The performance of stepping motor and AC servo motor is very different. ? Stepper motor is a discrete motion device, which is essentially related to modern digital control technology. In the current domestic digital control system, stepping motor is widely used. With the appearance of all-digital AC servo system, AC servo motor is more and more used in digital control system. In order to adapt to the development trend of digital control, most motion control systems use stepping motors or all-digital AC servo motors as executive motors. Although they are similar in control mode (pulse sequence and direction signal), they are quite different in performance and application. For example: 1, the control accuracy is different; 2. Different low frequency characteristics 3. Different moment-frequency characteristics. Different overload capacities 5. Different running performance 6. Different speed response performance.
Introduction: Because the dynamic mathematical model of asynchronous motor is a high-order, nonlinear and strongly coupled multivariable system. It was put forward by Hasse of darmstadt University in the late 1960s. In the early 1970s, the doctoral thesis published by Siemens engineer F. blaschke in Tubraunchweig put forward the magnetic field oriented control method of three-phase motor, and solved the torque control problem of AC motor through the vector control theory of asynchronous motor. The basic principle of vector control is to measure and control the stator current vector of asynchronous motor, and control the excitation current and torque current of asynchronous motor according to the principle of magnetic field orientation, so as to control the torque of asynchronous motor.
Motor:
Motor (English: Electric machinery, commonly known as "motor") refers to an electromagnetic device that realizes electric energy conversion or transmission according to the law of electromagnetic induction.
The motor is represented by the letter M (old mark D) in the circuit, and its main function is to generate driving torque. As the power source of electrical appliances or various machines, the generator is represented by the letter G in the circuit, and its main function is to convert electrical energy into mechanical energy.