DC motor: DC input money counter is generally divided into brush and brushless.
Asynchronous motor: As the name implies, the change of stator magnetic field is not synchronous with the change of rotor magnetic field, and its rotor is generally excited (the stator magnetic field must be excited before the force can be generated).
Three-phase asynchronous motor: the input of three-phase electricity is the same as that of asynchronous motor.
Steering gear: This is for the ship. Not really.
Servo motor: a motor that can move accurately according to instructions. What is different from the traditional motor is its rotor permanent magnet. Now it is generally made of rare earth. Some time ago, because China restricted the export of rare earths, a large number of Japanese servo motors were out of stock. In addition, its precise control is inseparable from the servo driver. The principle of this driver is similar to that of high-grade inverter, but it is more powerful than inverter in precise control and torque control.
Specifically, I am an amateur. This thing is too detailed. On the one hand, my theory is not so broad. On the other hand, I also know the commercial model and performance of LS servo. And some European products. I don't know much about commercial products of ordinary motors. Sun, Electrical Department of Suzhou Precision Industry Co., Ltd.