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A variable switching frequency control method for active front end multilevel rectifier

Ouni, S ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1109/EEEIC.2017.7977783
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2017
  4. Abstract:
  5. Conventional back-to-back converters with input power factor correction are still the best solution for motor drive applications which are usually subjected to considerable load changes during their operation. Since converter components, especially input-side inductances are designed for nominal power rating, the rated input power factor and input current distortion aren't achievable in light loads. In this paper a control method is proposed to improve the input current distortion and input power factor in light loads. This is achieved by increasing the switching frequency according to the reduction in load. Since conduction and switching losses decrease in light loads, the overall losses by rising in switching frequency remain almost constant where the current is reducing. In this work, the total losses are considered proportional with the current. The effectiveness of the method is verified by simulations in which the input current distortion and power factor are improved using the proposed method at light loads compared to conventional fixed switching frequency control algorithms. © 2017 IEEE
  6. Keywords:
  7. Neutral Point Clamped Multilevel Converters ; Switching Losses ; Electric distortion ; Electric drives ; Power converters ; Rectifying circuits ; Switching ; Switching frequency ; Active front ends ; Back-to-back converter ; Input current distortion ; Input power factor ; Motor drive applications ; Multilevel converter ; Multilevel rectifier ; Switching loss ; Electric rectifiers
  8. Source: 17th IEEE International Conference on Environment and Electrical Engineering and 2017 1st IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2017, 6 June 2017 through 9 June 2017 ; 2017 ; 9781538639160 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/7977783