Denzel d100 vs qs138

[maarkmohamed]

Been looking over two motor options trying to figure out which would best between the denzel d100 and the qs 138 70h. On paper it seems like the denzel motor would be capable of more power, links below what are your thoughts?

http://eastgem.net/D100.html

http://www.cnqsmotor.com/en/article_read/QS%20MOTOR%203000W%20138%2070H%20sprocket%20design%20mid%20drive%20motor%20with%20EM150S%20controller%20max%20speed%20100kph/892.html

 

[DingusMcGee]

maarkmohamed,

I do like the 6 mm threaded bolt hole on the end of the Denzel d100. The QS 3000 has a bigger motor shaft and uses a 20/17 motorcycle sprocket for 428 chain. The QS 3000 weights 1.3kg more than the Denzel d100. Does more weight mean less power?

I do have a QS 3000 138 ...its peak power rate is likely 30Kw. 15Kw is easy on it.


See the post

https://endless-sphere.com/forums/viewtopic.php?f=28&t=110930

With either of these motors you will likely end up with a slightly heavy ebike.

 

[DingusMcGee]

Marrkmohamed,

I now see that you have not said into what kind of a vehicle you plan to mount one of these motors. The QS3000 motor with a 450 amp controller ($900? More than the motor $) will need a battery build capable of this much discharge. The easiest battery combination is 2 sets of 3 12Ah turnigy graphene batteries as they are capable of 20C discharge or 2 x (12x20) = 480 amps. I have these batteries. They work great. No voltage sag during full demand even on a low charge.

With the QS 3000 ebike running 30Kw you will have far more acceleration torque than you can get stopping resistance with the finest bike brakes. Either Hope 4 piston or Hayes 4 piston using 203 mm rotors are inadequate to overpower even somewhat less than a full throttle. Even at 15Kw these brake sets are inadequate. I have thought of making dual rotor-brakes.

When Running a QS 2000 dirt bike at 10Kw (the motor can output 20 Kw) the Hayes 4p dominion brakes mounted with it feel adequate for stopping. At 15000 watts and greater maybe consider a motorcycle mount on a frame with adequate bakes?

The QS 3000 (perhaps at 30Kw) is sold on a scooter that can go zero to 60 mph in less than 4 sec. With this much acceleration used indiscriminately you can very soon create inadequate space zones for drivers in the oncoming lane making left turns to mention only one of the confusions you can create. To avoid a smash up adequate brakes could help save your ass.

 

[maarkmohamed]

Sorry forgot to reply. Actually some things have changed, I was earlier working on a custom dirtbike but it just got sold yesterday. Regardless it's good to know how the motors compare and appreciate your feedback. Currently looking at the ultra bee as possible next bike