PURPOSE: To reduce a current value gradually and to reduce noises by using stator coils of superconductive materials to which low resistor is connected in parallel.

CONSTITUTION: A superconductive brushless motor that stator coils 1 and 2 of superconductive materials are respectively connected to low resistors 3 and 4 in parallel, and that N channel MOS type switching transistors(Tr) 5 and 6 are respectively connected to each end of the stator coils 1 and 2. A position detection signal from a Hall element 7 opposed to moving magnet is transmitted to a monostable circuit 11 and a fixed contact 12a of a switch 12 through an amplifier circuit 10 thereof, and is transmitted to a monostable circuit 14 and a fixed contact 15a of a switch 12 through an inverter 13. In addition, said output signal is transmitted to a speed detection circuit 16, and traveling contact positions of said switched 12 and 15 are controlled. Accordingly, in case the mover reaches a specific speed, the switches 12 and 15 are changed over, the monostable circuits 11 and 14 output driving signals provided with narrow conduction angles.