Note: Design of a novel rotating magnetic field device

Godínez, F. A.; Chávez, O.; Zenit, R.
June 2012
Review of Scientific Instruments;Jun2012, Vol. 83 Issue 6, p066109
Academic Journal
A novel device to produce a rotating magnetic field was designed, constructed, and tested. The system consists of a Helmholtz coil pair which is mechanically coupled to a dc electric motor whose angular velocity is controlled. The coil pair generates a uniform magnetic field; the whole system is rotated maintaining the coils energized using brushes. The magnetic field strength is uniform (≈5.8 mT) for a workspace of about 100 mm along the rotation axis. The system remains free of undesirable high amplitude mechanical vibrations for rotation frequencies below 10 Hz. We verified the performance of the apparatus by conducting experiments with magnetic swimmers.


Related Articles

  • Computer-Aided Design of a Brushless DC Motor with Exterior-Rotor Configuration. Yi-Chang Wu; Bo-Wei Lin // Computer-Aided Design & Applications;2012, Vol. 9 Issue 4, p457 

    The aim of this paper is to evaluate the magnetic field and motor performance of an exterior-rotor brushless DC (BLDC) motor based on two approaches, i.e., the magnetic circuit method and the finite-element analysis (FEA). An equivalent magnetic circuit model is applied to analytically estimate...

  • Design Optimization and Numerical Analysis on the Magnetic Field of an Assisted DC Field Exciting 18-12 Brushless DC Motor. Moradi, Hassan; Afjei, Ebrahim // International Review of Electrical Engineering;Sep/Oct2012, Vol. 7 Issue 5, p5534 

    This paper presents the design optimization and accurate electromagnetic field analysis of an 18-12 there phase Brushless dc motor (BLDCM) by using a two-dimensional Finite-Element analysis. Proposed motor will provide a wide range of air-gap flux control by a dc assisted field winding which is...

  • Brushless DC Motor and Permanent Magnet Synchronous Motor Control: A Feedback-Method Comparison. Torres, Daniel // ECN: Electronic Component News;Nov2009, Vol. 53 Issue 13, p16 

    The article presents a comparison of brushless direct current (DC) motors (BLDC) and permanent magnet synchronous motor (PMSM) controls. It stresses that the controls of PMSM and BLDC are similar because of the same structure and components it bears wherein its magnetic field could produce...

  • Selecting Hall-effect sensors for brushless DC motors. Edberg, Josh // ECN: Electronic Component News;11/15/2012, Vol. 56 Issue 13, p13 

    The article offers tips for choosing a Hall-effect sensor for brushless direct current (DC) (BLDC) motors. It discusses several design characteristics that should be evaluated by BLDC motor manufacturers when selecting the sensor, including sensitivity, repeatability, and...

  • Obtaining the Magnetic Characteristics of 15/10 and 9/6 Salient-Pole Brushless DC Machine: from 3-D FEM Analysis to the Experimental Tests. Moradi, Hassan; Afjei, Ebrahim // International Review of Electrical Engineering;Sep/Oct2012, Vol. 7 Issue 5, p5549 

    This paper describes the magnetic characteristics and comprising results of two 15- 10 and 9-6 salient pole brushless dc machine with concentrated stator winding which does not use a permanent magnet in the rotor. The permanent magnet is replaced with assisted field coil in the rotor. To...

  • Design of Experimental Apparatus for Asynchronous Motor Principle. Yun Shen; Jianbo Cao; Xiuhui Zhu; Xiaojie Lei; Qiuling Ye; Mengjia Yan; Kang Chen; Zhao Gao // Key Engineering Materials;2014, Vol. 620, p341 

    Current domestic and international for the experimental apparatus been associated asynchronous motor design generally used hand horseshoe magnet rotates to drive the rotor rotates, While it is possible to achieve, the apparatus is too simple, and the effect is not in great satisfaction. To...

  • Unbalanced Magnetic Pull Effect on Stiffness Models of Active Magnetic Bearing due to Rotor Eccentricity in Brushless DC Motor Using Finite Element Method. Bangcheng Han; Shiqiang Zheng; Xiquan Liu // Mathematical Problems in Engineering;2013, p1 

    We firstly report on an investigation into the unbalanced magnetic pull (UMP) effect on the static stiffness models of radial active magnetic bearing (RAMB) in brushless DC motor (BDCM) in no-loaded and loaded conditions using the finite element method (FEM). The influences of the UMP on the...

  • Innovative Controlled Drives. Grabner, C. // AIP Conference Proceedings;1/12/2009, Vol. 1089 Issue 1, p144 

    The considered converter-fed permanent magnet motor could alternatively be operated in two basically different states—the vector control mode or alternatively the brushless dc, also known as electronically commutated mode. Several quality aspects concerning the system performance have...

  • Choose the right motor for intermittent duty. Auchstetter, Terry // Design News;6/27/94, Vol. 50 Issue 12, p86 

    Provides a way of optimizing the selection of permanent magnet direct current (DC) motors used in intermittent-load applications. Limitations of the method; Contact information.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics