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#1
posted to rec.boats
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17' Mahogany runabout just completed
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#2
posted to rec.boats
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17' Mahogany runabout just completed
wrote in message ... On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Eisboch |
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#3
posted to rec.boats
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17' Mahogany runabout just completed
"Eisboch" wrote in message ... wrote in message ... On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Eisboch I checked with my friend Google and found the answer, which is "Yes". I have to get out of my 20 year old technology and learn some new stuff. Eisboch |
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#4
posted to rec.boats
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17' Mahogany runabout just completed
On Thu, 29 Nov 2007 15:14:38 -0500, "Eisboch"
wrote: wrote in message .. . On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Well, yes - with a qualification. My knowledge of it comes from communications technology and what I read with respect to my new trolling motor. But I believe it is used in both. I could be wrong. I often am. Are? :) |
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#5
posted to rec.boats
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17' Mahogany runabout just completed
"Short Wave Sportfishing" wrote in message ... On Thu, 29 Nov 2007 15:14:38 -0500, "Eisboch" wrote: wrote in message . .. On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Well, yes - with a qualification. My knowledge of it comes from communications technology and what I read with respect to my new trolling motor. But I believe it is used in both. I could be wrong. I often am. Are? :) This is good stuff. (the answer is "yes"). Everyday I feel like technology is leaving me in the dust, especially since I stopped working and trying to keep current. Turns out it's also responsible for the higher quality of SACD recordings. Eisboch |
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#6
posted to rec.boats
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17' Mahogany runabout just completed
On Thu, 29 Nov 2007 15:51:52 -0500, "Eisboch"
wrote: "Short Wave Sportfishing" wrote in message .. . On Thu, 29 Nov 2007 15:14:38 -0500, "Eisboch" wrote: wrote in message ... On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Well, yes - with a qualification. My knowledge of it comes from communications technology and what I read with respect to my new trolling motor. But I believe it is used in both. I could be wrong. I often am. Are? :) This is good stuff. (the answer is "yes"). Everyday I feel like technology is leaving me in the dust, especially since I stopped working and trying to keep current. Tell me about it. They left my mumbling to myself in '94. :) Turns out it's also responsible for the higher quality of SACD recordings. Didn't know that. |
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#7
posted to rec.boats
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17' Mahogany runabout just completed
"Eisboch" wrote in message ... wrote in message ... On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing wrote: On Thu, 29 Nov 2007 13:12:52 -0500, wrote: Another big breakthrough in electric motor efficiency is PWM, or "pulse width modulation" used for controlling the speed Sorry - I didn't see your answer until it was too late. Thanks for the backup! LOL Is it used in both AC induction motors as well as DC permanent magnet motors? Eisboch Yup, the PWM on AC just allows a wider part of the max voltage part of a sine wave to be passed to the motor. |
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