DIRECT-TYPE CONVERTER AND METHOD FOR CONTROLLING THE SAME

Title:

DIRECT-TYPE CONVERTER AND METHOD FOR CONTROLLING THE SAME

Document Type and Number:

WIPO Patent Application WO/2010/001739

Kind Code:

A1

Abstract:

In a direct-type converter provided with a converter and two inverters, a common mode current is reduced. The output voltage of a converter (3) is applied to a pair of DC power supply lines (L1, L2). Inverters (4, 5) are connected in parallel between the DC power supply lines (L1, L2). When one inverter (4) operates according to a first zero vector and the other inverter (5) operates according to a second zero vector, the commutation of the converter (3) takes place. The first zero vector and the second zero vector are different from each other. For example, switching elements (Sup1, Svp1, Swp1) on the upper arm side of the one inverter (4) and switching elements (Sun2, Svn2, Swn2) on the lower arm side of the other inverter (5) are all brought into non-conduction, and switching elements (Sun1, Svn1, Swn1) on the lower arm side of the one inverter (4) and switching elements (Sup2, Svp2, Swp2) on the upper arm side of the other inverter (5) are all brought into conduction.

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Inventors:

SAKAKIBARA KENICHI (JP)

Application Number:

PCT/JP2009/061203

Publication Date:

January 07, 2010

Filing Date:

June 19, 2009

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
SAKAKIBARA KENICHI (JP)

International Classes:

H02M5/27

Domestic Patent References:

WO1995024069A1

1995-09-08

Foreign References:

JP2007312589A	2007-11-29
JPH09224393A	1997-08-26
JP2003102131A	2003-04-04
JPH09224393A	1997-08-26
JP2007312589A	2007-11-29
JP2005065356A	2005-03-10
JPH0681514B2	1994-10-12

Other References:

KOJI KATO ET AL.: "Shoatsukei AC/DC/AC Chokusetsukei Denryoku Henkanki no Hakei Kaizen", NATIONAL CONVENTION RECORD I.E.E. JAPAN, vol. 2007, no. 4, 15 March 2007 (2007-03-15), pages 153 - 154, XP008141480
"Improvement of Waveform for a Boost type AC/DC/AC Direct Converter", INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN
AYANO; INABA; OGASAWARA: "Reduction Effect of EMI in Parallel Matrix Converter Systems", JOURNAL OF IEEJ, D, vol. 128, no. 3, 2008, pages 184 - 192
OGASAWARA; FUJITA; AKAGI: "Modeling and Analysis of High-Frequency Leakage Currents Caused by Voltage-Source PWM Inverters", JOURNAL OF IEEJ, D, vol. 115, no. 1, 1995, pages 77 - 83