| US 9,810,551 B2 | ||
| On-axis magnetic field angle sensors, systems and method | ||
| Udo Ausserlechner, Villach (AT) | ||
| Assigned to Infineon Technologies AG, Neubiberg (DE) | ||
| Filed by Infineon Technologies AG, Neubiberg (DE) | ||
| Filed on Feb. 8, 2016, as Appl. No. 15/18,349. | ||
| Application 15/018,349 is a continuation of application No. 14/083,639, filed on Nov. 19, 2013, granted, now 9,267,781. | ||
| Prior Publication US 2016/0216133 A1, Jul. 28, 2016 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G01B 7/30 (2006.01); G01R 33/07 (2006.01); G01R 33/09 (2006.01); G01D 5/14 (2006.01); G01B 7/00 (2006.01); G01D 5/12 (2006.01); G01D 5/20 (2006.01) | ||
| CPC G01D 5/142 (2013.01) [G01B 7/003 (2013.01); G01B 7/30 (2013.01); G01D 5/12 (2013.01); G01D 5/147 (2013.01); G01D 5/20 (2013.01)] | 26 Claims |
| 1. A magnetic field angle sensor system comprising:
a shaft rotatable around a rotation axis;
a soft magnetic end portion rotatable with the shaft and being rotationally asymmetric with respect to the rotation axis;
a magnetic field source magnetizing the soft magnetic end portion;
one or more magnetic field sensor elements configured to detect a magnetic field caused by the magnetized end portion; and
circuitry coupled to the one or more magnetic field sensor elements and configured to estimate a rotational position of the
shaft by combining signals of the one or more magnetic field sensor elements, and estimate a transient angle error and adjust
the estimated rotational position of the shaft based on the estimated transient angle error.
|