Electrical and Electronics: Module 10

Module 10A: Direct Current Generators, Basic Shunt (Optional)

Suggested time: 5 - 7 hours

Level: Advanced

Prerequisite: Module 2

Foundational Objectives

To use appropriate terminology for electricity or electronics in context.
To test and evaluate the integrity of electrical and electronic components.
To become knowledgeable of the various principles and characteristics of electricity and electronics.

Common Essential Learnings Foundational Objectives

To identify the parts and understand the workings of different types of direct current generators. (COM)
To connect different types of direct current generators to a circuit. (IL)
To select the appropriate generator for a specific purpose. (CCT)

Learning Objectives	Notes
BASIC SHUNT GENERATORS series and compound generators
10.1 To understand how different generators work.	Compare self-excited generators and separately-excited generators.
10.2 To identify the windings and parts of the generator.	Students may study a disassembled generator and name all its parts. Using an ohmmeter, students should identify the different windings by their resistance.
10.3 To explain the conditions necessary for voltage build-up in a series generator.	Students will connect a series generator and, under a controlled setting, observe what will happen with no load.
10.4 To identify the windings in a series generator.	Students will study a disassembled series generator and label all the parts. Using an ohmmeter, have students identify the different windings.
10.5 To describe where a series generator may be used. (COM)	Students should discuss where a series generator may best be used.
10.6 To explain the various types of compound generator connections.	Students may connect different compound generators.
10.7 To describe where a compound generator may be used. (COM)	Discuss where a compound generator may best be used.
10.8 To explain commutation and its effect.	Students will wire up a generator and suggest why a commutator has to be used.

Module 10B: Direct Current Generators, Advanced Shunt (Optional)

Suggested time: 5 - 15 hours

Level: Advanced

Prerequisite: Module 10A

Learning Objectives	Notes
ADVANCED SHUNT GENERATORS
10.9 To connect a shunt generator with self-excited and separately-excited configuration. (IL)	Have the students wire shunt generators with self-excited and separately-excited configurations and observe the differences between the two types of generators.
10.10 To explain the relationship between the direction of rotation, field flux and the output polarity of a shunt generator. (CCT)	Have students wire a shunt generator and observe the effects of speed variation on load characteristics.
10.11 To explain power losses in a DC generator and calculate generator efficiency. (NUM)	Students will observe different DC generator readings and calculate power loss and efficiency.
10.12 To correctly connect a series generator to a loaded circuit. (IL)	Connect a series generator to a circuit with a load.
10.13 To plot a voltage regulation curve for a series generator. (NUM)	Connect a series generator to a suitable load and take the readings from the measuring instruments to collect data for a voltage regulation curve.