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Efficient motors and controls for watercraft

  • US 6,659,815 B2
  • Filed: 06/10/2002
  • Issued: 12/09/2003
  • Est. Priority Date: 06/11/2001
  • Status: Expired due to Fees
First Claim
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1. An electronic control for enhancing the efficiency of an electric motor driven electric watercraft propeller drive comprising:

  • a) a motor current measurement signal corresponding to propeller torque;

    b) a motor voltage measurement signal; and

    c) a comparator for monitoring the current and voltage signals, wherein the controller limits voltage to the motor upon sensing an overly high increase in motor current upon increasing motor voltage.

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