Excitation waveform determination device, motor drive device, excitation waveform determination method, motor drive method, and program

An excitation waveform determination method of determining an excitation waveform being a time waveform of an excitation signal that is supplied to a stator coil of a motor, the excitation waveform determination method comprising:

• a candidate solution setting step of setting a candidate solution group including one or more candidate solutions of the excitation waveform;
• an electromagnetic field analyzing step of calculating an electromagnetic force generated in a stator of the motor when the one or more candidate solution included in the candidate solution group is supplied to the motor, through execution of an electromagnetic field analysis;
• and an excitation waveform determining step of determining the excitation waveform based on a result of the execution of the electromagnetic field analysis by the electromagnetic field analyzing step, wherein the candidate solution setting step includes:
• an initial candidate solution setting step of setting an initial candidate solution group of initial one based on a fundamental wave condition specifies a fundamental wave of the excitation waveform, and a harmonic superimposition condition specifies a harmonic to be superimposed on the fundamental wave;
• and a candidate solution updating step of setting a new candidate solution group from the candidate solution group input therein wherein the excitation waveform determining step determines the excitation waveform from the initial candidate solution group or the new candidate solution group, the excitation waveform capable of suppressing a vibration of the motor;
• and a driving step of driving the motor based on the excitation waveform that has been determined.

A non-transitory computer-readable storage medium recording a program, executable by a computer processor including processing circuitry, for causing a computer to execute determination of an excitation waveform being a time waveform of an excitation signal that is supplied to a stator coil of a motor, the program causing a computer to execute:

• a candidate solution setting step of setting a candidate solution group including one or more candidate solutions of the excitation waveform;
• an electromagnetic field analyzing step of calculating an electromagnetic force generated in a stator of the motor when the one or more candidate solution included in the candidate solution group is supplied to the motor, through execution of an electromagnetic field analysis;
• and an excitation waveform determining step of determining the excitation waveform based on a result of the execution of the electromagnetic field analysis by the electromagnetic field analyzing step, wherein the candidate solution setting step includes:
• an initial candidate solution setting step of setting an initial candidate solution group based on a fundamental wave condition specifies a fundamental wave of the excitation waveform, and a harmonic superimposition condition specifies a harmonic to be superimposed on the fundamental wave;
• and a candidate solution updating step of setting a new candidate solution group from the candidate solution group input therein;
• wherein the excitation waveform determining step determines the excitation waveform from the initial candidate solution group or the new candidate solution group, the excitation waveform capable of suppressing a vibration of the motor;
• and a driving step of driving the motor based on the excitation waveform that has been determined.