VECTOR CONTROL DEVICE, INVERTER EMBEDDING SAME, AND INVERTER-MOTOR SET DEVICE EMBEDDING SAME

WIPO Patent Application WO/2015/156003

A1

Provided is a vector control device that prevents a situation requiring a restart from occurring and can perform a stable torque control operation even when DC voltage fluctuation occurs. A voltage modulation factor calculation unit (11a) of a command calculation unit (11) calculates a voltage modulation factor supplied to a motor, and when the voltage modulation factor (Kh) exceeds a first modulation factor command (Kh1*), a field-weakening control is performed by the operation of a d-axis current modification calculation unit (11b) of the command calculation unit (11). When the voltage modulation factor (Kh) exceeds a second modulation factor command (Kh2*), a torque command modification calculation unit (11c) of the command calculation unit (11) controls a torque command so that the voltage modulation factor (Kh) does not exceed the second modulation factor command (Kh2*). This makes it possible to perform an appropriate field-weakening control and avoid a situation in which an overcurrent trip occurs and a restart is required due to DC voltage fluctuation.

TOBARI KAZUAKI (JP)
KURAHASHI MITSURU (JP)

PCT/JP2015/050191

October 15, 2015

January 06, 2015

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HITACHI IND EQUIPMENT SYS (JP)

H02P21/00; H02P27/04

JP2009268304A	2009-11-12
JP2005110354A	2005-04-21
JP2012065463A	2012-03-29
JP2004101151A	2004-04-02
JP2000341990A	2000-12-08

KAICHI IP (JP)
Patent business corporation development-of-knowledge international patent firm (JP)

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