To control motor torque in a good timing for torque control.
A motor 16 which drives a compressor 17 as a load is drive-controlled by an inverter portion 15. When the number of revolutions detected by a number-of-revolutions-of-motor detecting portion 25 and a differential pressure between the condensation pressure and the evaporating pressure of the compressor 17 which is detected by a pressure detecting portion 27, indicate that there is a large fluctuation in rotor position detection intervals (that is, the rotor position can be detected with accuracy), a microprocessor 20 inputs a rotor position signal detected by a rotor position detecting portion 19 and reads the pattern data corresponding to the mechanical position of the rotor indicated by the inputted rotor position signal from a memory 24, and then provides a signal for torque control based on the read-out pattern to the inverter portion 15 via a base driver portion 18. The inverter portion 15 drives the motor 16 based on the signal provided thereto.
| JP2000224886A | 2000-08-11 | |||
| JP2002044985A | 2002-02-08 | |||
| JPH11241682A | 1999-09-07 | |||
| JPH11324930A | 1999-11-26 | |||
| JP2001304703A | 2001-10-31 | |||
| JP2001295769A | 2001-10-26 |
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Nobuo Arakawa
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