servo motor
As we all know, today is an era when the industrial level is becoming more and more intelligent.
CNC wants to realize intelligence and automation needs servo system.
1. Is the servo motor AC or DC?
Servo motors include AC motors and DC motors.
2. What is the difference between AC servo motor and DC servo motor?
DC servo motor, which includes stator, rotor core, motor shaft, servo motor winding commutator, servo motor winding, tachogenerator winding, tachogenerator commutator, said rotor core is laminated and fixed by silicon steel punching sheet It is formed on the motor shaft.
The structure of AC servo motor can be divided into two parts, namely the stator part and the rotor part. Among them, the structure of the stator is basically the same as that of the resolver, and two-phase windings with a space of 90 degrees of electrical angle are also placed in the stator core. One group is the excitation winding and the other is the control winding. The AC servo motor is a two-phase AC motor.
3. What are the advantages and disadvantages of AC servo motors and DC servo motors?
DC servo motors are divided into brushed and brushless servo motors. Brushed motors have low cost, simple structure, large starting torque, wide speed adjustment range, easy control, and maintenance, but easy maintenance (change carbon brushes), which will generate electromagnetic Interference, there are requirements for the environment. Therefore, it can be used in common industrial and civil occasions that are sensitive to cost.
The brushless 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 DC servo motor is easy to realize intelligence, and its electronic commutation method is flexible, which can be square wave or sine wave. The motor is maintenance-free and there is no carbon brush loss. It has high efficiency, low operating temperature, low noise, low electromagnetic radiation, long life, and can be used in various environments.
Actuator drives used in various digital control systems and power drives that require precise control of a constant speed or precise control of the speed change curve. Because DC servo motors have a series of advantages such as simple structure, reliable operation and convenient maintenance of AC motors, as well as high operating efficiency, no excitation loss and good speed regulation performance of DC motors, they are used in various fields of the current national economy. , Such as medical equipment, instrumentation, chemical industry, textile and household appliances, etc. applications are becoming more and more popular.
The AC servo motor has good speed control characteristics, smooth control can be achieved in the entire speed zone, almost no oscillation, high efficiency of more than 90%, low heat generation, high-speed control, high-precision position control (depending on the encoder accuracy), rated In the operating area, it can achieve constant torque, low inertia, low noise, no brush wear, and maintenance-free (suitable for dust-free and explosive environments). AC servo motors are also brushless motors, which are divided into synchronous and asynchronous motors. At present, synchronous motors are generally used in motion control. They have a large power range, a large power, large inertia, and a low maximum speed. The speed increases with power. Uniform decline, suitable for low-speed and stable operation occasions.
The disadvantage of AC servo motors is that the control is more complicated, the drive parameters need to be adjusted on-site to determine the PID parameters, and more connections are needed to support its operation. AC servo drive can be used in all occasions where the control accuracy of position, speed and torque is relatively high. Such as machine tools, printing equipment, packaging equipment, textile equipment, laser processing equipment, robots, electronics, pharmaceuticals, financial machinery, automated production lines, etc. Because servo is mostly used in positioning and speed control occasions, servo is also called motion control.
CNC wants to realize intelligence and automation needs servo system.
1. Is the servo motor AC or DC?
Servo motors include AC motors and DC motors.
2. What is the difference between AC servo motor and DC servo motor?
DC servo motor, which includes stator, rotor core, motor shaft, servo motor winding commutator, servo motor winding, tachogenerator winding, tachogenerator commutator, said rotor core is laminated and fixed by silicon steel punching sheet It is formed on the motor shaft.
The structure of AC servo motor can be divided into two parts, namely the stator part and the rotor part. Among them, the structure of the stator is basically the same as that of the resolver, and two-phase windings with a space of 90 degrees of electrical angle are also placed in the stator core. One group is the excitation winding and the other is the control winding. The AC servo motor is a two-phase AC motor.
3. What are the advantages and disadvantages of AC servo motors and DC servo motors?
DC servo motors are divided into brushed and brushless servo motors. Brushed motors have low cost, simple structure, large starting torque, wide speed adjustment range, easy control, and maintenance, but easy maintenance (change carbon brushes), which will generate electromagnetic Interference, there are requirements for the environment. Therefore, it can be used in common industrial and civil occasions that are sensitive to cost.
The brushless 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 DC servo motor is easy to realize intelligence, and its electronic commutation method is flexible, which can be square wave or sine wave. The motor is maintenance-free and there is no carbon brush loss. It has high efficiency, low operating temperature, low noise, low electromagnetic radiation, long life, and can be used in various environments.
Actuator drives used in various digital control systems and power drives that require precise control of a constant speed or precise control of the speed change curve. Because DC servo motors have a series of advantages such as simple structure, reliable operation and convenient maintenance of AC motors, as well as high operating efficiency, no excitation loss and good speed regulation performance of DC motors, they are used in various fields of the current national economy. , Such as medical equipment, instrumentation, chemical industry, textile and household appliances, etc. applications are becoming more and more popular.
The AC servo motor has good speed control characteristics, smooth control can be achieved in the entire speed zone, almost no oscillation, high efficiency of more than 90%, low heat generation, high-speed control, high-precision position control (depending on the encoder accuracy), rated In the operating area, it can achieve constant torque, low inertia, low noise, no brush wear, and maintenance-free (suitable for dust-free and explosive environments). AC servo motors are also brushless motors, which are divided into synchronous and asynchronous motors. At present, synchronous motors are generally used in motion control. They have a large power range, a large power, large inertia, and a low maximum speed. The speed increases with power. Uniform decline, suitable for low-speed and stable operation occasions.
The disadvantage of AC servo motors is that the control is more complicated, the drive parameters need to be adjusted on-site to determine the PID parameters, and more connections are needed to support its operation. AC servo drive can be used in all occasions where the control accuracy of position, speed and torque is relatively high. Such as machine tools, printing equipment, packaging equipment, textile equipment, laser processing equipment, robots, electronics, pharmaceuticals, financial machinery, automated production lines, etc. Because servo is mostly used in positioning and speed control occasions, servo is also called motion control.