dv/dt滤波器与正弦波滤波器有何区别?电机保护如何选型
dv/dt滤波器(DUR)限制电机端峰值电压,正弦波滤波器(DSR)把PWM波还原为正弦(THD≤5%)。本文对比二者并给出选型建议。
如何为恶劣环境选择合适的配电变压器:5个关键因素
Five key factors for choosing distribution transformers for harsh environments - climate, type, load profile, efficiency standards and supplier support.