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US 2011/0254483 A1Published application
Control of a brushless motor
AssigneeDyson Technology Limited
InventorsYu Chen, Tuncay Celik, Stephen Greetham
Life of this patent
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Abstract
A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, and exciting a winding of the motor with the rectified voltage. The winding is excited in advance of predetermined rotor positions by an advance period that is updated in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
Claims11
A method of controlling a brushless motor, the method comprising:
- rectifying an alternating voltage to provide a rectified voltage;
- exciting a winding of the motor with the rectified voltage, the winding being excited in advance of predetermined rotor positions by an advance period;
- and
- updating the advance period in response to a zero-crossing in the alternating voltage.
1 more element
Dependencies are inferred from the claim text.