scholarly journals Teeth Arrangement and Pole–Slot Combination Design for PMLSM Detent Force Reduction

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8141
Author(s):  
Shi-Uk Chung ◽  
Ji-Young Lee
Keyword(s):  
Permanent Magnet ◽  
Position Control ◽  
Design Method ◽  
Synchronous Motors ◽  
Detent Force ◽  
Linear Synchronous Motors ◽  
Force Reduction

This paper introduces and investigates a new design method that employs both teeth arrangement and pole–slot combination to reduce the detent force of permanent magnet linear synchronous motors (PMLSMs) for precision position control. The proposed topology is a 10-pole, 12-slot-based PMLSM comprising two sections that significantly reduce the detent force without implementing a skewing design. It was analytically and experimentally confirmed that the proposed design effectively reduces detent force with a negligible sacrifice of mover length. The general characteristics and servo performance of the proposed PMLSM were experimentally examined and then discussed.

Sensorless Position Control of Surface Permanent Magnet Linear Synchronous Motors

2011 ◽  
Vol 88-89 ◽  
pp. 165-169
Author(s):  
Hua Cai Lu ◽  
Ming Jiang ◽  
Qi Gong Chen ◽  
Li Sheng Wei
Keyword(s):  
Permanent Magnet ◽  
Closed Loop ◽  
Position Control ◽  
High Gain ◽  
Initial Position ◽  
Practical Implementation ◽  
Model Estimation ◽  
Synchronous Motors ◽  
Linear Synchronous Motors ◽  
Motor Model

In this paper, a novel sensorless position control for a surface permanent magnet linear synchronous motor (SPMLSM) is presented. The position and speed of the SPMLSM drive is obtained through a closed loop observer by only measuring phase voltages and currents. Estimation of speed is done using difference between estimates of the current derivatives in the dq frame, which calculated two different ways: first using a high-gain observer, and then using the motor model. Estimation of the mover position is done through integrating the estimation of speed. The proposed scheme works in a closed loop fashion. It enhances the allowable initial position error; can be used without any physical modification; does not rely on motor saliency and requires no knowledge of the load. Results from numerical simulations and practical implementation are presented to validate the proposed schemes.

Detent force minimization techniques in permanent magnet linear synchronous motors

2002 ◽  
Vol 38 (2) ◽  
pp. 1157-1160 ◽  
Author(s):  
Ki-Chae Lim ◽  
Joon-Keun Woo ◽  
Gyu-Hong Kang ◽  
Jung-Pyo Hong ◽  
Gyu-Tak Kim
Keyword(s):  
Permanent Magnet ◽  
Synchronous Motors ◽  
Detent Force ◽  
Linear Synchronous Motors

Research on the End Effect Detent Force Reduction of Permanent Magnet Linear Synchronous Motor with Auxiliary Poles One-Piece Structure

2013 ◽  
Vol 416-417 ◽  
pp. 27-32
Author(s):  
He Zhang ◽  
Bao Quan Kou ◽  
Shou Lun Guo ◽  
Hai Lin Zhang ◽  
Yin Xi Jin ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Synchronous Motor ◽  
Linear Motor ◽  
End Effect ◽  
Detent Force ◽  
Linear Synchronous Motor ◽  
Force Reduction ◽  
The One

In order to minimize the detent force of permanent magnet linear synchronous motor (PMLSM) caused by end effect, a novel auxiliary poles one-piece structure is proposed. Two auxiliary poles are extended directly from two ends of the armature core. And magnetic isolation bridges are set between auxiliary pole and armature core. Compared with the conventional discrete auxiliary poles, the one-piece structure will reduce the manufacture difficulty of PMLSM with auxiliary poles and improve the reliability of linear motor.

Sign in / Sign up

Export Citation Format

Share Document