• Title, Summary, Keyword: electromagnetic actuator

Search Result 220, Processing Time 0.039 seconds

Design of Hybrid Electromagnetic Actuator against Microvibration (미진동 저감을 위한 복합형 전자기식 액추에이터 설계)

  • Moon, S.J.;Choi, S.M.;Jeong, J.A.;Kim, C.H.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • /
    • pp.299-304
    • /
    • 2009
  • A hybrid electromagnetic actuator with an air spring is designed so as to achieve the desired isolation reduce the vibration efficiency on the floor vibration. The performance specification of the hybrid electromagnetic actuator is determined based on the vibration criterion for vibration-sensitive equipment. In basic design stage of the electromagnetic actuator, the simple reluctance method is adapted to analyze magnetic circuits. The result is verified by finite element analysis using ANSYS Emag. Finally, some design parameters are optimized under several constraint conditions. Through this study, the design procedure for a specific electromagnetic actuator is set up using a simple reluctance method.

  • PDF

A Study on the Development of a Hybrid Electromagnetic Actuator Against Microvibration (미진동 저감을 위한 복합형 전자기식 작동기의 개발에 대한 연구)

  • Moon, S.J.;Park, S.H.;Jeong, J.A.;Huh, Y.C.;Kim, C.H.;Choi, S.M.
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.21 no.5
    • /
    • pp.475-483
    • /
    • 2011
  • A hybrid electromagnetic actuator with an air mount is designed so as to achieve the desired isolation reduce the vibration efficiency on the floor vibration. The performance specification of the hybrid electromagnetic actuator is determined based on the vibration criterion for vibration-sensitive equipment. In the design stage of the electromagnetic actuator, the simple reluctance method is adapted to analyze magnetic circuits. The result is verified by finite element analysis using ANSYS Emag. Finally, in order to confirm the design performance, a dynamic characteristic test is carried out for the prototype of a hybrid electromagnetic actuator.

Miniaturization and Optimization of Electromagnetic Actuators for Implantable Hearing Device Based on MEMS Technology (MEMS 기술 기반 이식형 청각 장치용 전자기 엑츄에이터의 소형화 및 최적화)

  • Kim, Min-Kyu;Jung, Yong Sub;Cho, Jin-Ho
    • Journal of Sensor Science and Technology
    • /
    • v.27 no.2
    • /
    • pp.99-104
    • /
    • 2018
  • A micro electromagnetic actuator with high vibration efficiency is proposed for use in an implantable hearing device. The actuator, which can be implanted in the middle ear, consists of membranes based on the stainless steel 304 (SUS-304), and other components. In conventional actuators, in which a thick membrane and a silicone elastomer are used, the size reduction was difficult. In order to miniaturize the size of the actuator, it is necessary to reduce the size of the actuation potion that generates the driving force, resulting in reduction of the electromagnetic force. In this paper, the electromagnetic actuator is further miniaturized by the metal membrane and the vibration amplitude is also optimized. The actuator designed according to the simulation results was fabricated by using micro-electro-mechanical systems (MEMS) technology. In particular, a $20{\mu}m$ thick metal membrane was fabricated using the erosion process, which reduced the length of the actuator by more than $400{\mu}m$. In the experiments, the vibration displacement characteristics of the optimized actuator were above 400 nm within the range of 0.1 to 1 kHz when a current of $1mA_{rms}$ was applied to the coil.

Fabrication and Test of an Electromagnetic Micropump using Solenoid Coil (솔레노이드 코일을 이용한 전자 마이크로 펌프의 제작 및 시험)

  • Kim, Gi-Hun;Kim, Sun-Yeong;Jeong, Ok-Chan;Yang, Sang-Sik
    • The Transactions of the Korean Institute of Electrical Engineers C
    • /
    • v.49 no.5
    • /
    • pp.315-320
    • /
    • 2000
  • This paper presents the fabrication and test of a micropump with an electromagnetic actuator and a pair of aluminum flap valves. The actuator consists of a solenoid coil, a permanent magnet and an actuator diaphragm. The actuator diaphragm is fabricated by the spin coating of silicone rubber. The valve are passive ones and are fabricated by micromachining. The deflection of the fabricated actuator diaphragm is measured with a laser vibrometer. The deflection of the actuator diaphragm is proportional to the input current. The measured deflection of the fabricated diaphragm is $400 \mum$,/TEX> when the input is 118 mApp, and the cut-off frequency is 50 Hz. The maximum flow rate of the fabricated micropump with the electromagnetic actuator is about 5$0 \muell/min$ at 5 Hz when the input current and the duty ratio of the square was are 118 mApp and 50%, respectively.

  • PDF

Design and Analysis of Electromagnetic Tubular Linear Actuator for Higher Performance of Active Accelerate Pedal

  • Lee, Jae-Yong;Kim, Jin-Ho;Lee, Jeh-Won
    • Journal of Magnetics
    • /
    • v.14 no.4
    • /
    • pp.175-180
    • /
    • 2009
  • This paper describes the design and analysis of a tubular linear actuator for intelligent AAP (Active Accelerate Pedal) system. In a driving emergency, the electromagnetic actuator produces an additional pedal force such as the active pedal force and vibration force to release the driver's foot on accelerator pedal. A prior study found that the linear actuator with a ferromagnetic core had a problem in transferring the additional force naturally to a driver due to the cogging force. To reduce the cogging force and obtain higher performance of the AAP system, a coreless tubular linear actuator is suggested. Electromagnetic finite element analysis is executed to analyze and design the coreless tubular actuator, and dynamic analysis is performed to characterize the dynamic performance of the AAP system with the suggested tubular actuator for two types of thrust force.

A Equivalent Finite Element Model of Lamination for Design of Electromagnetic Engine Valve Actuator

  • Kim, Jin-Ho
    • Journal of Magnetics
    • /
    • v.11 no.4
    • /
    • pp.151-155
    • /
    • 2006
  • The electromagnetic engine valve actuator is a key technology to achieve variable valve timing in internal combustion engine and the steel core and clapper of the electromagnetic engine valve actuator are laminated to reduce the eddy current loss. To design and characterize the performance of the electromagnetic engine valve actuator, FE (finite element) analysis is the most effective way, but FE (finite element) 3-D modeling of real lamination needs very fine meshes resulting in countless meshes for modeling and numerous computations. In this paper, the equivalent FE 2-D model of electromagnetic engine valve actuator is introduced and FE analysis is performed using the equivalent FE 2-D model.

Optimal Design of Electromagnetic Actuator with Divided Coil Excitation to Increase Clamping Force

  • Kim, Tae-Woo;Chang, Jung-Hwan
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.3 no.4
    • /
    • pp.446-450
    • /
    • 2014
  • This paper performed the optimal design of electromagnetic linear actuator with divided coil excitation. The table of orthogonal array and response surface methodology (RSM) are applied to maximize the clamping force of the electromagnetic linear actuator with colenoid (COL) and multipolar solenoid (MPS) excitation. The analysis results show that the clamping force of the optimal models with COL and MPS excitation are increased by 41% and 54% at the gap of 0mm compared to the initial models, respectively.

A Study on the Design of Electromagnetic Valve Actuator for VVT Engine

  • Park, Seung-hun;Kim, Dojoong;Byungohk Rhee;Jaisuk Yoo;Lee, Jonghwa
    • Journal of Mechanical Science and Technology
    • /
    • v.17 no.3
    • /
    • pp.357-369
    • /
    • 2003
  • Electromagnetic valve (EMV) actuation system is a new technology for improving fuel efficiency and at the same time reducing omissions in internal combustion engines. It can provide more flexibility in valve event control compared with conventional variable valve actuation devices. The electromagnetic valve actuator must be designed by taking the operating conditions and engine geometry limits of the internal combustion engine into account. To help develop a simple design method, this paper presents a procedure for determine the basic design parameters and dimensions of the actuator from the relations of the valve dynamics, electromagnetic circuit and thermal loading condition based on the lumped method. To verify the accuracy of the lumped method analysis, experimental study is also carried out on a prototype actuator. It is found that there is a relatively good agreement between the experimental data and the results of the proposed design procedure. Through the whole speed range, the actuator maintains proper performances in valve timing and event control.

Control Performance of Hybrid Mount Using Electromagnetic Actuator and PZT Actuator (전자기 작동기와 압전 작동기를 이용한 하이브리드 마운트의 제어성능 평가)

  • Paeng, Yong-Seok;Yook, Ji-Yong;Moon, Seok-Jun;Choi, Seung-Bok
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • /
    • pp.1131-1136
    • /
    • 2007
  • This paper presents an active vibration control of a 1-DOF system using hybrid mount which consists of elastic rubber and PZT(piezostack) actuator and elastic rubber and electromagnetic actuator, respectively After identifying stiffness, damping properties of the elastic rubber, PZT actuator and electromagnetic element, a mathematical model of the hybrid mount is established. The mount model is then incorporated into the 1-DOF system and the governing equation of motion is obtained in a state space. A sliding mode controller is designed in order to actively attenuate the vibration of the system. Control responses such as acceleration and transmitted force of the 1-DOF system are experimentally evaluated and presented in time and frequency domains.

  • PDF

Control Performance of Hybrid Mount Using Electromagnetic Actuator and PZT Actuator (전자기 작동기와 압전 작동기를 이용한 하이브리드 마운트의 제어성능 평가)

  • Paeng, Yong-Seok;Yook, Ji-Yong;Moon, Seok-Jun;Choi, Seung-Bok
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.17 no.7
    • /
    • pp.617-623
    • /
    • 2007
  • This paper presents an active vibration control of a dynamic system using hybrid mount which consists of elastic rubber-piezostack actuator and elastic rubber-electromagnetic actuator, respectively. After identifying stiffness, damping properties of the elastic rubber, PZT actuator and electromagnetic element, a mathematical model of the hybrid mount is established. The mount model is then incorporated into the dynamic system and the governing equation of motion is obtained in a state space. A sliding mode controller is designed in order to actively attenuate the vibration of the system. Control responses such as acceleration and transmitted force of the dynamic system are experimentally evaluated and presented in time and frequency domains.