The motor is manufactured in a motor mech factory, and the asynchronous motor in operation will produce mechanical loss, iron core loss, and heat loss of the winding. The core loss is basically a fixed value, and it will not have much relationship with the load change. The other two are different: the mechanical loss is equal to W (input work) × (1-η). When the load changes, the input work is changing, so the energy loss is also changing. In addition, when the load of the motor changes, the working current of the motor also changes. The winding loss of the motor is equal to the product of the current and the DC resistance of the winding. The product of the current changes also changes, that is, the copper loss of the motor changes with the change of the load. The main method of reducing the mechanical loss of the motor is to reduce the mechanical loss of the motor mainly from the following aspects: (1) The use of high-efficiency fans (such as airfoil axial fans). (2) Adjust the gap between the fan hood and the outer circle of the fan blade. (3) Light-load motors appropriately reduce the outer diameter of the fan. (4) Use high-quality bearings. (5) Use high-quality lubricants. (6) Improve the quality of motor assembly
