This page contains a Flash digital edition of a book.
REACTION SPHERES | ARTICLE


<< Figure 4: Taking figure 3 and adding the effects of


the energised coils adds the current density in the coils (additional arrow plots). >>


verify the expected forces (figure 4) and then compare them to forces seen in a test bench (figure 5). The model has proven to be a powerful predictor for the forces because the computed values are in good agreement with the measurements. In a later step we want to add thermal analysis to find out what happens to the stator when the sphere is rotating and also add the LiveLink for MATLAB module so we can design the controller electronics.


Our simulations with current were set up with the rotor orientation matching that on the test bench (figure 5). The vertical force is computed by integrating the Lorentz force on each of the 20 coils and summing them up to obtain the net force.


<< Figure 5:


Test bench for the reaction sphere. >>


32 | commercial micro manufacturing international Vol 7 No.2


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52