[PSUBS-MAILIST] Speed controllers

Wed Apr 20 09:08:54 EDT 2016

Thanks Cliff,
I was a bit wary as in my search for BLDC ESCs a lot of their options said "reverse"
but were only a programable function that enabled you to change
from forward to reverse without having to disconnect the wires. 
You couldn't actually flick a switch on your transmitter & reverse
the motor. BTW it says 0-2V on page 26.
Cheers Alan

Sent from my iPad

> On 20/04/2016, at 11:06 pm, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Reversing is fully integrated.  See page 27 of users manual at http://downloads.ionmc.com/docs/roboclaw_user_manual.pdf  for analog control.  0v signal gives full speed one direction, 5v gives full speed in opposite direction and 2.5v is off. 
> 
> Cliff
> 
> 
> Cliff Redus
> 
>> On Apr 19, 2016, at 10:38 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Cliff / Alec,
>> I couldn't see anything about a reverse function on the USB RoboClaw 2x60A HV Brushed DC motor controller.
>> It may be a bit of work making up the reversing circuit & integrating it with the controller if
>> it doesn't have that function.
>> Alan 
>> 
>> 
>> From: via Personal_Submersibles <personal_submersibles at psubs.org>
>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
>> Sent: Wednesday, April 20, 2016 2:51 PM
>> Subject: Re: [PSUBS-MAILIST] Speed controllers
>> 
>> At Robotshop.com, the USB RoboClaw 2x60A HV Brushed DC motor controller would work just as well.  Each board would control two of the MK101s independently.  Has a lot of flexibility on input signal.  If you are using PLC, send it a 0-5vdc analog signal.  
>> 
>> 
>> Cliff 
>> 
>>> On Apr 19, 2016, at 9:24 PM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Thanks Cliff. Is the controller a component you pulled from inside the MK trolling motor or is it a standalone product? I did a few searches and have not turned up anything standalone. I do have such a unit (really old) but it's for a way lower-powered motor than the 101s.
>>> 
>>> Best,
>>> 
>>> Alec 
>>> 
>>> On Tue, Apr 19, 2016 at 9:58 PM, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> Alan/Alec, I use Minn Kota 36v controllers for each of my 4 thrusters.  They have worked great.  They are potted and rugged.  They have an internal relay with a dead band around 2.5v signal voltage.  This means that absolutely no current flows even if you left the motor controller powered up while in the garage.
>>> 
>>> My previous motor controller for my big traction motor was from Curtis.  This worked great but generated a high pitch noise that was irritating.
>>> 
>>> 
>>> Cliff Redus
>>> 
>>>> On Apr 19, 2016, at 6:35 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> What did Cliff use?
>>>> He has been through this process recently with a 101.
>>>> Alan
>>>> 
>>>> 
>>>> From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
>>>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
>>>> Sent: Wednesday, April 20, 2016 11:12 AM
>>>> Subject: Re: [PSUBS-MAILIST] Speed controllers
>>>> 
>>>> No, the one I was considering was not for brushless motors. It's the Roboteq XDC2460, rated for 80A continuous duty per channel. But now I'm looking at Kelly I really like what I'm seeing there too, and Curtis seems to be similar. This will probably come down to a decision between a more advanced  dual channel from Roboteq or a super simple single-channel controllers from the likes of Curtis/Kelly. In general if the simpler one can do the job, it's the one I would prefer even if it cost the same.
>>>> 
>>>> Thanks guys for all the input!
>>>> 
>>>> Alec
>>>> 
>>>> On Tue, Apr 19, 2016 at 6:09 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> Hi Alec,
>>>> that one says brushless?
>>>> On the Kelly faq page for selecting controllers it suggests.....
>>>> HOW TO CHOOSE A SUITABLE CONTROLLER FOR THE MOTOR?
>>>> Usually the performance will be optimized if the power of the controller is 2.0-3.0 times of the motor's.
>>>>    I guess that means if you have a 2000W motor you get a controller whose continual
>>>> amp rating X max voltage is at least 4000W.
>>>>    I have heard that it is better to aire on the safe side as some manufacturers over rate
>>>> their controllers. Kelly have a reputation of being good & cheap, & their ratings accurate,
>>>> however Hugh has had problems with them & I wired up mine yesterday & the ON light
>>>> isn't working when powered up. I put power on it once without the pre-ignition resister
>>>> so this may have stuffed it, but surely it wouldn't be so fickle!
>>>> Alan
>>>> 
>>>> 
>>>> 
>>>> 
>>>> From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
>>>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
>>>> Sent: Wednesday, April 20, 2016 9:45 AM
>>>> Subject: [PSUBS-MAILIST] Speed controllers
>>>> 
>>>> Hi all,
>>>> 
>>>> I need to finalize my selection of speed controllers for Shackleton over the next week or so, and at first blush am looking at this one from Roboteq:
>>>> 
>>>> http://www.roboteq.com/index.php/docman/motor-controllers-documents-and-files/documentation/datasheets/hbl23xx/59-hbl23xx-datasheet/file
>>>> 
>>>> There will be two of them, each driving a pair of MK101 thrusters. Roboteq offers a controller family that is a step down from this and still handles the required amperage, and which is tempting because it's much less expensive. However, the specs are too close for comfort (50A continuous duty rating vs. MK101 requirement of 46A).
>>>> 
>>>> Anyone have any suggestions for other cost-effective controllers to consider?
>>>> 
>>>> 
>>>> Thanks,
>>>> 
>>>> Alec
>>>> 
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