The experiments are carried out with an industrially manufactured DC machine. The power supply for the machine is provided by the universal converter.
Objectives
- Protective measures and electrical safety
- Construction and commissioning of speed-controlled DC drives
- Evaluation of the control behaviour
- Use of Converter Controller CASSY
With this equipment, you can set up a modern DC drive system to control the speed across four quadrants. The power electronics are realised in the form of a universal converter, which is controlled by the Converter Controller CASSY. A DC shunt machine with an analogue tachometer is used for the drive. The H-bridge circuit enables the speed and direction of rotation to be adjusted.
Highlights:
- The measurements are carried out with the Converter Controller CASSY.
- All measuring channels are potential-free and can therefore be used freely.
- All measurements can be carried out with or without a computer.
- To protect against overheating, the stator windings of the DC machines are equipped with temperature detectors.
- The DC shunt machine has a didactic terminal board with the winding diagram printed on it.
All functions of the Converter Controller CASSY can be operated quickly and directly via the display, the rotary wheel and the buttons on the unit. All settings and measurement results can be saved on the unit and quickly called up again later or simply downloaded.
In addition, the Converter Controller CASSY is fully controllable in real time via RJ45 Ethernet, W-LAN and USB-C interfaces.
These interfaces can be used by the following software:
- CASSY Lab 2 for drives and energy systems,
- MATLAB® and LabVIEW ™
- Lab Docs Editor Advanced
Several integrated servers are available in Converter Controller CASSY for the local media connection of at least four end devices simultaneously.
For more details, see product data 7735290 or 7735291 Converter Controller CASSY.
The equipment is equally suitable for pupil and student experiments in the laboratory with low voltage (DC, AC and three-phase current) and - with a mobile trainer - for teacher demonstrations in the classroom or lecture hall. The experiments are carried out according to the manual.
The target group is made up of commercial apprentices and students of electrical machine construction. The course offers experiments at an intermediate level and also allows for the necessary insight into machine behaviour for scientific interpretation at undergraduate level. The media connection makes the experiments suitable for demonstration in the classroom or a lecture hall.
In the following configurations there are further extended experiments of the drive technology:
- E2.4.3.3 Flyback converters, flow converters and inverters
- E2.6.2.1 DC servo with industrial DC machine
Topics
- Set-up of an H-bridge
- Pulse width control
- Reversing the direction of rotation
- Speed adjustment of DC machines
- Current limit control
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