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MX Dirstbike conversion to E Commuter.

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Frank:

--- Quote from: cart_man on January 18, 2018, 06:35:35 PM ---Well I can get the 20KW motor but it seems to only be capable of 5k RPM where the 15KW can go up to 6K RPM.
Also you can spike the 15KW motor up to about 39KW or soo if I am not mistaken. For a little while of course.

The reason I mention the RPM is because if I want my top speed to be more then surely I want more RPM right?

Its just that the 20KW motor will be much more expensive and will weigh more of course.
Here are the stats.

20KW - Motor
Voltage 72 - 120 VDC
Rated Power : 20-25KW
Peak power: 50KW
Speed : 3200-5000RPM
Rated Torque : 80Nm
Peak Torque : 160Nm
Efficiency: >90%
Dimensions: 30x30x25cm   <-   HUGE
Weight: 39kgs
Liquid cooling.


10KW motor

Voltage:48V/72V/96V/120V
Rated Power:8KW-20KW
Efficeincy: 91%
Phase Resistance (Milliohm): 3.1/48V; 6.0/72V; 18.0/120V
Phase Induction(100KHZ): 34uH/48V; 77uH/72V; 252uH/120v
Speed: 2000-6000rpm (customizable)
Weight:17Kg(air),17.7kg(water); Casing: Aluminium
Length (height): 170mm Diameter: 206mm
Keyway size: 6.4mm(W) x 45mm(L) x 21.7mm(D:25.4mm)

so the 20 KW seems to be roughly x2 that of every property of the 10KW soo if you times the 10KW with 1.5 you would probably get that in the ball park ... hopefully.

On second thought ... how hard is it to build your own 3Phase brushless DC Motor? A 20KW one.
Should maybe just build it into a rim?
That would actually be very unbalanced though!

--- End quote ---
Peak power is often a function of cooling.  Even though it's not stated for the smaller motor, maybe it will do the job.

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