Eaton has introduced a family of 48-volt DC-DC converters for diesel-powered commercial vehicles that can be used to power accessories such as antilock brakes and lights. Unlike competitive offerings, Eaton’s DC-DC converters are operational in ambient temperatures up to 85 degrees Celsius and boast 97% design efficiency.
Many commercial vehicle manufacturers are transitioning to 48-volt architectures, said Ben Karrer, director, Technology Development, Eaton’s eMobility business, "so having the ability to efficiently convert power from high to low voltage is critical."
Eaton’s DC-DC converter takes power from a 48-volt system and reduces it to 24 volts. The bi-directional unit then further reduces the power to 12 volts for use in low-voltage systems and charges a 12-volt battery that stores power in case of a fault in the main power supply.
Eaton offers a family of DC-DC converters that adhere to Automotive Safety Integrity Level (ASIL) B functional requirements and can be optimized to work seamlessly with a manufacturer’s alternator specifications. The converters can also be tuned for specific duty cycles via advanced digital control architecture, enabling flexible control modes through firmware adaptation.
The DC-DC power converter also features specialized high-power lock box (HPLB) power connectors. The HPLB connectors are designed by Royal Power Solutions, a leading manufacturer of high-precision electrical connectivity components that Eaton acquired earlier this year.
The DC-DC power converter’s HPLB terminals provide superior efficiency and reliability as well as protection against the elements. Additionally, the HPLB terminals are waterproof up to one meter deep and strong enough to withstand high-pressure water spray.
Eaton’s DC-DC converter includes noise reduction and rejection technologies, so the unit is unaffected by and does not interfere with vehicle electronics. Additionally, unlike competitive technologies, the design efficiency of Eaton’s air-cooled DC-DC converters reduces power loss over a wide operating range, while the innovative die-cast design features a fin pattern that delivers optimal thermal performance.
Commercial vehicle 48-volt architectures also create the potential for the mild hybridization of drive systems. Additionally, the higher power systems can be used to power electrified heaters to quickly heat a vehicle’s aftertreatment catalyst to help reduce emissions.