| Title |
Sensorless Control of DC Output Voltage of Three-phase PWM Controlled Rectifier by Active Peak Detection Method |
| DOI |
http://doi.org/10.5207/JIEIE.2023.37.3.008 |
| Keywords |
Active peak detection method; Output voltage and input voltage; Sensorless control; Three-phase PWM controlled rectifier |
| Abstract |
In this study, a method for sensorless estimation of the input voltage and output voltage by measuring the input current of a three-phase PWM controlled rectifier was presented. The output voltage was estimated sensorless by the active peak detection method, and the input voltage was estimated using the input current, switching function, and the estimated value of the output voltage. The proposed method does not require difficult and complicated sampling formulas, and has the advantage of being easy to understand because it is composed of simple formulas and circuit methods. PSIM simulation was performed to prove the validity of this study. Under the condition of 220V/60Hz power source and load=40Ω and output voltage rapidly changing from 450V→510V→420V, the input voltage and output voltage were estimated, and at the same time, the input estimated voltage and the input voltage could be controlled in phase. Finally, the p.f.(Input power factor) was set to 1 for the load change, and the %THD(%Total harmonics distortion) of the input current and the %THD of the estimated input voltage were maintained below 10% and 2%, respectively. |