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 motorsGuided startup in 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).