The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2026
Filed:
May. 14, 2024
Hella Gmbh & Co. Kgaa, Lippstadt, DE;
Alan W. Brown, Canton, MI (US);
Martin Dierkes, Lippstadt, DE;
Christian Buhlheller, Lippstadt, DE;
André Körner, Lippstadt, DE;
Christoph Wostmann, Lippstadt, DE;
HELLA GMBH & CO. KGAA, Lippstadt, DE;
Abstract
A leakage current compensator (LCC) circuit is provided. The LCC circuit includes a first residual current coil, a second residual current coil, and a current injector. The first residual current coil functions as an open loop measurement coil, while the second residual current coil functions as a closed loop measurement coil. Between these two residual current coils, the current injector injects a compensation current into a PE conductor. The open loop measurement coil measures any leakage current produced by the grid-connected device, while the closed loop measurement coil measures the actual leakage current remaining after compensation. The current injector allows the LCC circuit to actively cancel the leakage current by, first, injecting what is measured by the open loop measurement coil and, second, injecting an additional current as determined by a closed loop gain from the closed loop measurement coil.