Motor controller

A motor controller which controls a switched reluctance motor, the motor controller comprising:

• an inverter connected with a three-phase concentrated winding switched reluctance motor;
• a torque computation part which estimates or measures, as a calculated torque, a torque generated in the switched reluctance motor on the basis of an output from the inverter and a rotor angle of the switched reluctance motor;
• a magnetic flux computation part which estimates or measures, as a calculated phase magnetic flux, a phase magnetic flux of each phase generated in the switched reluctance motor on the basis of the output from the inverter and the rotor angle of the switched reluctance motor;
• and
• a switching control unit which controls the inverter by using at least a reference torque, which is a torque command value, and the calculated torque, wherein
• the switching control unit includes a minimum magnetic flux maintenance part,
• the minimum magnetic flux maintenance part controls the inverter such that the calculated phase magnetic flux of each phase becomes equal to or larger than a predetermined minimum value in a state where a rotational speed of the switched reluctance motor is above a predetermined speed,
• the predetermined minimum value is increased as the rotational speed of the switched reluctance motor increases, and
• the three-phase concentrated winding switched reluctance motor has a double salient pole structure with a rotor including a plurality of protrusions protruding toward a stator, and the stator includes a plurality of protrusions protruding toward the rotor.