Control system of the electric drive with field regulated reluctance machine

This article gives a mathematical description of the electric drive system, gives a notice that field regulated reluctance machine can be assumed as a muiti-channei system in which each channel structure is similar to the structure of the direct current electric drive. It is shown that electromagnetic torque control loop in the field regulated reluctance motor drives at low rotation speeds can be approximated by a pure delay element. The electric drive setup in the area of low speeds is made by a variable structure controller. Its parameters are switched with the function of the error signal signs and its derivative. This approach allowed us to expand the frequency bandwidth of the speed loop.