Reluctance type motor

Claim 2

A three-phase reluctance-type motor comprising: an outer casing provided with side boards on both sides thereof, bearings provided in the center of said side boards, a rotating shaft supported by said bearings for free rotation, a magnetic rotor fixed to said rotating shaft within said outer casing, eight salient poles disposed on the outer peripheral surface of said rotor with an equal width and equal pitch,    first and second stationary armature juxtaposcd within said outer cas, ing with the outer periphery thereof being fixed, six first magnetic poles which are projected from the inner peripheral surface of said first stationary armature, opposed to said salient poles through a slight air gap, and excited by three-phase, half-wave energization, said magnetic poles existing at axially symmetrical positions being in phase, first exciting coils wound around said first magnetic poles, six second magnetic poles which are projected from the inner peripheral surface of said second stationary armature, opposed to said salient poles through a slight air gap, and excited by three-phase, half-wave energization, said magnetic poles existing at axially symmetrical positions being in phase, second exciting coils wound around said second magnetic poles, a position detecting device including position detecting elements which detect the positions of said salient poles to provide first position detecting signals of continuous rectangular waves of first, second and third phases having a width of 120 degrees in electrical angle, and second position detecting signals of continuous rectangular waves of the first, sec ond and third phases having a width of 120 degrees in electrical angle, said second position detecting signals being delayed by 60 degrees in electrical angle from said first position detecting signals, switching elements connected to both ends of said first and second exciting coils, diodes reversely connected to the respective series connecting bodies of the exciting coils corresponding to said switching elements, an energization control circuit for allowing said switching elements connected to said first and second exciting coils to conduct for the widths of said first and second position detecting signals, respectively, thereby to energize each exciting coil to generate a three-phase, full-wave output torque, means for adjusting the positions of said position detecting elements and fixing them to the stationary armature side so that the output torque due to the energization of said exciting coils of each phase becomes a maximum value, means for adjusting and fixing the relative positions of said first and second magnetic poles opposed to the salient poles of said rotor so that the phase difference between the output torque through said first magnetic poles and the output torque through said second magnetic poles is 60 degrees in electrical angle, and means for allowing the discharge of the stored magnetic energy of said exciting coils by the reversely connected diodes and the magnetic energy storage to be performed at a high speed, thereby to hold the occurrences of a reduced torque due to the rise portion of said exciting coils in the initial energization stage and of a counter-torque due to the extension of the fall portion thereof in the final energization stage at minimum values.