Trolling motor with integral sonar transducer
First Claim
1. A trolling motor comprisinga submerged motor housing;
- a sonar transducer housed in said motor housing, said transducer having a transducer output; and
an electrical cable connected to said transducer output comprising;
a pair of conductors connected to said transducer output, said pair of conductors twisted about each other;
an inner conductive shield surrounding said pair of conductors;
a dielectric jacket surrounding said inner conductive shield; and
an outer conductive shield surrounding said jacket.
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Accused Products
Abstract
A trolling motor having an integral sonar transducer including: a submerged motor housing; an electric motor housed in the housing; a sonar transducer housed in the housing; a motor controller having a pulse width modulated output and a shielded electrical cable connecting the sonar transducer to a sonar device. Noise from all sources (i.e., electrical noise from ground loops, radio frequency interference, and magnetic interference) is suppressed in the output signal of the transducer through a number of techniques. The electrical cable includes an outer shield connected to the chassis ground of the trolling motor; an inner shield connected to the circuit ground of the sonar device; and a pair of signal carrying conductors comprising a twisted pair. In addition, the resonant frequency of the transducer is selected such that it is not a harmonic of the operating frequency of the pulse width modulated output of the motor controller.
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Citations
4 Claims
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1. A trolling motor comprising
a submerged motor housing; -
a sonar transducer housed in said motor housing, said transducer having a transducer output; and
an electrical cable connected to said transducer output comprising;
a pair of conductors connected to said transducer output, said pair of conductors twisted about each other;
an inner conductive shield surrounding said pair of conductors;
a dielectric jacket surrounding said inner conductive shield; and
an outer conductive shield surrounding said jacket. - View Dependent Claims (2, 3)
a motor housed in said motor housing; and
a motor controller having a pulse width modulated output to provide electrical power to said motor, wherein said sonar transducer has a resonant frequency, and said pulse width modulated output operates at an output frequency, and wherein said resonant frequency is not a harmonic of said output frequency.
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3. The trolling motor of claim 2 wherein said sonar transducer will exhibit a low impedance at a shunting frequency and wherein said shunting frequency is a harmonic of said output frequency.
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4. A trolling motor comprising:
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a submerged motor housing;
a motor housed in said motor housing;
a sonar transducer housed in said motor housing, and having a transducer output said transducer having a resonant frequency;
an electrical cable connected to said transducer output, wherein said cable includes an inner conductive shield surrounding a twisted pair of conductors, a dielectric jacket surrounding said inner conductive shield, and an outer conductive shield surrounding said dielectric jacket anda motor controller having a pulse width modulated output to provide electrical power to said motor, said output operating at an operating frequency, wherein said resonant frequency is not a harmonic of said operating frequency.
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Specification