Allex
100 MW
I was thinking about this one 
[youtube]9R7Jt1dGpCY[/youtube]
[youtube]9R7Jt1dGpCY[/youtube]
E-S Phasor Electric Bike Owners
- Thread starter Rodney64
- Start date
ridethelightning
1 MW
- Joined
- Jul 21, 2013
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hey allex saw that video not sure my bike can do 50 mph have not tried that high of amps but pretty certain I can get to 44 or 45 mph in that time....so 90% of the performance at 25% of the power? I'll take that!....
I think these hub motors simply cannot turn fast enough to absorb the extra electrons so they end up converting energy into heat at high wattages not very efficient
I think these hub motors simply cannot turn fast enough to absorb the extra electrons so they end up converting energy into heat at high wattages not very efficient
Rix
100 TW
korpin said:
With most Ebike hub motors, there is a point of diminishing returns. Start going above 8KW, whatever the thrust gain that is achieved from Peak KW increased via DC amps input yields less results than the thrust increase from DC impute getting to 8KW. Now this is a generalization, but you can see this on the Ebikes.ca simulator, and more importantly, Lukes Live for physics dyno custom wound vented cock-n-balls 3540 showed this as well. With that motor, from 7kw-10kw only yielded a marginal increase in HP and Ft ibs of torque, and from 10kw to 40kw before it caught fire, no increase on the dyno. I imagine with super big hub motors like the Enertrac 602 & 603, along with the Cromotor Mammoth, the diminishing returns would start around 16Kw, but those motor are 40 pounds.
Rick
I also think that high voltage and lower amps are more efficient that lower voltage and high amps....some people say there is no difference in how you get the wattage but I would think squeezing all those amps thru those skinny motor lead wires leads to inefficiencies...but I am most familiar with single phase AC maybe its different for DC three phase?Rix said:
Rix
100 TW
Exaclty correct Korpin, all peak wattage is not the same. For example, a 4080 on a 100v 50amp set up would run way faster top speed than a 50v 100amp set up. But they are both 5000 watt systems. Also, the 100v set up would be more effecient, could yeild up to a 15% increase in thrust over the 50v while having a much higher top speed. Yah the higher voltage setup is more effecient, and I don't know why that is except you can see that on Justins ebike CA simulator. I really should educate myself on electrical theory, maybe learn Ohm's law because I don't have a clue.
Rick
Rick
just paid for my cromotor so I'm one step closer. next is figuring out what controller/display/battery combo. I like what I'm hearing about the adapto but am having a hard time understanding what they need for charging (a lot of server psu talk and 220 wiring going on in that thread, I'm limited to 110v at home and work). Also doesnt help that I cant get a reply from anyone. I'm just looking at a 80-90v ///13-20ah battery so I'd just need the mini-e controller but I cant get a reply from anyone yet.
Allex
100 MW
Cromotor and mini-e is overkill on the motor side =)
You should go with the Max.
Charging is easy, you have two choises.
1. charge as usual with your favorite charger (you have a HPC battery? Use their charger)
2. charge through the controller itself using a regular PSU.
You should go with the Max.
Charging is easy, you have two choises.
1. charge as usual with your favorite charger (you have a HPC battery? Use their charger)
2. charge through the controller itself using a regular PSU.
ridethelightning
1 MW
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- Jul 21, 2013
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- 2,010
wingsuit said:
id be getting the biggest pack i could fit in my phasor if i were you. cromotors have a huge appetite! :lol:
and yes,max-e+ cromotor = dreamteam
+1, id also say mini-e is too small for cro.
Allex
100 MW
You can always buy Mini and then upgrade later on...
ridethelightning
1 MW
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- Jul 21, 2013
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this is true,
but id have thought the max-es would be coming pretty soon by now.
but id have thought the max-es would be coming pretty soon by now.
Haha you guys can never get enough can you? I would have thought 80-90v through a 65a controller would be plenty (mini-e)
This is my first ebike so I'm trying to keep its semi sane.
I also am sticking to safe chemistries (it's a work liability thing that I can't really get around) which means I can't fitmuch more than I'm planning, and so makes the max-e overkill.
This is my first ebike so I'm trying to keep its semi sane.
I also am sticking to safe chemistries (it's a work liability thing that I can't really get around) which means I can't fitmuch more than I'm planning, and so makes the max-e overkill.
Rix said:
well have you ever wondered why those big metal towers carrying electrical transmission lines over hills crackle?...its because they are using insane high voltages like 75,000 volts...if they used regular 120 volts to transmit the same wattages the wires would have to be several feet thick to handle the amps!...I think that's why high voltages work better on these e-bikes with their tiny motor lead wires
which brings me to another point I believe you are using 4300 watts at around 58-74 volts and getting 38 mph top speed....I am using about 2500 watts at 117 peak volts hot off the charger and getting 45 mph.....so why the difference????...I understand higher voltage is more efficient but your extra wattage should make up the difference right?...or do you have more of a torque motor?...
Allex
100 MW
Not really, More voltage=more motor revolutions.
So Rick have faster acceleration but lower top speed and you have higher top speed but it takes more time to get there.
So Rick have faster acceleration but lower top speed and you have higher top speed but it takes more time to get there.
Rix
100 TW
Allex said:
Exactly!
Rodney64
100 kW
Rix said:
Higher voltage equals higher top speed regardless of amps. I recon that korpin would get to his top speed just as quickly as Rick would as be has 25 more volts. Maybe I'm wrong. That motor korpin has sounds like a 6 wind.
Rix
100 TW
Rodney64 said:
Thats what I am thinking Rod, a 6 turn stator wind.
Rix
100 TW
CjCelo, welcome to the thread, just throwing this out there, what kind of riding do you want to do with the Phasor? What kind of speeds and performance are you wanting to achieve. Offroad and road only can be spec'd differently.
Rick
Rick
Rix said:
Thank u your answer, I wanna create fastest Performance ebike for offroad and I find powerfull hub motor tips on some sites, Like a 72V,5kw http://leilicn.en.alibaba.com/produ...&edm_cta=read_msg&edm_time=realtime&edm_ver=e etc..
Rix
100 TW
cjcelo said:
A while back, I put together a component lists for a few Phasor builders which I also sent to a couple of Raptor builders. The criteria for the components was based on strength and keeping cost down. Its not the lightest DH MTB stuff out there, which doesn't matter for ebikes anyway. Also its not super specific and doesn't include components such as what kind of pedals, seat clamp, seat tube and seat to use. I could PM you that list. Let me know.
Rick
Rix
100 TW
cjcelo said:
On its way.
