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5.8
Commutator motor
5.8.1
General characteristics
Commutator motors are fitted to appliances with spin speeds of
between 600 and 1,600 rpm.
It is possible that motors produced by manufacturers other than the
original manufacturer may have the same part number, but these are
perfectly interchangeable.
1. Stator
2. Terminal block
3. Commutator
4. Tachometric generator magnet
5. Tachometric generator coil
6. Brush
1. Stator
2. Stator winding
3. Brush
4. Commutator
5. Rotor winding
6. Motor drive shaft
7. Pulley
8. Bearing
9. Tachometric generator coil
10. Magnet
11. Spring
5.8.2
Operating principle
The stator winding is connected in series to the rotor winding (i.e. they are energized in series).
Each section of the rotor winding is connected to a pair of commutator plates (also called "commutators").
The electrical contact between the commutator and the fixed circuit is provided by two brushes which slide in
contact with the commutator plates.
The speed of rotation of the motor is proportional to the power voltage supplied by an electronic control
system.
This is also known as a "universal" motor, since it can be powered either by alternating or direct current.
SOI/DT 2006-01 dmm
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599 37 47-13
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