1: servo motor servo motors are widely used in various kinds of control system, can convert the input voltage signal to the motor shaft mechanical output, drag the control element, so as to achieve the control purpose. has dc and ac servo motor, the original servo motor was general of dc motor, the control accuracy is not high, only use the general dc motor servo motor. The dc servo motor is structurally small power dc motor excitation with armature control and magnetic control but usually adopt the armature control. 2:
of the stepping motor, stepper motor is mainly used in the field of nc machine tool manufacturing, due to the stepper motor don't need A/D conversion, can be directly to digital pulse signal into angular displacement, therefore has long been regarded as the most ideal CNC machine actuators. in addition to the application of numerical control machine tool, the stepper motor can also be used in other machinery, such as automatic feeder of the motor, as a general purpose floppy drive motor, can also be applied in the printer and plotter.
3: torque motor torque motor has the characteristics of low speed and large torque. Generally in the textile industry often use ac torque motor, its working principle and structure of single-phase asynchronous motor and the same. 4: switch reluctance motor switch reluctance motor, motor is a new type of speed control structure is extremely simple and strong, low cost, excellent speed regulating performance, strong competitors, is a traditional control motor has great market potential. 5:
brushless dc motor (BLDCM) brushless dc motor of the mechanical properties and the characteristics of the adjustment good linearity, wide speed range, long life, easy maintenance low noise, does not exist a series of problems caused by brush, so this kind of motor in the control system has a great application.
6: dc motor dc motor has good speed regulation performance and the advantages of starting easily, can load starting, so the dc motor is still widely used, especially in the coming of SCR dc power.
7: asynchronous motor asynchronous motor has simple structure, manufacture, use and maintenance is convenient, reliable operation and quality is small, low cost advantages. Asynchronous motor is widely used as the drive machine, water pump, fan, compressor, lifting lifting equipment, mining machinery, light industrial machinery, agricultural and sideline products processing machinery, etc. Most of the workers and peasants production machinery, household appliances and medical devices, etc. used in household appliances, such as electric fans, refrigerators, air conditioners, vacuum cleaners, etc.
8: synchronous motor synchronous motor is mainly used in heavy machinery, such as fan, water pump, compressor, rolling mill, ball mill and small, micro instruments and equipment, or act as control element. The three phase synchronous motor is the main body. In addition, still can be used when the condenser, the grid inductive or capacitive reactive power.
