<div dir="ltr">On 21 July 2013 18:33, Johny Radio <span dir="ltr"><<a href="mailto:johnyradio@gmail.com" target="_blank">johnyradio@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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On 7/21/2013 6:20 PM, Henner Zeller wrote:
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<div dir="ltr">are the motors identical ? If so, then the motor
probaly generates a voltage in a similar order of magnitude
(minus the losses).</div>
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yes. what are the losses?</div></blockquote><div><br></div><div>If they're identical, then this should be in the same order of magnitude. To know exactly: Measure it :)</div><div>This heavily depends on the motors. You really need to measure the voltage at the output of your generator motor to know where to start.</div>
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<div bgcolor="#FFFFFF" text="#000000">>>If you voltage
is _way_ to high (which I suspect is happening here), then
you can blow the input stage</div>
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if the input stage op amp blows from over-voltage on the input,
would the power amp chip still be protected?</div></blockquote><div><br></div><div>Maybe :)</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000066">
<div class="im"><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">If the motor doesn't work anymore,
something blew inside. </div>
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that much i figured out. <br><div class="im">
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<div class="gmail_quote">Maybe one winding is gone ? Or there
are overvoltage protection diodes that fried. Or some
mechanical failure in the commutator. 60000 RPM is pretty
high.
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6,000, not 60,000</div></blockquote><div><br></div><div>Uh, you said thousands per second. 1000/sec translates into 60000 rounds per minute.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div> If it looks like a sine with one side folded
over to the top (so more like camel humps), then it is the
commutated output (so: a DC motor).</div>
<div>If you can operate the motor with DC, it is a
DC motor.</div>
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def a DC motor, but not seeing a rectified sine on the scope. Seeing
two super-imposed sines on the scope, which seems impossible.</div></blockquote><div><br></div><div>... or the scope doesn't trigger.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000066"> But if
the motor is outputting ten's of volts, then maybe i'm overdriving
the scope, and it's readings are inaccurate. <br></div></blockquote><div><br></div><div>Scopes often can do 10s of volts if you have the right range. If it was overdriving, you'd see a clipping.</div><div><br>
</div><div>-h</div><div> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000066">
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Thx!<div class="im"><br>
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<div><font size="+1"> Johny Radio<br>
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Stick It In Your Ear!<br>
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