Auto phase adjustment system and method for motor control
AssigneeMarvell International Ltd.
InventorYichao Wang
Life of this patent
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Abstract
A method includes measuring a speed of a motor, determining a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusting a profile of the motor voltage by the determined phase angle, and generating a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile. An apparatus includes a motor, and a driver circuit. The driver circuit measures a speed of the motor, determines a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusts a profile of the motor voltage by the determined phase angle, and generates a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile.
Claims18
A method comprising:
- measuring a speed of a motor;
- determining a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor;
- adjusting a profile of the motor voltage by the determined phase angle;
- and
- generating a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile,
- wherein a profile of the motor current is substantially aligned with the back-EMF profile of the motor.
An apparatus comprising:
- a motor;
- and
- a driver circuit to measure a speed of the motor, determine a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjust a profile of the motor voltage by the determined phase angle, and generate a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile,
- wherein a profile of the motor current is substantially aligned with the back-EMF profile of the motor.
Dependencies are inferred from the claim text.