The below post is related to an archived discussion
Dear All,
I am new to COMSOL but have managed to follow the following tutorial for a 2D simulation of a side-drive electrostatic micro motor using the Electrostatics and the Deformed Geometry interfaces: http://slideplayer.com/slide/3245345/
I have obtained similar results as in the tutorial but these results are very different to real functional micro motors. Most notably, the simulated micro motor would not work with an excitation voltage higher than 0.2V versus the 100V needed to drive an actual micro motor with similar dimensions. I have used typical dimensions of documented micro motors. Because of the low excitation voltage, the simulated micro motor provides an inferior torque of 10^-6 pNm (as opposed to the expected 10's or 100's pNm that a real micro motor would provide when driven at 100V).
I wonder if there is a way to simulate this device in a way to obtain closer-to-real results. Or I would like to know why the results are so different. I understand the 2D electrostatic interface takes into account the z-axis height of the device to calculate the capacitance that makes the motor work (and possibly account for some of the fringing field). However, I lack knowledge to explain why the results would be so different between the simulation and the real micro motors.
Your help is much appreciated! Thanks a lot, LR