MOTOR CONTROL CIRCUIT, MOTOR CONTROL DEVICE, ACTUATOR, AND CONTROL METHOD FOR STEPPING MOTOR

Japanese Patent JP2018033203

A

PROBLEM TO BE SOLVED: To provide a motor control circuit capable of making an accurate loss-of-synchronism determination under various situations.SOLUTION: A motor control circuit 12 comprises an input voltage measuring part 125, a temperature measuring part 128, an inverse electromotive voltage measuring part 126, a determination threshold setting part, and a determination part. The input voltage measuring part 125 measures an input voltage that is inputted to a motor control device 10. The temperature measuring part 128 measures a temperature. The inverse electromotive voltage measuring part 126 measures an inverse electromotive voltage induced by a coil of which the electrification is stopped, among coils of multiple phases. The determination threshold setting part sets a determination threshold of the inverse electromotive voltage on the basis of a measurement result of the input voltage measuring part 125 and a measurement result of the temperature measuring part 128 and on the basis of a determination reference value that is preset for each of subregions that are separated in a matrix shape in accordance with a threshold relating to the input voltage and a threshold relating to the temperature. The determination part makes a determination relating to a loss of synchronism of a stepping motor on the basis of a measurement result of the inverse electromotive voltage measuring part 126 and the set determination threshold of the inverse electromotive voltage.SELECTED DRAWING: Figure 2

SHIMADA AYAKA
TAKADA KAZUO
HIJIKATA HIDETOSHI

JP2016161974A

March 01, 2018

August 22, 2016

Click for automatic bibliography generation  

MINEBEAMITSUMI INC

H02P8/38

JP2014128070A	2014-07-07
JPH11294196A	1999-10-26
JPH1118491A	1999-01-22

Yutaka Tsubaki
Ishikawa Tatsuro
Tsuyoshi Shiraka

Previous Patent: Switchboard

Next Patent: The terminal area of an electric power cable