Principle Of Vector Inverter

Vector control technology transforms the three-phase system into an M-T two-phase system through coordinate transformation, and decomposes the stator current vector of the AC motor into two DC components (i.e., flux component and torque component), so as to achieve the purpose of controlling the flux and torque of the AC motor respectively, and thus can obtain the same good control effect as the DC speed regulation system.
The vector control system adopts a double closed-loop control system.
In this system, the motor speed obtained by the measurement is used to generate the magnetic field oriented stator current component given value and the slip angle frequency given value through the vector operator. The rotor flux position angle θ is obtained through integration operation and sent to the rotation transformation link. The torque current component iM and the excitation current component iT are obtained from the measured current through vector transformation, and the torque current component iM and the excitation current component iT are obtained by using