What controller do you use with Q75?

[A..dam]

I got S06P (with LCD-5) which has problems interfacing with Q75.
(see https://endless-sphere.com/forums/viewtopic.php?f=2&t=81852)
BMSB list ONLY one more controller compatible with Q75:
36Volts 250Watts LSW-675 Sine Wave Controller with King Meter KM5S LCD Display

Do you know if anybody else (other than BMSB) sells this controller+LCD?

Thanks, A..dam

 

[mountain biker]

i have been eyeing the q75 for a while. i got a front fork which i think this may be my only option. what kind of power your putting through this thing. volts amps watts.... and i think that they has a 13 to 1 ratio...i understand it is 250 watts rated correct? any info you give will be helpful. sorry i don't have controller information but maybe someone more educated on that will chime in.

 

[d8veh]

Any high-speed sensorless controller should work with it. The old KU63 would have been perfect, but I think they changed something so it's not as good now.

You could try this one:
http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2013-CX-G2DJ.24BUM

I just looked at the Aikema website to see what they say about the reduction ratio. They give it as 13.2:1, which would make P1= 211. Yesterday, I pulled out my bike with a Q75 motor and I took it for a ride. It's OK on levels 1 to 3, but loses sync on levels 4 and 5 at low speed when climbing. I'll have a play with it over the weekend to see if I can find a P1 setting that works.

 

[motomech]

I agree w/ Dave on the Elifebike controllers.
Due to the odd Voltage of my Lipo batteries, I can't use the sine wave/ LCD controllers and displays and have been using the ELK controllers for several years. I find them to be simple and sturdy.
With my low power Q100 installs, the 3-speed LED display works well, especially the lower Voltage systems. When one is only trying to cover a limited speed range, say, 15 to 22 Mph, the 3-speed PAS covers it without any major gaps. It's when the systems are more powerful, with a greater speed range, that gaps appear and the "lurching to speed" issues come to the fore. Then the 5-"torque level systems work better.
Another nice thing aboutthe ELK controllers is that they are available on Ebay from the diyebikestore2110 which can save on shipping costs if all you want is a controller.
http://www.ebay.com/itm/24V-36V-350W-6MOSFET-ebike-Electric-Bicycle-Brushless-Motor-Controller-with-LED-/222181208530?var=&hash=item33bb0831d2:m:mgxcwDHTuIgK4sxrLPhfyrQ

 

[d8veh]

The thing that worries me is that the Q100s never worked very well sensorless, even with the old KU63. The Q75 is the same as a Q100, only smaller.

 

[d8veh]

Good news. The Q75 works perfectly with the S06P. I tried P1 = 211, but it was the same as before, then I chose P1 =160 randomly, and that solves the problem on mine. The motor will now stay in sync at full power on level 5 at low speed.