无刷直流电机转速电流双闭环仿真。逆变器、电机模型都是自建的，仿真精度较高。输出相电流为标准的方形波-The model is a speed-current dual-loop based simulation of BLDC. The inverter and the motor model are all built myself with high simulation accuracy. The output phase current of the motor is a standard square wave.