<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span></span></div><div><div><span></span></div><div><div>Hank,</div><div id="AppleMailSignature">tutorial on torque & speed!</div><div id="AppleMailSignature"><a href="http://lancet.mit.edu/motors/motors3.html">http://lancet.mit.edu/motors/motors3.html</a></div><div id="AppleMailSignature">another on understanding gearbox design</div><div id="AppleMailSignature"><a href="http://www.instructables.com/id/Understanding-Motor-and-Gearbox-Design/">http://www.instructables.com/id/Understanding-Motor-and-Gearbox-Design/</a></div><div id="AppleMailSignature">In a nut shell your maximum power is at about half your no load speed.</div><div id="AppleMailSignature">So run the motor with no load & check the rpm of the output shaft with a tachometer, then check the rpm under load to make sure it is around half of the no load rpm.</div><div id="AppleMailSignature">So in your case if the rpm under load was half the no load speed it would be close to the</div><div id="AppleMailSignature">motors rated power.</div><div id="AppleMailSignature">Cheers Alan</div><div id="AppleMailSignature"><br>Sent from my iPad</div><div><br>On 5/10/2017, at 9:24 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Alan,</div><div>If I have a 1\4 hp motor and I have the controller turning the motor at say 50 rpm, is the motor giving me 1\4 hp at 50 rpm?</div><div>Hank</div><div><br></div>
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On Wednesday, October 4, 2017, 1:33:59 PM MDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv6040104928"><div><div>Hi Hank,</div><div id="yiv6040104928AppleMailSignature">yes. If you have your speed controller on full speed there would be no</div><div id="yiv6040104928AppleMailSignature">pulsing of the power to the motor, it would be fully on.</div><div id="yiv6040104928AppleMailSignature">You can have full power & no rpm in a stall situation. Most modern</div><div id="yiv6040104928AppleMailSignature">controllers I have seen have current limiting that you can program in;</div><div id="yiv6040104928AppleMailSignature">so in a stall or overloaded situation it would back off the power.</div><div id="yiv6040104928AppleMailSignature">Alan</div><div id="yiv6040104928AppleMailSignature"><br clear="none"></div><div id="yiv6040104928AppleMailSignature"><br clear="none">Sent from my iPad</div><div class="yiv6040104928yqt3926128260" id="yiv6040104928yqt84648"><div><br clear="none">On 5/10/2017, at 7:56 AM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi All,</div><div>When a dc motor is speed controlled with a PWM controller is the motor at full power regardless of rpm?</div><div>Hank</div></div></div></blockquote></div><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs..org">Personal_Submersibles@psubs.org</a></span><br clear="none"><span><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><div class="yqt3926128260" id="yqt88598">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
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