Title:
ブラシレスモータの駆動装置
Document Type and Number:
Japanese Patent JP5960008
Kind Code:
B2
Abstract:
The present relates to a sensorless driving apparatus and a sensorless driving method for a brushless motor. In a state that the brushless motor is driven by rectangular waves, when the driving apparatus detects that a rotation speed of the brushless motor becomes higher than a predetermined speed and thereafter it detects that an angle of a rotor of the brushless motor becomes a predetermined angle, the driving apparatus switches the drive from rectangular wave drive to sign wave drive. The driving apparatus sets as the predetermined angle an angle at which energizing mode is switched in the rectangular wave drive or an angle at which a motor torque is at a peak value in the rectangular wave drive.
Inventors:
Megumi Hano
Yoshinao Iwaji
Yoshinao Iwaji
Application Number:
JP2012207922A
Publication Date:
August 02, 2016
Filing Date:
September 21, 2012
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
H02P6/18; H02P6/06; H02P6/08; H02P6/17; H02P6/182
Domestic Patent References:
| JP2003111483A | ||||
| JP2004088907A |
Foreign References:
| US20090200971 | ||||
| US20070018599 | ||||
| US6400107 |
Attorney, Agent or Firm:
Moriaki Ogawa
Haruyuki Nishiyama
Mitsuji Sekiya
Tomijio Sasashima
Haruyuki Nishiyama
Mitsuji Sekiya
Tomijio Sasashima