Title:
モータ駆動装置、モータの制御方法およびそれを用いた冷却装置
Document Type and Number:
Japanese Patent JP4445978
Kind Code:
B2
Abstract:
A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal instructing rotation of the fan motor that is to be driven instructs stoppage of the motor for a predetermined time-period or longer, the lock controller has the lock protection circuit inactive. At an occasion when the control signal has continued to instruct stoppage of the fan motor for a first time-period or longer, a standby controller starts time measurement, and after a further predetermined second time-period has elapsed, makes at least a part of the motor drive device transition to a standby mode.
Inventors:
Chifumi Mishima
Application Number:
JP2007105184A
Publication Date:
April 07, 2010
Filing Date:
April 12, 2007
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02P6/12; H02P3/08; H02P6/06; H02P6/08; H02P6/26; H02P7/29
Domestic Patent References:
| JP2001078484A | ||||
| JP2000069791A | ||||
| JP11308872A | ||||
| JP8140393A | ||||
| JP2002247880A | ||||
| JP7131995A |
Attorney, Agent or Firm:
Sakaki Morishita