E 2.5.3.1 Napędy z silnikami indukcyjnymi

The power electronics part of this lab practical uses training panels. The electrical machine employed is an industrial machine on a base, whereby the characteristics of the machine can be determined using the Machine test system 0.3. Power is supplied to the machine under test via a static converter, which obtains its power from the (three-phase) mains network.

Objectives

• Protective measures and electrical safety
• Set-up of power generating systems according to circuit diagrams
• Putting electrical drives into operation
• Recording of load characteristics with various operating parameters
• Achieving skills in measuring electrical machines
• Automatic speed control for an asynchronous (induction) machine

This equipment set allows experiments on how the speed of asynchronous (induction) machines can be modified using line-commutated static converters. The speed of the machine depends on the stator voltage and rotor impedance and can be adjusted in the experiment by changing these two variables. As well as putting the machine into operation and setting its parameters, the main thing considered is the change in the response of the machine. This involves recording load characteristics and determining key parameters. Addition of a PID controller allows the experiment set-ups to be enhanced into variable-speed drives with closed-loop speed control.

Students work in the power engineering lab with mains voltage. Experiments procedures are contained in a printed manual.

The experiments are designed for intermediate and advanced levels.

Topics

• Drives using motors with slip-ring rotors and three-phase power controllers
• Drives using motors with slip-ring rotors and pulse-controlled rotor impedance
• Drives using motors with slip-ring rotors and static converter cascades

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