Motor controller with drive-signal conditioning

摘要

An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is configured to generate a motor-coil drive signal having a first component at a first frequency, and the signal conditioner is coupled to the motor driver and is configured to alter the first component. For example, if the first component of the motor-coil drive signal causes the motor to audibly vibrate (e.g., “whine”), then the signal conditioner may alter the amplitude or phase of the first component to reduce the vibration noise to below a threshold level.

主权项

1. A motor controller, comprising:
a motor driver configured to generate a motor-coil drive signal having a first component at a first frequency; and a signal conditioner coupled to the motor driver and configured to alter the first component;wherein:the signal conditioner is configured to generate a conditioning signal; andthe motor driver comprises:
signal generator configured to generate an initial drive signal;a multiplier configured to generate an intermediate drive signal by multiplying the initial drive signal with the conditioning signal; anda converter configured to convert the intermediate drive signal into the motor-coil drive signal.