EMWorks Newsletter 2020 EMWorks User Conference 2020

FIND US AT

         
 

APEC 2020
New Orleans, LA
Booth #2026

March 15-19, 2020

 

2020 IEEE PES T&D
Chicago, Illinois
Booth #3805

April 20-23, 2020

 

CWIEME BERLIN 2020
Messe Berlin
Booth #12C51

May 26-28, 2020

 

ASEE Annual Conference
Quebec, Canada
Booth #720
June 20-24, 2020

 

APPLICATION NOTE

3D SIMULATION OF AXIAL FIELD PERMANENT MAGNET COUPLING SYSTEM USING EMS AND SOLIDWORKS MOTION COUPLING

Permanent Magnet couplings (or couplers) are used to transmit torque from a primary driver to a secondary follower without any mechanical contact. Many industrial applications are based on such transmission system that doesn`t need any external electrical circuit for motors and propellers. They are especially used for high security applications and in sealed equipment for transmissions through walls.

EMS magnetostatic module is used to predict the field distribution and torque behavior versus geometrical criteria using the parametric study sweep analysis of a magnetic coupling system (Figure 1). This analysis allows to predict the effect of some of those criteria on the magnetic performance of the coupling through the run of different scenarios in a single study by varying both mechanical angle and air gap distance between the rotors.

Figure 1 - 3D design of the Axial flux magnetic coupling and schematic illustration of the alternative magnetization of PM poles.

Figures 2 and 3 display different plot types of the magnetic flux density at various mechanical angles.

Figure 2 - Vector plot of the magnetic flux density at the angles 0 and 15 degrees.

Figure 3 - Fringe plot of the magnetic flux density at the angles 0 and 15 degrees.

Figures 4 and 5 show a comparison of experimental, analytical and EMS results of z-component of the magnetic field in the air gap and the rotor torque, respectively.

 

Figure 4 - Flux density Bz versus radial coordinate

Figure 5 - Torque results versus angular .

EMS couples both electromagnetic fields and mechanical analysis. Using SOLIDWORKS motion and EMS, angular speed and displacement are computed and illustrated in Figure 6a). The oscillations waveform of the rotating torque is shown in Figure 6b).

Figure 6 - a)- Angular speed and displacement versus time b)-Torques results versus time


 

SCIENCE NEWS

People can sense Earth’s magnetic field, brain waves suggest

A new study hints that humans have magnetoreception abilities, similar to some other animals

A new analysis of people’s brain waves when surrounded by different magnetic fields suggests that people have a “sixth sense” for magnetism.

Birds, fish and some other creatures can sense Earth’s magnetic field and use it for navigation (SN: 6/14/14, p. 10). Scientists have long wondered whether humans, too, boast this kind of magnetoreception. Now, by exposing people to an Earth-strength magnetic field pointed in different directions in the lab, researchers from the United States and Japan have discovered distinct brain wave patterns that occur in response to rotating the field in a certain way.


(Image source: VCHAL/SHUTTERSTOCK)