Advice needed.

[slow worm]

Hello, I bought a converted carrera with a 350 watt yose rear hub motor recently, it's got the C500 display and a yuishi 18 amp max controller, I've found the advanced settings and turned the max amps up to 18 amps, it does a little over 20 mph on the flat but because I work out in the sticks I decided to add a 250 watt yose front hub motor I have two throttles and use the front hub only for steep hills, it works surprisingly well but me being me wanted a little extra oomph, I've bought a luishi 18 amp max controller but the display julet plug is slightly different, one end has an extra pin, any ideas? I was thinking of upping the max amps to 16 or 17 amps for short bursts, batteries aren't a problem because I'm running 3 with a combined total of 46 ah's.

 

[thelarkbox]

Yikes thats an unusual config. what hills terrain do you cover that needs the 2nd motor??

you can run some controllers headless (without a display) by throttle only by shorting the pins #1 (red wire battery voltage), and #2 (blue wire, 'start') to turn it on. if julet(waterproof) plugs/sockets, the keyword 'pinout' in a search should get you where pin-count starts from..

So you could install a switch to make the above connection on demand and wire up the one throttle to both controllers. Throw the switch to engage/disengage the front motor when you come to the big hill or spot a plod and need to exit stage left pdq.

Personally id pull the 350w motor and run within the regs the 18a controller with a 250w motor only but im boring and like having insurance etc..

edit imho 18a max current setting will have little effect on a 250w motor running on the flat, but if labouring at a slow speed up a long hill over a mile or more could suffer from overheating .