MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME

Title:

MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME

Document Type and Number:

WIPO Patent Application WO/2018/230541

Kind Code:

A1

Abstract:

[Problem] To provide a vector control-type motor control device that compensates for inverter dead time without requiring a tuning operation, improves current waveform distortion and current control responsiveness, and suppresses noise, vibrations and torque ripples. [Solution] Disclosed is a vector control-type motor control device that calculates a q-axis control assist command value, calculates dq-axes current command values from the control assist command value, converts the dq-axes current command values into three-phase duty command values, and drives and controls a three-phase brushless motor with a PWM-control inverter, wherein: three-phase dead time reference compensation values are calculated on the basis of a motor rotation angle; three-phase dead time compensation values are obtained by subjecting the three-phase dead time reference compensation values to temperature correction; and inverter dead time compensation is performed by adding the three-phase dead time compensation values to respective three-phase voltage command values after being subjected to dq-axes space vector modulation.

Inventors:

TAKASE HIROAKI (JP)
MINAKI RYO (JP)
SAWADA HIDEKI (JP)
SUGAWARA TAKAYOSHI (JP)

Application Number:

PCT/JP2018/022337

Publication Date:

December 20, 2018

Filing Date:

June 12, 2018

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

H02P21/06; B62D5/04; B62D6/00; H02P27/08; B62D101/00; B62D119/00

Domestic Patent References:

WO2012169311A1	2012-12-13
WO2017098840A1	2017-06-15

Foreign References:

JP2007110827A	2007-04-26
JP2009165279A	2009-07-23
JP4681453B2	2011-05-11
JP2015171251A	2015-09-28
JP2017070066A	2017-04-06

Other References: