Controller for driving a permanent magnet type synchronous motor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNorihiko Akao
Life of this patent
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Abstract
A controller for driving permanent magnet type synchronous motor. A motor terminal voltage or IPM (intelligent power module) input voltage necessary to achieve a target operating point is computed based on torque command and motor revolution. When the computed voltage exceeds an actual battery voltage, a booster is inserted between the battery and IPM, and the battery voltage, after being boosted, is applied between the direct current terminals of the IPM. Since the motor terminal voltage can be made so as to not exceed the boosted voltage even if the motor terminal voltage rises along with a rise in revolution and speed voltage, field weakening control becomes unnecessary.
Claims4
A driving controller for controlling a permanent magnet type synchronous motor using a power converter that is connected between a battery and the permanent magnet type synchronous motor and converts a battery voltage to a motor current;
- said driving controller comprising:
- a booster for boosting said battery voltage before being supplied to said power converter according to a command;
- judgment means for judging, based on a detected value of said battery voltage, whether or not a target operating point for said permanent magnet type synchronous motor is in an output range thereof;
- and
- extending means for extending, when it has been determined by the judgment means that the target operating point is not in the output range, said output range so as to cover the target operating point by issuing the command to said booster according to the location of said target operating point.
Dependencies are inferred from the claim text.