Mercedes-benz Group Ag

Akin Candir

Urs Boehme

Markus Orner

Matthias Leinfelder

Nathan Troester

Andreas Kruspel

Keith Ren Qiang Ong

An insulation monitor for a high-voltage onboard electrical system of a motor vehicle is provided. A respective Y-capacitor is arranged between the positive potential and the vehicle earth and between the negative potential and the vehicle earth. The insulation monitor has a current or voltage source, a voltmeter for measuring at least one of the potentials, and is configured to apply a negative current by the current source when the potential measured by the voltmeter exceeds a predefined upper value and to apply a positive current by the current source when the potential measured by the voltmeter falls below a predefined lower value. The current thus being limited to a maximum permissible contact current in the case of an insulation fault and it is possible to infer the magnitude of the insulation resistances using the voltage measured by the voltmeter and the recharging current that has been fed in.

Insulation monitor and method for operating same

A component arrangement for an electric high-voltage on-board power supply of a vehicle includes a shared EMC filter, a shared intermediate circuit, a plurality of electrical components, and a shared housing. The shared EMC filter and the shared intermediate circuit are provided for the plurality of electrical components. The plurality of electrical components are disposed in the shared housing together with the shared EMC filter and the shared intermediate circuit. The plurality of electrical components are interconnected in parallel with the shared intermediate circuit and the shared EMC filter and there is otherwise no electrical connection between them.

Component arrangement for an electrical high-voltage on-board power supply of a vehicle

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Filderstadt, Germany

Akin Candir