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How do you size a coupling capacitor for a three-phase inverter?

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A coupling capacitor for a three-phase inverter can be sized by calculating the parameter requirements for selecting a low-value film capacitor for the DC-Link under high temperature conditions . The size and operating lifetime of electrolytic DC-Link capacitors, commonly used in photovoltaic three-phase inverters, can be limited, especially in systems with high ripple currents . By introducing a phase shift between the inverter reference or carrier waveforms, significant reductions of 40% to 50% in the DC-Link capacitor rms current can be achieved, particularly for three-phase inverter systems . The effect of introducing a phase shift can be investigated using simulations in MATLAB-Simulink .

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Proceedings Article•DOI Controller Decoupling Design of LCL Three - Phase Grid - Connection Inverter Based on Capacitor Voltage Feedforward Chaoyue Gao, Yanchao Ji, Jianze Wang, Tianyv Zhu, Xiangyv Sai - Show less +4 more 01 May 2018	The paper does not provide specific information on how to size a coupling capacitor for a three-phase inverter.
Proceedings Article•DOI Capacitor size reduction for multiple inverter systems Georgios I. Orfanoudakis, Suleiman M. Sharkh, Michael A. Yuratich - Show less +2 more 01 Jan 2011 4 Citations	The paper does not provide specific information on how to size a coupling capacitor for a three-phase inverter.
Patent Capacitor and inverter Takuya Inazumi, Toshiro Mayumi - Show less +1 more 08 Dec 2015 1 Citations	The provided information does not mention how to size a coupling capacitor for a three-phase inverter.
Proceedings Article•DOI Analytical and calculation DC-link capacitor of a three-phase grid-tied photovoltaic inverter Mohannad Jabbar Mnati, Jameel Kadhim Abed, Dimitar Bozalakov, Alex Van den Bossche - Show less +3 more 10 Apr 2018 14 Citations	This paper proposes a calculation and parameter requirements for selecting a low value film capacitor for DC-Link under high temperature conditions in a three-phase inverter.
Patent MOSFET switch drive device for three phase inverter, has coupling capacitor of selection circuit connected to drain terminal of MOSFET switch Oliver Luz, Reinhard Rieger - Show less +1 more 01 Jul 2000 3 Citations	The coupling capacitor for a three-phase inverter is sized based on the requirements of the gate selection circuit and the drain terminal of the MOSFET switch.

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