Robert Boschgmbh

Miguel Casares

Thomas Wizemann

Patrick Wenzler

A method, an apparatus, and an electric system for diagnosing a device () for determining the temperature of a component () of an electric unit () are provided. In a first step (), a first temperature gradient (TG) of the component () is ascertained. A second temperature gradient (TG) is determined using the device () for determining the temperature of a component (). In a second step (), a difference between the first and the second temperature gradient (TG, TG) is ascertained.

Method and apparatus for diagnosing a device for determining the temperature of a component of an electric unit

An inverter and a method for operating the inverter. In one instance, a pulse-controlled inverter comprises multiple phase systems. Each of the phase systems has an outer conductor and at least one semiconductor component, and a temperature monitoring device that has multiple temperature sensors which sense the temperature of at least one part of at least one of the phase systems. In said method, a temperature gradient is determined from each of the sensed temperatures, the difference of the determined temperature gradients from an estimated gradient value is ascertained, and if the difference exceeds a threshold value, a fault of the inverter is identified.

Method for the operation of an inverter, and inverter

The invention relates to a method for operating an inverter (), in particular a pulse-controlled inverter, comprising multiple phase systems (), each of which has an outer conductor () and at least one semiconductor component (), and a temperature monitoring device () that has multiple temperature sensors () which sense the temperature of at least one part of at least one of the phase systems (). In said method, a temperature gradient is determined from each of the sensed temperatures, the difference of the determined temperature gradients from each other is ascertained, and if the difference exceeds at least one threshold value, a fault of a cooling device of the inverter () is identified. The invention further relates to an inverter ().

An electrical protection device for bus systems, in particular having a two-wire design, including a bus-control unit and at least one device connected to a bus, the protection device being arranged in a central location on the bus and connected thereto.

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Kornwestheim, Germany

Miguel Casares