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close this bookElectrical Machines - Basic Vocational Knowledge (IBE - Deutschland; 144 pages)
View the documentIntroduction
Open this folder and view contents1. General information about electrical machines
Open this folder and view contents2. Basic principles
Open this folder and view contents3. Execution of rotating electrical machines
Open this folder and view contents4. Synchronous machines
Open this folder and view contents5. Asynchronous motors
Open this folder and view contents6. Direct current machines
close this folder7. Single-phase alternating current motors
Open this folder and view contents7.1. Single-phase asynchronous motors (single-phase induction motors)
Open this folder and view contents7.2. Three-phase asynchronous motor in single-phase operation (capacitor motor)
View the document7.3. Split pole motors
close this folder7.4. Single-phase commutator motors (universal motors)
View the document7.4.1. Assembly
View the document7.4.2. Operating principles
View the document7.4.3. Operational behaviour
View the document7.4.4. Technical data
Open this folder and view contents8. Transformer
 

7.4.1. Assembly

A universal motor can be driven both by single-phase and direct current voltage. Both assembly and circuitry correspond to direct current series motors.


Figure 120 - Circuitry of a universal motor with interference suppression capacitor

1 Direct current
2 Alternating current
3 Terminal designations

Because of the low power and subsequent minimal incidence of commutator sparking, universal motor stators dispense with interpole and compensation windings.

Figure 121 shows the lamella section of a universal motor. The exciter windings, also known as pole or field coils, have been positioned on the pole core.


Figure 121 - Lamella form of a universal motor

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