Power modules bring efficiency and scalability to EV traction inverters

December 17, 2019 //By Christoph Hammerschmidt
Power modules bring efficiency and scalability to EV traction inverters
ON Semiconductor has developed a new family of power modules for the rapidly growing market of inverters in vehicle powertrains. In addition to excellent electrical and thermal values, the product family is expected to offer particularly good scalability. The first two modules are now available.

The first two devices are, according to the vendor, ideally suited for use in the main traction inverter of all types of electrically-powered vehicles including battery electric vehicles (BEV), plug-in hybrid electric vehicles (PHEV) and full hybrid vehicles (HEV). With the release of these two devices, ON Semi enables two traction inverter design platforms: VE-Trac Dual and VE-Trac Direct .

VE-Trac Dual will be a collection of Dual Side Cool (DSC) half bridge modules that are stackable and scalable within a compact footprint for traction applications. VE-Trac Dual can be a platform solution for traction inverter applications ranging from 80kW to 300kW with minimum mechanical redesign. The first released VE-Trac Dual device is the NVG800A75L4DSC. The module is rated to 750V at 800A making it double the capacity of currently available competing devices. Market-leading thermal performance is achieved through the utilization of highly-effective dual-sided cooling. 

The NVG800A75L4DSC is an AQG-324 qualified module with an embedded smart IGBT that provides a faster reaction time for the integrated over-current and over-temperature protection features and delivers a more robust overall solution. Additional devices within the VE-Trac Dual platform with higher voltages and various current level options will be released over the coming months to allow a wide range of emerging applications to be addressed.

The VE-Trac Direct platform, meanwhile, offers best-in-class performance and benefits, including direct cooling for excellent thermal performance. The first release on this platform is the AQG-324 qualified NVH820S75L4SPB. The device is housed in a six-pack configuration that is widely recognized and adopted by automotive OEMs and systems providers; this will allow multi-sourcing to be achieved with minimal layout changes. Due to become available in multiple power classes, the VE-Trac Direct platform will allow simple and rapid scaling of power for different vehicle platforms and applications.

Both VE-Trac Direct and VE-Trac Dual platforms are able to operate continuously at junction temperatures up to 175ºC, allowing more power to be delivered


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