E 2.4.3.2 Zasilanie impulsowe
Opis
The experiments are carried out on training panels in panel frames.
Objectives
- Protective measures and electrical safety
- Circuit assembly and wiring according to circuit diagrams
- Use of commercial measuring instruments: hand-held multimeters and oscilloscopes
Power electronics allows for power supplies to be built which are characterised by high efficiency and compact size. This is achieved using switching components and switching frequencies which are as high as possible. The following experiments on primary switched-mode power supplies can be set up and their properties investigated:
- Single-ended forward converters
- Push-pull converters
- Asymmetric half-bridge forward converters
- Full-bridge forward converters
- Flyback converters
The equipment set is suitable both for student experiments in a lab using low voltage (400 V three-phase) and on a mobile trolley for demonstrations by teachers in a classroom. The experiment procedures are contained in a printed 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.
Topics
- Step-down converters with various loads
- Control of average values for voltage and current using PWM
- How voltage and current change over time with a resistive load
- How voltage and current change over time with a resistive-inductive load
- Resistive-inductive load with freewheeling diode and smoothing capacitor
- Step-down converter with VI = 110 V, losses, efficiency
- Step-up/step-down converters
- Control of average values for voltage and current using PWM
- Measurement of voltage and current over time when VI = 15 V
- Measurement of voltage and current over time when VI = 110 V
- Measurement with intermittent choke current
- Step-up/step-down converters with power factor correction
- Effect of hysteresis
- Flyback converters
- Control of average values for voltage and current using PWM
- Measurement of voltage and current over time when VI = 15 V
- Effect of RCD protective circuitry
- Measurement of voltage and current over time when VI = 110 V
| 734 02 | Reference variable generator | 1 |
| 735 02 | Diode, 1000 V/10 A | 4 |
| 735 09 | Load power electronics | 1 |
| 735 18 | Fuse threefold super-fast | 1 |
| 735 065 | Rectifier B6, 3X400 V/10 A | 1 |
| 735 095 | Capacitors 2x 1000 µF, 385 V | 1 |
| 735 105 | Transformer for SMPS | 1 |
| 735 190 | Phase control noise filter 3 x 4.5 A | 1 |
| 735 341 | Control unit PWM/PFM | 1 |
| 735 346 | IGBT 1000 V/10 A | 3 |
| 501 02 | BNC cable, 1 m | 2 |
| 531 282 | Multimeter Metrahit Pro | 2 |
| 575 231 | Probe 100 MHz, 1:1 / 10:1 | 2 |
| 575 230 | Digital storage oscilloscope 722 | 1 |
| 735 261 | Isolation amplifier, four channel | 1 |
| 726 09 | Panel frame T130, two-level | 1 |
| 726 86 | DC-Power Supply ± 15 V/3 A | 1 |
| 726 80 | Transformer, 45/90, 3 N | 1 |
| 500 59 | Safety bridging plugs, black, set of 10 | 2 |
| 500 851 | Safety connecting leads, 32 A, set of 32 | 1 |
| 500 852 | Safety connecting leads, 32 A, yellow/green, set of 10 | 1 |
| 565 401 | LIT: Power Electronics and Drive Technology, T 12.2.2.2 & T 12.2.2.3 (in German) | 1 |
| 565 331L | LIT: Power Electronics and Drive Technology, T 12.2.2.1 (in German) | 1 |
| 565 331S | LIT: Power Electronics and Drive Technology, T 12.2.2.1 (in German) | 1 |
| 565 332 | * LIT: Power Electronics and Drive Technology, T 12.2.2.1 (in English) | 1 |
Articles marked with * are not essential, we do however recommend them to carry out the experiment.
Marka
Leybold
