Patent ID: 11863093
Assignee: NIDEC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 1:
2. The motor control device according to claim 1, wherein
the weighting adjuster calculates a torque estimation value {circumflex over (T)} of the electric motor according to:

{circumflex over (T)}=(1−α)T1+αT2  (1)

where, T1 represents the first torque estimation value, T2 represents the second torque estimation value, and α(0≤α≤1) represents a weighting coefficient of the weighting adjustment; and
T1=Npp{(ϕiq+(Ld−Lq)idiq}, where Npp represents a number of motor pole pairs, Ld and Lq represent motor inductances in a rotation vector coordinate system, ϕ represents the coil interlinkage flux, and id and iq represent the motor currents, and T2=P/ωm, where P represents the motor input power, and ωm represents the motor rotational speed.