Hello everybody, I have two questions related to the Torque calculation in a microengine that I presented in this forum some 10 days ago and that David Meeker helped with. I include his file for those interested. First question: I have been informed that our microengine will have AC current. I guess it will be 50 Hz frecuency. Are the calculation that I made valid? Should I change sometthing? Second question: The current density that David chosed was, by some kind ofmagic, very appropiate for our microengine: we are looking for a torque of0.0020 N*m per unit meter lenght, and with the 10 MA/m^2 current density that David chosed, we obtained a 0.0015 N*m per unit meter lenght torque. Quite close. However I am confused about the calculation of the intensity that will go through the coils. Is the intensity just the product of the current density by the area I have modeled in the FEMM program? This will be 10 MA/m^2 multiplied by 0.263873 mm^2 == 2.64 Amperes, which seems to be a lot. Am I missing something, perhaps the number of coils? For instance, if thenumber of coils is 20, the intensity would be 0.132 Amperes? I have been told that this is a much more reasonable value of intensity for our micro engine. I am mantaining the same geometric configuration Thank you very much in advance. Iñaki Garmendia <<mag03a.zip>>
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Description: mag03a.zip