Talk:Induction motor

Pole pairs

The relationship between pole pairs, frequency and speed is :- f = n*p not f = n*p/120 and also p is the number of pole pairs and not the number of poles.

I think you are using rpm and not revs/sec and you have used poles rather than pole pairs to get the 120. I think this could be a little confusing as the same variables (n and p) are used below.

Ferraris?

Tesla designed the first motor in 1883. Ferraris probably just copied Tesla's work. There is nothing independent about something that is already designed and published in scientific papers. Tesla had many patents to his name. How many in Ferrari's name?

Typical Teslaphile. Accuse everyone for "stealing" Tesla's ideas when Tesla himself was jealous of other engineers and he probably stole others ideas for himslef. Tesla is an overrated patent theif and many of his so called "patents" were failed prototypes that no one uses. Tesla was joke

Suggested edit to Resistance starters

I don't know enough about the subject to be editing anything but the below paragraphs are poor.

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Resistance starters

This method is used with slip ring motors where the rotor poles are connected to the slip rings. At start these are wired with a variable power resistors via brushes and at full speed switched to short circuit.

While start-up the resistors leads to lesser weakening of the field strength from the stator. As a result the inrush current is reduced. Another important advance is higher start-up torque. The resistors also generate a phase shift in the field and thus the resulting magnetic force onto the rotor has a favorable angle.

xxxxxxxxx My suggested edits in bold

Resistance starters

This method is used with slip ring motors where the rotor poles can be accessed byway of the slip rings. Using brushes, variable power resistors are connected in series with the poles. During start-up the resistance is large and then reduced to zero at full speed.

At start-up the resistance results in the stator's field strength being weakened less. As a result, the inrush current is reduced. Another important advantage is higher start-up torque. As well, the resistors generate a phase shift in the field resulting in the magnetic force acting on the rotor having a favorable angle.

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I waited for a response and then went ahead and made the changes. The issues were grammer and not technical understanding.

Winding in real motors

I'm trying to learn about induction motors.

the problem I'm having is that the windings in the models shown in websites, do not look like the ones in actual motors when I open them up.

I think it would help me if someone could tell me how an actual motor is wound and why

thanks

Intro

There are two opposite statements I believe: "An induction motor therefore needs no electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type." But wound type motors NEED an electrical connection to the rotor, so I think these two sentences next to each other don't make sense. ~2026-52249-82 (talk) 18:33, 28 September 2026 (UTC)

I removed the sentence. Constant314 (talk) 19:02, 28 September 2026 (UTC)