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:
Nov. 23, 2021
Filed:
Feb. 26, 2020
Ebm-papst Mulfingen Gmbh & Co. KG, Mulfingen, DE;
Ralph Wystup, Künzelsau, DE;
Philip Kemmet, Heilbronn, DE;
ebm-papst Mulfingen GmbH & Co. KG, Mulfingen, DE;
Abstract
The present invention relates to a device for ascertaining the temperature TW of a winding of an induction machine designed with a stator and a rotor, comprising at least a first Kalman filter (K) to calculate the temperature and a rotary field control for the vector control of the induction machine with at least one id-current controller, which is designed to impose a high-frequency voltage signal (HF) on the winding voltage in order to obtain from this a winding current with a superimposed high-frequency current component for the winding, which is taken to the Kalman filter (K), the Kalman filter (K) having a high-frequency model of the motor in order to determine from this the high-frequency resistance of the winding and in turn the winding temperature TW by means of a calculation function.