Motor drive apparatus
AssigneeRohm Co., Ltd.
InventorsTetsuo Yamato, Noboru Takizawa
Life of this patent
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Abstract
A motor drive apparatus comprises: a position signal generation portion that generates a position signal corresponding to a rotor position of a brushless DC motor; and a logic portion that when starting the brushless DC motor, disposes a non-energizing period immediately after starting forced commutation at a phase switchover timing corresponding to a predetermined forced commutation frequency and performs energizing control of the brushless DC motor such that usual commutation is started at a phase switchover timing corresponding to the position signal that is generated during an inertial rotation of the rotor.
Claims13
A motor drive apparatus comprising:
- a position signal generation portion that generates a position signal corresponding to a rotor position of a brushless DC motor;
- and
- a logic portion that when starting the brushless DC motor, disposes a non-energizing period immediately after starting forced commutation at a phase switchover timing corresponding to a predetermined forced commutation frequency and performs energizing control of the brushless DC motor such that usual commutation is started at a phase switchover timing corresponding to the position signal that is generated during an inertial rotation of the rotor.
Dependencies are inferred from the claim text.