Offset compensation method and system of hall sensor in motor
US9927495B2 · kind B2 · utility
2Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Oct 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An offset compensation method and system of a hall sensor in a motor are provided. The system and method prevent a detection error regarding the position of the rotor of the motor and more accurately measure the speed and location of a rotor by storing the position of when output values of three hall sensors while slowly rotating the rotor by adding control mode for applying a low speed rotating magnetic field to a controller, extracting and storing offsets between each hall sensor and the U-phase position of a stator winding, and then excluding the influence of the offset of a rotor magnet in normal operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.