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US 2015/0311849 A1Published application
Induction motor speed estimation
AssigneeGeneral Electric Company
InventorsPinjia Zhang, Prabhakar Neti, Patel Bhageerath Reddy
Life of this patent
Estimating the term…
Abstract
A method for estimating a speed of an induction motor includes applying a voltage to the induction motor and measuring a current of the induction motor. A current fast fourier transform (FFT) of the current is then determined and a slip of the induction motor is calculated based on the current FFT. A speed of the induction motor is then estimated based on the slip of the induction motor.
Claims20
A method for estimating a speed of an induction motor, comprising
- applying a voltage to the induction motor;
- measuring a current of the induction motor;
- determining a current fast fourier transform (FFT) of the current;
- determining a slip of the induction motor based on the current FFT;
- and
- estimating the speed of the induction motor based on the slip of the induction motor.
3 more elements
A system, comprising:
- a power supply to provide a voltage to an induction motor;
- a measurement unit to measure a current of the induction motor;
- a processor to estimate a speed of the induction motor, the processor comprising:
- a fast fourier transform (FFT) module to determine a current FFT of the current;
- a slip calculation module to determine a slip of the induction motor based on the current FFT;
- and
- a speed calculation module to estimate a speed of the induction motor based on the slip of the induction motor.
4 more elements
Dependencies are inferred from the claim text.