DC servo motor in a variety of applications in which categories

Since the DC servo motor has a series of advantages such as AC motor's simple structure, reliable operation and easy maintenance, and DC motor's high efficiency, no excitation loss and good speed performance, it is increasingly popular in various fields of the national economy, such as medical equipment, instrumentation, chemical industry, textile and household appliances and other aspects of the application. DC servo motor applications are mainly divided into the following categories:

Fixed-speed drive machinery

Generally do not need to adjust the speed of the field in the past, most of the three-phase or single-phase AC asynchronous and synchronous motors. With the progress of power electronics technology, in the power is not greater than KW10 and continuous operation, in order to reduce the size, save materials, improve efficiency and reduce energy consumption, more and more motors are being gradually replaced by DC servo motors, this kind of application:There are automatic doors, elevators, pumps, fans and so on. In the case of larger power occasions, due to a larger cost and investment, in addition to permanent magnet motors have to increase the drive, so there are fewer applications at present.

Speed drive machinery

Speed needs to be arbitrarily set and adjusted, but the control accuracy requirements are not high speed control system is divided into two kinds: one is an open-loop speed control system, the other is a closed-loop speed control system (at this time, the speed of the speed feedback device more low-resolution pulse encoder or AC or DC speed measurement, etc.). There are three main types of motors usually used: DC motors, AC asynchronous motors and DC servo motors. This has a large number of applications in packaging machinery, food machinery, printing machinery, material handling machinery, textile machinery and transportation vehicles. Speed applications initially used the most DC motor, with the development of AC speed technology, especially power electronics technology and control technology, AC frequency conversion technology has been widely used, frequency converter and AC motors quickly penetrate into the original DC speed control system of the vast majority of application areas. In recent years, due to a series of advantages of DC servo motor such as small size, low weight and high efficiency and energy saving, small and medium power AC frequency conversion system is gradually replaced by DC servo motor system, especially in the field of textile machinery, printing machinery and other original application of the frequency conversion system is more, and in some direct battery-powered DC motor applications, it is more by the DC servo motor replaced.

Precision control

Servo motors in the field of industrial automation in the high-precision control plays a very important role in the application of different occasions, the control of the servo motor performance requirements are not the same, in practice, servo motors have a variety of different control forms: torque control, current control, speed control, position control. DC servo motor due to its good control performance, in the high-speed, high-precision positioning system gradually replaced the DC motor and stepper motor, as one of its preferred servo motor. At present, scanners, cameras, CD player drive, medical diagnostic CT, computer hard disk drive and CNC lathe drive, etc. are widely used DC servo motor servo system for precision control.