Speed and Voltage Control

 System
The experiments are set up with experiment plates in profile frames. The controlled system or control circuit are activated with the Profi-CASSY and the relevant measurement values recorded.

Objectives

• Get familiar with the basic principles of controllers
• Setpoint and disturbance control
• Handle analysis and simulation software

Function
The 10 W machine set has two direct current machines with permanent excitation and an electronically controllable load. The machines are mechanically connected to each other by way of their shafts and come together to form a motor-generator unit. Load characteristic lines are recorded and disturbance interferences in speed and voltage control are investigated with the electronically controllable load. The drive engine and load are driven directly by the upstream controller. An external control element is not necessary for this. A switchable prefiltergives the 10 W machine set the dynamic behaviour of a larger machine set.

Method
The equipment is ideal for demonstration and students' experiments. The tests were carried out with an electronic manual and the data files for CASSY Lab 2 and WinFACT. It is true Plug & Play: The measurement starts automatically after loading the data file.

Target groups
Students completing vocational training in electrical engineering for industry and students of automation engineering and mechatronics are the target group. The course offers introductory experiments that are very simple and also addresses difficult topics for bachelor-level studies.

Topics

• Characteristic curve for the temperature controlling system
• Recording the jump response
• Optimal amount, replacement controlled system
• Technical controller
• Controller in the limit range
• Empirical tuning of controllers
• Control unit design with known time constants for the controlled system
• Controller design zero-pole compensation, KP determination in batch run
• Control unit design through numerical optimization
• Rule of thumb method
• Setpoint and disturbance control with electronic controllers
• Temperature regulation with a software controller
• Temperature controlling with block-oriented PC simulation
• Temperature control with two-point controller, influence of hysteresis
• Two-point controller with delayed feedback
• Two-point controller with delayed weakening feedback
• Temperature regulation with three-point controller
• Control circuit modelling

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