| Author |
Message |
Tony Mayzes (Perdu)
Member
Username: Perdu
Post Number: 1
Registered: 3-2009
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| Posted on Saturday, March 14, 2009 - 1:02 pm: |
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Hi
I have a Twinstar with two Brushless Motors CF2812
http://www.himodel.com/electric/HiModel_1500KV_Outrunner_Brushless_Motors_Type_C F2812.html
Two RC smart (generic controller from China) esc with a hard low voltage cutoff (3v per cell) and bec using 2100mah 11.1v Lipo.
When the LVC cuts, one motor stops but the other motor will increase.
Would your LipoShield intelligent lithium cutoff solve this problem?
best regards
Tony Mayzes |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 1003
Registered: 10-2004
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| Posted on Saturday, March 14, 2009 - 5:48 pm: |
|
Tony, That is the purpose of the Liposhield. Are you using V-tail mixing in your transmitter? |
Tony Mayzes (Perdu)
Member
Username: Perdu
Post Number: 2
Registered: 3-2009
|
| Posted on Sunday, March 15, 2009 - 11:25 am: |
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Hi
My transmitter can use V-tail mixing but I'm not using it, I'm using a Y connection from the receiver and the ESC's and I had cut the red wire from one of the ESC.
I was worried about the liposhield because my ESC's LVC cuts at the same voltage (3v) from the liposhield, which cut first the ESC's or liposhield?
Tony |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 1006
Registered: 10-2004
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| Posted on Monday, March 16, 2009 - 7:52 pm: |
|
Tony, just to clarify, are your LVC's built into the ESC's? You are also running both ESC's from the same receiver signal via a 'Y' lead so both should behave the same. The only thing I can think of is one ESC will shut down first due to tolerance in the LVC's, this will reduce the load on the battery preventing the other from shutting down, in fact it speeds up as the battery terminal voltage rises slightly.
Putting an external LVC before the 'Y' lead will shut down both. Can you disable the on-board LVC to prevent conflict? |
Tony Mayzes (Perdu)
Member
Username: Perdu
Post Number: 3
Registered: 3-2009
|
| Posted on Monday, March 16, 2009 - 8:42 pm: |
|
Hi
Yes, the LVC's built into the ESC and not adjustable and I can't disable the LVC. have you stock a external, adjustable LVC? May be CellShield Lithium Cutoff set to 3.5v
Tony |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 1012
Registered: 10-2004
|
| Posted on Thursday, March 19, 2009 - 7:03 am: |
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Tony,
Have you read the data sheet for part number 1072-051 as that looks like a better solution as its cut off voltage is adjustable up to 3.5V? |
