Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-06-28
2009-12-29
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S431000, C318S400020, C318S720000, C318S779000
Reexamination Certificate
active
07638967
ABSTRACT:
A motor control unit includes a power converter unit that energize a motor based on a commutating signal, the motor having a rotor provided with a permanent magnet and a stator having a coil wound thereto; a start-up controller that outputs a commutating signal to the power converter unit during a start-up operation, the commutating signal having a predetermined conductive pattern corresponding to a command rotational speed; a voltage calculator that calculates a voltage of the motor during the start-up operation by applying a parameter for the motor, the command rotational speed, and a current flown in the coil of the motor to a voltage-current equation of the motor; and a determiner that, during the start-up operation, compares a voltage calculated by the voltage calculator and an actual voltage of the motor and that determines occurrence of rotational abnormalities when the actual voltage is lower than the calculated voltage.
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Mingjun, Yi et al. “Design and Verification of a High Saliency ALA Rotor Motor”; Huazhong University of Science & Technology, Wuhan 730074; Dec. 31, 2007; pp. 15-17.
Aizawa Toshimitsu
Hosoito Tsuyoshi
Ip Paul
Kabushiki Kaisha Toshiba
Pillsbury Winthrop Shaw & Pittman LLP
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