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Video: DC Motor Basics

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Tim Wescott
Guest

Tue Jan 10, 2017 8:30 am   



Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

--
Tim Wescott
Control systems, embedded software and circuit design
I'm looking for work! See my website if you're interested
http://www.wescottdesign.com


Guest

Tue Jan 10, 2017 5:27 pm   



On Tuesday, January 10, 2017 at 6:23:39 AM UTC-5, piglet wrote:
Quote:
On 10/01/2017 06:38, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


Hi Tim,

if you need to make detail parts of the video appear brighter, instead of adjusting brightness and contrast in the editor, try adjusting GAMMA. If your editor does not have gamma adj, find one that does and try it.

keep em, coming,, now I'm looking forward to the next one...

:-)

mark

George Herold
Guest

Tue Jan 10, 2017 5:43 pm   



On Tuesday, January 10, 2017 at 6:23:39 AM UTC-5, piglet wrote:
Quote:
On 10/01/2017 06:38, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


I like it, nice style and not too long. How did you do the graphic?

If ever you redo I thought a little more explanation of the
brushes/commutator switching action and reason for odd number of rotor
segments would answer the kind of question that a young mind leaps to.

I am going to show your video to my kid!

Me too... well I'll send him the link.
(you can lead a horse to water....)

George H.
Quote:

piglet


Robert Baer
Guest

Tue Jan 10, 2017 6:03 pm   



Tim Wescott wrote:
Quote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Your presentation is becoming more professional.
Be careful..Hollywood may be watching...

piglet
Guest

Tue Jan 10, 2017 6:23 pm   



On 10/01/2017 06:38, Tim Wescott wrote:
Quote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


I like it, nice style and not too long. How did you do the graphic?

If ever you redo I thought a little more explanation of the
brushes/commutator switching action and reason for odd number of rotor
segments would answer the kind of question that a young mind leaps to.

I am going to show your video to my kid!

piglet


Guest

Wed Jan 11, 2017 2:47 am   



On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Quote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


Yes... but there is a way you could get the audience more involved. Demonstrate winding inductance by holding the motor wires as you disconnect the battery :)


NT

Tim Wescott
Guest

Wed Jan 11, 2017 6:45 am   



On Tue, 10 Jan 2017 07:27:49 -0800, makolber wrote:

Quote:
On Tuesday, January 10, 2017 at 6:23:39 AM UTC-5, piglet wrote:
On 10/01/2017 06:38, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


Hi Tim,

if you need to make detail parts of the video appear brighter, instead
of adjusting brightness and contrast in the editor, try adjusting GAMMA.
If your editor does not have gamma adj, find one that does and try it.

keep em, coming,, now I'm looking forward to the next one...


I'm not sure I did adjust the brightness and contrast in the editor.
There was a clip where I did that, but I'm pretty sure it's one that I
ended up not using.

But -- I shall remember that.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

I'm looking for work -- see my website!

Tim Wescott
Guest

Wed Jan 11, 2017 6:59 am   



On Tue, 10 Jan 2017 11:23:32 +0000, piglet wrote:

Quote:
On 10/01/2017 06:38, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk


I like it, nice style and not too long. How did you do the graphic?


Thank you. Finding subjects that are a nice fit to a 15-20 minute video
is actually a bit of a chore. 90 minute lectures would be easier, but
far more tedious to watch.

The graphics were generated in Scilab. Its graphics abilities are pretty
crude but it can do the math behind the motion simulation quite easily.
I just did it as stop-motion animation, generating still for each frame
in the video, then put it all together with ffmpeg.

I would like to do nicer-looking graphics in something like Blender, but
my experiences with that are that (A), it takes time to get things
looking good, (B), I'm never going to be much of an artist, (C), I'd have
to bend over backwards to either simulate stuff accurately in Blender, or
import position information, and (D), it's a rabbit hole into which I'm
afraid that I would jump, and then not come out of for a very very long
time. So it'd be lots of time lost for not a lot of gain.

Quote:
If ever you redo I thought a little more explanation of the
brushes/commutator switching action and reason for odd number of rotor
segments would answer the kind of question that a young mind leaps to.

I am going to show your video to my kid!


If it's a hit, there's a bazzilion "build your own motor" vids. I was
considering doing that as part of the video, but I had the sense to check
first; both of the ones that I looked at were winners, so I figured I
didn't need to add anything.

(I did not check to see how many "this is how a motor works" videos there
might be -- I wanted to do this one regardless.)

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

I'm looking for work -- see my website!

Jim Thompson
Guest

Wed Jan 11, 2017 8:00 am   



On Tue, 10 Jan 2017 16:47:16 -0800 (PST), tabbypurr_at_gmail.com wrote:

Quote:
On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved. Demonstrate winding inductance by holding the motor wires as you disconnect the battery :)


NT


Sno-o-o-ort >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Tim Wescott
Guest

Thu Jan 12, 2017 1:00 am   



On Tue, 10 Jan 2017 16:47:16 -0800, tabbypurr wrote:

Quote:
On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved.
Demonstrate winding inductance by holding the motor wires as you
disconnect the battery Smile


Some things are far more interesting experienced from the inside than
viewed from the outside.

I could grab a honkin' big coil from the junkbox and show the spark when
you disconnect it from the battery.

In high school electronics we made "engravers" that were just buzzers
whose contact points worked on the material being engraved. The spark
did the engraving. I remember it being kewl.

--
Tim Wescott
Control systems, embedded software and circuit design
I'm looking for work! See my website if you're interested
http://www.wescottdesign.com

amdx
Guest

Thu Jan 12, 2017 3:14 am   



On 1/10/2017 6:47 PM, tabbypurr_at_gmail.com wrote:
Quote:
On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved. Demonstrate winding inductance by holding the motor wires as you disconnect the battery :)


NT

As a youngster, maybe 12 years old, I put several D cells in a paper
towel cardboard and tried to run a record player motor.
I didn't learn the why, but I learned what the effect it had on my hands.

Mikek

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

amdx
Guest

Thu Jan 12, 2017 3:17 am   



On 1/11/2017 12:00 PM, Tim Wescott wrote:
Quote:
On Tue, 10 Jan 2017 16:47:16 -0800, tabbypurr wrote:

On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved.
Demonstrate winding inductance by holding the motor wires as you
disconnect the battery :)

Some things are far more interesting experienced from the inside than
viewed from the outside.


For another video, explain the operation of a 3 speed fan motor.
I think I'm stuck on the rotating field, but that's why I want the video.

Mikek

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Guest

Thu Jan 12, 2017 6:13 am   



On Thursday, 12 January 2017 04:09:07 UTC, Tim Wescott wrote:
Quote:
On Wed, 11 Jan 2017 14:17:08 -0600, amdx wrote:
On 1/11/2017 12:00 PM, Tim Wescott wrote:
On Tue, 10 Jan 2017 16:47:16 -0800, tabbypurr wrote:
On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:

Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved.
Demonstrate winding inductance by holding the motor wires as you
disconnect the battery :)

Some things are far more interesting experienced from the inside than
viewed from the outside.

For another video, explain the operation of a 3 speed fan motor.
I think I'm stuck on the rotating field, but that's why I want the
video.

If I ever get to the point where I understand one, I sure will!!


Series capacitor reduces current thus torque. The result is greater slip in the motor.

Another way is to select from tappings on the motor winding. There are other ways too of course.


NT


Guest

Thu Jan 12, 2017 6:13 am   



On Wednesday, 11 January 2017 20:14:59 UTC, amdx wrote:
Quote:
On 1/10/2017 6:47 PM, tabbypurr wrote:
On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:

Normally it takes me a while to get a video out. This one came to me and
practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved. Demonstrate winding inductance by holding the motor wires as you disconnect the battery :)


NT

As a youngster, maybe 12 years old, I put several D cells in a paper
towel cardboard and tried to run a record player motor.
I didn't learn the why, but I learned what the effect it had on my hands.

Mikek


I see you've not volunteered to recreate the experiment for him :)


NT

Tim Wescott
Guest

Thu Jan 12, 2017 8:30 am   



On Wed, 11 Jan 2017 14:17:08 -0600, amdx wrote:

Quote:
On 1/11/2017 12:00 PM, Tim Wescott wrote:
On Tue, 10 Jan 2017 16:47:16 -0800, tabbypurr wrote:

On Tuesday, 10 January 2017 06:38:08 UTC, Tim Wescott wrote:
Normally it takes me a while to get a video out. This one came to me
and practically pushed it's way out of my brain and into the camera.

I hope y'all like it:

https://www.youtube.com/watch?v=E9zM07v1vWk

Yes... but there is a way you could get the audience more involved.
Demonstrate winding inductance by holding the motor wires as you
disconnect the battery :)

Some things are far more interesting experienced from the inside than
viewed from the outside.

For another video, explain the operation of a 3 speed fan motor.
I think I'm stuck on the rotating field, but that's why I want the
video.


If I ever get to the point where I understand one, I sure will!!

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

I'm looking for work -- see my website!

Goto page 1, 2  Next

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