Title:
電力変換装置および電力変換装置の制御方法
Document Type and Number:
Japanese Patent JP6421014
Kind Code:
B2
Abstract:
Provided is a power conversion device capable of achieving a stable and highly precise velocity control characteristic even during a regenerative operation in a low-velocity region. This power conversion device is equipped with: a velocity estimation operation unit (5) that outputs an estimated velocity value É 1 ^ for an induction motor (1); an output frequency operation unit (7) that outputs an output frequency value É 1 * , which is an addition value obtained by adding the estimated velocity value É r ^ and the sliding frequency value É s * of the induction motor; and a velocity command adjustment operation unit (9) that, when the output frequency value É 1 * is equal to or less than a fixed value É l * 1v1 , controls the velocity command value É s * or the estimated velocity value É r ^ of the induction motor (1) so as to make the output frequency value É l * equal to or greater than the fixed value É l * 1v1 .
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Inventors:
Kazuaki Tohari
Yoshinao Iwaji
Satoshi Ibori
Yusaku Onuma
Hiroyuki Tomita
Atsuhiko Nakamura
Yoshinao Iwaji
Satoshi Ibori
Yusaku Onuma
Hiroyuki Tomita
Atsuhiko Nakamura
Application Number:
JP2014220958A
Publication Date:
November 07, 2018
Filing Date:
October 30, 2014
Export Citation:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
H02P21/18
Domestic Patent References:
| JP11098897A | ||||
| JP2007104777A | ||||
| JP2000312496A |
Attorney, Agent or Firm:
Yuji Toda