【摘要】 研究了电动机分布电容对ＰＷＭ变频调速系统的影响，建立了考虑分布电容的异步电动机数学模型，并进行了仿真和实验验证。电动机分布电容在逆变器元件开关瞬间产生很大的尖峰电流，可造成变频器损坏和电动机转矩下降，这是变频调速系统设计和应用中应重视的问题。更多还原

【Abstract】 The problem of distributed capacitance in PWM -- AC motor system is researched, and the mathematics model of induction motor considering distributed capacitance is established, that is verified by the simulation and the experiment. Because of distributed capacitance, a shock current will be produced in the switching moment of the inverters, it may damage the inverters, or decrease torque of AC motor, this must pay an attention in design and applications of variable frequency speed control system.更多还原