ZF3000 series inverter is high performance vector control, a lot of customers do not understand what is vector control, today I gave you some basic concepts about vector control and the original, I hope it can help bring you.

Vector control principle

       Vector is a closed-loop vector control with an encoder, where the speed feedback is obtained through the encoder. Vector control specifically refers to the decomposition of the stator current vector of an asynchronous motor into the current component that generates the magnetic field (excitation current) and the current component that generates the torque (torque current) and control the amplitude and phase between the two components simultaneously, i.e. control the stator current vector, so this control method is called vector control method.

       Simply put, vector control is to decouple the magnetic chain from the torque, which facilitates the design of separate regulators for both to achieve high performance speed regulation of AC motors. This allows a three-phase asynchronous motor to be controlled equivalently as a DC motor, thus obtaining the same static and dynamic performance as a DC speed control system.

       Features of vector control.

Speed can be reduced to 0 Hz in closed loop (stationary state) 

Constant torque can be maintained over the rated speed range

Compared to speed control without encoder, the dynamic characteristics of the drive are significantly improved due to the direct measurement of the speed and the integrated modeling of the current components.

Higher speed accuracy

Advantages of vector control

      Dynamic high-speed response, low-frequency torque increase, and flexible control.

      Specifically, the stator current I1 and phase ф are controlled simultaneously, and the torque response is very good and accurate. Excitation current Im=I1cosφ, torque current I2=I1sinφ, motor torque=KImI2. voltage vector: a method to control the voltage of motor magnetic field and torque. If the stator circuit of the motor is 100% known

Advantages of vector control

      Dynamic high-speed response, low-frequency torque increase, and flexible control.

      Specifically, the stator current I1 and phase ф are controlled simultaneously, and the torque response is very good and accurate. Excitation current Im=I1cosφ, torque current I2=I1sinφ, motor torque=KImI2. voltage vector: a method to control the voltage of motor magnetic field and torque. If the stator circuit of the motor is 100% known

Disadvantages of vector control

      By rotor magnetic chain orientation, the stator current excitation component and torque component are decoupled, and closed-loop current control is required. The rotor magnetic chain system is controlled by a stable inertia link and can be controlled by either closed-loop or open-loop control of the magnetic chain.

      By rotor magnetic chain orientation, the stator current excitation component and torque component are decoupled, and closed-loop current control is required. The rotor magnetic chain system is controlled by a stable inertia link and can be controlled by either closed-loop or open-loop control of the magnetic chain.