MOTOR CONTROLLER WITH INTEGRATED METERING FUNCTION

摘要

A motor controller is provided with integrated metering and data logger functions to measure, store and report information suitable to verify the controller's energy saving performance. The integrated functions in the controller can be used to establish an AC motor's baseline electrical power and energy profile and to monitor continuously the power and energy reduction performance of the controller without requiring a separate meter and logger.

主权项

1. A method of determining performance of a controller for an alternating current (AC) motor, the method comprising:
installing a controller between an AC power source and the AC motor, the controller having a control algorithm to control operation of the AC motor; executing a first algorithm to obtain a first data set relating to the operation of the AC motor, the step of executing a first algorithm comprising:
closing a relay in the controller to provide AC power directly to the AC motor from the AC power source;measuring data relating to the AC motor in response to the relay being in a closed position; andstoring in the first data set the measured data relating to the AC motor in response to the relay being in a closed position; executing a second algorithm to obtain a second data set relating to the operation of the AC motor, the step of executing a second algorithm comprising:
opening the relay in the controller to prevent direct transfer of AC power from the AC power source to the AC motor;controlling activation of a power switch in the controller with the control algorithm to control the AC power provided to the AC motor;measuring data relating to the AC motor in response to controlling activation of the power switch in the controller with the control algorithm; andstoring in the second data set the measured data relating to the AC motor in response to controlling activation of the power switch in the controller with the control algorithm; comparing the second data set to the first data set to calculate a difference between the second data set and the first data set; and communicating the difference to a user, wherein the communicated difference is representative of a change in performance of the AC motor resulting from executing the control algorithm.