Na-atụgharị mgbaama mmepụta PWM nke moto ka ọ bụrụ ebili mmiri dị larịị nke nwere voltaji mpụta dị ala, na-egbochi mmebi nke mkpuchi ikuku moto.Belata ihe ngosi nke resonance kpatara site na ikesa ikesa na ikesa inductance n'ihi ogologo eriri USB, wepụ moto overvoltage nke dv / dt dị elu kpatara, wepụ mmebi akaghi aka nke moto nke eddy ugbu a na-efu, na nzacha na-ebelata ụda olu. mkpọtụ nke moto.