Which is good, servo motor or stepping motor?
Let's take a look at the advantages of servo motors in comparison with other motors such as stepper motors:1 、 accuracy: closed loop control of position, speed and torque is realized, and the step of stepping motor is overcome;2, speed: high speed performance, generally rated speed can reach 2000~3000 rpm;3 、 adaptability: strong overload resistance, can withstand three times the rated torque load, especially for occasions with momentary load fluctuations and rapid start;
Stepper motor is an induction motor, its working principle is the use of electronic circuit, the DC power supply variable components, multi-phase timing control current this current stepper motor power supply, stepper motor can work normally, the power supply for the stepper motor driver is divided into the multi phase sequence controller.Although the stepper motor has been widely used, but stepper motors can not be like ordinary DC motors, AC motors in the regular use. It must be composed of double ring pulse signal, power drive circuit and so on, and the control system can be used. Therefore, it is not easy to make good use of stepping motor. It involves many specialized knowledge, such as mechanical, electrical, electronic and computer. Stepping motor, as an actuator, is one of the key products of mechatronics. It is widely used in various automatic control systems. With the development of micro electronics and computer technology, the requirement of stepping motor is increasing day by day, and it is applied in every national economic field.
The stepping motor is an open loop control element which transforms the electric pulse signal into angular displacement or linear displacement. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. Number of pulses can be controlled by controlling the angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the motor rotation speed and acceleration, so as to achieve the purpose of speed.
Servo motor (servo motor) refers to the servo system to control the operation of mechanical components of the engine, is a kind of auxiliary motor indirect transmission device.The servo motor can make the control speed and position accuracy very accurate, and the voltage signal can be converted into torque and speed to drive the control object. The servo motor rotor speed control by the input signal, and can respond quickly, in the automatic control system, used as actuators, and electromechanical time constant, high linearity, initiating voltage characteristics, to convert signals received from the motor shaft angular displacement or angular velocity output. Divided into DC and AC servo motor two major categories, the main feature is that when the signal voltage is zero, no rotation phenomenon, the speed increases with the torque and uniform decline.
