Method for operating sensorless and brushless motors
AssigneeFord Global Technologies, LLC
InventorsJames L. Thompson, Kyi-Shin Shiah
Life of this patent
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Abstract
A method of aligning a sensorless brushless polyphase DC motor including aligning a rotor to a known stopped position with respect to at least one coil during a shut-down of said motor wherein a voltage is applied to one or more coils in a timed sequence of voltage application steps; and, starting said rotor from said known stopped position, wherein a voltage is applied to one or more coils in a timed sequence of voltage application steps.
Claims20
A method of aligning a sensorless brushless polyphase DC motor comprising:
- aligning a rotor comprising said motor to a known stopped position with respect to at least one coil comprising said motor during a shut-down of said motor wherein a voltage is applied to one or more coils comprising said motor in a timed sequence of voltage application steps;
- and,
- starting said rotor from said known stopped position wherein a voltage is applied to one or more coils comprising said motor in a timed sequence of voltage application steps.
A method of aligning a fuel pump comprising a sensorless brushless polyphase DC motor in a motor vehicle, said method comprising:
- aligning a rotor comprising said sensorless brushless polyphase DC motor to a known stopped position with respect to at least one coil comprising said sensorless brushless polyphase DC motor during a shut-down of said motor wherein a voltage is applied to one or more coils comprising said motor in a timed sequence of voltage application steps provided to said one or more coils by a controller;
- starting said rotor from said known stopped position wherein a voltage is applied to one or more coils comprising said motor in a timed sequence of voltage application steps provided to said one or more coils by said controller.
Dependencies are inferred from the claim text.