Power Quality, UPS, Filters
Technical Lecture Session
Controller and Filter Design for Utility Interface Converters
VFD, PWM, Integrated Differential mode and common mode, Tricore lamination, filter
A dual mode sinewave output filter that eliminates motor problems due to the PWM waveforms in both CM and DM operation is proposed. Three-phase inductor constructed with tricore laminations. CM voltage in this filter design is referring to the switching frequency and sidebands of its integral multiples. The single integrated inductor with the capacitors create a LC low-pass filter in both CM and DM operation. This proposed filter offers a complete solution with reliable, practical and cost-effective to the issues caused by CM voltage in power converter system. 5A, 45A and 160A prototypes were built and test results presented.