Thank you so much for you effort , You explained to me what shunt and compound meant in five minutes, despite the fact that I have been studying electrical engineering for two years and I did not understand anything from them.😂
Not sure I feel comfortable with either of those adjectives... I'm more of a fake it til you make it individual. Thanks for the kind words Jered. All the best. Pete
Great information. I'm just beginning to absorb what I can. Would you happen to have any experience or knowledge of antique Electric Vehicles? I am working on a 1917 Detroit Electric and I really have no idea what type of DC motor it has. It has four Field inputs and two Armature inputs (forward and reverse). There is an external "starting coil" and another external "speed Shunt". The power comes from two 42V battery packs which are configured into either 42 volts parallel or 84 volts serial depending on which of the 5 speeds that you select. Sounds interesting doesn't it. I would love to get your comments and could send you a wiring diagram if you're interested.
I'm working on an old AEG compound motor that has a third series winding located between A1/S2 on your drawing, and is physically located on the side wall of the motor between the top/bottom windings. Can you tell me what it's purpose is? Also, does the motor ever care about the polarity of the incoming DC? I would think not; what about the controller? The one I'm using is a 1940's SquareD dashpot style, and the drawing does not note polarity anywhere.
Polarity of the source doesn't really matter. As the source polarity changes, so does the Armature and the Field Pole windings. The additional winding is most likely an Interpole. Interpoles are connected in series with the Armature to push the expanding magnetic field back into the motor to maintain torque and to reduce the shift in the neutral plane which causes arcing and sparking at the brushes.
hey Pete ; first of all, I would like to thank you for taking the time to put together these videos. As I am not well versed on this topic i have a lots of questions loll the way i understand basic dc motor operation is that you have two magnet and a current carrying conductor, the magnetic field created by the conductor interacts with the magnetic field between the two poles ( north and south ) to create movement or force ? Now when you are referring to series or shunt dc motors were are using non-magnetic poles wind them with wire and induce a magnetic field between the two poles to create a magnetic field? is this right? why not just use a permanent magnet?
Correct on all accounts. The reason you use an electromagnet rather than a permanent magnet is to have the ability to vary the current and create either a stronger or weaker electromagnetic field. DC motors are a great place to start understanding motor theory. However, they are being phased out, and brushless DC motors are now found in drills, etc. Brushless DC motors are a completely different animal... closer to a 3 phase motor controlled by a vfd.
My understanding is that the Series winding is in series with the Armature... so when a larger load is placed on the shaft of the motor, the motor is going to slow down. When is slows down, there is less cEMF generated on the armature due to less cutting action of the armature conductors through the series/shunt magnetic fields. With less cEMF, more current can flow through the series winding and armature.... instantaneously providing more resulting magnetic fields to produce more torque to overcome that increase in load. The motor will go back up to its base speed very quickly, which results in more cEMF, which reduces the current flowing on the series winding and the armature. It is a self-regulating circuit that instantly provides more magnetic fields due to the low resistance of the series winding. Hope this helps. Pete
Thank you so much for you effort , You explained to me what shunt and compound meant in five minutes, despite the fact that I have been studying electrical engineering for two years and I did not understand anything from them.😂
Thanks i watch all the dc motors it give me alot off knowledge plss.. make some more like how to troubleshoot motors. 👍🇵🇭
The video helped in such a way no other video did
So good to hear this. Thanks Sandesh
best explanation i found in this topic...u r king
Best video there is on this topic, thanks for sharing !
Thanks for the nice comment Fikri. Pete
Great demonstration, thank you.
Nice....With crystal clear explanation..
you are a legend!! thanks for help brazilians students!
Any time. Glad it helped. Feel free to request new topics later on.
Great video, thanks for the amazing clarity in the explanation.
Excellent! Thanks for breaking this down logically.
Hi pete..Can i ask if there is an adverse effect on the motor if the series winding is on the negative side of the source..
None. You just have to make sure that S1 and F1 reference the same side of your source.
where I can buy this Labvolt Models
Hi thanks, your video helped me to reverse a motor I am currently working on.
is that a short shunt commulative compound ???
Long shunt I think
You're a gentleman and a scholar
Not sure I feel comfortable with either of those adjectives... I'm more of a fake it til you make it individual. Thanks for the kind words Jered. All the best. Pete
Thanks Pete. Nice diagrams.
Great information. I'm just beginning to absorb what I can. Would you happen to have any experience or knowledge of antique Electric Vehicles? I am working on a 1917 Detroit Electric and I really have no idea what type of DC motor it has. It has four Field inputs and two Armature inputs (forward and reverse). There is an external "starting coil" and another external "speed Shunt". The power comes from two 42V battery packs which are configured into either 42 volts parallel or 84 volts serial depending on which of the 5 speeds that you select. Sounds interesting doesn't it. I would love to get your comments and could send you a wiring diagram if you're interested.
I'm working on an old AEG compound motor that has a third series winding located between A1/S2 on your drawing, and is physically located on the side wall of the motor between the top/bottom windings. Can you tell me what it's purpose is? Also, does the motor ever care about the polarity of the incoming DC? I would think not; what about the controller? The one I'm using is a 1940's SquareD dashpot style, and the drawing does not note polarity anywhere.
Polarity of the source doesn't really matter. As the source polarity changes, so does the Armature and the Field Pole windings.
The additional winding is most likely an Interpole. Interpoles are connected in series with the Armature to push the expanding magnetic field back into the motor to maintain torque and to reduce the shift in the neutral plane which causes arcing and sparking at the brushes.
YOU ARE THE BEST! THANK YOU VERY MUCH
Any time. Glad it helped.
hey Pete ; first of all, I would like to thank you for taking the time to put together these videos. As I am not well versed on this topic i have a lots of questions loll the way i understand basic dc motor operation is that you have two magnet and a current carrying conductor, the magnetic field created by the conductor interacts with the magnetic field between the two poles ( north and south ) to create movement or force ? Now when you are referring to series or shunt dc motors were are using non-magnetic poles wind them with wire and induce a magnetic field between the two poles to create a magnetic field? is this right? why not just use a permanent magnet?
Correct on all accounts. The reason you use an electromagnet rather than a permanent magnet is to have the ability to vary the current and create either a stronger or weaker electromagnetic field.
DC motors are a great place to start understanding motor theory. However, they are being phased out, and brushless DC motors are now found in drills, etc. Brushless DC motors are a completely different animal... closer to a 3 phase motor controlled by a vfd.
Pete Vree will you have a video on brushless motor :)
Not any time soon. Check out Learn Engineeering or Great Scott for good videos on this topic.
Pete Vree thank you for the quick replies
@@PeteVree why arent compound dc .otors popular?
Where are they usually used?
Hi Pete. Is it possible for you explain how a cumulatively compound motor utilizes the series winding to compensate for load variations. Thanks
My understanding is that the Series winding is in series with the Armature... so when a larger load is placed on the shaft of the motor, the motor is going to slow down. When is slows down, there is less cEMF generated on the armature due to less cutting action of the armature conductors through the series/shunt magnetic fields. With less cEMF, more current can flow through the series winding and armature.... instantaneously providing more resulting magnetic fields to produce more torque to overcome that increase in load. The motor will go back up to its base speed very quickly, which results in more cEMF, which reduces the current flowing on the series winding and the armature. It is a self-regulating circuit that instantly provides more magnetic fields due to the low resistance of the series winding. Hope this helps. Pete
What we should do to increase the speed of motor
Thanking you a million times
Thanks for watching. Glad it helped out. All the best. Pete
Which software and hardware is he using to make such a video?
Hi Aditya, I am using a Microsoft Surface Pro 3, and I am just writing on a Power Point page.
great demo sir! may I just ask the nameplate of the motor you've used sir?
1/4 hp 1800 rpm 120V DC Supply FLA 2.8A
LabVolt EMS 8211 DC Machine Generator Motor Electromechanical Training System
Thanks sir! Great help.. I subscribed.. :)
so beautiful
Excellent!!
Thank u very much sir....
now..dats..some.. explanation!!!!
Fine !
super boss