公开(公告)号：US10215784B1

公开(公告)日：2019-02-26

申请号：US15832942

申请日：2017-12-06

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chun-Han Chen ,  Chun-Hsiang Yang ,  Yung-Jen Cheng ,  Ming-Fa Tsai ,  Ying-Che Weng

IPC: H02M5/42 ,  H02M5/45 ,  H02P21/02 ,  G01R21/133 ,  H03L7/08 ,  G01R25/00 ,  H02P23/00 ,  H02P23/14

Abstract: A measuring system, during a measurement process thereof, uses a phase-locked loop mechanism of a stator phase voltage and a stator phase current of a three-phase AC motor to effectively remove harmonics and to sense and obtain the amplitude effective values of the phase voltage and the phase current of the three-phase AC motor and the phase difference between the phase voltage and phase current. Therefore, the measuring apparatus is capable of quickly and accurately calculating the input power of the motor without having to measure the parameters of the motor.