Synchronous permanent-magnet electric motor and vehicle driven by such a motor
First Claim
1. A synchronous electric motor, having a back electromotive force, comprising a rotor of one or more permanent magnets and a wound stator, said motor having a leakage inductance value of at least approximately 10% of the effective inductance of the motor, such that the total inductance of said motor is maximized, so as to minimize at high speed, a defluxing component of stator currents, said defluxing component opposing said back electromotive force, in order to keep a substantially constant voltage at terminals of the motor.
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Abstract
The disclosure relates to a synchronous permanent-magnet electric motor and a vehicle driven by such a motor. The electric motor has a leakage inductance whose value is at least about 10% of the value of its effective inductance. In this way, the total inductance of the motor is maximized so as to optimize the effect of the variation of the phase of the stator current on the variation of the voltage at the terminals of the motor. The invention is notably applicable to an electric vehicle.
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13 Claims
- 1. A synchronous electric motor, having a back electromotive force, comprising a rotor of one or more permanent magnets and a wound stator, said motor having a leakage inductance value of at least approximately 10% of the effective inductance of the motor, such that the total inductance of said motor is maximized, so as to minimize at high speed, a defluxing component of stator currents, said defluxing component opposing said back electromotive force, in order to keep a substantially constant voltage at terminals of the motor.
- 7. A vehicle driven by a synchronous-type electric motor having a rotor of permanent magnets and a wound stator fed by alternating currents generating a rotating field, a control circuit controlling the phase of the alternating current in the stator in order that the voltage supplied to said motor remains constant when the power supplied to said motor is constant, wherein to optimize the efficiency of the phase control, the motor has a leakage inductance value of at least approximately 10% of the effective inductance of the motor.
Specification