Stepping motors and servo motors have always been our target of comparison. Today, the editor of the day told us how the control accuracy of stepper motors and servo integrated stove motor suppliers motors differ. 1. The force, torque, speed and Talent of other factors: Compared with the open-loop system, the servo control system has fewer steady-state errors, transient response and sensitivity to load parameters. Improving transient response can increase system bandwidth, shorten setup time, and improve throughput. Minimizing steady-state errors improves accuracy. Ultimately, reducing load sensitivity allows motion systems to tolerate fluctuations in voltage, torque, and load inertia. 2. Stepper motor Stepper motor is an induction motor. Its working principle is to use electronic circuits to convert DC power to time-sharing power supply. Multi-phase sequential control current. Use this current to power the stepper motor. In order for the motor to work properly, the driver is a time-phase power supply for the stepper motor, a multi-phase timing controller.
The control accuracy of the AC servo motor is guaranteed by the rotary encoder at the rear end of the motor shaft. Taking Panasonic’s all-digital AC servo motor as an example, for a motor with a standard 2500-line encoder, the pulse equivalent is 360 \u0026 deg; /10000=0.036\u0026deg; because the drive uses the quadruple frequency technology. For a motor with a 17-bit encoder, each time the driver receives 217 = 131072 pulses, the motor makes one revolution, that is, its pulse equivalent is 360 \u0026 deg; /131072=9.89 seconds. It is 1/655 of the pulse equivalent of a stepping motor with a step angle of 1.8 \u0026 deg ;. The step angle of two-phase hybrid stepping motor is generally 3.6 \u0026 deg ;, 1.8 \u0026 deg ;, and the step angle of five-phase hybrid stepping motor is generally 0.72 \u0026 deg ;, 0.36 \u0026 deg ;.
There are also some high-performance stepper motors with smaller step angles. For example, a stepping motor for a slow-walking machine tool produced by Stone Co., Ltd. has a step angle of 0.09 \u0026 deg; and a three-phase hybrid stepper motor produced by BERGER LAHR in Germany. Dip switches are set to 1.8 \u0026 deg ;, 0.9 \u0026 deg ;, 0.72 \u0026 deg ;, 0.36 \u0026 deg ;, 0.18 \u0026 deg ;, 0.09 \u0026 deg ;, 0.072 \u0026 deg ;, 0.036 \u0026 deg ;, compatible with two-phase and five-phase hybrid stepping motors Step angle. The above is the difference between stepper motor and servo motor accuracy. In addition to the difference in control accuracy, the two have different torque frequency characteristics, overload capabilities, running functions, speed response functions, and motor speed.
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