<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1461102598597_3204"><span id="yui_3_16_0_ym19_1_1461102598597_3203">Hi Alec,</span></div><div id="yui_3_16_0_ym19_1_1461102598597_3288" dir="ltr"><span>that one says brushless?</span></div><div id="yui_3_16_0_ym19_1_1461102598597_3245" dir="ltr"><span id="yui_3_16_0_ym19_1_1461102598597_3251">On the Kelly faq page for selecting controllers it suggests.....</span></div><span id="yui_3_16_0_ym19_1_1461102598597_3254"><h2 id="yui_3_16_0_ym19_1_1461102598597_3257" style="font: 17px/25px Oswald, sans-serif; margin: 1px 1px 3px; padding: 0px 0px 10px; color: rgb(64, 64, 64); text-transform: uppercase; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; widows: 1; font-size-adjust: none; font-stretch: normal; background-image: none; -webkit-text-stroke-width: 0px;">HOW TO CHOOSE A SUITABLE CONTROLLER FOR THE MOTOR?</h2><div id="yui_3_16_0_ym19_1_1461102598597_3258" style='font: 14px/normal "PT Sans", sans-serif; margin: 0px; padding: 0px; color: rgb(64, 64, 64); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; widows: 1; font-size-adjust: none; font-stretch: normal; -webkit-text-stroke-width: 0px;'><div id="yui_3_16_0_ym19_1_1461102598597_3259" style="margin: 0px 0px 10px; padding: 0px;">Usually the performance will be optimized if the power of the controller is 2.0-3.0 times of the motor's.</div></div></span><div id="yui_3_16_0_ym19_1_1461102598597_3260" dir="ltr"> I guess that means if you have a 2000W motor you get a controller whose continual</div><div id="yui_3_16_0_ym19_1_1461102598597_3287" dir="ltr">amp rating X max voltage is at least 4000W.</div><div id="yui_3_16_0_ym19_1_1461102598597_3286" dir="ltr"> I have heard that it is better to aire on the safe side as some manufacturers over rate</div><div id="yui_3_16_0_ym19_1_1461102598597_3334" dir="ltr">their controllers. Kelly have a reputation of being good & cheap, & their ratings accurate,</div><div id="yui_3_16_0_ym19_1_1461102598597_3365" dir="ltr">however Hugh has had problems with them & I wired up mine yesterday & the ON light</div><div id="yui_3_16_0_ym19_1_1461102598597_3364" dir="ltr">isn't working when powered up. I put power on it once without the pre-ignition resister</div><div id="yui_3_16_0_ym19_1_1461102598597_3390" dir="ltr">so this may have stuffed it, but surely it wouldn't be so fickle!</div><div id="yui_3_16_0_ym19_1_1461102598597_3423" dir="ltr">Alan</div><div id="yui_3_16_0_ym19_1_1461102598597_3391" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1461102598597_3244"><span></span><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1461102598597_3243"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1461102598597_3239" style="display: block;"> <div id="yui_3_16_0_ym19_1_1461102598597_3238" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1461102598597_3237" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1461102598597_3242" dir="ltr"> <font id="yui_3_16_0_ym19_1_1461102598597_3241" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Alec Smyth via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, April 20, 2016 9:45 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] Speed controllers<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1461102598597_3236"><br><div id="yiv2053085266"><div id="yui_3_16_0_ym19_1_1461102598597_3235" dir="ltr"><div id="yui_3_16_0_ym19_1_1461102598597_3240">Hi all,</div><div><br></div><div id="yui_3_16_0_ym19_1_1461102598597_3234">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:</div><div><br></div><div><a href="http://www.roboteq.com/index.php/docman/motor-controllers-documents-and-files/documentation/datasheets/hbl23xx/59-hbl23xx-datasheet/file" target="_blank" rel="nofollow">http://www.roboteq.com/index.php/docman/motor-controllers-documents-and-files/documentation/datasheets/hbl23xx/59-hbl23xx-datasheet/file</a></div><div><br></div><div>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).</div><div><br></div><div>Anyone have any suggestions for other cost-effective controllers to consider?</div><div><br></div><div><br></div><div>Thanks,</div><div><br>Alec</div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>