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Using a micromachined magnetostatic relay in commutating a DC motorA DC motor is commutated by rotating a magnetic rotor to induce a magnetic field in at least one magnetostatic relay in the motor. Each relay is activated in response to the magnetic field to deliver power to at least one corresponding winding connected to the relay. In some cases, each relay delivers power first through a corresponding primary winding and then through a corresponding secondary winding to a common node. Specific examples include a four-pole, three-phase motor in which each relay is activated four times during one rotation of the magnetic rotor.
Document ID
20080005088
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Tai, Yu-Chong
Wright, John A.
Lilienthal, Gerald
Date Acquired
August 24, 2013
Publication Date
March 30, 2004
Subject Category
Electronics And Electrical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-6,713,908
Patent Application
US-PATENT-APPL-SN-281831

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