A brushless motor includes: a stator having a three-phase winding; a rotor that has a permanent magnet; an inverter that supplies an AC current to the three-phase wiring by turning on or turning off a plurality of switching elements; and a control part that controls an ON or OFF state of the plurality of switching elements by switching a power distribution pattern that represents a change of a power distribution state of each phase of the three-phase wiring in response to a rotation of the rotor to a low-speed power distribution pattern in use for a low-speed power distribution control or a high-speed power distribution pattern in use for a high-speed power distribution control, wherein the control part switches the power distribution pattern to the low-speed power distribution pattern in a case where a rotation speed of the rotor is less than a predetermined threshold value, and the control part switches the power distribution pattern to the high-speed power distribution pattern when a state in which a load of the rotor is within a predetermined range is continued for a predetermined period of time in a case where the rotation speed of the rotor is equal to or more than the threshold value.
Brushless motor and control method
2022-04-26
Patent
Electronic Resource
English
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen |
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