ENGINE CONTROL EQUIPMENT, ENGINES, COMPRESSORS, REFRIGERATION EQUIPMENT AND VEHICLES

Abstract

The invention relates to a motor control device configured to convert an input power source supplied from a power supply into an output AC power source with a predetermined voltage and frequency. The motor control device includes a frequency converter circuit configured to supply an output AC power source to the motor, and configured to perform control to suppress the amplitude of the first harmonic component occurring synchronous with the motor's rotational speed in the input power to the motor at a value lower than or equal to a predetermined value, and to suppress the amplitude of the second harmonic component occurring in the excitation force of the motor at the same frequency as the first harmonic component, lower than the amplitude of the second harmonic component in the case where the amplitude of the first harmonic component is suppressed to a minimum. The invention also relates to motors, compressors, refrigeration equipment, and vehicles.