Motor drive control apparatus, motor drive control method and program of the same

A motor drive control method, comprising:

• generating a synchronous PWM signal in a first pulse pattern formed of multiple pulses defined in accordance with two or more parameters based on a voltage command value;
• and
• generating a synchronous PWM signal in a second pulse pattern formed of a single pulse based on a voltage command value, wherein the individual parameters are modified based on a change in voltage amplitude in switching pulse patterns between the first pulse pattern and the second pulse pattern.

A program of a motor drive control method which allows a computer to function as:

• a first pulse pattern generation processing module which generates a synchronous PWM signal in a first pulse pattern formed of multiple pulses defined in accordance with two or more parameters based on a voltage command value;
• and
• a second pulse pattern generation processing module which generates a synchronous PWM signal in a second pulse pattern formed of a single pulse based on a voltage command value, wherein the first pulse pattern generation processing module has a pulse pattern modification processing module which modifies the individual parameters based on a change in voltage amplitude in switching pulse patterns between the first pulse pattern and the second pulse pattern.