Title:
POWER CONVERSION DEVICE FOR INDUCTION MACHINE, SECONDARY TIME CONSTANT MEASUREMENT METHOD AND SPEED CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2016/199444
Kind Code:
A1
Abstract:
In order to accurately measure a secondary time constant of an induction machine by a power conversion device, this secondary time constant measurement method for an induction device is used in a control device that controls the magnitude and frequency of the output voltage of a power converter for driving the induction machine. A control device is provided with a d-axis current control unit and a q-axis current control unit which control the output current of a power conversion device for driving the induction machine in accordance with a d-axis current command value, the d-axis being the magnetic flux axis of a rotating magnetic field coordinate system, and a q-axis current command value, the q-axis being the torque axis of the rotating coordinate system. The secondary time constant of the induction machine is measured from the attenuation waveform of the output of the q-axis current control unit when the q-axis current command value is set to zero and, during rotation of the induction machine, the d-axis current command value is step-changed to a nonzero value.
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Inventors:
KAMIYA AKINORI (JP)
TOBARI KAZUAKI (JP)
IWAJI YOSHITAKA (JP)
ONUMA YUSAKU (JP)
TOBARI KAZUAKI (JP)
IWAJI YOSHITAKA (JP)
ONUMA YUSAKU (JP)
Application Number:
PCT/JP2016/053122
Publication Date:
December 15, 2016
Filing Date:
February 03, 2016
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P21/16
Foreign References:
JP2001268997A | 2001-09-28 | |||
JP2000342000A | 2000-12-08 | |||
JPH07298697A | 1995-11-10 | |||
JP2010011638A | 2010-01-14 | |||
JPH0843462A | 1996-02-16 |
Other References:
See also references of EP 3309953A4
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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