Method for operating sensorless and brushless motors
First Claim
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1. 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, said aligning during stopping of said motor wherein a voltage is applied to one or more coils comprising said motor in a first timed sequence of voltage application steps, said aligning comprising moving said rotor to said known stopped position during said stopping of said motor, said stopping comprising deceleration of said motor from a constant operating speed; and
,starting said rotor from said known stopped position without aligning said rotor with respect to said at least one coil to determine a position of said rotor, said starting including wherein a voltage is applied to one or more coils comprising said motor in a second timed sequence of voltage application steps.
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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.
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Citations
18 Claims
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1. A method of aligning a sensorless brushless polyphase DC motor comprising:
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aligning a rotor comprising said motor to a known stopped position with respect to at least one coil comprising said motor, said aligning during stopping of said motor wherein a voltage is applied to one or more coils comprising said motor in a first timed sequence of voltage application steps, said aligning comprising moving said rotor to said known stopped position during said stopping of said motor, said stopping comprising deceleration of said motor from a constant operating speed; and
,starting said rotor from said known stopped position without aligning said rotor with respect to said at least one coil to determine a position of said rotor, said starting including wherein a voltage is applied to one or more coils comprising said motor in a second timed sequence of voltage application steps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of aligning a fuel pump comprising a sensorless brushless polyphase DC motor in a motor vehicle, said method comprising:
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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, said aligning during stopping of said motor wherein a voltage is applied to one or more coils comprising said motor in a first timed sequence of voltage application steps provided to said one or more coils by a controller, said aligning comprising moving said rotor to said known stopped position during said stopping of said motor, said stopping comprising deceleration of said motor from a constant operating speed; starting said rotor from said known stopped position without aligning said rotor with respect to said at least one coil to determine a position of said rotor, said starting including wherein a voltage is applied to one or more coils comprising said motor in a second timed sequence of voltage application steps provided to said one or more coils by said controller. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification