Course Electric Machines 2: Asynchronous machines

Includes:

• 1 Experiment card with stator and three-phase winding, run-up and operating capacitor and temperature sensor with constant current source
• 3 Rotors: squirrel-cage, permanent-magnet, rotor with open winding
• Stroboscope with extra-bright LED
• Labsoft browser and course software
• Storage case

Course contents:

• Identifying the most common applications of rotating field machines
• Explanation of the principles of electromagnetic induction
• Explanation of the design and function of rotating field machines
• Explanation of the differences between motor and generator operation
• Introduction to the key components of a rotating field machine, the rotor and stator
• Experimental demonstration of how torque arises and of the generator principle
• Creation of a rotating magnetic field by rotating field machines: experimental demonstration of a rotating magnetic field in the stator
• Introduction to the principle of a 3-phase transformer
• Investigation by measurement of three-phase machines in star and delta configurations.
• Measurement of phase-to-phase and line-to-line voltage and current
• Measurement of rotor voltage and current
• Interpreting a rating plate
• Nominal data and characteristic parameters, power factor, pole-pairs, torque, speed and slip
• Design and function of asynchronous machines
• Investigation of a squirrel-cage rotor, frequency response characteristics, reversal of rotation
• Investigation by measurement of the operating response of a synchronous machine with a permanent magnet rotor
• Introduction to the principle of a capacitor motor (Steinmetz circuit)
• Investigation by measurement of the operating response of a capacitor motor
• Explanation of the importance of temperature monitoring in electrical machines
• Measurement of winding temperature in running machines
• Fault simulation (4 simulated faults activated by relay)

• Course duration. 5.5 h approx.