408 Crystalyte Hub Motor Kit
$500aud and $110aud for freight = $610aud
The motor comes already laced into a 20" or 26" rim ( other
size rims can be organised if required).
The controller can run on 36volts or 48volts and the controller can draw a
maximum of up to 20amps.
The motor is brushless type with a high efficiency of over 80% at certain
rpm. The motor is gearless type so it gives good top speed.
If using sealed lead acid batteries the motor is not very suitable for hills,
using lithium batteries the motor is very good on hills, the weight reduction
makes a huge difference in how the motor performs on hills.
If going to use sealed lead acid batteries I would suggest a geared motor
is a better choice ( P3 , P4 or P5 motors) if your going to be doing hill
climbing.
If in a 26" rim running on 36volts the top
speed is about 30km/hr.
If
running at 48volts the top speed is
about 40km/hr.
If in a 20" rim at 36volts it will reach about 25km/hr
at 48v it will reach 33km/hr
top speed
(because the motor is gearless its top speed depends on what size rim you put it
in, on a 27" rim also called a 700c rim the top speed will be slightly over
40km/hr if running on 48volts). In a 20" rim the top speed is lower but it
will have more torque or pulling power up hills.
The motors have no internal gearing so they are very quiet ( almost
completely silent) but not really the
best motor for steep hills (if using a 26" rim ).
Its very good for long rides on flat or long
not too steep hills. The motor is quite ok on medium steepness hills if using
lithium batteries. The motor will kick you along with no pedal assist needed at
all on flat roads. In fact its quite alot of fun to be whizzing along at 40km/hr
(48v in 26" rim) without pedalling at all.
The motor weighs just under 8kg and is 19cm in diameter. Crystalyte
motors come with a 6 speed cluster installed on the motor. The motor also comes laced into a wide dual wall aluminium rim with thick spokes
(2.6mm diameter) for extra strength.
Rear wheel motors only are available ( front motors can be organised but I
recommend rear installation is better).
The installation process is reasonably simple for all the crystalyte motors,
does require some technical skill.
The kit includes everything you need excepting the batteries.
Independent Torque Graph of 408 motor running on
48volts.
Maximum stall torque is about 45Nm. Max. output is approx. 570watts ( input
850watts at peak output)
. Maxium efficiency is 83% ( note max efficiency occurs at about 300rpm, at
lower rpm efficencies can be quite low, hence not the best motor if low speed (
low rpm) riding is what you want).
Above 408 installed in my bike with two lots of 24v 10ahr (4kg) lithium cobalt
oxide type batteries in series to
give 48volts 10ahr. Range approx. 30km flat ground no pedal assist, top speed
with no pedalling 40km/hr, power consumption approx 10watthrs per km. (in
picture above one charger is plugged in just to show where it goes). With pedal
assist and being nice to the batteries on flat ground higher distances can be
achieved.
INSTALLATION:
Installation is quite straight forward, there are a few things to note:
1. the spokes will be quite loose when you get the kit. Please adjust them to
your desired tension .
2. ensure that you use the torque arms supplied with the kit, these stop the
axle turning in the frame. (see
link)
Motors can be sent not laced in a rim if you want to reduce freight costs.
Kit Contents:
1. motor laced into rim ( spokes used are 2.6mm dia much thicker than
regular bike spokes)
2. Controller 36v/48v 20amps ( digital controller with infineon chip with regen braking and cruise control)
3. Throttle: twist or thumb type
4. Brake Handles with cut off switches
5. Torque Arms and Torque Washers
Other notes: the motors normally come without
a thread on the left hand side for a disc brake, the reason being it will fit
into a 13.5cm space without problem, if you
want to also have a disc brake then it will require slightly larger space. Side
plates with disc mounting thread can also be supplied if required.
Overvolting: 408 motor can be run up to 72volt 18amp though the motor will get
quite warm/hot if run under load for long periods. It requires a different
controller
than comes with the kit.
Other 400 series motors available: 405 to 4012 ( I keep 408 in stock but need to
order other motors)
Stainless steel spokes are not suitable for use with hub motors as they become
brittle and break over a short time period.
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