VFC^PLUS

VFC^PLUS is a high-performance control mode that is able to operate asynchronous motors with very high torque dynamics with or without rotary encoder and synchronous reluctance motorsIn preparation.

The control mode can be operated as speed or torque control.

This control mode calculates all important state variables for controlling the motor by using a motor model. As a result, optimal magnetic conditions are always achieved for the motor.

For applications with a large speed setting range (especially for low speeds through to idle state) and high requirements regarding the control characteristics or for drives with high dynamic step changes in load, a rotary encoder is absolutely necessary.

For applications with low requirements regarding the speed control characteristics and the torque dynamics, an encoder is not necessary. Without a rotary encoder, the electric rotor frequency is calculated in a model. In this case, stable stationary operation of the mode at < 0.5 Hz is not possible.

Due to the good torque dynamics, the VFC^PLUS control mode remains stable even in the event of sudden load changes and has a high torque accuracy. Typical applications for the VFC^PLUS control mode are speed-controlled asynchronous machines with high demands on the speed and torque stability.

Switching to a rotating motor is possible (flying start function).

• Speed control
• Torque control
• Position control