Vertical hall effect sensor and a brushless electric motor having a vertical hall effect sensor
US6542068B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N52/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vertical Hall sensor includes a semiconductor crystal with three or more arm sections that are arranged at a uniform angle distance to each other. A central electrode and external current electrodes are arranged on the surface of the sensor, and a plurality of Hall voltage contacts is arranged therebetween. The semiconductor crystal is thick enough for a current flow to pass between the electrodes in each arm section of the semiconductor crystal, whereby the current flow produces several sensitivities in the Hall sensor corresponding to the number of arm sections with a correspondingly predefined angular dependency for a magnetic field that is directed in a parallel position with respect to the surface. The Hall voltages, which can be produced using one such multi-arm vertical Hall sensor, can be used in a reinforced and direct manner as an output signal for an electric motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.