Stepper motor stepper motor and servo motor has always been our goal of contrast, small make up today, just to inform us of the stepper motor and servo motor control precision what's different? 1 servo motor, servo motor force, torque, speed and other factors to: compared with the open-loop system, servo control system has less of the steady state error, transient response and sensitivity to the load parameters. Improve the transient echo can increase system bandwidth, shorten the setting time and throughput. Minimize the steady-state error improved accuracy. In the end, the lower tolerance voltage load sensitivity allows movement system, the torque and the fluctuation of load inertia. 2, stepper motor, stepper motor is a kind of induction motor, its working principle is the use of electronic circuit, direct current (dc) into time-sharing power supply, multiphase sequential control current, in this current for stepper motor power supply, step motor to work properly, is time-sharing power supply for step motor drive, multiphase timing controller. Control precision of the ac servo motor by the motor shaft after the rotary encoder. Panasonic digital ac servo motor, for example, for 2500 encoder of the motor with specification, because drive internal used four frequency multiplication technology, the pulse equivalent to 360 & deg; / 10000 = 0. 036°。 For with 17 encoder of the motor, drive each receive 217 = 131072 pulse motor turns a circle, namely its pulse impact equivalent to 360 & deg; / 131072 = 9. In 89 seconds. Step is from Angle of 1. 8°1/655 of the pulse equivalent of stepper motor. Two-phase hybrid stepper motor step Angle is commonly 3. 6°, 1. 8°, five step away from the Angle of the hybrid stepping motor is commonly 0. 72 °, 0. 36°。 There are some high function of stepper motor step Angle is smaller. Such as cross company makes a stepper motor for wire walking machine, the step from the Angle of 0. 09°; Berger lahr company (GermanBERGER LAHR)Produces three-phase hybrid stepping motor of the step Angle can dial the code switch is set to 1. 8°, 0. 9°, 0. 72°, 0. 36°, 0. 18°, 0. 09°, 0. 072°, 0. 036°And combine the two and five phase hybrid stepper motor step Angle. The above content is of different precision stepper motor and servo motor, in addition to the control accuracy is different, both the torque-speed characteristic in the different speed, overload ability, operation function, echo has different function and speed of the motor.
