As just mentioned, I have now fitted a Sabvoton controller, the 72V 6KW model, It took some time to set up but was worth it!
It is much better than the Greentime 36FET , there is no buzzing from the motor at startup just silent power
. It is so much better with a torque based throttle, no jerking, the predictable power makes it much easier to handle on corners, I would never return to a speed based throttle.
The controller is showing to be far more efficient too, I'm getting around 75Wh/m versus 105Wh/m with the Greentime , I also have regen working now so this will have a positive effect. The motor doesn't get as warm as it did before.
The basic top speed is slightly lower due to the controller being sine wave, around 40mph, but with 40A field weakening enabled in the settings it is going up to 48mph (although this reduces the efficiency). The CA can't seem to read the speed over 45mph, the hall signal must be too distorted, so I added a separate sensor and magnet to the swing arm and rear wheel.
I put the settings I am using into Ctirad's spreadsheet here:
https://docs.google.com/spreadsheet/ccc ... ring#gid=0
The results on my CA after urban riding with steep hills:
I also fitted two of my Kingpan chargers (10A and 5A) into the front of the bike, this enables me to use public charge points and I can charge at 1200W.
They are a little noisy with the fans on, but they work and I can switch each one on independently. Ultimately I would like one of the Elcon PFC chargers at 2500W but they would be a challenge to fit in the available space.
72V Crooza scooter, converted to lifepo4 24AH 24S2P Headway, Lyen 18FET controller, 47mph
72V E-max 110S converted to lifepo4 A123 100AH 24S5P, Sabvoton 72150 controller, 49mph