Seg Automotive Germany Gmbh

Vivek Tailor

Nima Saadat

Murugaperumal Devaraja

Timm Lohmann

Kaveh Haghverdi

An overvoltage protection circuit for an electric machine has a series connection of at least two overvoltage protection units, each having a switching unit connected in parallel. Each overvoltage protection unit includes at least one overvoltage protection component that limits a voltage, dropping across this component, to a component voltage limit. At least one of the overvoltage protection units includes at least two overvoltage protection components. A voltage tap is provided between two of overvoltage protection components. A method of checking the overvoltage protection circuit includes detecting a voltage present at the overvoltage protection circuit, switching the switching units into different switching configurations and determining a measured value of a voltage present at the voltage tap in each of the switching configurations, comparing the measured values in each case to an associated comparative value, and determining the functionality of the overvoltage protection circuit based on comparison result.

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Stuttgart, Germany

Vivek Tailor