ecrazyman controller

[fishingpaul]

I have replaced my ezee torq 2 controller,with an ecrazyman 36v 350 watt controller after a few different wiring attempts, including one that gave a very rough start and 50mph with the wheel off the floor but very little pulling power on the road,i eventually arrived at phase wires connected, blue_yelo,yelo_blue, green_green,and hall sensors green_blue,blue_green,yelo_yelo,this now gives 24mph with the wheel off the floor and it now runs very smooth,it is giving about the same no load speed as with the ezee controller when in de restricted mode, but on the road it only goes about the same speed as when the ezee controller was restricted ,running it at 48v gives 31mph no load speed but only seems to get it back to about the same level as the previous derestricted ezee controller performance on the road,is this likely to be the controller being a cheap replacement or do i need to experiment further with the wiring connections.

 

[Russell]

Yeah it seems most people have to reconfigure the ecrazyman controller and often as not they come up with the same combo you did. Also your original eZee controller is not restricted in any way except that it's limited to 20A. The eZee motor is wound for a certain speed, 7.2 RPM/V I believe, and it won't do more than that.

-R

 

[lynchy]

That controller probably hasn't got enough current to drive that motor properly at 48V but is sufficient at 36V. I've got a 250W watt motor that was matched to a controller for 250W nominal at 36V. It is rated to 15A. So in theory it's giving almost 500watts at 36V, but the thing is that a 250W motor will actually pull alot more than that when accelerating or under high load. I would say that you would need at least a 20A or more likely a 25A controller to properly power that motor at 48V.

That same 15A controller current limits when trying to run the 250W 36V motor at 48V, even though it should be able to supply 48V *15A, or 720W at 48V.

What is the max current on the controller?

 

[fishingpaul]

The controller is rated to 25 amps according to the case,i had another play with the phase wires today and other combinations run backwards or not at all,

 

[TPA]

I think amp ratings for ecrazyman are overblown.

36V X 25A = 900W

Not likely.

probably more like 10-15A.

 

[tostino]

I think amp ratings for ecrazyman are overblown.

36V X 25A = 900W

Not likely.

probably more like 10-15A.

I actually find he under rates his controllers wattage, and the amp limit is the actual limit of the controller.

With his 48v600w model, it had an amp limit of 30a. On my old bike I used it on, the CA would read 28a while being current limited, and drop from there as my speed increased. My CA was calibrated correctly.

Same is true for the 50a model I have now. Stock it would pull just about 53a, now after I beefed up the traces, shunt, and re-programmed it, I pull 68a continuous on a hill going 35+.

The watt ratings are really just there for show, and don't do much!