The experiments are carried out on training panels in panel frames.
Objectives
- Protective measures and electrical safety
- Circuit assembly and connections according to circuit diagrams
- Use of Power Analyser CASSY Plus
Primary switched-mode power supplies have a converter, there are two different converter principles:
Flyback converter
- Circuit design and function
- Control of the voltage and current average
- Influence of the RCD protective circuit.
Flow converter
- Single-ended flow transformer
- Asymmetrical half-bridge flow converter.
In the last part of the experiments, investigations are carried out on the DC controller and the inverter.
Highlights:
- To protect the semiconductor components, all experiments are only tested with a low voltage.
- The measurements are carried out with the Power Analyser Plus.
- All measurement channels are potential-free and can therefore be used freely.
- All measurements can be carried out with or without a computer.
All functions of the Power Analyser 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 Power Analyser 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
The following integrated servers are available in the Power Analyser CASSY for the local media connection of at least four end devices simultaneously.
For more details, see product data 727110 or 727111 Power Analyser CASSY.
The individual equipment is equally suitable for student experiments in the laboratory with low voltage (230 / 400 V three-phase current) and - with a mobile trainer - for teacher demonstration in the classroom. 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 power electronics:
- E2.4.3.1 Switchable valves and DC controllers
- E2.4.3.2 Switched-mode power supplies
- E2.5.2.2 Four-quadrant drive of a DC machine with an IGBT H-bridge circuit
- E2.5.3.2 Basics of frequency converter technology
Topics
Single-ended forward converter
- Control of average values for voltage and current using PWM
- Measurement of voltage and current over time when VI = 30 V
- Measurement of voltage and current over time when VI = 115 V
- Measurement of efficiency and voltage stability
Asymmetric half-bridge forward converter
- Control of average values for voltage and current using PWM
- Time characteristic when v = 0.75
- Time characteristic when v = 0.50
- Time characteristic with duty cycle switch-over
Inverter
- Time characteristic for sinusoidal inverter
- Inverter with VI = 115 V
- Inverter with VI = 115 V, f = 5 kHz
