NON-INSULATED ON-BOARD CHARGER FOR ELECTRIC AND HYBRID VEHICLES (3122)

Currently, on-board chargers are largely implemented as a two-stage topology consisting of an active front end and a galvanically isolated DC-DC converter. The second stage is used to avoid fault currents that would trigger the residual current device (RCD). This has the disadvantage that the energy flow has to be converted twice using power electronics and in the process

power loss occurs in both stages.

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Jessica Retzlaff

Jessica Retzlaff

Innovationsmanagerin

Details

► Increase in charging and vehicle efficiency ► Increase in the power density of the charger ► Cost reduction through simpler design

This problem can be avoided by combining a 3-level active front end with a special modulation technology. The resulting fault currents are thus reduced to an acceptable level. The technology can be used in both single and three-phase and in the complete operating range of 800V vehicle batteries. By eliminating the second stage, less power loss occurs during the charging process, which has a positive effect on vehicle efficiency, energy costs and carbon footprint.

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