of the auxiliary charging capacitor is connected to the other end of the alternating current power source. The current limiting device is connected in series to respective charging paths of the pre-charge circuit, and the controllable switch is connected in series to the respective charging paths of the pre-charge circuit.SELECTED DRAWING: Figure 2a
Inventors:
YU YANFEI
NI HUA
YANG ZONGJUN
DAI SHANGFANG
HUANG PENGCHENG
NI HUA
YANG ZONGJUN
DAI SHANGFANG
HUANG PENGCHENG
Application Number:
JP2016103805A
Publication Date:
December 28, 2016
Filing Date:
May 25, 2016
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD
International Classes:
H02M7/48
Domestic Patent References:
| JP2013162591A | 2013-08-19 | |||
| JP2005057949A | 2005-03-03 | |||
| JP2008136316A | 2008-06-12 | |||
| JP2012222854A | 2012-11-12 | |||
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| JP2005057949A | 2005-03-03 | |||
| JP2008136316A | 2008-06-12 | |||
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| JP2004208408A | 2004-07-22 | |||
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Attorney, Agent or Firm:
Shimano Public Interest