MOTOR SPEED CONTROLLER
First Claim
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1. A method of controlling a motor, the method comprising:
- cutting a voltage to the motor;
measuring an electromotive force (EMF) of the motor at a predetermined time after the cutting of the voltage to the motor; and
comparing the measured electromotive force (EMF) to a table.
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Abstract
A motor speed controller and a method of controller a speed of a motor are provided. The system and method include a motor and a motor controller that monitors operation of the motor based on electromotive force (EMF) conditions of the motor. The motor controller cuts a voltage to the motor, measures an electromotive force (EMF) of the motor at a predetermined time after the cutting of the voltage to the motor, and compares the measured electromotive force (EMF) to a table.
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Citations
25 Claims
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1. A method of controlling a motor, the method comprising:
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cutting a voltage to the motor; measuring an electromotive force (EMF) of the motor at a predetermined time after the cutting of the voltage to the motor; and comparing the measured electromotive force (EMF) to a table. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of controlling a motor, the method comprising:
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periodically cutting a voltage to the motor; measuring an electromotive force (EMF) of the motor at a predetermined period of time after the cutting of the voltage to the motor; and comparing the measured electromotive force (EMF) to a table to determine if the motor is operating properly, wherein, if the motor is determined to be operating properly, the method includes outputting a first signal and turning the voltage to the motor back on, and wherein, if the motor is determined to be operating improperly, the method includes outputting a second signal.
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18. A sensorless motor speed controller system comprising:
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a motor; and a motor controller that monitors operation of the motor based on electromotive force (EMF) conditions of the motor. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A sensorless motor speed controller that monitors operation of a motor based on electromotive force (EMF) conditions of the motor, the sensorless motor speed controller comprising:
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a microcontroller that cuts a voltage to the motor; and a speed sensing module that measures the electromotive force (EMF) of the motor at a time when the voltage is cut, wherein the microcontroller receives the measured electromotive force (EMF) from the speed sensing module and compares the measured electromotive force (EMF) to a table. - View Dependent Claims (25)
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Specification