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. 30, 2015
Filed:
Nov. 28, 2011
Oliver Schaefer, Gruenberg, DE;
Karl Schepp, Reiskirchen, DE;
Oliver Schaefer, Gruenberg, DE;
Karl Schepp, Reiskirchen, DE;
Bender GmbH & Co. KG, Gruenberg, DE;
Abstract
The invention relates to a method and a device for monitoring the insulation of an ungrounded DC and/or AC voltage network. The method includes the following steps: (a) generating a measurement DC voltage Uthat is connected to a ground on one side for a t; predeterminable measuring time frame t; (b) generating and superposing at least one measurement AC voltage Uconnected to a ground and having a measurement duration twith the measurement DC voltage Ufor forming a total measurement voltage U; (c) feeding the total measurement voltage Uinto the voltage network to be monitored; and (d) determining an insulating resistance Rfrom the measurement DC voltage Uand an insulating impedance Z from the measurement AC voltage U. The devise is configured to carry out the above method. The method and the device are suited in particular for monitoring the insulation in electric and hybrid vehicles.