Hybrid linear reluctance motor type control rod drive mechanism

Belonging to the technical field of control rod drive mechanisms, the invention particularly relates to a hybrid linear reluctance motor type control rod drive mechanism. A pressure shell of the mechanism is composed of a magnetic conductive material and non-magnetic conductive material that are in alternating arrangement. A rotor assembly comprises a drive bar and a rotor, the rotor is a thick-wall steel pipe, and circular grooves are lathed on the pipe in the circumferential direction. One end of the drive bar is connected to the rotor, and the other end is in connection with a control rod assembly. A stator assembly comprises permanent magnets, magnetic yokes and coils, wherein the magnetic yokes have a ring structure, the inner sides of the magnetic yokes are provided with circular grooves with a rectangular cross section, the coils are disposed in the circular grooves, several magnetic yokes and permanent magnets are in alternating arrangement, and the permanent magnets at two ends of a magnetic yoke are opposite in polarity. A magnetostrictive rod position detector is installed at the bottom of the pressure shell. The rotor assembly is arranged in the pressure shell, and the stator assembly is sleeved and fixed on the outside of the pressure shell, the inner cavity of which is communicated with a reactor pressure vessel. The mechanism provided in the invention converts an electric pulse signal into linear motion directly with no need of any intermediate conversion device.