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Title:
CONTROL DEVICE AND CONTROL METHOD OF VOLTAGE TYPE POWER CONVERSION APPARATUS
Document Type and Number:
Japanese Patent JP2014018015
Kind Code:
A
Abstract:

To provide a control device and a control method of a voltage type power conversion apparatus, capable of improving the problem of variation among capacitors in a configuration simpler than the conventional ones.

The control device of a voltage type power conversion apparatus is configured in which an arm is formed by being provided with a plurality of unit converters each equipped with a capacitor, a leg is configured by serially connecting a first arm and a second arm, an AC terminal is connected to a connection part of the first arm and the second arm, a plurality of legs are provided in which the other terminal of the first arm is made to be a first DC terminal, the other terminal of the second arm is made to be the second DC terminal, the first terminal is made to be on a positive side, and the second terminal is made to be on a negative side, and a pulse is produced for operating the unit converter to operate the unit converter. A frequency of a command pulse is a non-integer multiple of a frequency of a system voltage. A non-integer multiple is 3.5 times, for instance.


Inventors:
YAMAMOTO TAKAYOSHI
ICHINOSE MASAYA
BANDO AKIRA
INOUE SHIGENORI
YOSHIHARA TORU
Application Number:
JP2012000155209
Publication Date:
January 30, 2014
Filing Date:
July 11, 2012
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H02M7/497; H02M7/48
Domestic Patent References:
JPS63174590A1988-07-19
JP2011024390A2011-02-03
JP2002101684A2002-04-05
Attorney, Agent or Firm:
Polaire Patent Service Corporation