A Novel Moving Coil Linear-Rotary Electromagnetic Actuator based on Unipolar Permanent Magnet

2019 ◽  
Author(s):  
Rui Ma ◽  
Fengge Zhang ◽  
Jinhua Chen ◽  
Chi Zhang ◽  
Xianbei Sun
Keyword(s):  
Permanent Magnet ◽  
Electromagnetic Actuator

OPTIMIZATION OF THE FORCE CHARACTERISTIC OF ROTARY MOTION TYPE OF ELECTROMAGNETIC ACTUATOR BASED ON FINITE ELEMENT ANALYSIS

2016 ◽  
Vol 78 (9) ◽  
Author(s):  
Izzati Yusri ◽  
Mariam Md Ghazaly ◽  
Esmail Ali Ali Alandoli ◽  
Mohd Fua'ad Rahmat ◽  
Zulkeflee Abdullah ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Permanent Magnets ◽  
Thrust Force ◽  
Rotary Motion ◽  
Electromagnetic Actuator ◽  
Element Analysis ◽  
Electromagnetic Actuators ◽  
Motion Type

This paper addresses a rotary motion type of electromagnetic actuator that compares two types of electromagnetic actuators; i.e the Permanent Magnet Switching Flux (PMSF) and the Switching Reluctance (SR) actuator. The Permanent Magnet Switching Flux (PMSF) actuator is the combination of permanent magnets (PM) and the Switching Reluctance (SR) actuator. The force optimizations are accomplished by manipulating the actuator parameters; i.e. (i) the poles ratio of the stator and rotor; (ii) the actuator’s size; (iii) the number of winding turns; and (iv) the air gap thickness between the stator and rotor through Finite Element Analysis Method (FEM) using the ANSYS Maxwell 3D software. The materials implemented in the actuator’s parameters optimizations are readily available materials, especially in Malaysia. The excitation current used in FEM analysis for both actuators was between 0A and 2A with interval of 0.25A. Based on the FEM analyses, the best result was achieved by the Permanent Magnet Switching Flux (PMSF) actuator. The PMSF actuator produced the largest magnetostatic thrust force (4.36kN) once the size is scaled up to 100% with the input current, 2A respectively. The maximum thrust force generated by the Switching Reluctance (SR) actuator was 168.85μN, which is significantly lower in compared to the results of the PMSF actuator. 

A new measurement method for operation mode dependent dynamic behavior of magnetorheological fluid

2016 ◽  
Vol 231 (18) ◽  
pp. 3358-3369 ◽  
Author(s):  
S Kaluvan ◽  
JH Park ◽  
YS Lee ◽  
MS Han ◽  
SB Choi
Keyword(s):  
Permanent Magnet ◽  
Measurement System ◽  
Measurement Method ◽  
Magnetorheological Fluid ◽  
Electromagnetic Actuator ◽  
Coupled Mode ◽  
Mode Operation ◽  
Damping Behavior ◽  
Dynamic Damping ◽  
Cantilever Rod

This paper presents a new measurement method to investigate the operational mode dependent dynamic behavior of magnetorheological fluid. The proposed measurement system is designed using an electromagnetically actuating cylindrical rod coupled with the magnetorheological fluid squeezing setup. The cylindrical rod is clamped to base at one end and the other end is free to move in the z- and y-axis. A disc-type permanent magnet is attached to the free end of the cantilever rod and an electromagnetic actuator is placed nearer to the permanent magnet. The magnetorheological fluid squeezing setup is mounted nearer to the fixed end. The magnetorheological squeezing setup is designed using two electromagnetic coils placed face to face in z-axis with the gap of “ d”. The magnetorheological fluid is placed between the gap “ d” to form the squeezing effect. The direction of vibration of the cantilever rod to bottom surface is determined by the angular position of electromagnetic actuator. The actuator position is fixed to the desired angle with the help of stepper motor setup. The horizontal direction of vibration of cantilever rod produces the shear mode operation of the magnetorheological fluid in the magnetorheological fluid squeezing setup. Similarly, the vertical and intermediate direction of vibration of rod produces the squeeze and coupled mode operation of the magnetorheological fluid, respectively. The analytical and experiment analyses to determine the dynamic damping behavior of the magnetorheological particles for various directions of actuation angle is undertaken using the proposed measurement system. The analytical model of the proposed measurement system is firstly derived and the experimental setup is then developed in real-time laboratory environment. The analytical and experimental results show that the dynamic damping behavior of squeeze mode operation of the magnetorheological fluid is superior to the shear and coupled mode operation of the magnetorheological fluid. The effectiveness and novelty of the proposed measurement system is demonstrated by presenting dynamic force variation and vibration amplitude reduction at different modes like squeeze, shear, and intermediate mode operation of the magnetorheological fluid.

Design of an Electromagnetic Actuator Suitable for Production by Rapid Prototyping

2011 ◽  
Author(s):  
Matthew S. Moses ◽  
Gregory S. Chirikjian
Keyword(s):  
Rapid Prototyping ◽  
Permanent Magnet ◽  
Electric Motor ◽  
Electromagnetic Actuator ◽  
3D Printer ◽  
Permanent Magnet Motor ◽  
Roller Bearings ◽  
System A ◽  
Factors Influencing ◽  
Coil Geometry

This paper presents a design for an electric motor that can potentially be produced by a personal 3D printer. The concept of a Cyclic Fabrication System — a network of tools, machines, and processes capable of producing all of its constituent components — is discussed in order to provide context for the various factors influencing the design. The motor is an axial-airgap permanent-magnet motor with a flat 2-layer coil. The coil pattern makes minimal use of crossovers or vias, and is well-suited to several methods for fabricating conductive structures that are currently under development. A versatile MATLAB script is presented which is used to generate the coil pattern. Coil geometry is controlled parametrically, and it is straightforward to generate a wide variety of coils, corresponding to different arrangements of magnets and desired coil spacings. The motor uses plastic roller bearings that are easily fabricated.

Novel Electromagnetic Actuator Using a Permanent Magnet and an Inter-Locking Mechanism for a Magnetic Switch

2013 ◽  
Vol 49 (5) ◽  
pp. 2229-2232 ◽  
Author(s):  
Dong-Jin Cho ◽  
Dong-Kyun Woo ◽  
Jong-Suk Ro ◽  
Tae-Kyung Chung ◽  
Hyun-Kyo Jung
Keyword(s):  
Permanent Magnet ◽  
Electromagnetic Actuator ◽  
Magnetic Switch ◽  
Locking Mechanism

A Bi-Axial Scanning Micro Mirror Using an Electromagnetic Actuator

2017 ◽  
Author(s):  
Buhyun Shin ◽  
Dongho Oh ◽  
Kyung-min Lee
Keyword(s):  
Permanent Magnet ◽  
Deflection Angle ◽  
Experimental Result ◽  
Electromagnetic Actuator ◽  
The Deflection Angle ◽  
Axial Scanning

In this paper, we present a design, simulation, and experimental result of a bi-axial scanning micro mirror driven by electromagnetic actuator. The mirror has a double gimbal structure for non-resonant operation and the electromagnetic actuator is composed of one permanent magnet and four electromagnets located in four directions on the base frame. The permanent magnet is attached to the back of the mirror and it position is controlled by current of the four electromagnetic magnets. The size of the mirror is 8 mm × 8 mm and the overall size of the mirror and actuator is 20 mm × 20 mm × 13 mm (W × D × H). We perform simulations and experiments of the electromagnetic actuator and the bi-axial scanning micro mirror. The motor constant and restoring constant of the developed electromagnetic actuator is 3.41 mNm/A and 1.75 mNm/rad, respectively. The deflection angle of the developed bi-axial scanning micro mirror is measured to be over than ± 40 degree.

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