Electronics

Electronics

Distorted Current shape in BLDC Motor excited by external circuit

    • junaed.buet
      Subscriber

      Hello. I am trying to design a 2D FE model of BLDC motor as shown in figure 1. I have excited the windings with an external circuit (figure 2). The switching signals for the voltage controlled switch have been implemented based on back emf curve six commutation points. I am getting a distorted current shape for model depth (stack length) 52.75 mm as shown in figure 3. But a decent current shape for model depth of 53 mm( figure 4). How to resolve the issue for figure 3. Please Help.

    • Navya C
      Ansys Employee

      Hi junaed.buet,

      Reduce the nonlinear residual to a smaller value in the solution setup for the first case and check.

      Regards,

      Navya

    • junaed.buet
      Subscriber

      Thank you Navya. I followed your instructions. However I did not find any change in the current shape. I am attaching the screen shot of current shapes for different  nonlinear residual in the solution setup. Kindly let me know if I have made any mistakes or is there any other way to resolve my problem.

                                                                                Figure 1

                                                                        Figure 2

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