Brushless & Gearless motor?

[The Maestro]

Hi,

I'm thinking about buying a motor on ebay (from china), it says 'Brushless & Gearless'. Whats the implication of a gearless motor? Does it mean that it won't cope with hills very well or be inefficient?

 

[Mussels]

Gearless, sounds odd but I assume they are talking about a hub motor which appears gearless.
If so it's similar to what Wisper and Ezee use but not like the Panasonic.

 

[flecc]

They can be fairly efficient, the BionX being a well known example, or very powerful but a bit greedy like the Crystalyte motor.

Overall though, they tend to be a bit on the weak side where climbing is concerned, the motor used in the Sparta and Koga bikes being a good example of that deficiency.

The fact that the overwhelming majority of motors are internally geared though that makes them more expensive to make says it all really, the manufacturers only doing that for the clear advantages of internal gearing, foregoing the simplicity of direct drive.

What motor is it you are looking at? Hopefully not the Goldenmotor.
.

 

[flecc]

Gearless, sounds odd but I assume they are talking about a hub motor which appears gearless.
If so it's similar to what Wisper and Ezee use but not like the Panasonic.

Just to clarify the difference, the Suzhou Bafang and similar motors used by eZee and Wisper are internally geared like those on most e-bikes. The internal epicyclic gearing reduces the motor speed of well over 1000 rpm in the main operating range to wheel speeds of around 150 to 220 rpm, depending on wheel size.

Direct Drive motors like the BionX, Crystalyte, Sparta and Goldenmotor run at wheel speed, the wired stator fixed on the spindle and the rotor magnets part of the hub.
.

 

[The Maestro]

What motor is it you are looking at? Hopefully not the Goldenmotor.
.

It doesn't mention a make for the motor. Its a kit but I'm asking him for a price for the motor alone. This is the link:

36V 500W ELECTRIC BICYCLE e-BIKE Engine kit 26" wheel on eBay, also, Bikes, Cycling, Sporting Goods (end time 09-Dec-08 15:03:40 GMT)

I'm looking for a higher rpm rear wheel motor+wheel for my mountain bike.

 

[flecc]

It's certainly high revving enough to give high speeds, but impossible to judge the hill climbing on the scant details, no power curves etc. It will be inferior in that respect to an internally geared 500 watt hub motor like the Wisper's though, and almost certainly less economical.

The same motor is shown as a 48 volt 1000 watt version which would climb well but would eat batteries.
.

 

[gedemeisterdk]

likely the "nine continent" (rebranded)
AmpedBikes.com - High Quality E-Bike Conversion Kits
akku-bike Pedelec Elektrofahrrad Ebike Bausatz

direct drive rear or front hub motor.

remember the legal limit of max. 250 watt, but that depends on the controller...and you