Motor control device

Details Motor control device Motor control device

2011-05-03

2011-05-03

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S800000, C318S799000, C318S798000

Reexamination Certificate

active

07936146

ABSTRACT:
A motor control device has: a motor current detecting portion for detecting, based on a current flowing between an inverter and a direct-current power supply, a motor current flowing through a three phase motor; a specified voltage value producing portion for producing a specified voltage value based on the motor current; a specified voltage value holding portion for holding an earlier specified voltage value outputted from the specified voltage value producing portion; and a specific period setting portion for setting a specific period based on a voltage difference between two of U-phase, V-phase, and W-phase voltages. Outside the specific period, the motor is controlled based on the specified voltage value outputted from the specified voltage value producing portion, and, within the specific period, the motor is controlled based on the specified voltage value held by the specified voltage value holding portion.

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Hida et al., “Position Sensorless Vector Control for Permanent Magnet Synchronous Motors Based on Maximum Torque Control Frame”, Collection of the Lecture Treatises, 2006. Presented at the 2006 Annual Conference of the Industry Applications Society of the Institue of Electrical Engineers of Japan; pp. 385-388 (I-385-I-388); Aug. 2006.

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