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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Make your own Generator
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<blockquote data-quote="timetraveller" data-source="post: 108419" data-attributes="member: 456"><p>If your die grinder is the same as mine then there will not be enough torque to keep the revs up once the system starts to take significant power. What would work, and would not cost too much, is to buy two aluminium pulleys designed to take a toothed belt and a suitable toothed belt. The larger of the two could be mounted on a shaft held in a powerful cordless drill and the smaller of the two would go onto the input shaft of the electric motor. I would be looking for a speed ratio of about 3:1 so that 2,000 rpm on the drill would rotate the motor at 6,000 rpm. Suitable pulleys and belts are available quite cheaply from engineering supply companies. The electric motor could be held in a vice and the drill by hand as the belt will allow some misalignment or the whole lot could be made more secure with wood and some clamps. Depends upon what you have available.</p><p> Note that I have mentioned a figure of 6,000 rpm for the electric motor. With the Walkernators the alternator runs at about double the engine speed, on a twin, and if you look at most cars there is a large ratio increase in speed between the engine and the alternator. I believe that this is to ensure that there is adequate charge at low speeds. My fear is that the present experiments with relatively small motors and no significant gearing up of the speed will fail to produce what is wanted but good luck to those who are trying. I might be wrong.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 108419, member: 456"] If your die grinder is the same as mine then there will not be enough torque to keep the revs up once the system starts to take significant power. What would work, and would not cost too much, is to buy two aluminium pulleys designed to take a toothed belt and a suitable toothed belt. The larger of the two could be mounted on a shaft held in a powerful cordless drill and the smaller of the two would go onto the input shaft of the electric motor. I would be looking for a speed ratio of about 3:1 so that 2,000 rpm on the drill would rotate the motor at 6,000 rpm. Suitable pulleys and belts are available quite cheaply from engineering supply companies. The electric motor could be held in a vice and the drill by hand as the belt will allow some misalignment or the whole lot could be made more secure with wood and some clamps. Depends upon what you have available. Note that I have mentioned a figure of 6,000 rpm for the electric motor. With the Walkernators the alternator runs at about double the engine speed, on a twin, and if you look at most cars there is a large ratio increase in speed between the engine and the alternator. I believe that this is to ensure that there is adequate charge at low speeds. My fear is that the present experiments with relatively small motors and no significant gearing up of the speed will fail to produce what is wanted but good luck to those who are trying. I might be wrong. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Make your own Generator
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