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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.
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.
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2005.11 dmm
599 37 38-46
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