Examination of a Sensorless Rotor-Position-Measurement Method for Switched Reluctance Drive

2008 ◽  
Vol 55 (1) ◽  
pp. 288-295 ◽  
Author(s):  
Ibrahim H. Al-Bahadly
Keyword(s):  
Measurement Method ◽  
Position Measurement ◽  
Switched Reluctance ◽  
Rotor Position

scholarly journals A New Rotor Position Measurement Method for Permanent Magnet Spherical Motors

2018 ◽  
Vol 8 (12) ◽  
pp. 2415 ◽  
Author(s):  
Yin Lu ◽  
Cungang Hu ◽  
Qunjing Wang ◽  
Yi Hong ◽  
Weixiang Shen ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Measurement Method ◽  
Coordinate Frame ◽  
Feature Points ◽  
Position Measurement ◽  
Experimental Platform ◽  
Rotor Position ◽  
Straight Line ◽  
The World

This paper proposes a new high-precision rotor position measurement (RPM) method for permanent magnet spherical motors (PMSMs). In the proposed method, a LED light spot generation module (LSGM) was installed at the top of the rotor shaft. In the LSGM, three LEDs were arranged in a straight line with different distances between them, which were formed as three optical feature points (OFPs). The images of the three OFPs acquired by a high-speed camera were used to calculate the rotor position of PMSMs in the world coordinate frame. An experimental platform was built to verify the effectiveness of the proposed RPM method.

scholarly journals Numerical Investigation on Vibration Performance of an Improved Switched Reluctance Machine with Double Auxiliary Slots

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Zhengyuan Gao ◽  
Shanming Wang ◽  
Zhiguo An ◽  
Pengfei Sun
Keyword(s):  
Acoustic Noise ◽  
Structural Characteristics ◽  
Orthogonal Experimental Design ◽  
Switched Reluctance Machine ◽  
Switched Reluctance ◽  
Rotor Position ◽  
Turn On ◽  
Reluctance Machine ◽  
Noise Limit ◽  
Optimal Set

Considerable vibration and acoustic noise limit the further application of Switched Reluctance Machine (SRM) due to its structural characteristics and working principle. An improved SRM model with double auxiliary slots (DAS) was proposed, in which the direction of the magnetic line of force was adjusted, and the radial magnetic density in the air gap was reduced by changing the local tooth profiles of the stator and the rotor. The effects of initial rotor position and turn-on angle and turn-off angle on radial Electromagnetic Force (EMF) and maximum torque were investigated. The results indicate the radial EMF and torque increase significantly with the advancement of the turn-on angle or the delay of the turn-off angle. In the orthogonal experimental design, initial rotor position, turn-on angle, and turn-off angle were taken as the factors, and the optimal set of parameters that minimized radial EMF was determined according to a greater output torque. In contrast to conventional SRM, the radial EMF of the SRM with DAS significantly reduces when the optimal set is applied.

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