Low-cost means for estimating and controlling speed of electric watercraft and trolling motors
US6986688B1 · kind B1 · utility
32Cited by
3References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Jun 3, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H21/17
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A speed estimation system for watercraft comprising a propulsion unit configured to provide thrust via rotation of a propeller and having an electric motor, a power supply configured to supply electric power to the propulsion unit, and an electronic circuit configured to sense at least one propulsion system parameter from which the propeller torque can be at least implicitly determined, and at least one propulsion system parameter sensed from which the propeller speed can be at least implicitly determined, the electronic circuit configured to determine the watercraft speed based on the sensed parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.