Permanent magnet synchronous motor controller and electric vehicle controller
First Claim
1. A permanent magnet synchronous motor controller comprising an inverter for supplying an alternating current power converted from a direct current power to a 3-phase permanent magnet synchronous motor through switching elements provided for each of phases;
- a smoothing capacitor for smoothing said direct current power supplied to said inverter; and
a control unit for controlling said inverter by performing ON-OFF control of each of said switching elements, whereinsaid control unit comprises a short circuit transition means for performing precursory ON-OFF control of each of said switching elements prior to performing ON-OFF control of a 3-phase short circuit by said control unit during rotation of said permanent magnet synchronous motor and then performing said 3-phase short circuit.
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Accused Products
Abstract
A permanent magnet synchronous motor controller includes an inverter for supplying an alternating current power converted from a direct current power to a three-phase permanent magnet synchronous motor, having a pair of switching elements for each of said three phases of the motor; a smoothing capacitor for smoothing the direct current power connected to the inverter in parallel; and a control unit for controlling the motor by ON-OFF controlling each of the switching elements of the inverter, which further including a short circuit transition processing portion for changing control to 3-phase short circuit after performing precursory ON-OFF control of each of the switching elements so as to avoid occurrence of over current at an initial period of performing the 3-phase short circuit while the motor is being rotated.
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Citations
14 Claims
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1. A permanent magnet synchronous motor controller comprising an inverter for supplying an alternating current power converted from a direct current power to a 3-phase permanent magnet synchronous motor through switching elements provided for each of phases;
- a smoothing capacitor for smoothing said direct current power supplied to said inverter; and
a control unit for controlling said inverter by performing ON-OFF control of each of said switching elements, whereinsaid control unit comprises a short circuit transition means for performing precursory ON-OFF control of each of said switching elements prior to performing ON-OFF control of a 3-phase short circuit by said control unit during rotation of said permanent magnet synchronous motor and then performing said 3-phase short circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a smoothing capacitor for smoothing said direct current power supplied to said inverter; and
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9. A permanent magnet synchronous motor controller for switching a three-phase permanent magnet synchronous motor in rotating from a free run state to a driven state by an inverter, wherein switching control for canceling out transient current is accompanied by 3-phase short circuit by said inverter from a certain time point determined by a magnetic pole position of said permanent magnet synchronous motor.
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10. An electric vehicle controller for controlling a permanent magnet synchronous motor for driving an electric vehicle using a permanent magnet synchronous motor controller comprising an inverter for supplying an alternating current power converted from a direct current power to a 3-phase permanent magnet synchronous motor through switching elements provided for each of phases;
- a smoothing capacitor for smoothing said direct current power supplied to said inverter; and
a control unit for controlling said inverter by performing ON-OFF control of each of said switching elements, whereinsaid control unit comprises a short circuit transition means for performing precursory ON-OFF control of each of said switching elements prior to performing ON-OFF control of a 3phase short circuit by said control unit during rotation of said permanent magnet synchronous motor and then performing said 3-phase short circuit. - View Dependent Claims (11, 12, 13)
- a smoothing capacitor for smoothing said direct current power supplied to said inverter; and
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14. An electric vehicle controller for controlling a permanent magnet synchronous motor for driving an electric vehicle using a permanent magnet synchronous motor controller for switching a three-phase permanent magnet synchronous motor in rotating from a free run state to a driven state by an inverter, wherein switching control for canceling out transient current is accompanied by 3-phase short circuit by said inverter from a certain time point determined by a magnetic pole position of said permanent magnet synchronous motor.
Specification