Page 22 Eq. (2.30) should have a right hand side identical to the preceding equation (with an integral sign) and the sentence before (2.30) should be: Thus (2.29) becomes:
Page 36 Fig. 3.2 Second column should have E=V/l
Page 38 should have RFe= 1.5/[(2000)(12.57E-7)(.01)] = 59666 (E3.1.1)
Page 52 should have W=(0.125)2/[2(12.57E-7)(0.1)(0.1)(1)] = 62.2 J (E4.2.2)
This energy of the reluctance method is about 56% lower than the 141.65 J
Pages 119-124 Figs. E7.6.2 and E7.7.2 thru E7.7.4 are now available IN COLOR in the article “Magnetic Nanoparticle Simulation” in ANSYS Advantage Magazine, March 2015, free download at www.ansys.com/magazine .
Page 359 TABLE A.1 entry for conductivity should have L to the -3 power, and entries for permittivity and capacitance should have Q to the +2 power.
Page 362 TABLE B.1 entry for Magnetics Supermendur should have k1=2.448E-5, k2=2.989, k3=11.24
I thank Ashish Deshpande, K. C. Fung, Mark Juds, John Kniepmann, and Mark Solveson for pointing out the corrections above. Feel free to email your comments, corrections, or questions to me at email@example.com .
In March 2015 the ANSYS Advantage magazine (volume IX, issue 1) will contain an article on magnetic nanoparticle force computations written by John R. Brauer. The article contains material excerpted from Chapter 7 of Magnetic Actuators and Sensors, 2nd edition, as well as new enhanced color displays of magnetic fields and forces. The article will appear at www.ansys.com/magazine .
A talk will be given at 5:30 PM on September 17, 2014 by John Brauer. Its title is
MAGNETIC PARTICLE FORCES FOR ACTUATORS, RECYCLING SEPARATORS, AND BIOMEDICAL APPLICATIONS.
Magnetic volume force densities are computed using finite element analysis. Computations on small permeable particles are shown to agree with a classical formula for magnetic separators. Such forces are important for magnetic particle brakes and clutch actuators, and for recycling separators of steel waste. Computations are also made for biomolecular screening using magnetic beads such as those made by GE Healthcare.
This talk is based largely on parts of Chapters 5 and 7 of Dr. Brauer’s book Magnetic Actuators and Sensors, 2nd edition, Wiley IEEE Press, 2014.
The talk is sponsored by the IEEE Magnetics Society Milwaukee Chapter and the IEEE Engineering in Medicine and Biology Society Milwaukee Chapter. It will take place at the Milwaukee School of Engineering, Todd Wehr Auditorium, 1025 N. Broadway, Milwaukee, WI 53202. Admission is free to all, and snacks will be provided.
A tutorial paper will be presented the morning of May 15th at the Electrical Manufacturing and Coil Winding Expo in Milwaukee, WI. Titled “Variations of Coils and Steel for Optimum Design of Magnetic Actuators,” the paper is authored by Mark Solveson and John Brauer. Based on the 2nd edition of Magnetic Actuators and Sensors published in early 2014, the tutorial will last almost an hour. For complete seminars for your staff, contact the author at firstname.lastname@example.org.
Wiley IEEE Press has now published the Second Edition of Magnetic Actuators and Sensors by John R. Brauer, copyright 2014. It is about 25 percent larger than the first edition (2006). Besides many updates and clarifications, it has new sections on topics including:
Mechatronics, analogous circuits, Halbach magnets, magnetic volume forces, magnetic bearings, magnetic separators, saturable magnetic infusion and effusion, encoders, current sensors, GMR spin valve sensors, Chattock coils, SQUID magnetometers, actuator systems for 2D planar motion, actuator design optimization, and digital hydraulic valves.
For more information see http://amazon.com/books or http://wiley.com .
“Magnetic diffusion delays in steel and permanent magnets when coil currents are turned on and off,” has been accepted for the Magnetics 2014 Conference, Orlando, FL, January 29-30, 2014. This new paper is partly based on the 2nd edition of Magnetic Actuators and Sensors by John R. Brauer, to be published by Wiley IEEE Press in late 2013.
I teach an interactive seminar “Magnetic Actuators and Sensors” over the telephone and internet for your company or institution. The seminar can be tailored to your needs but usually consists of four sessions of three hours each. Only a college freshman’s understanding of basic math and physics is needed as a prerequisite. Watch introductory video at:
or download or watch at: http://www.kickyoutube.com/watch?v=VpQ22-B5oz8
Video recorded 2008 June by Susan M. Brauer.
For further information, please email me at:
John R. Brauer, Ph.D., P.E., Life Fellow IEEE
Fish Creek, WI 54212-0402 U.S.A.