Gray cast iron is usually used.
Most or all of the carbon in gray cast iron exists in the form of flake graphite, and the fracture surface is gray. According to the different forms of graphite, gray cast iron can be divided into gray cast iron, malleable cast iron and nodular cast iron.
These three materials are all used to make motor housings. Low cost and difficult deformation.
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Classification of motor products
1. According to the classification of working power supply and the different working power supply of motor, it can be divided into DC motor and AC motor. Among them, AC motors are divided into single-phase motors and three-phase motors.
2. Classification of motors according to structure and working principle Motors can be divided into DC motors, asynchronous motors and synchronous motors according to structure and working principle. Synchronous motors can also be divided into permanent magnet synchronous motors, reluctance synchronous motors and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors are divided into three-phase asynchronous motors and so on.
Phase asynchronous motor and shielded pole asynchronous motor, etc. AC commutator motor is divided into single-phase series motor, AC -DC dual-purpose motor and repulsion motor.
3. Classification of motors according to starting and running modes Motors can be divided into capacitor-started single-phase asynchronous motors, capacitor-operated single-phase asynchronous motors, capacitor-started single-phase asynchronous motors and split-phase single-phase asynchronous motors according to starting and running modes.
4. Motors can be classified into drive motors and control motors according to their uses.
The driving motor is divided into electric tools (including drilling, grinding, polishing, slotting, cutting, reaming, etc.). ) and household appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders, DVD players, vacuum cleaners, cameras, hair dryers, electric razors, etc. )
Motor and other general small mechanical equipment (including all kinds of small machine tools, small machinery, medical instruments, electronic instruments, etc.). ). Control motors are divided into stepper motors and servo motors.
5. According to the structure of the rotor, the motor can be divided into squirrel-cage induction motor (called squirrel-cage asynchronous motor in the old standard) and wound induction motor (called wound asynchronous motor in the old standard).
6. Classify motors according to running speed. According to running speed, motors can be divided into high-speed motors, low-speed motors, constant-speed motors and variable-speed motors.
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