[PSUBS-MAILIST] Speed controllers

Wed Apr 20 05:04:37 EDT 2016

I mentioned earlier that I wired up my Kelly Controller & no lightscame on. This was because although I had connected up the + & -battery terminals there was another wire I thought was only for activatingthe coil on a switch & as I wasn't using a solenoid switch I didn't connectit. However it powered up the electronics in the controller.So Kelly good, me bad. They responded to my SOS really quickly.Alan

      From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, April 20, 2016 11:32 AM
 Subject: Re: [PSUBS-MAILIST] Speed controllers

Alec,the XDC2460 does not advertise itself as suitable for traction vehicles.I know we aren't technically a traction vehicle, but it may indicate that the controllermight not be suitable for rugged applications. I do like the radio control inputoption on it but with a bit of thought you could implement this on a Kelly controller.I have destroyed a few controllers in my playing round :( . The controller is morelikely to fail than the motor & if you had a dual motor controller then possibly you would have 2 motors down instead of one if it failed. Cheers 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 continualamp 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 ratetheir 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 lightisn't working when powered up. I put power on it once without the pre-ignition resisterso 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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