Vector control: The stator current of the AC motor is decomposed into the excitation current and torque current, and controlled separately, which can realize independent control of the magnetic flux and torque of the motor, so that the motor has similar speed regulation performance to the DC motor, and is often used in applications with high speed regulation performance requirements.
Direct torque control: directly analyze the mathematical model of the motor in the stator coordinate system, control the flux linkage and torque of the motor, with fast torque response and good dynamic performance.
performance index
Input index: including input voltage range, input current, power factor, etc. The input voltage range determines the power grid voltage fluctuation range that the inverter can adapt to; the power factor reflects the utilization efficiency of the inverter to the power grid.
Output indicators: including output voltage range, output frequency range, overload capacity, etc. Output voltage and frequency range determine the voltage and speed range that the inverter can drive the motor; overload capacity indicates the ability of the inverter to withstand more than the rated current in a short period of time.
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