Research on on-line monitoring method of efficiency of three-phase asynchronous motor

In view of the fact that temperature rise, load and no-load testing are needed for most of the traditional efficiency testing methods of three-phase asynchronous motors, and torque measuring devices are difficult to be installed in the actual operation site, an online efficiency monitoring method based on air gap torque method is proposed, which has guiding significance for on-site measurement and evaluation of the operational efficiency of three-phase asynchronous motors.