2007-01-07 06:38:13 · 4 answers · asked by a1888y 1 in Science & Mathematics ➔ Engineering
Electric motors work by having both the rotor and the stator create magnetic fields, of which at least one changes over time. Commonly, the rotor is a permanent magnet, but other designs uses coil windings in the rotor to create a magnetic field. How do you get electric current to the rotor if it's spinning? Can't attach wires to it. So, a commutator is used, and carbon brushes pushed by springs maintain electrical contact with the commutator, and that's how electric current is delivered to the spinning rotor.
2007-01-07 06:59:17 · answer #1 · answered by Scythian1950 7 · 0⤊ 0⤋
Springs push the carbon brushes against the rotor. The box hold the brushes in place.
2007-01-07 14:45:22 · answer #2 · answered by Mesab123 6 · 0⤊ 0⤋
they let the electricity flow as the motor turns without losing contact or jamming the motor
2007-01-08 14:57:39 · answer #3 · answered by Olly 2 · 0⤊ 0⤋
?
2007-01-07 14:41:34 · answer #4 · answered by bozomo99 1 · 0⤊ 0⤋