A brushless motor control apparatus calculates the number of rotations of an engine based on a cycle of zero-cross points of the phase voltage induced to a sub-coil of a three-phase brushless motor. When the number of rotation of the engine is smaller than the first number of rotations, before it becomes impossible to detect the zero-cross points, the control state of the three-phase brushless motor is changed from the state of phase control by a phase control regulator unit with respect to the AC output voltages to the state of interphase short circuit of motor coils by a short regulator unit. When the number of rotations of the engine exceeds the first number of rotations and the phase voltage becomes the voltage level such that the zero-cross points can be detected, the control state is changed again to the state of phase control by the phase control regulator unit.
Brushless motor control apparatus and brushless motor control method
2016-01-26
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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