Now a lot of people are wondering which motors need magnets (steel, tile).
Dc motors mostly use magnets, below I share with you what kind of motor, need to understand the next look.

1.
According to the type of working power: can be divided into dc motor and ac motor.

1.1 dc motor can be divided into brushless dc motor and brushless dc motor according to structure and working principle.

1.1.1 brush-dc motor can be divided into permanent magnet dc motor and electromagnetic dc motor.

1.1.1.1 electromagnetic dc motor division: series excited dc motor, shunt excited dc motor, separately excited dc motor and compound excited dc motor.

1.1.1.2 permanent magnet dc motors: rare earth permanent magnet dc motors, ferrite permanent magnet dc motors and aluminum-nickel-cobalt permanent magnet dc motors.

1.1 ac motor can be divided into single-phase motor and three-phase motor.

2, according to the structure and principle of work: can be divided into dc motor, asynchronous motor, synchronous motor.

2.1 synchronous motor can be divided into permanent magnet synchronous motor, reluctance synchronous motor and hysteresis synchronous motor.

2.2 induction motor can be divided into induction motor and ac commutator motor.

2.2.1 induction motors can be divided into three phase asynchronous motors, single phase asynchronous motors and covered pole asynchronous motors.

2.2.2 ac commutator motors can be divided into single-phase series motor, ac-dc motor and repulsion motor.

3.
According to the starting and running mode: capacitor-starting single-phase asynchronous motor, capacitor-running single-phase asynchronous motor, capacitor-starting single-phase asynchronous motor and split-phase single-phase asynchronous motor.

4.
By use: drive motor and control motor.

Drive motor division 4.1: electric tools, including drilling, polishing, grinding, slotting, cutting, reaming tools such as motor, household appliances, including washing machines, electric fans, refrigerators, air conditioner, tape recorder, video recorder, VCD, vacuum cleaners, cameras, hair dryer, electric shaver, etc.), motor and other general small mechanical equipment (including all kinds of small machine tools, small machinery, medical equipment, electronic instruments, etc.) motor.

4.2 control motor is divided into stepper motor and servo motor.

5.
According to the structure of the rotor: cage induction motor (old standard called squirrel-cage asynchronous motor) and wound rotor induction motor (old standard called winding asynchronous motor).

6.
Divided by running speed: high speed motor, low speed motor, constant speed motor, speed motor.

The above information is helpful for you to know which motors need magnets.