Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1999-02-11
1999-11-02
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318811, 318778, 318782, 361 23, 361 31, 361 33, B60L 300
Patent
active
059777427
ABSTRACT:
An electric vehicle control device controls an induction motor with a VVVF inverter. A first calculation means calculates a rotor-resistance correction value of the induction motor based on a torque current instruction value for vector control of the induction motor and an actual torque current value. A second calculation means calculates a corrected rotor-resistance value based on the rotor-resistance correction value and a reference rotor-resistance value. A third calculation means calculates an estimated rotor temperature of the induction motor based on the corrected rotor-resistance value, the reference rotor-resistance value, and a temperature coefficient determined by a material of a rotor. The thermal condition of the induction motor is thus monitored in real time without installing a temperature sensor on the induction motor.
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Ip Paul
Kabushiki Kaisha Toshiba
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