Controller for reluctance type synchronous motor

A controller including

• a reluctance type synchronous motor having, inside a rotor, magnetic force insulation means such that magnetic reluctance caused on a surface of the rotor made of soft magnetic material is different in a rotation direction viewed from a stator, whereby magnetomotive force due to the stator is generated penetrating a magnetic pole, where the magnetic reluctance is weak, for generation of a torque to rotate the magnetic pole of the rotor to move in a direction of the magnetomotive force,
• detection means for detecting a rotor position of the rotor, and,
• current command calculation means for obtaining a current command by adding an armature current command and a field current command at the rotor position for supplying a current to the synchronous motor, the controller comprising:
• a field current amplitude calculator for outputting a constant field current;
• and
• a phase shift calculator for calculating a phase shift amount by multiplying a code value output from a polarity judgment section referring to a torque command or an armature current, and a function referring to a torque command or an armature current amplitude,
• wherein
• the phase shift amount is calculated through multiplication using a coefficient according to a rotor speed.

A controller including

• a reluctance type synchronous motor having, inside a rotor, magnetic force insulation means such that magnetic reluctance caused on a surface of the rotor made of soft magnetic material is different in a rotation direction viewed from a stator, whereby magnetomotive force due to the stator is generated penetrating a magnetic pole, where the magnetic reluctance is weak, for generation of a torque to rotate the magnetic pole of the rotor to move in a direction of the magnetomotive force, detection means for detecting a rotor position of the rotor, and,
• current command calculation means for obtaining a current command by adding an armature current command and a field current command at the rotor position for supplying a current to the synchronous motor, the controller comprising:
• a field current amplitude calculation section for outputting a constant field current;
• and
• a field current compensator for referring a torque command or an armature current to add to the field current amplitude,
• wherein
• the armature current amplitude is multiplied by a compensation coefficient which is a function pattern in accordance with a rotor speed.