Efficient and Compact 50kW Gen2 SiC Device Based PV String Inverter

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 7Language: englishTyp: PDF

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Mookken, John (Cree Inc., USA)
Agrawal, Binod (Cree India Pvt., India)
Liu, Jimmy (Cree Asia-Pacific Ltd., Hong Kong)

Using newly available Gen2 family of Silicon Carbide (SiC) power MOSFET devices, it is possible to develop a highly efficient and compact 50kW grid tied solar inverter. The efficient new devices allowed the designers to develop a high power to weight ratio 1kW/kg for an air-cooled 50kW 3-ph photovoltaic (PV) inverter with an MPPT boost function. The 50 kW interleaved boost circuit used was only 7 kg, and peak efficiency of 99.4% while switching at 75 kHz. Besides being more efficient, the new SiC based inverter can be less than half the weight and size of state of the art commercial 50kW systems available today.