NEW GENERATION OF PV INVERTERS WITH ADVANCED POWER ELECTRONICS PACKAGING CONCEPT FOR HIGHEST RELIABILITY AND MINIMUM ASSEMBLY TIME IN MASS PRODUCTION

摘要

For a successful future development both, technical innovations as well as economy-of-scale arenecessary. In this paper Power Electronic Packaging as one important area of technical innovations for PV invertersis introduced. An advanced Power Electronic Packaging concept for PV inverters optimized for mass production andhighest reliability is presented. A comparison with earlier generations of PV inverters in terms of topology, PowerElectronic Packaging concept (electromechanical system integration) and resulting assembly process is shown. Theimpact of these advances in Power Electronic Packaging on failure rates, assembly time and specific price arepresented. Compared to the inverters of the early nineties due to this new Power Electronic Packaging concept thefailure rate could be cut by more than half. Furthermore the assembly times can be reduced by about 70 %. Thespecific costs were reduced by about 60%. The next generation of String inverters with very much improved usabilityis presented. This inverter series incorporates all the lessons learned from previous inverter generations.