The current issue of Circuit Cellar has this article on a DIY inverter that is about $6000 US less then commercial units. The link may go away when the next issue comes out but Microchip should have it online somewhere.
Circuit Cellar
Issue #217 August 2008
Subcategory Winner - Microchip 2007 Design Contest
INTELLIGENT ENERGY SOLUTIONS
Electric Vehicle Inverter Design
Circuit Cellar
Issue #217 August 2008
Subcategory Winner - Microchip 2007 Design Contest
INTELLIGENT ENERGY SOLUTIONS
Electric Vehicle Inverter Design
Any technically minded person should be able to complete this project for around $2,500.
Our inverter was constructed with a control board and software based on Microchip Technology’s MC-1 development board and three dual-IGBT modules with gate driver boards from Powerex. We used these development tools to build a basic 100-kW three-phase inverter in an open-source process, which can be continually improved on.
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