Title:
MOTOR CONTROL METHOD AND MOTOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/013320
Kind Code:
A1
Abstract:
In a PWM controlled motor, a motor frequency f is detected (S1), and then a PID control Duty value is calculated (S2) and a basic limit Duty value Max.Duty(1) is set (S3). Max.Duty value at -40°C is used in the Max.Duty(1). Motor temperature is detected (S4) and when it exceeds 5°C, the Max.Duty(1) is multiplied by a temperature correspondence coefficient Kt at normal temperature and Max.Duty(2) is set at a constant value (S6). When the motor temperature is lower than 5°C, the Max.Duty(1) is multiplied by a temperature correspondence coefficient Kt corresponding to a detected temperature and the Max.Duty(2) is set (S7). Since correction by the temperature correspondence coefficient is performed with reference to a basic limit Duty value at -40°C, the Max.Duty value is not suppressed more than required even under low temperature and a torque is ensured.
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Inventors:
AMAGASA TOSHIYUKI (JP)
Application Number:
PCT/JP2006/314150
Publication Date:
February 01, 2007
Filing Date:
July 18, 2006
Export Citation:
Assignee:
MITSUBA CORP (JP)
AMAGASA TOSHIYUKI (JP)
AMAGASA TOSHIYUKI (JP)
International Classes:
H02P6/12; H02P7/29; B60S1/08
Foreign References:
| JP2001339981A | 2001-12-07 | |||
| JP2003164005A | 2003-06-06 | |||
| JP2004194418A | 2004-07-08 |
Attorney, Agent or Firm:
TAKANO, Yasushi (Miyamasuzaka-Toho-Estate 602 1-12-12, Shibuy, Shibuya-ku Tokyo 02, JP)
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