The motor end cover is the rear cover installed behind the motor housing. It can be manufactured by CNC engraving, Sand Casting, transparent acrylic(PMMA/PC) 3D Printing.

1. Ac asynchronous motor
Ac asynchronous motor is the leading AC voltage operation motor, widely used in electric fans, refrigerators, washing machines, air conditioners, hair dryers, vacuum cleaners, range hoods, dishwashers, electric sewing machines, food processors and other household appliances and a variety of electric tools, small electromechanical equipment.
Ac induction motor is divided into induction motor and AC commutator motor. Induction motors are divided into single-phase asynchronous motors, AC-DC dual purpose motors and repulsion motors.
The speed of the motor (rotor speed) is less than the speed of the rotating magnetic field, so it is called an asynchronous motor. It's basically the same as an induction motor. s=(ns-n)/ns. s is slip rate,
ns is the speed of the magnetic field and n is the speed of the rotor.
The basic principle:
1, when the three-phase asynchronous motor is connected to the three-phase AC power supply, the three-phase stator winding flows through the three-phase symmetric current generated by the three-phase magnetomotive force (stator rotational magnetomotive force) and generates a rotating magnetic field.
2. The rotating magnetic field has relative cutting motion with the rotor conductor. According to the principle of electromagnetic induction, the rotor conductor generates induced electromotive force and induced current.
3, according to the law of electromagnetic force, the rotor conductor carrying current is subjected to electromagnetic force in the magnetic field, forming electromagnetic torque, driving the rotor to rotate, when the motor shaft with mechanical load, it will output mechanical energy.
Asynchronous motor is an AC motor, the ratio of the speed of the load to the frequency of the connected grid is not constant. It also varies with the size of the load. The greater the load torque, the lower the rotor speed. Induction motor includes induction motor, doubly-fed induction motor and AC commutator motor. Induction motor is the most widely used, in the case of not causing misunderstanding or confusion, induction motor can generally be called asynchronous motor.
The stator winding of the general induction motor is connected to the AC power grid, and the rotor winding does not need to be connected to other power sources. Therefore, it has the advantages of simple structure, convenient manufacture, use and maintenance, reliable operation, smaller quality and lower cost. Asynchronous motor has higher operating efficiency and better working characteristics, from no-load to full load range close to constant speed operation, can meet the transmission requirements of most industrial and agricultural production machinery. Asynchronous motors can also be easily derived into various types of protection to meet the needs of different environmental conditions. When the asynchronous motor is running, the reactive excitation power must be absorbed from the power grid, which makes the power factor of the power grid worse. Therefore, synchronous motors are often used to drive high-power, low-speed mechanical equipment such as ball mills and compressors. Because the speed of the asynchronous motor has a certain slip relationship with the rotating magnetic field speed, its speed regulation performance is poor (except AC commutator motor). It is more economical and convenient to use DC motor for transportation machinery, rolling mill, large machine tool, printing and dyeing machinery and papermaking machinery which require wider and smooth speed range. However, with the development of high-power electronic devices and AC speed regulation system, the speed regulation performance and economy of asynchronous motors suitable for wide speed regulation have been comparable to that of DC motors.