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基于长电缆PWM逆变器驱动系统的过电压抑制与轴电流缓解的无源滤波器设计新方法

New Passive Filter Design Method for Overvoltage Suppression and Bearing Currents Mitigation in a Long Cable Based PWM Inverter-Fed Motor Drive System

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中文摘要

在高频PWM逆变器驱动系统中,长电缆会导致电机端产生严重的过电压尖峰,加速电机与电缆绝缘老化。本文提出了一种新型无源滤波器设计方法,旨在有效抑制过电压并缓解轴电流,从而提升驱动系统的运行可靠性与使用寿命。

English Abstract

High-frequency pulse width modulation (PWM) in inverter-fed induction motor drive systems is widely used in industrial applications because of their flexible speed control and energy savings. However, high dv /dt PWM pulses induce overvoltage spikes on the motor via long cable. Such phenomenon would cause serious deterioration of the motor and cable. A passive overvoltage suppression technique of ...
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SunView 深度解读

该研究关注PWM逆变器驱动系统中的高频dv/dt效应及长电缆带来的电磁兼容与绝缘可靠性问题。阳光电源在组串式光伏逆变器及风电变流器产品中,同样面临长距离电缆连接带来的电压反射与电磁干扰挑战。该无源滤波器设计方法可为阳光电源优化逆变器输出侧滤波器设计、提升系统电磁兼容性(EMC)及延长电机/电缆使用寿命提供技术参考,特别是在大型地面光伏电站或风电场等长距离传输应用场景中具有一定的工程借鉴意义。