ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
F AST-SWITCHING insulated gate bipolar transistor inverters may cause additional bearing currents in inverter-based drive systems. The high-frequency circulating bearing current is one of the different principal contributing phenomena. It occurs in addition to the “classical” bearing current due to magnetic asymmetries of large line-fed motors. The inverterinduced circulating bearing currents follow the same path as the “classical” ones; yet, their origin is very different [1]–[8]. If no additional measures such as the use of filters or chokes that are designed for use in the inverter output are taken, the inverter is a common-mode voltage source that exposes the motor terminals to high dv/dt. This causes an additional high-frequency common-mode current Icom, mainly because of the interaction of the high dv/dt at the motor terminals and the capacitance between motor winding and frame Cwf. The frequencies of these high-frequency common-mode currents range from 100 kHz up to several megahertz [9].