Rate of rotation measurement using back-EMFS associated with windings of a brushless DC motor
US6084398A · kind A · utility
4Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1998 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Jul 27, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/182
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is integrated and multiplied by the back-emf associated with an adjacent winding. The multiplied outputs associated with each winding are combined to produce a directionally sensitive DC output proportional only to the rate of rotation of the motor's shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.