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Title:
METHOD FOR CORRECTING ZERO POINT OF RESOLVER IN POLYPHASE MOTOR
Document Type and Number:
Japanese Patent JP2005176546
Kind Code:
A
Abstract:

To improve precision in zero point correction of resolver of a polyphase motor.

When a first DC current is supplied to coils of a three-phase motor in a first energization (steps S2 to S4), rotation of the motor is locked at either of a plurality of electrical angles (180° or 0°) where torque becomes zero. When a second DC current is subsequently supplied to the coils of the motor in a second energization (steps S5 to S6), rotation of the motor is locked at an prescribed electrical angle (210°) where the torque becomes zero. The electrical angle appearing when the second energization is started is assured to be either of 180° or 0° by performing the second energization after the first energization, so that the motor is surely locked at the electrical angle of 210°, even if there is an electrical angle (30°) where torque becomes zero in addition to the electrical angle of 210°. Thus, the zero point of the resolver can be precisely corrected by comparing the electrical angle of 210° with output of the resolver.


Inventors:
MUKAI YOSHINOBU
TAKAGI MASANORI
TSURUMIYA OSAMU
NAKANO YASUHIRO
HORII HIROAKI
MORISHITA FUMIHIRO
Application Number:
JP2003000415216
Publication Date:
June 30, 2005
Filing Date:
December 12, 2003
Export Citation:
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Assignee:
HONDA MOTOR CO LTD
International Classes:
H02P29/00; H02P7/00; (IPC1-7): H02P7/00
Attorney, Agent or Firm:
落合 健
仁木 一明