Consequently, the trend of industrial and traction market for power conversion is to replace electrolytic capacitors with film technology. This trend is generated by many advantages that film technology offers.
• High rms current capabilities up to 1ARMS per µF
• Over voltage withstanding up to 2 times the rated voltage
• Handle voltage reversal
• High peak current capabilities
• No acid inside
• Long lifetime
• No storage problem
However, this replacement won’t be done “microfarad for microfarad”, but for the total function. Indeed, despite the very big improvement of film technology, replacement solution won’t be possible for each application. In order to help the user understand, we will present some concrete figures where film gives major benefits over electrolytic technology.