Closed-Double-Magnetic Circuit for a Long-Stroke Horizontal Electromagnetic Vibration Exciter
- 18 October 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 49 (8), 4865-4872
- https://doi.org/10.1109/tmag.2012.2225109
Abstract
A novel closed-double-magnetic circuit (CDMC) was presented to achieve high and uniform magnetic flux density (MFD) in the long air gap (LAG) of a long-stroke horizontal electromagnetic vibration exciter. First, the normal single-magnetic circuit (SMC) and the proposed CDMC were modeled by lumped element circuit using equivalent circuit principle, analyzed theoretically by the Kirchhoff's law and the superposition theorem. The comparison between the two circuits shows that the CDMC can have more intensive and more uniform MFD in the LAG. To strengthen the uniformity of the MFD in the LAG, the improved CDMC with uneven air gap and its design method were proposed theoretically. Thereafter, the uneven air gap structure expressed as a three-line-segment form was presented and its optimization was also conducted based on a finite element model referring to a prototype of a one-meter-stroke horizontal electromagnetic vibration excite. Then, the magnetic flux leakage of the magnetic circuits and the influence of slits in the outer magnetic yoke for practical application was also analyzed with the finite element method (FEM). The simulation demonstrates that the CDMC with optimal air gap can further improve the uniformity of the MFD in the LAG. In addition, it is also indicated that the CDMC has less flux leakage than the SMC and the influence of slits can be negligible. Finally, the experiment on the prototype also verifies the effectiveness of proposed CDMC with optimal air gap.Keywords
This publication has 15 references indexed in Scilit:
- Dynamic Analysis of Circuit Breaker With Oil Dashpot Using Multimesh Modification MethodIEEE Transactions on Magnetics, 2011
- Optimization of Voice Coil Motor to Enhance Dynamic Response Based on an Improved Magnetic Equivalent Circuit ModelIEEE Transactions on Magnetics, 2011
- A Miniaturized Electromagnetic Generator With Planar Coils and Its Energy Harvest CircuitIEEE Transactions on Magnetics, 2009
- An Improved Magnetic Equivalent Circuit Model for Iron-Core Linear Permanent-Magnet Synchronous MotorsIEEE Transactions on Magnetics, 2009
- Analytical Modeling of Open-Circuit Air-Gap Field Distributions in Multisegment and Multilayer Interior Permanent-Magnet MachinesIEEE Transactions on Magnetics, 2009
- Magnetic Equivalent Circuit Simulations of Electrical Machines for Design PurposesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Design of a Permanent Magnetic Circuit With Air Gap in a Magnetic RefrigeratorIEEE Transactions on Magnetics, 2004
- Analytical Method for Predicting the Air-Gap Flux of Interior-Type Permanent-Magnet MachinesIEEE Transactions on Magnetics, 2004
- Improved analytical model for predicting the magnetic field distribution in brushless permanent-magnet machinesIEEE Transactions on Magnetics, 2002
- Shape optimization of solenoid actuator using the finite element method and numerical optimization techniqueIEEE Transactions on Magnetics, 1997