Title:
CONTROL SYSTEM FOR MOTOR AND ITS CONTROL METHOD
Document Type and Number:
Japanese Patent JP3803659
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control system for a motor in which occurring of noises, vibrations, and performance degradation of a compressor caused by loads generated in compression/expansion strokes of the compressor in driving of the motor can be prevented.
SOLUTION: The control system of the motor comprises a three-phase voltage generation part 22 to output three-phase voltage signals to an inverter part 21 to drive a motor M, a rotary/fixed coordinate conversion part 23 for converting a reference magnetic flux voltage and a reference torque voltage on a rotary coordinate system of the motor M to quantities of a fixed coordinate system and output than to a three-phase voltage generation part 22, and a fixed/rotary coordinate conversion part 24 for converting a two-phase current in the three-phase current flowing in the motor M from the inverter part 21 to a current of a rotary coordinate system. The control system of the motor is constituted of an estimation part 25 for estimating a rotation angle and a speed of a rotor of the motor M from the current flowing in the motor M and a control part 30 for outputting the reference magnetic flux voltage and the reference torque voltage of the motor M, in which errors caused by loads generated during driving of the motor M by inputting the rotation angle and the speed estimated at the estimation part 25, to the rotary/fixed coordinate conversion part 23.
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Inventors:
Jeong Dar Ho
Won Jun Hee
Aoju Yune
Lee Kyun Hoon
Won Jun Hee
Aoju Yune
Lee Kyun Hoon
Application Number:
JP2003189630A
Publication Date:
August 02, 2006
Filing Date:
July 01, 2003
Export Citation:
Assignee:
LG Electronics Co., Ltd.
International Classes:
F04C28/08; F04B49/06; H02P21/00; H02P21/05; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/04; H02P23/16; H02P27/04; (IPC1-7): H02P21/00; F04B49/06; F04C29/10
Domestic Patent References:
| JP2000312499A | ||||
| JP2001037300A | ||||
| JP2001037281A | ||||
| JP2002247899A | ||||
| JP2002262592A | ||||
| JP2002281782A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shimichi Akihisa
Masaya Nishiyama
Jun Tsuruta
Tetsuro Shimada
Shimichi Akihisa
Masaya Nishiyama