Patent ID: 8604739

Claim:
A controller for an axial gap-type motor, comprising: a rotor having a permanent magnet; a first stator and a second stator oppositely disposed in an axial direction of revolution of the rotor with the rotor being interposed therebetween; an electrification control portion configured to: supply a torque current for generating a magnetic field to revolve the rotor to a first armature winding of the first stator, and a field current for reinforcing or weakening a magnetic flux generated by the permanent magnet of the rotor to a second armature winding of the second stator, configure an equivalent circuit of two-phase direct currents for the motor in a d-q coordinate system having a d axis armature along a field direction of the rotor and a q axis armature orthogonal to the d axis, and supply an electric current to the first armature winding at the q axis as the torque current and an electric current to the second armature winding at the d axis as the field current; and a terminal voltage detection portion configured to detect a terminal voltage of the first armature winding of the first stator, wherein the electrification control portion is further configured to supply the field current to the second armature winding of the second stator to weaken the magnetic flux generated by the permanent magnet of the rotor when the terminal voltage of the first armature winding of the first stator is equal to or greater than a defined value as the rotor is revolving.