PCIM Europe is the leading international conference and exhibition for power electronics, renewable energy, intelligent motion and energy management. Christoph Simon, part of the Eco-UV development team at KIT, presented his paper entitled “EMI considerations on MHz inverters” at this year’s event, which was held at Nuremberg in Germany from 16th to 18th May.
The inverter is a critical part of the new electronic lamp ballast technology designed at KIT to supply power to the innovative UV lamps under development. Christoph's paper discussed the impact of very high switching frequencies on the voltage interference generated by the inverter. A model was presented to estimate the differential mode interference voltage which was validated with experimental results. Using the new technology of field-effect transistors based on silicon carbide (SiC-MOSFETs), an inverter with 2.44 MHz switching frequency was demonstrated. The characteristics of this device were discussed; whilst the passive components of the inverter become smaller and less expensive with higher switching frequency, extra effort is required for filtering the interference voltage due to a corresponding increase in its magnitude.
The paper was presented in a poster session during the conference and is also published in the conference proceedings.