Ahmad, Mohsin Ejaz: Development of a novel simple-to-implement digital current observer for DC-DC converters and PFC-rectifiers : von Mohsin Ejaz Ahmad; Erster Gutachter: Prof. Dr.-Ing. Joachim Böcker, Zweiter Gutachter: Prof. Dr.-Ing. habil. Peter Zacharias. Paderborn, 2025
Content
- Contents
- 1 Introduction
- 2 Current Measurement Methods in Switching converters
- 2.1 Properties of a current sensor
- 2.2 Types of Current Sensor
- 2.3 Current Measurement in a Half-Bridge
- 2.4 Current Observer Concept
- 3 Current Analysis in a Power Electronic Circuit
- 3.1 Three-level neutral point clamped inverter
- 3.2 Capacitor Stress Current Calculation
- 3.3 Power Electronic Switches Current Calculation
- 4 Digital Current Observer
- 4.1 Principle of Operation
- 4.2 Digital voltage-time product estimation
- 4.3 Inductor voltage sampling
- 4.4 Time capture modules
- 5 Implementation of digital current observer for DC-DC converter
- 6 Implementation of a current observer for PFC rectifiers
- 6.1 Boost power factor correction rectifier
- 6.2 Bridgeless boost HPFC rectifier
- 6.3 Totem-pole PFC
- 6.4 Closed-loop control
- 6.5 Simulation Model
- 6.6 Experimental setup
- 7 Results and Accuracy Assessment
- 8 Conclusions
- A Appendix
- Bibliography