POWER CONVERSION DEVICE AND THREE-PHASE ALTERNATING CURRENT POWER SUPPLY DEVICE

Title:

POWER CONVERSION DEVICE AND THREE-PHASE ALTERNATING CURRENT POWER SUPPLY DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/105081

Kind Code:

A1

Abstract:

Provided is a power conversion device (100) that converts power between direct current units (2, 2, 2) and three-phase alternating current (3). Each of a first phase conversion device, a second phase conversion device, and a third phase conversion device (1, 1, 1) comprises a DC/DC conversion circuit (10) and a single-phase power conversion circuit (11). A control unit (12) sets each of the first phase conversion device, the second phase conversion device, and the third phase conversion device (1, 1, 1) so that: when the absolute value of a voltage target value for alternating current is greater than the direct current voltage of each of the direct current units, the DC/DC conversion circuit (10) is operated so that the absolute value of the voltage target value is achieved, and the single-phase power conversion circuit (11) is set to a state in which only the necessary reversal of polarity is performed; and, when the absolute value of the voltage target value is less than the direct current voltage, operation of the DC/DC conversion circuit (10) is stopped and the single-phase power conversion circuit (11) is operated so that the voltage target value is achieved.

Inventors:

AYAI NAOKI (JP)
TAKESHITA KOICHI (JP)

Application Number:

PCT/JP2015/050080

Publication Date:

July 16, 2015

Filing Date:

January 06, 2015

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

H02J7/35; H02M7/48; H02M1/00; H02M7/5387

Foreign References:

JP2011078306A	2011-04-14
JP2012165499A	2012-08-30
JP2000152661A	2000-05-30
JP2012137830A	2012-07-19

Other References: