Tyro65
100 mW
Is it the Cycle Analyst or the controller? I can't figure it out. I know that it is not low voltage because it cuts off even at low speeds when the CA is displaying high voltage.
Two ways to eliminate the CA:Tyro65 said:Is it the Cycle Analyst or the controller?
In this case, the first procedure given is a few seconds and doesnt' require risk of damaging wires when disconnecting or reconnecting, or miswiring things when reconnecting, etc., which are possibilities.AngryBob said:I gotta disagree with your first procedure, Amber.
If you are going to test a component which may, or may not, be functioning correctly, you must not use a method which depends for its accuracy on the component, which is in question, actually functioning correctly.
You disconnect it from the system and test in a way where the functionality, or lack thereof, of the component in question is not part of the equation.
Yes, but so will every other method of testing that doesnt' use the CA.Tyro65 said:I have the CA set to ramp up gently. It's the reason I bought the CA. The motor was starting up with such ferocity that it was wrecking freewheels. If I set it to bypass mode will it also bypass ramping?
AngryBob said:So, you are saying that you are riding along, lose power, then, with no change on the throttle, you do absolutely nothing, and then power comes back on?
----Yes
And, this happens with a pack with no BMS, while a pack WITH a BMS worked?
----Yes.
Was this done only once,
----I've switched battery packs only once and that was this morning, but I need to give it a more thorough test.
and have you carefully checked all wiring connections involved with the battery change, has it happened again, after original battery replaced,
----No, but it should be tested on a much longer ride.
and roughly how often does this problem occur? Once a week, every 5 minutes, somewhere in between?
----With the non-bms pack, mostly every few minutes, but it has lasted for more than 5 minutes.
Having a BMS makes such a problem more likely, rather than less.
----Interesting. That makes me think that I have missed a weak connection.
Does display, if any, go dark?
----The Cycle Analyst stays on.
Does your controller have an on switch, or does it come on when supplied with power, with no user intervention required?
----No switch, except one that I have installed in a power cable.
This problem may not be load related, but many similar ones are, and testing with the wheel in the air is indeed handy but it removes the load, and that factor alone may prevent the problem from occuring and prevent effective diagnostics.
----I'll do a more thorough test on the road.
Follow the power, if display goes dark, then at or previous to controller. If controller requires user intervention to turn on, then after controller. If there are no other indications of loss of power other than no motor, then we are looking at a really simple, but inexpensively made, throttle or wiring, or that complex box with lots of electronics that is inserted between throttle and controller.
The one where you can move a couple cables and completely remove it from the list of possible causes.
He was asking if you had a BMS, becuse if you *did* have a BMS, then the BMS can shutdown for various reasons, which will cause a motor cutout.Tyro65 said:I was using a non-bms pack on the motor (the one that cuts out) which powers my drive train. I switched that pack with a bms pack, the one that drives my front hub motor. I went for a short run this morning and the motor did not cut out. I will test some more tomorrow, but it looks like you likely identified the problem.
It is not connected to your cells, so there is no way for it to do that.Does the CA detect that cells are unbalanced? I'm curious about how that works.