Measures to improve the efficiency of electric motors. The energy saving of the motor is a systematic engineering, involving the whole life cycle of the motor, from the design and manufacture of the motor to the selection, operation, regulation, maintenance and scrapping of the motor, the effect of its energy-saving measures should be considered from the whole life cycle of the motor, and the main consideration at home and abroad in this regard is to improve the efficiency of the motor from the following aspects.
The design of energy-saving motor refers to the use of modern design methods such as optimization design technology, new material technology, control technology, integration technology, test and detection technology to reduce the power loss of the motor, improve the efficiency of the motor, and design an efficient motor.
While converting electrical energy into mechanical energy, the motor itself also loses a part of the energy, and the typical AC motor loss can generally be divided into three parts: fixed loss, variable loss and stray loss. Variable losses vary with load and include stator resistance losses (copper), rotor resistance, and brush resistance, while fixed losses are load-independent and include core and mechanical losses. The iron loss is composed of hysteresis loss and eddy current loss, which is proportional to the square of the voltage, and the hysteresis loss is inversely proportional to the frequency, and the other stray loss is mechanical loss and other losses, including the friction loss of the bearing and the wind resistance loss caused by the rotation of the fan and rotor.