Analysis of a Novel Multi-Tooth Flux-Switching PM Brushless AC Machine for High Torque Direct-Drive Applications

2008 ◽  
Vol 44 (11) ◽  
pp. 4313-4316 ◽  
Author(s):  
Z.Q. Zhu ◽  
J.T. Chen ◽  
Y. Pang ◽  
D. Howe ◽  
S. Iwasaki ◽  
...  
Keyword(s):  
Direct Drive ◽  
High Torque

Design of a Kind of Novel Limited-Angle Brushless Torque Motor

2012 ◽  
Vol 468-471 ◽  
pp. 871-874 ◽  
Author(s):  
Zhan Ting Fan ◽  
Wei Guo Liu ◽  
An Chao He
Keyword(s):  
Automatic Control ◽  
High Reliability ◽  
Basic Structure ◽  
Electromagnetic Torque ◽  
Test Results ◽  
Direct Drive ◽  
Electrical Drive ◽  
Welding Equipment ◽  
High Torque ◽  
Limited Angle

A kind of 5Nm prototype LABLTM (Limited-Angle Brushless Torque Motor) is presented and designed. The basic structure of the motor is deliberated. The method of calculating the electromagnetic torque is provided. The Magnet software is used to optimize some important parameters of the motor. The prototype is fabricated. The test results of the prototype indicate that the LABLTM, with high torque and high reliability, does meet the requirements of direct drive actuator of precision welding equipment. It has a promising future in automatic control, electrical drive, etc.

scholarly journals Control of a Direct-Drive Arm

1983 ◽  
Vol 105 (3) ◽  
pp. 136-142 ◽  
Author(s):  
H. Asada ◽  
T. Kanade ◽  
I. Takeyama
Keyword(s):  
Drive System ◽  
Direct Drive ◽  
Excellent Performance ◽  
Mechanical Stiffness ◽  
Feedback Controllers ◽  
Transmission Mechanisms ◽  
Single Link ◽  
High Torque ◽  
Drive Systems ◽  
Speed And Accuracy

A direct-drive arm is a mechanical arm in which the shafts of articulated joints are directly coupled to the rotors of motors with high torque. Since the arm does not contain transmission mechanisms between the motors and their loads, the drive system has no backlash, small friction, and high mechanical stiffness, all of which are desirable for fast, accurate, and versatile robots. First, the prototype robot is described, and basic feedback controllers for single-link drive systems are designed. Second, feedforward compensation is discussed. This compensation significantly reduces the effect of interactions among multiple joints and nonlinear forces. The experiments showed the excellent performance of the direct-drive arm in terms of speed and accuracy.

scholarly journals A High-Torque Magnetless Axial-Flux Doubly Salient Machine for In-Wheel Direct Drive Applications

2014 ◽  
Vol 50 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Christopher H. T. Lee ◽  
K. T. Chau ◽  
Chunhua Liu ◽  
T. W. Ching ◽  
Fuhua Li
Keyword(s):  
Direct Drive ◽  
Axial Flux ◽  
Doubly Salient ◽  
High Torque

scholarly journals Investigation of a New Flux-Modulated Permanent Magnet Brushless Motor for EVs

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Ying Fan ◽  
Lingling Gu ◽  
Yong Luo ◽  
Xuedong Han ◽  
Ming Cheng
Keyword(s):  
High Speed ◽  
Simple Structure ◽  
Static Characteristics ◽  
Direct Drive ◽  
Element Analysis ◽  
Torque Density ◽  
Brushless Motor ◽  
Design Requirements ◽  
High Torque ◽  
Compact Design

This paper presents a flux-modulated direct drive (FMDD) motor. The key is to integrate the magnetic gear with the PM motor while removing the gear inner-rotor. Hence, the proposed FMDD motor can achieve the low-speed high-torque output and high-speed compact design requirements as well as high-torque density with a simple structure. The output power equation is analytically derived. By using finite element analysis (FEA), the static characteristics of the proposed motor are obtained. Based on these characteristics, the system mathematical model can be established. Hence, the evaluation of system performances is conducted by computer simulation using the Matlab/Simulink. A prototype is designed and built for experimentation. Experimental results are given to verify the theoretical analysis and simulation.

scholarly journals A Novel Direct-Drive Permanent Magnet Synchronous Motor with Toroidal Windings

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 432 ◽  
Author(s):  
Caixia Gao ◽  
Mengzhen Gao ◽  
Jikai Si ◽  
Yihua Hu ◽  
Chun Gan
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Finite Element Models ◽  
The Novel ◽  
Direct Drive ◽  
Low Speed ◽  
Field Versus ◽  
Drive Motor ◽  
High Torque

A direct-drive motor has the merits of low speed, high torque, and elimination of mechanical deceleration mechanisms, and is widely used in various fields. A novel direct-drive permanent magnet synchronous motor is presented herein, in which all coils are wrapped around the stator yoke in the same orientation. The structure of the novel direct-drive permanent magnet synchronous motor with toroidal windings (N-TWDDPMSM) is introduced and its operating principle is analyzed by describing the variation in the armature magnet field versus time. Furthermore, based on the same power grade and mechanical size, several finite-element models of motors with different windings are established using Magnet software to analyze the distribution of magnetic field, back-electromotive force (back-EMF), power-angle characteristics, loss characteristics, etc. Compared with the traditional permanent magnet synchronous motor (T-PMSM), the traditional permanent magnet synchronous motor with toroidal windings (T-TWPMSM), and the N-TWDDPMSM, the N-TWDDPMSM shows advantages of low speed and high torque, and the feasibility and superiority of the N-TWDDPMSM are verified.

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.

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