Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/131086
Kind Code:
A1
Abstract:
Provided is a power conversion device used in an electric motor drive system having inverters connected in parallel, said power conversion device identifying a laid cable impedance by using a test pulse and optimizing a cross current suppression control gain, thereby eliminating a coupling reactor. An electric motor drive system 1 has A- and B-bank inverters 20A, 20B, the outputs of which are connected in parallel, wherein: before operation, a test pulse is output to the A- and B-bank inverters from a drive control unit 30 equipped with a PWM controller 33; a laid cable impedance is identified from the DC voltage Vdc and the response currents IA, IB obtained when the test pulse is output; an adjustment gain is calculated from the ratio of the laid cable impedance to a specified cable impedance and is optimized by multiplying a proportional gain KP; an on-delay value based on the already optimized adjustment gain GL×KP is calculated during the operation; and a gate signal is output that is corrected by the on-delay value calculated for the corresponding inverter gate.
Inventors:
MORITO CHIKARA
SUZUKI HIROMITSU
SUZUKI HIROMITSU
Application Number:
PCT/JP2017/000598
Publication Date:
July 19, 2018
Filing Date:
January 11, 2017
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02M7/493; H02M7/48
Foreign References:
| JP2006042407A | 2006-02-09 | |||
| JP2016082661A | 2016-05-16 | |||
| JP2007151213A | 2007-06-14 |
Attorney, Agent or Firm:
INOUE, Masanori (JP)
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