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US 2010/0060217 A1Published application
Brushless motor starting method and control device
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsTsutomu Ikeda, Takumi Kamiya
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AssigneeAisan Kogyo Kabushiki Kaisha
InventorsTsutomu Ikeda, Takumi Kamiya
Estimating the term…
For starting a three-phase four-pole sensorless brushless motor including a stator having three-phase coils and a four-pole magnet rotor provided in correspondence with the stator, it is arranged to energize any two-phase coils of the three-phase coils in a predetermined energizing sequence; monitor magnetic flux generated in the other one-phase coil; and switch the two-phase coils according to a specific case where the monitored magnetic flux changes to a positive or negative side and in mid-course further changes to an opposite side. For instance, when the specific case is a case where the magnetic flux monitored by first energization changes to the negative side and in mid-course further changes to the positive side, the first energization is immediately stopped and switched to fourth energization by skipping two energizations in the predetermined energizing sequence.
A starting method for starting a three-phase four-pole sensorless brushless motor including a stator having three-phase coils and a four-pole magnet rotor provided in correspondence with the stator, the method comprising the steps of:
A control device of a three-phase four-pole sensorless brushless motor including a stator having three-phase coils and a four-pole magnet rotor provided in correspondence with the stator, the device comprising:
A control device of a brushless motor including a stator having multiple-phase coils and a magnet rotor provided in correspondence with the stator, the device being arranged to:
Dependencies are inferred from the claim text.