Conference proceedings article
Novel current balancing method for HF interleaved converters with reduced control effort
Publication Details
Authors: | Beckemeier, C.; Friebe, J. |
Editor: | European Centre for Creative Economy |
Publisher: | Institute of Electrical and Electronics Engineers Inc |
Place: | United States |
Publication year: | 2022 |
Pages range : | 1-7 |
Book title: | 24th European Conference on Power Electronics and Applications EPE 2022 ECCE Europe |
ISBN: | 978-1-6654-8700-9 |
Abstract
The Active Neutral Point Clamped (ANPC) topology as a three level inverter is particularly well suited for subdivision into fundamental switching semiconductors and modulating fast switching semiconductors. This allows each semiconductor to be selected for its best characteristics. One part of a hybrid ANPC inverter can be realized with high frequency interleaved stages based on wide bandgap power semiconductors. A challenge is the calculation effort of the duty cycle for this high switching frequency especially due to the interleaved based stages. It is often considered that the reduction of the calculation effort has a negative impact on the current accounting. This paper proposes a simplified method for the balancing of the current in the interleaved stages with significantly reduced control frequency. An active current symmetry should be implemented which would be easier due to the reduced control effort. In this paper this method is experimentally validated without active current symmetry control.
The Active Neutral Point Clamped (ANPC) topology as a three level inverter is particularly well suited for subdivision into fundamental switching semiconductors and modulating fast switching semiconductors. This allows each semiconductor to be selected for its best characteristics. One part of a hybrid ANPC inverter can be realized with high frequency interleaved stages based on wide bandgap power semiconductors. A challenge is the calculation effort of the duty cycle for this high switching frequency especially due to the interleaved based stages. It is often considered that the reduction of the calculation effort has a negative impact on the current accounting. This paper proposes a simplified method for the balancing of the current in the interleaved stages with significantly reduced control frequency. An active current symmetry should be implemented which would be easier due to the reduced control effort. In this paper this method is experimentally validated without active current symmetry control.
Keywords
Current sharing High frequency power converter Interleaved converter Microcontrollers Multi-level inverters
