Tag: ac servo motor

Servo motor can control speed, position accuracy is very accurate. It can convert voltage signals into torque and speed to drive control objects. Servo motor rotor speed is controlled by the input signal, and can respond quickly, in the automatic control system, used as an executive element, and has the characteristics of mechanical and electrical time constant is small, high linearity, can receive the electrical signal into the motor shaft angular displacement or angular velocity output.

In industrial applications such as automation technology, servo motor is the most commonly used high-tech equipment. Servo motor can control speed and position accuracy, also can convert voltage signals into torque and speed to drive control objects. Servo motor is divided into AC servo and DC servo two categories.

Servo motors are mainly classified into DC servo motors and AC servo motors. DC servo motors are divided into brush and brushless motors. Brushed motors have low cost, simple structure, large starting torque, wide speed range, easy to control and maintain (changing carbon brushes), it will generate electromagnetic interference and have specific requirements for the environment. Therefore, it is suitable for common industrial and civil occasions that are sensitive to cost.

The brushless servo motor is small in size, light in weight, large in output, fast in response, high in speed, small inertia, smooth in rotation, and stable in torque. The control is complex and easy to realize intelligence, and its electronic commutation method is flexible, and it can be square wave commutation or sine wave commutation. The motor is maintenance-free, highly efficient, low operating temperature, low electromagnetic radiation, long life, and can be used in various environments.

A servo motor is an actuator that allows for precise control of angular position in automatic control system. It also requires a servo drive to complete the system. The drive uses the feedback sensor to precisely control the rotary position of the motor. Compared with other motors, such as stepper motors and AC induction motors, what are the advantages of servo motors?

• The servo motor realizes the closed loop control of position, speed and torque, and overcomes the problem of stepper motor losing step.
• The servo motor has high speed performance, and the normal rated speed can reach 2000 ~ 3000 rpm.
• The servo motor has strong resistance to overload, and can withstand three times the load of rated torque. It is especially suitable for the occasion of instantaneous load fluctuation and fast starting.
• The servo motor runs smoothly at low speed, and it does not produce the step running phenomenon similar to stepper motor. It is suitable for situations with high speed response requirements.
• The dynamic time of motor acceleration and deceleration is short, usually within tens of milliseconds.
• The heat and noise of the motor are obviously reduced.