Kone Head / Ed V. Grey Motor

last updated:11 May 2002

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Konehead/Ed V. Grey Motor

This motor uses pulsed repulsive magnets to produce motor action. Electricity is passed to the rotor winding by carbon brushes. There are two batteries driving this motor. One pulses when the rotor is vertical and the other pulses when horizontal. The back EMF from one set of windings is recycled to the other battery making this motor very efficient to run.

This is the back side showing the magnetic timing circuit. The wooden dics in the center contains 2 bar magnets with the (north?) poles face out. There are two sets of (Radio Shack) reed switches per vertical magnets and two for horizontal. Each pair is connected in series (effectivly a logical and gate.) This allows me to vary the phase and dutey cycle of each of the sets of magnets while the motor is running.

This is a close up view of the timing circuit. A single screw in the back of each timing arm allows them to be swiveled independently. The wires from the reed switch in the end pass down though the center of the arm and out the back.

This is a closeup of the rotor and brushes. The rotor is based on Kone Heads design. The brush assembly can be seen against the wooden support in back.

This is a closeup of the FET driving one set of magnets. The FET is NTE2396, but I have also used NTE2377. The FET is mounted to a (Radio Shack) heat sink. The yellow and black leads are connected to a 9V batter throught the timing circuit (read switches). Of course the red and black leads represent the power switching path.

This picture demonstratres a method to measure the output power of the motor. The torque is measured by measuring the force on the balance. By knowing the weight of the mass that is hanging, the weight of the mass on the scales and the diameter of the pulley one can calculate the torque. Remember Power = Torque * Angular Velocity = Force * Distance/Time... etc.

This picture demonstrates the duty cycle of the motor from the signal of the timing circuit.

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Unless otherwise noted, all materials at this site (including without limitation all text, html markup, graphics, and graphic elements) are copyrighted ), 2002 by Reginald L. Jaynes. The material available through this site may be freely used for attributed noncommercial educational purposes only. We ask that due credit and notification be given the author.  

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