Sensorless motor braking system

摘要

An electric motor control system includes a motor control circuit for generating a motor control signal and a braking mechanism for adjusting the motor control signal to augment motor losses when the motor control circuit is in a braking mode. The braking mechanism includes a difference component for receiving a first signal containing motor reference speed information, for receiving a second signal containing actual speed information, and for generating a third signal containing information indicating a difference between the reference speed and the actual speed. An integrating component integrates the third signal and generates a fourth signal representing the integrated third signal. The fourth signal may augment a voltage control signal in a voltage-based control circuit or may augment a flux-producing component of a current control signal in a current-based control circuit. The electric motor control circuit may include multiple braking mechanisms for use in different modes of operation.

主权项

1. A braking mechanism for use with an electric motor control system, the braking mechanism comprising:
a difference component for receiving a first signal corresponding to a change in a reference motor speed over time, for receiving a second signal corresponding to a change in an actual motor speed over time, and for generating a third signal containing information indicating a difference between the change in reference motor speed and the change in actual motor speed; and an integrating component for integrating the third signal and generating a fourth signal based on the integrated third signal.