MOTOR DRIVE DEVICE, MOTOR DRIVE METHOD, RECORDING MEDIUM, AND ENGINE COOLING DEVICE

WIPO Patent Application WO/2018/198734

A1

Provided is a motor drive device for driving a motor, wherein: the motor drive device includes a control unit for outputting a drive signal that causes the motor to be driven, a drive unit for supplying the motor with a current supplied from an external power source on the basis of the drive signal outputted from the control unit, and a current detection unit for detecting the current flowing through the drive unit; and the control unit, after having outputted a drive signal for causing the motor to be driven at a first rotational speed, calculates the torque generated in the motor and the rotational speed of the motor from the current value of the current detected by the current detection unit, compares the calculated value of the calculated torque with a limit value for the torque at the calculated rotational speed, and outputs a drive signal that causes the motor to be driven at a second rotational speed lower than the first rotational speed if the calculated value is higher than the limit value.

WO/2002/067405	REGULATING DEVICE FOR A MOTOR
WO/2009/132862	DEVICE AND METHOD FOR OPERATING A TECHNICAL UNIT, COMPRISING AN ELECTRIC DRIVE MACHINE
JP2004166435	TEMPERATURE PROTECTION DEVICE FOR POWER CONVERSION DEVICE FOR INTERMITTENT OPERATION MOTOR

TAKADA TOMOYUKI (JP)

PCT/JP2018/014848

November 01, 2018

April 09, 2018

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NIDEC CORP (JP)

H02P29/02; H02P6/18; H02P29/68

JP2010183796A	2010-08-19
JP2016052203A	2016-04-11
JP2007225226A	2007-09-06
US20050287010A1	2005-12-29

KOHO IP LAW (JP)

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