bike4life
Well-Known Member
take an inverter generator 2000w wish does about 120v - 15 amps....
Then run through a full bridge rectifier of 200v and 40 amps you can buy for like 20 dollars on ebay. Add heat sink though which is free from scrap yard.... P loss = voltage drop of diode x amps drawn, which can be like upwards of 50-60 watts of heat.....
Then run in parrell to rectifier through a 100,000 uf capacitor of rating 100v to smooth out waveform......
Capacitor Size in 1000s of uf = amps x 8.3 (period of sinewave at 60hz in miliseconds) / acceptable voltage drop.
Example 20 amps x 8.3 / 1.5 voltage drop tolerance = around 100,000 uf capacitor for the rectifier....
Then connect leads from rectifier / capacitor to ebike controller....
Now you have 120v - 15 amps DC to run your ebike on......
Problems with this design???
If 120v is too high, you can have a microwave transformer at the beginning to converter the voltage down....
The thing here is that for around 50-70 dollars in parts, you can have a AC to DC converter that can handle 2000watts or whatever you want. And the generator you might already have or need to buy, and then you would have an ebike with unlimited range.... Need a 5,000watt ebike with unlimited power/range. No problem. You "battery" just went from a 500 watt lithium ion to 30kwh / gallon of gasoline energy.
Plus the cops cant yelll at you like with gas bikes..... And you can have an arbitrary top speed or range. Just size up the components or generator instead of worrying about battery range......Like you know you want to do 50mph for 100 miles on your ebike, looks like you would need 10kwh in lithium batteries or you can just go with the hybrid idea. Its dumb to have the gas generator charge the batteries. As no charger cannot charge them faster than you deplete them. When charging my ebike it charges 100watts/ hour, but you are depleting at like 1000 watts/ hr when riding. Instead have an ebike with no batteries, just the rectified power as shown above....
The bridge rectifier below says 1600v, 100 amps. That might be a lie, because thats 160kw, but i am sure it will be able to handle the 2000 watts, at 100 volts 20 amps.....
Then run through a full bridge rectifier of 200v and 40 amps you can buy for like 20 dollars on ebay. Add heat sink though which is free from scrap yard.... P loss = voltage drop of diode x amps drawn, which can be like upwards of 50-60 watts of heat.....
Then run in parrell to rectifier through a 100,000 uf capacitor of rating 100v to smooth out waveform......
Capacitor Size in 1000s of uf = amps x 8.3 (period of sinewave at 60hz in miliseconds) / acceptable voltage drop.
Example 20 amps x 8.3 / 1.5 voltage drop tolerance = around 100,000 uf capacitor for the rectifier....
Then connect leads from rectifier / capacitor to ebike controller....
Now you have 120v - 15 amps DC to run your ebike on......
Problems with this design???
If 120v is too high, you can have a microwave transformer at the beginning to converter the voltage down....
The thing here is that for around 50-70 dollars in parts, you can have a AC to DC converter that can handle 2000watts or whatever you want. And the generator you might already have or need to buy, and then you would have an ebike with unlimited range.... Need a 5,000watt ebike with unlimited power/range. No problem. You "battery" just went from a 500 watt lithium ion to 30kwh / gallon of gasoline energy.
Plus the cops cant yelll at you like with gas bikes..... And you can have an arbitrary top speed or range. Just size up the components or generator instead of worrying about battery range......Like you know you want to do 50mph for 100 miles on your ebike, looks like you would need 10kwh in lithium batteries or you can just go with the hybrid idea. Its dumb to have the gas generator charge the batteries. As no charger cannot charge them faster than you deplete them. When charging my ebike it charges 100watts/ hour, but you are depleting at like 1000 watts/ hr when riding. Instead have an ebike with no batteries, just the rectified power as shown above....
The bridge rectifier below says 1600v, 100 amps. That might be a lie, because thats 160kw, but i am sure it will be able to handle the 2000 watts, at 100 volts 20 amps.....
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