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Steady state model control method
Commonly used steady-state model control schemes include open-loop constant v/f ratio control (ie voltage/frequency = constant) and closed-loop slip frequency control.
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Control Strategy
With the development of power electronics technology, microelectronics technology, digital control technology and control theory, the dynamic and static characteristics of the AC drive system are completely comparable to the DC drive system.
Synchronous motor
The structure of a synchronous motor is roughly the same as that of an alternator. The basic difference between it and an induction motor is that its rotor is a protruding magnetic pole with a coil, and another exciter is used to pick up the direct current and the alternating current)
Principle of induction motor
The induction motor is also called "asynchronous motor", that is, the rotor is placed in a rotating magnetic field, and under the action of the rotating magnetic field, a rotating torque is obtained, so the rotor rotates.
AC motors are composed of a stator and a rotor
AC motors are composed of a stator and a rotor. AC motors are divided into two types: synchronous AC motors and induction motors. In both motors, the stator-side winding is supplied with alternating current to generate a rotating magnetic field, but the rotor winding of a synchronous AC motor usually requires an excitation machine to supply direct current (excitation current); while the induction motor does not need to be supplied with current to the rotor winding.
