Item No.: CO4204-7S

Course - Electric Machines 1: DC machines


  • 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

  • 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.