scholarly journals Simulation and Experimental Verification of a HB-Type Vernier Motor

2013 ◽  
Vol 3 (1) ◽  
pp. 338-344
Author(s):  
R. H. Thejel ◽  
H. A. Hairik ◽  
M. A. Alwan
Keyword(s):  
Experimental Verification ◽  
Torque Ripple ◽  
Direct Drive ◽  
Matlab Simulation ◽  
Drive Circuit ◽  
High Torque ◽  
Simulation Results ◽  
Low Torque ◽  
Rotor Structure ◽  
Load Conditions

Direct drive motors are used as actuators in numerous applications in which they must rotate at low speeds with high torque and low torque ripple. Various types of vernier motors have been studied recently. The HB type vernier motor is one of them. Its rotor structure is the same as in a HB type stepping motor but has a field winding at the rotor and has multiphase windings in the stator. In the present work, a Matlab simulation of a HB type vernier motor is presented. To validate the motor results and response, the authors fabricated the motor and implemented its drive circuit. The motor was tested for different load conditions. Experimental results are found identical to simulation results and it is also shown that the motor has low torque ripple.

Direct Torque Control Using Fuzzy and Neural as Switching Vector Selector for Doubly Fed IM

2013 ◽  
Vol 646 ◽  
pp. 134-138
Author(s):  
Fethia Hamidia ◽  
Abdelakader Larabi ◽  
Mohamed Seghir Boucherit
Keyword(s):  
Direct Torque Control ◽  
Torque Ripple ◽  
Torque Control ◽  
Switching Frequency ◽  
Load Torque ◽  
Control Approach ◽  
High Torque ◽  
Simulation Results ◽  
Low Torque ◽  
Doubly Fed

The conventional Direct Torque Control approach has some drawbacks such as high torque ripple and switching frequency, which is varying with speed, load torque and the selected hysteresis bands, this paper discuss the application of neural network and fuzzy logic on DTC of Doubly fed induction motor DFIM, the proposed techniques having the advantages of low torque and flux ripples. Simulation results emphasize the good performance of the fuzzy and neural techniques.

Study and design of dual stator permanent magnet machine with spoke-type configurations using phase-group concentrated-coil windings

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1381-1389
Author(s):  
Dezhi Chen ◽  
Chengwu Diao ◽  
Zhiyu Feng ◽  
Shichong Zhang ◽  
Wenliang Zhao
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Low Cost ◽  
Dynamic Performance ◽  
Torque Ripple ◽  
Permanent Magnet Machine ◽  
Torque Density ◽  
Phase Group ◽  
High Torque ◽  
Simulation Results

In this paper, a novel dual-stator permanent magnet machine (DsPmSynM) with low cost and high torque density is designed. The winding part of the DsPmSynM adopts phase-group concentrated-coil windings, and the permanent magnets are arranged by spoke-type. Firstly, the winding structure reduces the amount of copper at the end of the winding. Secondly, the electromagnetic torque ripple of DsPmSynM is suppressed by reducing the cogging torque. Furthermore, the dynamic performance of DsPmSynM is studied. Finally, the experimental results are compared with the simulation results.

An Improved Switching Table for PMSM DTC Drive Used in Electrical Vehicle

2011 ◽  
Vol 97-98 ◽  
pp. 1091-1097
Author(s):  
Yan Jing Meng ◽  
Yao Hua Li ◽  
Meng Xiao Wang
Keyword(s):  
Torque Ripple ◽  
Good Choice ◽  
Control Performance ◽  
Electrical Vehicle ◽  
High Torque ◽  
Simulation Results ◽  
Control Configuration ◽  
Torque Ripples ◽  
Hysteresis Control ◽  
Fast Dynamic

The DTC for PMSM possesses many advantages: simple control configuration, lesser parameters dependence and fast dynamic response and is a good choice for the drive of EV. But the DTC suffers from high torque ripples. The switching table is used as the hysteresis control rule that determines the control performance. An improved switching table is proposed based on effects of voltage vectors on the drive. Simulation results show this switching table can suppress torque ripple compared to the conventional switching table.

Development and Application of Low-Speed and High-Torque Permanent Magnet Synchronous Motor

2012 ◽  
Vol 229-231 ◽  
pp. 888-894 ◽  
Author(s):  
Jun Guo Cui ◽  
Wen Sheng Xiao ◽  
Jian Bo Zhao ◽  
Jing Xi Lei ◽  
Xiao Dong Wu ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Economic Benefits ◽  
Direct Drive ◽  
Low Speed ◽  
Wide Range ◽  
High Torque ◽  
Pumping Unit

To meet the demands of direct-drive petroleum equipment, developed a low-speed and high-torque permanent magnet synchronous motor. By analyzing and identifying the suitable key parameters such as permanent magnet structure parameters, air gap length, type and size of Stator Slot and so on, designed permanent magnet synchronous motor with the torque 10800 Nm, the rated speed 30 r/min and high efficiency and power factor. Obtained the flux density distribution situation and characteristic curves under no-load working condition through simulation and analysis. Manufactured the low-speed and high-torque permanent magnet synchronous motor and applied it to pumping unit. Test results show that this motor has many advantages such as wide range of speed regulation, small torque ripple, smooth operation and other characteristics. The Direct-drive Pumping Unit used this permanent magnet synchronous motor can save 20% energy than the beam pumping unit, so its social and economic benefits are significant.

scholarly journals Torque Ripple Optimization of a Novel Cylindrical Arc Permanent Magnet Synchronous Motor Used in a Large Telescope

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 362
Author(s):  
Shuhua Fang ◽  
Songhan Xue ◽  
Zhenbao Pan ◽  
Hui Yang ◽  
Heyun Lin
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Direct Drive ◽  
Large Telescope ◽  
Tracking Accuracy ◽  
Cogging Torque ◽  
Low Torque ◽  
Large Telescopes

This paper proposes the use of a novel cylindrical arc permanent magnet synchronous motor (CAPMSM) in a large telescope, which requires high positioning accuracy and low torque ripple. A 2D finite element method was used to analyze the cogging torque of the CAPMSM. The CAPMSM can be an alternative for a rotating motor to realize direct drive. A new method is proposed to separate the cogging torque, Tcog, into the torque, Tslot, generated by the slotted effect and the end torque, Tend, generated by the end effect. The average torque and the torque ripple are optimized considering stator center angle, the angle between two adjacent stators and the unequal thickness of a Halbach permanent magnet. The torque ripple decreased from 31.73% to 1.17%, which can satisfy the requirement of tracking accuracy for large telescopes.

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