Electric motor speed control apparatus and electric motor speed control method
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorsUfot Ufot EKONG, Takumi ITO, Masashi NAKAMURA
Life of this patent
Estimating the term…
Abstract
The electric motor speed control apparatus in an embodiment comprises a rotation speed estimation unit and a control unit. The rotation speed estimation unit generates an estimated value of a rotation speed of an electric motor by using a result of FFT analysis of a speed detection signal ωFBK, which is based on a detection result from a resolver for detecting the rotation speed of the electric motor, and the speed detection signal ωFBK. The control unit implements speed control so as to reduce deviation between the estimated value of the rotation speed and a speed command value for speed control of the electric motor.
Claims8
An electric motor speed control apparatus comprising:
- a rotation speed estimation unit that generates an estimated value of a rotation speed of an electric motor by using a result of FFT analysis of a speed detection signal ωFBK, which is based on a detection result from a resolver for detecting the rotation speed of the electric motor, and the speed detection signal ωFBK;
- and
- a control unit that implements speed control so as to reduce deviation between the estimated value of the rotation speed and a speed command value for speed control of the electric motor.
An electric motor speed control method that includes:
- steps of generating an estimated value of a rotation speed of an electric motor by using a result of FFT analysis of a speed detection signal ωFBK, which is based on a detection result from a resolver for detecting the rotation speed of the electric motor, and the speed detection signal ωFBK;
- and
- implementing speed control so as to reduce deviation between the estimated value of the rotation speed and a speed command value for speed control of the electric motor.
Dependencies are inferred from the claim text.