Patent ID: 11873039
Assignee: NSK LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A motor control device comprising:
a voltage command value calculation unit configured to calculate three-phase voltage command values to be applied to a three-phase motor;
a third harmonic calculation unit configured to calculate a first third harmonic on a basis of an average value between a voltage command value of a maximum phase with a maximum duty ratio and a voltage command value of a minimum phase with a minimum duty ratio among the three-phase voltage command values;
an amplitude calculation unit configured to calculate an amplitude of the three-phase voltage command values;
a third harmonic conversion unit configured to convert the first third harmonic into a second third harmonic on a basis of the first third harmonic and the amplitude;
a correction unit configured to correct the three-phase voltage command values by subtracting the second third harmonic from the three-phase voltage command values; and
a drive circuit configured to drive the three-phase motor on a basis of the corrected three-phase voltage command values.