Electromechanical Energy Conversion | Transformers | Machines | Power Electronics

In spite of their declining use for industrial purposes DC machines constitute the basis for learning about electrical machines. They demonstrate in a straight-forward manner the various possibilities of open- and closed-loop control of machines.
The following training objectives are dealt with for shunt-wound, series-wound and compound-wound machines:

 
Motor operation:

• Motor connection
• Comparison of shunt-wound, series-wound and compound-wound machines
• Typical machine data
• Open-loop speed control with starter and field regulator
• Reversing the rotation direction
• Load characteristics at constant input voltage
• Measurement evaluations

Generator operation:

• Generator connection
• Armature voltage as a function of the exciter current
• Function and application of the field regulator
• Voltage control, self-excitation and separate excitation
• Armature current and armature voltage at constant speed and constant exciter current
• Load diagram of the generator