The synergistic effects of the permanent magnet brushless motors with its soft-geared controller overcome the serious disadvantages of traditional motors. A New patented technology takes the advantages of computer control engineering technology and Zero Commutation theory, to achieve zero current gear shift for the EV/LEV applications.  

The new revolutionary technology enables motor efficiently to operate in startup mode, acceleration and on the flat road because the overall speed range of the motor can be extended by switching the stator current to flow through one or more segments of the stator winding, thereby dynamically adjusting the number of "active" turns of the stator winding. It has a higher torque at low speeds, providing good starting and climbing performance for a vehicle fitted with this motor. The motor can operate efficiently at moderate and high speeds, and can be controlled using a simple control system, thereby enabling simplified operation of the electric vehicle fitted with this motor. The following lists its advantages:

§          Simplified power-train system structure

§          Stable, smooth and high reliability

§          Significantly reduce torque fluctuations

§          More efficient material usage and high power output

§          Makes LEV easy to operate and control

§          The straight potential simplifies battery rectification and filtration

§          Makes it easy to control and restrain the operational behavior of LEV/EV

§          Solve the critical heat issue produced in high torque output

Application Study: Technical specs 

3-wheel EVs are a future dream.  I have seen so many try year after year, and other than the Xebra, none are really appearing long term.  This appeared: http://www.trihybridstealth.com/index.html   with no specific specs.- but comparing tires on their human powered model, and the tires on the Stealth do not seem to be similar.  Things like 90 mph may be stretching reality!  This is supposed to be a Tennessee builder.  

I wish them the best of luck.  

Introduction to an Advanced Electric Motor Technology

Introduction to an Advanced Electric Motor Technology

Technical specification data

48V 500W Brushless Motor for LEV Applications ( Electric Motorcycle /Scooter/Golf Buggy)

No. Parameter Specification for the motor
1 Motor Output Power (W) 500W
2 Efficiency ≥82%
3 Maximum Speed (km/hr) 42
4 Wheel  Diameter (inch) 10
5 RIM Diameter (mm) 172mm
6 Width 195mm
7 motor weight (kg) 9-10kg
8 Weight carrying capacity (kg) 250
9 Range/ Charge -Mileage Max 50km @ 70kg
10 Battery Voltage (V) 48v
11 Battery type Lead-acid
12 Battery Ampere-hour (Ah) 20ah
13 Max Torque 110 n.m
14 Climb 25-30 degree @ 75kg

Hub Motors have the advantage 

q      Hub motors easily fit on existing frames and platforms.

q      Hub motors use a space that is otherwise not used at all.

q      This applies to almost all LEVs.

q      There seems to be a nearly universal intuitive acceptance of hub motors by consumers.

Many designs of LEV/EV applications use conventional motor configurations.  Heat dissipation and durability are major issues – also noise, cost and serviceability.