Cogging Force Analysis of Moving Magnet Type Permanent Magnet Synchronous Linear Servo Motor

2015 ◽  
Vol 741 ◽  
pp. 663-668
Author(s):  
Zhi Gang Shen ◽  
Qing Wang ◽  
Qing Jie Sun ◽  
Hong Xing Wu
Keyword(s):  
Permanent Magnet ◽  
Structural Characteristics ◽  
Linear Motor ◽  
Middle Part ◽  
Servo Motor ◽  
Direct Drive ◽  
Force Analysis ◽  
Detent Force ◽  
Maximum Value ◽  
Moving Magnet

Linear motor eliminates the middle part of mechanical drive train, but because of structural characteristics of itself, must to take effective measures to reduce thrust fluctuations, or direct drive will lost its original meaning. In this paper, firstly research on detent force of moving magnet type permanent magnet synchronous linear servo motor and analyze the principle of generate detent force, secondly analyze the cogging force of moving magnet type permanent magnet synchronous linear motor and obtain the expression of cogging force maximum value, finally propose effective method to reduce detent force.

Dynamic Simulation of a Direct Drive Reversing Valve Based on the Hydraulic Die Forging Hammer

2016 ◽  
Author(s):  
Muzhi Zhu ◽  
Shengdun Zhao
Keyword(s):  
Permanent Magnet ◽  
Control Volume ◽  
Linear Motor ◽  
Field Analysis ◽  
Magnetic Flux Density ◽  
Direct Drive ◽  
Force Analysis ◽  
Fluid Force ◽  
Die Forging ◽  
Permanent Magnet Linear Motor

The direct drive reversing valve is designed in this paper to replace the main reversing valve of the hydraulic die forging hammer system, and a new drive method based on TPMLM (tubular permanent magnet linear motor) is suggested. To verify the feasibility of the drive method, the fluid force suffered by valve core is calculated by using control volume method. After that, force analysis is carried out on the valve core. Based on FLUENT, the flow field analysis inside the valve is conducted. And then theoretical calculation and simulation on the fluid force analysis are discussed. TPMLM (tubular permanent magnet linear motor) is selected as the driving device and it is analyzed by Maxwell 2D. The simulation results of TPMLM show that the magnetic flux density, back electromotive force and output force satisfy the requirement of the reversing valve.

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.

scholarly journals MINIMIZING THE DETENT FORCE IN PERMANENT MAGNET LINEAR SYNCHRONOUS MOTOR FOR DRIVING OF 2D LASER MARKING TABLE

2017 ◽  
Vol 3 ◽  
pp. 174
Author(s):  
Lyubomir Lazov ◽  
Peter Uzunov
Keyword(s):  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Substantial Reduction ◽  
Synchronous Motor ◽  
Linear Motor ◽  
The Finite Element Method ◽  
Movable Part ◽  
Laser Marking ◽  
Detent Force ◽  
Linear Synchronous Motor

In this paper the research results for reducing the detent force in one innovative permanent magnet linear synchronous motor for 2D laser marking system was published. There two methods are used. The first of these methods features the usage of two additional end teeth with chamfers in the magnetic circuit of the movable part. In the second method, the teeth of the ferromagnetic core are with different lengths. As a result of the change of the air gap permeance in both cases substantial reduction of detent force is achieved, in multiples at times. The results obtained are based on modeling and analyzing the linear motor magnetic field by the Finite Element Method (FEM). Provided experimental research of the linear motor prototype proves the correctness of the simulations results.

Sign in / Sign up

Export Citation Format

Share Document