Talk:DC motor

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Spam[edit]

A link to electojects.com has been repeatedly added to Stepper motor, Electric motor and Brushless DC electric motor by Special:Contributions/217.53.109.235, Special:Contributions/82.201.156.201, Special:Contributions/217.53.107.168, Special:Contributions/217.53.16.164, and others.

The link in question is registered to Abdoh Ali Mohamed, Hay Swesri, Nasr City, Cairo, Egypt.[1]

I wonder if the four IP addresses listed above have any connection... Naw, couldn't be. [2][3][4][5] Egypt is a big country. Must be a coincidence.

I'm going to start patrolling wikipedia for any links to electojects.com or redirects to it and deleting them on sight. If they come back, I'll move to blacklist the address. Mdsummermsw (talk) 18:21, 28 December 2007 (UTC)[reply]

See Talk:Stepper_motor#Spam. - Mdsummermsw (talk) 19:56, 28 December 2007 (UTC)[reply]

Suggestions[edit]

Merge this with other DC motor pages.

Fundamentally, there are 3 types of DC motor - 1. DC (gear) motor, including the type discussed here. 2. DC servo motor, where opposing magnet biases are used to position the motor 3. DC stepper motor, where pulses of current are used to make the rotor "jump" between stable states (no net magnetic force).

There is a great deal of confusion in the hobbyist (robotic/RC) community about how different motors work. A good article on this topic is really needed. Is this the one?

67.142.130.46 (talk) 04:19, 9 October 2008 (UTC) DS[reply]

references or sources[edit]

I added a new section for connection types, and was sure to include references. Does this article still constitute a "This article does not cite any references or sources" message at the top? It clearly has some references now. :) — Preceding unsigned comment added by Ideric (talk • contribs) 18:44, 8 November 2011 (UTC)[reply]

History section needed[edit]

There is no history section. It should at least describe when the first one was around, and whether the technology came before or after AC motors. 85.97.21.117 (talk) 23:36, 29 May 2012 (UTC)[reply]

Brushless with powered rotor, permag stator?[edit]

In the "Brushless motors" section, it is claimed

"Typical brushless DC motors use a rotating permanent magnet in the rotor, and stationary electrical current/coil magnets on the motor housing for the stator, but the symmetrical opposite is also possible."

Of course the opposite is possible - magnets outside, coil inside is shown in the animated diagram of the commutating DC motor. But how then is it a brushless motor? True, if you have DC to AC electronics you don't need a commutator, but you'll still need brushes and slip rings, no? Jeh (talk) 18:29, 5 March 2015 (UTC)[reply]

Convention seems to be that "brushless" motors can have brushes. If it's merely sliprings, and the commutation is electronic, rather than be an electromechanical commutator, then they're still considered to be brushless.

Not unreasonable, as brushes for sliprings have a much greater service life than brushes for commutators. Avoiding current spikes during commutation reduces arcing and brush wear considerably. Andy Dingley (talk) 12:28, 28 April 2015 (UTC)[reply]

I agree re the advantages, but I think we need a reference for that "convention", since it does fly in the face of common sense that a motor that includes brushes are considered "brushless" in any circumstance. Jeh (talk) 21:53, 28 April 2015 (UTC)[reply]

DC series machin[edit]

Field test K. SagarSailaja (talk) 02:50, 5 January 2018 (UTC)[reply]