POWER CONVERSION DEVICE FOR INDUCTION MACHINE, SECONDARY TIME CONSTANT MEASUREMENT METHOD AND SPEED CONTROL METHOD

WIPO Patent Application WO/2016/199444

A1

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.

JPS61180592	CONTROLLER OF INDUCTION MOTOR
JP2019201530	CONTROL ARRANGEMENT OF PERMANENT MAGNET TYPE SYNCHRONOUS MOTOR
JP5440576	Rotating machine control device

KAMIYA AKINORI (JP)
TOBARI KAZUAKI (JP)
IWAJI YOSHITAKA (JP)
ONUMA YUSAKU (JP)

PCT/JP2016/053122

December 15, 2016

February 03, 2016

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HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)

H02P21/16

JP2001268997A	2001-09-28
JP2000342000A	2000-12-08
JPH07298697A	1995-11-10
JP2010011638A	2010-01-14
JPH0843462A	1996-02-16

See also references of EP 3309953A4

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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