Feb. 7, 2007 (87) PCT Pub. No.: WO2006/002899 PCT Pub. Date: Jan. 12, 2006
(65) Prior Publication Data
US 2008/0272726 Al Nov. 6, 2008
(30) Foreign Application Priority Data
Jun. 30, 2004 (DE) 20 2004 010 211 U
(51) Int. CI.
H02P 7/00 (2006.01)
(52) U.S. CI 318/432; 318/603; 318/607
(58) Field of Classification Search 318/432,
318/434, 800, 798, 603, 604, 607 See application file for complete search history.
U.S. PATENT DOCUMENTS
5/1990 Roussel 318/608
7/1991 Platzer, Jr 359/877
(Continued) FOREIGN PATENT DOCUMENTS 43 15 637 Al 11/1994
Translation of International Publication No. WO 2006/002899, published Jan. 12, 2006.
Primary Examiner—Rina I Duda
(74) Attorney, Agent, or Firm—White & Case LLP
A control apparatus for an adjusting device in a motor vehicle is provided. The apparatus has a sensor, particularly a current sensor (Sj), for generating a signal (U1 to U10, l1 to I3, At1 to At8) which is dependent on a motor movement by a motor in the adjusting device. The apparatus also has a power driver for controlling a motor current, and a processor (RE). The processor is designed and set up (i) to find a position (xm) from the sensor signal (U1 to U10, Ij to I3, At1 to At8), particularly from the ripple in the motor current, (ii) to associate a reference characteristic (Chrej) of orderly signals (U1 to U10, l1 to I3, At1 to At8) from the sensor, particularly forthe ripple, with a reference position (xr(;/), (iii) to correct the position found (xm) on the basis of the reference characteristic (Chrej) and the reference position (nrej), and (iv) to control the motor current on the basis of the corrected position.
20 Claims, 3 Drawing Sheets