公开(公告)号：US09431949B2

公开(公告)日：2016-08-30

申请号：US14264332

申请日：2014-04-29

Applicant: General Electric Company

Inventor： Pinjia Zhang ,  Prabhakar Neti ,  Patel Bhageerath Reddy

IPC: H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  H02P23/08 ,  H02P23/14 ,  H02P27/02

CPC classification number: H02P23/08 ,  H02P21/18 ,  H02P23/14 ,  H02P23/16 ,  H02P27/026 ,  H02P29/0241

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.

Abstract translation: 用于估计感应电动机的速度的方法包括向感应电动机施加电压并测量感应电动机的电流。 然后确定电流的当前快速傅立叶变换（FFT），并且基于当前FFT来计算感应电动机的滑差。 然后基于感应电动机的滑移来估计感应电动机的速度。