Bender Gmbh & Co Kg

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Vancom Gmbh & Co. Kg

Wolfgang Hofheinz

Harald Sellner

Daniel Spesser

Tim Pfizenmaier

Eckhard Broeckmann

Winfried Moell

Stefan Endres

Dietmar Bytzek

Michael Kammer

Christoph Sessler

Frank Mehling

Stefan Zeltner

Florian Habel

Matthias Oehler

Dennis Haub

Michael Guenther Zeyen

Guenter Uhl

Juergen Hetzler

A method and a device for impedance monitoring for a single-phase or multiphase, ungrounded power supply system. The method comprising the following steps: measuring a complex impedance against ground simultaneously for each active conductor using a measuring device; calculating a complex touch current for each active conductor; testing in the computing unit whether the corresponding complex touch current exceeds a settable body-current threshold value; generating a switch signal in the computing unit upon the body-current threshold value being exceeded; and controlling a switch element using the switch signal for shutting off or isolating the power source.

Method and device for impedance monitoring for protection against electric shock

A method for controlling a charging apparatus of a vehicle, in particular an electric or hybrid vehicle, wherein the charging apparatus has a charging device including a protection and monitoring device. The vehicle includes a high-voltage on-board power system and an electrical energy storage apparatus connected to the high-voltage on-board power system. The method includes electrically connecting the high-voltage on-board power system to charging connections of an energy supply system by the charging apparatus. The charging connections include a neutral conductor, a protective conductor and at least one phase conductor. A protective conductor resistance is detected between the neutral conductor and the protective conductor by feeding in a test current by the protection and monitoring device. A frequency of the test current is filtered out of the compensation frequency range on a narrowband basis.

Method for controlling a charging device of a vehicle and charging device of a vehicle for charging an electrical energy storage device of the vehicle

A monitoring device and a method safeguards the function of a type A residual current device (RCD) in a power supply system. The monitoring device includes a measuring current transformer circuit for detecting a DC fault current (I), an evaluation unit for processing the current detected by the measuring current transformer circuit, and a communication interface connected to the output of evaluation unit. In one embodiment, the monitoring device forms part of an electrical protection device with a type A residual current device (RCD) for ensuring the function of the type A residual current device (RCD).

Electrical monitoring device and method for safeguarding the protective function of a type A residual current device (RCD)

The invention relates to a method and an electrical protection and monitoring device with an insulation monitoring instrument and a differential current monitoring instrument in an electric vehicle for safe driving operation and also for safe charging and energy recovery operation of the electric vehicle at a charging station. The invention further relates to a device for the safe charging and energy recovery operation of an electric vehicle at a charging station with electrical protection and monitoring devices.

Devices and methods for the safe driving, charging and energy recovery operation of an electric vehicle

The invention relates to a method and an apparatus for determining an actual insulation resistance Rin IT systems grounded with a functional grounding resistance R, comprising constant insulation monitoring. In one embodiment of the invention, the functional grounding resistance Ris determined during the initial inspection of the IT system, determining a total insulation resistance Ris carried out during the constant insulation monitoring, and the actual insulation resistance Ris determined during the operation of the IT system from the functional grounding resistance Rand the total insulation resistance R.

Method and apparatus for determining an insulation resistance in a grounded isole terre system

The invention relates to an insulation monitoring device (IMD) in a non-grounded electrical DC grid (DC-IT System), particularly an electrical photovoltaic system (PV). Said device has a power supply unit (B), which is supplied with electrical energy from the electrical DC grid (DC-IT System). According to the invention a rechargeable energy store (C) is present, in particular a capacitor with a charging diode (D) connected upstream. This is supplied with electrical energy (U) via the electrical DC grid and supplies the power supply unit (B) in the event of a temporary failure of the electrical DC grid, so that continued operation of the insulation monitoring device (IMD) is possible until the non-grounded electrical DC grid is re-established. Advantageously, for continued operation of the insulation monitoring in the event of failure of the electrical DC grid the power supply unit (B) provides a preferably pulsed measurement voltage (U), which is used in order to feed electrical energy into the electrical DC grid (DC-IT) via a coupling circuit (AS).

Device for monitoring the insulation of a non-grounded electrical DC grid, particularly a photovoltaic system, and system comprising such a device

The invention relates to a power charging device () for an electric vehicle () with an electric energy store (). The power charging device () comprises at least one rectifier means () for converting a supply voltage () into a charging d.c. voltage (), a contacting means () for contacting a plug-in connection supply point () of the electric vehicle (), and a residual current monitoring device () for detecting a current difference in the contacting means () and/or the electric vehicle () during a charging process of the energy store () of the electric vehicle (). The invention is characterized in that the residual current monitoring device () is designed at least for detection of a direct current difference &#x394;I and comprises a cutoff element () which can interrupt the charging process when a predeterminable direct current cutoff difference () is exceeded over a predeterminable cutoff time.

Power charging device for an electric vehicle

Growing community of inventors

Gruenberg, Germany

Wolfgang Hofheinz