Course Electric Machines 1: DC machines

Includes:

• 1 Experiment card with open, 2-pole stator and 2 exciter windings, temperature sensor with voltage source, starting and load resistors
• Rotor with adjustable brushes
• Stroboscope with extra-bright LED
• Storage case
• Labsoft browser and course software

Course contents:

• Identifying the most common applications for DC machines
• Explanation of electromagnetic induction and the Lorentz force
• Explanation of design and function of commutated machines (DC machines)
• Introduction to the key components of commutated machines, stator, commutator and carbon brushes
• Measurement of current and voltage in armature and exciter and determining the armature and exciter impedances
• Interpreting a rating plate
• Introduction to circuit diagrams and characteristics for various types of connection: series, shunt and compound windings
• Connection and operation of DC machines in various operating modes
• Speed measurement using a stroboscope
• Introduction to various types of speed regulation and reversal: field weakening, modification by means of armature and field resistors
• Experimental investigation of various methods for controlling speed and direction of rotation
• Connection and operation of commutated machines with AC voltages: universal motors
• Introduction to methods of braking DC machines
• Measurement of current and voltage when braking DC machines
• Explain the importance of temperature monitoring for electrical machines
• Temperature measurement in the exciter winding when a machine is running using a semiconductor sensor
• Course duration. 5.5 h approx.