Very impressed with the implementation of the gear reduction on the Bafang wheelbarrow motor vs. Bafang G310 (both hubs use the same 10T motor core)

[ebike4healthandfitness]

Both hubs use the same Bafang 10T motor core but the according to the ebikes.ca motor simulator the 11:1 two stage planetary reduction on the Bafang G310 yields a peak efficiency of 81.9% while the 30:1 two stage internal jackshaft reduction of the Bafang wheelbarrow motor yields a peak efficiency of 87.3%.

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Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...

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This works out to the Bafang G310 making 43% more waste heat for any given amount of battery volts and amps compared to the Bafang wheelbarrow motor despite having almost 1/3 the reduction!

Some pictures of the Bafang wheelbarrow's two stage internal jackshaft reduction:

 

[ebike4healthandfitness]

Assuming the winding on the wheelbarrow motor could be changed from 10T to 5T here is what that would look like (assuming copper fill did not change):

Motor Simulator - Tools

Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...

ebikes.ca

 

[ebike4healthandfitness]

In the previous post I compared a hypothetical 5T winding wheelbarrow motor to a stock 10T winding G310 motor. The results were very impressive IMO.

Now here is the wheelbarrow motor using the factory 7T winding (from the very fast winding G310/G311) compared to the wheelbarrow motor using a hypothetical 3.5T winding:

Motor Simulator - Tools

Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...

ebikes.ca

When I compare either of those windings to the Bafang G62 fat bike motor (which is widely considered to be the most powerful geared hub motor) they both climb much better than the G62 when a steep grade is used. The 3.5T winding Wheelbarrow motor (despite being a much better climber) also cruises at a faster speed while being at a lower temperature compared to the stock winding G62:

Motor Simulator - Tools

Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...

ebikes.ca

Both those feats are pretty amazing when we consider the Bafang G62 weighs a hefty 4.86 kg.

Unfortunately the 3.5T would require a controller with a very high eRPM limit as well as some special means of attaching the magnets to the rotor. The 5T would also need a controller with a higher eRPM limit but the magnets would probably be OK as long as it used the same adhesive as the GRIN version of the G310/G311 fast winding (which comes with a better than stock adhesive).