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Low-cost means for estimating and controlling speed of electric watercraft and trolling motors

  • US 6,986,688 B1
  • Filed: 06/03/2004
  • Issued: 01/17/2006
  • Est. Priority Date: 06/06/2003
  • Status: Expired due to Fees
First Claim
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1. A speed estimation system for watercraft comprising:

  • a propulsion system means comprising an electric motor and propeller configured to provide propelling thrust via rotation of the motor and propeller, the propulsion system means further configured to receive electrical power;

    an electronic circuit configured to store the characteristics of the electric motor and the propeller of the said propulsion system means,the electronic circuit further configured to sense at least two independent parameters of the said propulsion system, the electronic circuit configured to determine an estimated watercraft speed based on the sensed parameters and the stored characteristics of the electric motor and the propeller.

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