FBG Magnetostrictive Composite Flux Sensor Response Characterisation for Surface Permanent Magnet Rotor Flux Monitoring

2021 ◽  
Author(s):  
Asep Andi Suryandi ◽  
Inaki Erazo Damian ◽  
Sinisa Djurovic
Keyword(s):  
Permanent Magnet ◽  
Sensor Response ◽  
Rotor Flux ◽  
Flux Monitoring ◽  
Flux Sensor

Torque ripple optimization for synchronous reluctance motors based on a virtual permanent magnet harmonic machine model

2021 ◽  
Vol 67 (3) ◽  
pp. 327-338
Author(s):  
Yixiang Xu ◽  
Chong Di ◽  
Xiaohua Bao ◽  
Dongying Xu
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Torque Ripple ◽  
Air Gap ◽  
Analysis Model ◽  
Machine Model ◽  
Asymmetric Rotor ◽  
Rotor Flux ◽  
Air Gap Magnetic Field ◽  
Intermediate Variables

The torque ripple is affected by both the stator and the rotor magnetic field harmonics. In synchronous reluctance motors (SynRM), there are only rotor permeance harmonics existing on the rotor side for the absence of the rotor windings. Since the asymmetric rotor flux barriers are widely applied in the SynRM rotor, it is difficult to calculate the rotor permeance accurately by the analytical method. In this article, the effects of the rotor permeance harmonics on the air-gap magnetic field are studied by a virtual permanent magnet harmonic machine (VPMHM), which is a finite-element (FE) based magnetostatic analysis model. The air-gap flux density harmonics produced by the SynRM rotor are extracted from the VPMHM model and used as the intermediate variables for the torque ripple optimization. The proposed method does not need to solve the transient process of motor motion. Hence, the time of the optimization process can be significantly shortened. Finally, a full electric cycle is simulated by dynamic FE simulation, and the torque ripple is proved to be effectively reduced.

scholarly journals Demagnetization investigation of a partitioned rotor flux switching machine with hybrid permanent magnet

AIP Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 056636 ◽  
Author(s):  
Deyang Fan ◽  
Li Quan ◽  
Xiaoyong Zhu ◽  
Zixuan Xiang ◽  
Wenye Wu
Keyword(s):  
Permanent Magnet ◽  
Rotor Flux

A Hybrid Method for Measuring Heat Flux

2009 ◽  
Vol 132 (3) ◽  
Author(s):  
David O. Hubble ◽  
Tom E. Diller
Keyword(s):  
Heat Flux ◽  
Hybrid Method ◽  
Sensor Response ◽  
Time Response ◽  
Heat Flux Sensor ◽  
Response Accuracy ◽  
Temporal Response ◽  
Heat Flux Sensors ◽  
Flux Measurements ◽  
Flux Sensor

The development and evaluation of a novel hybrid method for obtaining heat flux measurements is presented. By combining the spatial and temporal temperature measurements of a heat flux sensor, the time response, accuracy, and versatility of the sensor is improved. Sensors utilizing the hybrid method are able to make heat flux measurements on both high and low conductivity materials. It is shown that changing the thermal conductivity of the backing material four orders of magnitude causes only an 11% change in sensor response. The hybrid method also increases the time response of heat flux sensors. The temporal response is shown to increase by up to a factor of 28 compared with a standard spatial sensor. The hybrid method is tested both numerically and experimentally on both high and low conductivity materials and demonstrates significant improvement compared with operating the sensor as a spatial or temporal sensor alone.

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