February 12, 20179 yr I see no problem with your suggestion, but as Flec has said before this has not been taken to court.Same with Genny in trailer. If it is charging a battery that is not powering the bike I see no problem.
February 12, 20179 yr Would it make a PHEV ? Convert to an eMTB but with the strimmer motor charging a small battery. He could go for miles and when he arrived he could edge the lawn as well. I see an opening for Gtech ??? Yes. If it was the one battery on the bike, definitely illegal, since current from the generator would be going directly to the motor as well as charging. That makes it a petrol vehicle with electric transmission, another form of hybrid. .
February 12, 20179 yr Yes. If it was the one battery on the bike, definitely illegal, since current from the generator would be going directly to the motor as well as charging. That makes it a petrol vehicle with electric transmission, another form of hybrid. . ... Being deliberately provocative.. It would be relatively easy to make an electronic switch which would disconnect the battery from the motor during the charging cycle and disconnect the generator during the charging cycle. With say a stop time of 5 microseconds between phases and a cycle rate of 1000 per second. Excess charge generated during the motor phase could be stored in a capacitor, so storing energy. It would be fun to test the legality of that!
February 12, 20179 yr ... Being deliberately provocative.. It would be relatively easy to make an electronic switch which would disconnect the battery from the motor during the charging cycle and disconnect the generator during the charging cycle. With say a stop time of 5 microseconds between phases and a cycle rate of 1000 per second. Excess charge generated during the motor phase could be stored in a capacitor, so storing energy. It would be fun to test the legality of that! Superficially that could theoretically be legal, but it's questionable whether such a system could be tested using the EN15194 standard, so might not be able to be approved. More importantly though, given the legal restrictions on our very limited power motors, the drive power downtime could halve the existing power and more than halve the drive experienced. I doubt a future limited to a true 100 watts of drive to the road would be popular with e-bikers. The simpler solution now that high current delivery batteries are much lighter and smaller is two batteries. One on charge from the small generator and one delivering current, the two automatically switching roles at optimum intervals. Since lithium batteries are suited to cyclic charging, this is entirely practical. .
February 12, 20179 yr I should add to my above post that my solution is only in consideration of the electric assist bike regulations. The authorities might well still rule that carrying an operating generator on an electric vehicle brings it within motor vehicle law on the grounds that it comes under exhaust emission regulations. With a small two stroke generator that could be problematic. .
February 12, 20179 yr Superficially that could theoretically be legal, but it's questionable whether such a system could be tested using the EN15194 standard, so might not be able to be approved. More importantly though, given the legal restrictions on our very limited power motors, the drive power downtime could halve the existing power and more than halve the drive experienced. I doubt a future limited to a true 100 watts of drive to the road would be popular with e-bikers. The simpler solution now that high current delivery batteries are much lighter and smaller is two batteries. One on charge from the small generator and one delivering current, the two automatically switching roles at optimum intervals. Since lithium batteries are suited to cyclic charging, this is entirely practical. . ... Still carrying on my argument, there is no particular requirement that the duty cycle be 50% the charging voltage could be much higher as it is average charge to which the battery responds. The motor must be constrained to the 48v to meet the EN standard. The bike would still meet the EN standards as without the potentially third party add on it could be a totally standard e bike. Of course it would be just as easy to have a second battery sitting on the carrier with the small generator.
February 12, 20179 yr ... Still carrying on my argument, there is no particular requirement that the duty cycle be 50% the charging voltage could be much higher as it is average charge to which the battery responds. The motor must be constrained to the 48v to meet the EN standard. True, but the drive would still be detached for a part of the duty cycle, reducing the power available. .
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