Lust Antriebstechnik Gmbh

Jan Thorsten Weber

Ludger Hebing

Juergen Kunze

Gunter Schepp

Thomas Kammer

J&uuml;rgen Kunze

Andreas Buente

Magnetic field gradients are used e.g., for potential-free current measurement without voluminous ferrite cores to minimize the influence of homogenous external interference fields on the measurement. So far, they have been provided mainly through U-shaped primary current conductors. The aim is to make it unnecessary to guide high currents through U-shaped current conductors, and to provide a device and a method for creating one or more magnetic field gradients through a straight conductor. To this end, a primary current conductor which is straight at the point where the magnetic field is measured has a recess or groove or slot for creating a magnetic field gradient. Inside or in the area surrounding this recess, the field lines take a course that enables one or more gradiometers to be positioned so that the influences of especially homogenous interference fields on the measurements are successfully minimized using simple mathematical methods such as subtraction.

Device and method for creating one or more magnetic field gradients through a straight conductor

A method and device for measuring electric currents in n conductors (n&gE;2), the measurement of the currents being carried out with (n&minus;1) magnetoresistive sensors. Reliable excess current and/or fault current protection is obtained.

Method and device for measuring the difference in magnetic field strength with magnetoresistive sensors

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Heuchelheim, Germany

Jan Thorsten Weber