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On the Bike Stand
I owe Louis this report for his kind support in helping me build a bike with electric brake. If you have seen some early threads of mine on this forum, then you know I was looking for a conversion kit that can climb the steep hills and slide down the same hills with confidence. In addition to that, I want a PAS that can make me feel as if I were riding a regular bicycle. So I pedal all the time and do not use a hand throttle (Whether it is a thumb or twist).

Since Louis does not sell the direct drive hub motor, I bought a direct drive motor kit 24V 250W with PAS from California on line. I installed it on the front wheel and my rear wheel uses a Nuvici hub. The front wheel with hub motor is about 20lbs, the rear Nuvici wheel is about 10lbs, the 24V 10AH pack is about 6 lbs. The bike frame is a mountain bike frame with both front and rear suspensions that I bought as a complete bike for 90USD from Target about 6 years ago. The total weight of the bike is about 80lbs. I use tires of 26”x1.9” and I am about 165lbs.

The controller is a standard one and is very powerful compared to my previous electric bikes with 36V. It is so powerful that I feel I am more like riding a moped rather than a bike. The controller takes the signal from my pedaling then exerts so much current (easily gets me and the bike to 20miles/hr) that make my pedal effort insignificant. However, when it comes to climbing the slope, the controller turns out to be weak and exhausting. The emphasis of the controller is on going fast and that is not what I want. And it eventually hurts the travelling distance. It is only about 12 miles.

Now I would like to switch to the Louis’s controller. All I needed to do was to replace the controller and I was lucky there because the connectors for three phase wires and 5-wired hall sensors from the motor use the same kind of connectors as Louis’s controller.
I disconnected the five pin hall sensor from the old controller and plugged it into the new one very smoothly. Well my luck stopped there. When I tried to unplug 3-prong phase wire from the old controller, I had to destroy the connector to get it off because it was glued to the old one.
The next step was to find out the right match for the two pairs of the phase wires. There are only 6 configurations and I tried them all out and found the right one, 3 did not work and 2 rotated backwards. I hanged the bike on the stand during all the testing and twisted the thumb throttle to the extreme to get the maximum speed of the front wheel for the 3-speed switch. The measurements are as follows: L (18 mph), M (28mph), and H (30mph). When I released the throttle, the front wheel came to a stop fairly quickly and it was obvious to me that the electric brake was working as advertized. To be continued......

Der-Ming