I was doing a seminary pqper on dc motors with brushs and thought if the motor could work on the concept of the sqme magnetic poles pushing eachother. From experience i feel like it’s harder to keep two same poles together that two different ones apart. So the question is, what is the difference between a push end pull force, if any?
In: Physics
When a typical brushed-DC motor is unpowered, not rotating, you’ll only have permanent magnets around the rotor. The rotor would be made of laminated sheets of soft iron that are always attracted to the local external magnetic fields. (Ferromagnetism.)
The situation is different when the DC motor is powered. The powered windings in the rotor will create magnetic fields. Then the magnetic fields of the rotor will participate in a push/pull with the alternating permanent magnet polarities arranged around the rotor.
The force is a function of the amount of magnetic flux, not the direction. As a result “pull” = “push”.
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