Study on Monitoring Technology of PM Motor and Its Applications

Abstract

PM motors play an important role in the industrial applications due to their outstanding efficiency and convenience Generally speaking manufacturing process of motor can be classified as three stages: motor designing stage mass production stage and motor motor application stage This thesis proposed serval monitoring technologies of PM motors to examine the quality of motor in each stage In the motor designing stage a technique for quickly predicting the maximum efficiency of motor is presented based on two-port network description in this thesis Then in order to enhance quality of motor productions during the mass production stage a motor inspection system is proposed in this thesis which can measure back-emf constant rated speed and T-N curve within 40 seconds Finally in the motor application stage the development of self-diagnostic techniques is presented in this thesis to prevent the faults occurring in the servo motor which will lead to shut down in the production line Besides this thesis proposes a new measurement for monitoring dynamic changes of mechanical impedance without applying conventionally mechanical sensors based on a Chain Scattering Description and the Hilbert Huang Transform The proposed method is applied to the bone drilling system to detect the moment of bone breakthrough Theoretical analysis and experiments are conducted to evaluate the effectiveness of the all proposed methods

Date of Award	2019
Original language	English
Supervisor	Mi-Ching Tsai (Supervisor)