VOLTAGE SMOOTHING CIRCUIT - DAIKIN IND LTD

Title:

VOLTAGE SMOOTHING CIRCUIT

Document Type and Number:

WIPO Patent Application WO/2011/016517

Kind Code:

A1

Abstract:

Even if the internal resistance of a smoothing capacitor varies, voltage higher than or equal to the rated voltage of the smoothing capacitor is prevented from being applied to the capacitor by a simple configuration. Further, the balance of the voltage applied to the smoothing capacitor is maintained by a simple configuration. Specifically, a voltage smoothing circuit (14) is provided with a first smoothing capacitor (C1), a second smoothing capacitor (C2), a balance resistance (R3) and a zener diode (RZ4). The first smoothing capacitor (C1) and the second smoothing capacitor (C2) are connected in series to each other and connected in parallel to a power supply unit (13). The balance resistance (R3) is connected in parallel to the first smoothing capacitor (C1). The zener diode (RZ4) is connected in a current path (I4) that is in parallel to the second smoothing capacitor (C2). The zener diode (RZ4) passes a current through the current path (I4) in one direction when the voltage higher than or equal to zener voltage (Vr4) is applied.

Inventors:

KAGIMURA SUMIO (JP)
HASHIMOTO MASAFUMI (JP)
DOHMAE HIROSHI (JP)
DOI HIROTAKA (JP)
SATO TOSHIAKI (JP)
ISHIZEKI SHINICHI (JP)

Application Number:

PCT/JP2010/063286

Publication Date:

February 10, 2011

Filing Date:

August 05, 2010

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
KAGIMURA SUMIO (JP)
HASHIMOTO MASAFUMI (JP)
DOHMAE HIROSHI (JP)
DOI HIROTAKA (JP)
SATO TOSHIAKI (JP)
ISHIZEKI SHINICHI (JP)

International Classes:

H02M7/06; H02M7/538

Foreign References:

JPH01169516A	1989-07-04
JP2008054363A	2008-03-06
JPH06237193A	1994-08-23
JPH10323042A	1998-12-04
JPH07322491A	1995-12-08
JPH06276675A	1994-09-30
JPH01110060A	1989-04-26
JP2006333622A	2006-12-07
JPH0523527U	1993-03-26
JP2003088144A	2003-03-20
JPH01169516A	1989-07-04

Other References: