48v inverter auxiliary power supply

What is a 48 volt power supply?

Infineon stands for the introduction of the 48 V power supply and already offers an extensive application and product portfolio for 48 V solutions in electric and mild hybrid cars. Traditionally, battery electric vehicles (BEVs) have been equipped with a high-voltage (HV) power supply and a 12 V power supply.

Which inverter is best for a 48v battery?

In the 48V case, transistors and drivers that can handle at least 100V on the power nodes are a good choice. In a mild hybrid application, realizing the most efficient use of battery power is one of the keys to meeting miles-per-gallon (mpg) and CO2 emission targets. An efficient inverter starts with transistor selection.

What is a 48 volt LV DC-DC converter?

48-volt-LV DC-DC converter modules provide power flow between the 48-volt (medium voltage) and 12-volt (low voltage) power nets on mild hybrids (MHEV). The end-user does not notice these modules, but they provide essential functionality, as MHEVs do not have a traditional 12-volt power net alternator; instead, they have a 48-volt starter generator.

What does a 48v battery do?

Here, a 48V lithium-ion battery assists the combustion engine to propel the car; stores recuperated energy; and powers ancillary loads such as pumps, fans, heaters and compressors. These ancillary loads, which may have been previously driven by belts or hydraulics, are now electrified (e-loads). But how do you power e-loads off of a 48V battery?

How to reduce output voltage ripple in a 12v-48v automotive system?

12V-48V automotive systems connect a battery to the DC-DC converter output, which helps in reducing output voltage ripple. L-C filter is placed on the 48-V side to further mitigate output voltage ripple in boost mode. Another way of reducing output voltage ripple is spreading power over more interleaved phases.

How does MHEV 48V work?

Among the primary electronic units in the MHEV 48 V system are a three−phase inverter to operate the starter/generator which charges the 48V battery and the DC−DC converter that ties the 12V and 48V power nets together. DC-DC converter can be designed either as unidirectional or bidirectional, where unidirectional function (Step-down) is mandatory.