darwin-t
New Member
I have a tadpole trike I built and added an electric hub kit I bought several years ago. I have no record of that purchase now, so I don't know the brand. I'm pretty sure I bought it on Ebay.
It's a 36V 500W.
I had been using three 12V sealed lead acid batteries wired in series to run it with no problems whatsoever.
This year I bought a 36V 30Ah lithium battery on Amazon that was shipped from China.
I wired it up. I'm sure I wired it correctly. I rode somewhere about 3 blocks and the controller went dead. Turning the power switch on and off didn't help. The battery measured 37.2V
Then I bought a new controller. 36V 500W square wave. I wired it up and rode it around the block a couple of times, everything was fine.
Then I got a SPDT toggle switch to hook up the 3 speeds. Rode it in second (default), released the throttle and switched to low, that worked. Then I released throttle and tried high. Shortly after that, the controller died. Both times, it happened at full throttle. Battery voltage is 37V
The battery's maximum discharge rate is 25 amps. The new controller is rated 25 amps.
Does anyone have any ideas what the problem could be?
Would it be possible to get a 750W controller or do they have to be matched to the motor?
Is there a problem changing between square and sine wave controllers?
I only have two good lead acid batteries now, so it wouldn't be easy to swap back to those.
I'll really appreciate any advice I am given.
It's a 36V 500W.
I had been using three 12V sealed lead acid batteries wired in series to run it with no problems whatsoever.
This year I bought a 36V 30Ah lithium battery on Amazon that was shipped from China.
I wired it up. I'm sure I wired it correctly. I rode somewhere about 3 blocks and the controller went dead. Turning the power switch on and off didn't help. The battery measured 37.2V
Then I bought a new controller. 36V 500W square wave. I wired it up and rode it around the block a couple of times, everything was fine.
Then I got a SPDT toggle switch to hook up the 3 speeds. Rode it in second (default), released the throttle and switched to low, that worked. Then I released throttle and tried high. Shortly after that, the controller died. Both times, it happened at full throttle. Battery voltage is 37V
The battery's maximum discharge rate is 25 amps. The new controller is rated 25 amps.
Does anyone have any ideas what the problem could be?
Would it be possible to get a 750W controller or do they have to be matched to the motor?
Is there a problem changing between square and sine wave controllers?
I only have two good lead acid batteries now, so it wouldn't be easy to swap back to those.
I'll really appreciate any advice I am given.
