Lyen controller stopped working

[cwah]

Thanks muckymits, I'm going to get 1 tester.

Oigoi, the controller is supposed to handle up to 150V and it's a 12 fets one. But I may should limit the current to 40a with a fuse? Maybe this one?
12V DC CAR AUDIO CIRCUIT BREAKER FUSE 40AMP 40 AMP 40A | eBay

 

[muckymits]

Just spotted your voltage and this controllers voltage (sure mine does up to 96V) you wont be able to do a full test with it, but you still can do a full check on your motor and throttle as you dont need the power on. once youve checked those 2 and you battery/supply is ok (always first job) then you can start pointing the finger at the controller.

 

[cwah]

Actually I swapped the controller and the motor was working. And the cycle analyst was able to read the correct voltage.


So the motor and battery are fine. So it can only be the controller problem because everything else was working

 

[hech]

We are really missing D8vey here, dont you think?
- if you measured 1500watts on CA thats only 20amps or so. However those lipos are so powerful you really need that fuse. At 40 amps your putting nearly 3000watts thro the motor-can it handle that kind of power? Cant you limit the current using the CA? If the CA is direct plug in then at least part of the controller is working. Try measuring the voltage of each phase wire.

 

[cwah]

I'm planning to have current limitation of 25-30amps through the CA and an additional fuse limitation of 40amps through fuse.

The motor should be able to handle 2000W peak for short period (only for acceleration) then 500-750W continuous.


Do you know how do I measure each phase wire voltage? I connect the controller to the battery and use the voltmeter + and - to what plug?

 

[banbury frank]

Hi the power phase wires to the motor switch so fast you need a oscilloscope to see the voltage

You have blown up the controller just purchase a NEW one

Frank

 

[neptune]

@cwah. Here is some basic info on using a multimter. A multimeter has 3 basic functions.
1. It can measure current, which is measured in amps, or milliamps [thousandths of an amp] current can be AC or DC , on bike tests it will usually be DC.
2.It can measure voltage [AC volts or DC volts} usually DC volts on a bike.
3. It can measure resistance, measured in Ohms, or Kilohms or Megohms [ 1 kilohm =1000 ohms, 1Megohm= 1,000,000 ohms.
Do not attempt resistance tests on a circuit with power connected, it will kill your multimeter. Before doing any test, check twice that your meter is set to the correct range. For example, to test battery voltage, select a DC volts range that is higher than the expected voltage.Do not attempt to measure motor current with a cheap multimeter, this will exceed the highest range of DC amps on your meter. Especially , never connect your meter across the battery while it is on a current [amps] range. It will probably explode! Hope this helps. Any questions just ask.

 

[muckymits]

Maybe one of us could do a section on basic fault finding and meter use just for the members like cwah. Maybe we need a separate section in the new forum and make it members only?

 

[cwah]

Thanks for the info guys. Thanks Neptune for information about the multimeter. For now I can't really use it on the controller. Except to measure continuity on the MOFSET.

Frank, this controller is NEW!! I'm going to ask Lyen to help me to fix it. It was so expensive I don't want to just throw it away.

 

[Scottyf]

I still think one of the fets have blown. Wires look ok on the board but something must be adrift.
It's still a massive controller for the motor though.

My lyen is half the size of that one and will do up to peaks of 40amp 98v.
Does seem strange that it's gone while at such low current. Unless it's not meant to be run at that voltage?
Possible blown the in line regulator. But nothing on the board looks fried.

 

[neptune]

@cwah. Whilst the information on the multimeter may not help you on this occasion , it is stuff you could learn for future reference. Read the instruction book along with what I sent you , and it will make more sense.One thing I forget to mention . On some meters, when you change functions , you need to plug the test leads into the appropriate sockets on the meter. [Some meters have more than 2 sockets.]

 

[NRG]

The reason for measuring the controller phase wires is to check for a short cct. If a FET fails then it usually fails as a short cct. A high reading or open cct reading is good, measure between each of them in turn to ground or the (-) negative wire input to the controller... then reverse the meter probes and measure them again....

Also measure across the + and - input of the controller, again you're checking for a short cct. No short cct or zero ohm reading is good.

If the controller measures OK but still wont work then return it to Lyen for replacement...

 

[banbury frank]

Hi It cant be the fets shorted out IF the cycle analyst still works on the faulty controller
so the 5Volt rail is working

Also How much did the controller cost

Frank

 

[cwah]

I think I have to return it to lyen for replacement because the controller can still work with the cycle analyst. So no cct.

Frank, the controller cost 199$. Link here: Endless-sphere.com • View topic - 12 FET 84-132V High Voltage Racing Controller - LYEN $199

 

[banbury frank]

Hi I would return to lyen That is not a bad price for what it gives you


Frank

 

[aseb]

Lyen is always very helpful. email him and tell him the story- he hand builds the boards and really knows what he's doing. He'll let you know if it needs to be returned, or may be able to give suggestions of what to check. He also sells a tester like the one mentioned but they won't diagnose down to individual FETs.
My Lyen controller can handle currents up to 65 Amps but this will depend on the voltage it runs.
When you email him ( LYEN@HOTMAIL.COM ) tell him the Voltage, Amps, and what motor you use- some are more difficult to drive.

 

[cwah]

Yeah, just had the diagnostic from Lyen: The FET has burnt.

Probably too much amps or wrong hall/phase sequence.

Have to send back the controller for reparation

 

[NRG]

Yeah, just had the diagnostic from Lyen: The FET has burnt.

Probably too much amps or wrong hall/phase sequence.

Have to send back the controller for reparation

Bad luck, so it was a blown FET. Thats why I wanted you to measure the phase continuity, controllers can be seemingly OK until you open the throttle IE: lights on, the CA appear to work etc. until you open the throttle.

Lyen is a good guy he'll sort you out but I wonder why it blew in the first place...he replaces the FETs with good quality items as part of the upgrade...maybe you where just unlucky and had a weak one in there.

I take it your volta and amps where all OK?