In the last century, the worker spent a lot of time and energy to manually, a lot of things, such as the bottle filling line, temperature control system, etc. Even in the early period of industrial, because of the instability of the motor controller, a lot of work to be done or artificial. Since the emergence of the servo system to change the status quo. The emergence of servo motor controller, obviously improve the product, and reduce the production cost. Motor servo motor is also called the implementation, in the automatic control system, is used as actuators, converts the received electrical signal into angular displacement or velocity of motor shaft output. Controller dc motor servo control performance is good, is refers to the motor under certain load conditions, according to the need, change the speed of the motor. Servo drive system adopts the positioning of the drive controller software, able to accurately determine the position and speed information. Dc motor can be realized in the load conditions, even, smooth, stepless speed regulation, and a wide range of speed. A great power. Can be evenly and to achieve economic speed setting. As a result, people who are under the heavy load starting or require uniform adjusting the rotational speed of machinery, such as large reversible rolling mill, hoist, electric locomotive, trams, etc. , all use dc motor drive.
