SOI/DT 2006-01 dmm
43/71
599 37 47-13
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.