Permanent magnet synchronous motor controller and electric vehic

Details Permanent magnet synchronous motor controller and electric vehic Permanent magnet synchronous motor controller and electric vehic

1998-01-23

1999-06-22

Masih, Karen

Electricity: motive power systems

Induction motor systems

Primary circuit control

318700, 318724, 318299, H02P 534

Patent

active

059145820

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.

REFERENCES:
patent: 4002958 (1977-01-01), Akamatsu

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