Speed and Voltage control

System

The experiments are set up with experimental panels in the profile frame. The controlled system or control loop is controlled with the Profi-CASSY and the measured values of interest are recorded.

Learning objectives

• Recognising basic control principles
• Management and fault control
• Handling Analysis and Simulation Software

Function

The 10 W machine set has two DC machines with permanent excitation and an electronically controllable load. The machines are mechanically connected to each other at their shafts and form a motor-generator unit. The electronically controllable load is used to record load characteristics and analyse interference in speed and voltage regulation. The prime mover and load are controlled directly from the upstream controller. An external actuator is not required. A switchable pre-filter gives the 10 W machine set the same dynamic behaviour as a large machine set.

Method

The equipment is equally suitable for demonstrations and student experiments. Experimental procedures are carried out using an electronic manual and the measurement files for CASSY Lab 2 and WinFACT. Plug & Play applies: the experiments start automatically after the measurement file is called up.

Target groups

Vocational training in electrical engineering in trade and industry and students specialising in automation technology and mechatronics. The course offers both introductory courses at a basic level as well as challenging topics for bachelor's programmes.

Themes

• Characteristic curve of the temperature controlled system
• Recording the step response
• Amount optimum, the substitute controlled system
• Technical controller
• Controller in the limit range
• Empirical dimensioning of controllers
• Controller design with known time constants of the controlled system
• Controller design by pole-zero compensation, KR determination in batch run
• Controller design through numerical optimisation
• Rule of thumb method
• Command and fault control with electronic controller
• Temperature control with software controller
• Temperature control with block-orientated PC simulation
• Temperature control with two-point controller, influence of hysteresis
• Two-point controller with delayed feedback
• Two-point controller with delayed feedback
• Temperature control with three-point controller
• Control loop modelling