Title:
モータ駆動装置及びこれを用いた電気機器
Document Type and Number:
Japanese Patent JP5196811
Kind Code:
B2
Abstract:
A motor drive device of the present invention includes: an output circuit provided with a switch element connected to a motor; a PWM signal generating circuit for generating a PWM signal having a duty corresponding to a ratio between a power supply voltage applied to the motor and a predetermined control voltage; a control circuit for performing on/off control of the switch element according to the PWM signal; and a control voltage generating circuit for generating the control voltage such that the back electromotive voltage of the motor is maintained at a desired value.
Inventors:
Shigeru Hirata
Application Number:
JP2007055821A
Publication Date:
May 15, 2013
Filing Date:
March 06, 2007
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02P7/29; H02P7/291
Domestic Patent References:
| JP200333080A | ||||
| JP9201126A | ||||
| JP2246788A |
Attorney, Agent or Firm:
Shizuo Sano
Hideki Hayashida
Hideki Hayashida