Improved DPWM modulation for reducing switching losses in cascaded H-bridge multilevel inverters

The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulati...

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Published inJOURNAL OF POWER ELECTRONICS Vol. 25; no. 1; pp. 46 - 57
Main Authors Ye, Manyuan, Li, Hao, Yao, Jiaxin
Format Journal Article
LanguageEnglish
Published Singapore Springer Nature Singapore 01.01.2025
전력전자학회
Subjects
Electrical Machines and Networks
Engineering
Original Article
Power Electronics
전기공학
CHB multilevel inverter
Power balance
Inverter reliability
Switching loss
Modulation strategy
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Abstract The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulation signal added to the clamping interval so that the switching frequency of each switch remains consistent, which balances the switching loss of each H-bridge unit of the cascaded H-bridge multilevel inverter and improves the reliability of the inverter. The carrier phase-shifting method is used to realize the power balance of each H-bridge unit. Simulation and experimental results verify the feasibility of the modulation strategy.
AbstractList The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulation signal added to the clamping interval so that the switching frequency of each switch remains consistent, which balances the switching loss of each H-bridge unit of the cascaded H-bridge multilevel inverter and improves the reliability of the inverter. The carrier phase-shifting method is used to realize the power balance of each H-bridge unit. Simulation and experimental results verify the feasibility of the modulation strategy. KCI Citation Count: 0
The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulation signal added to the clamping interval so that the switching frequency of each switch remains consistent, which balances the switching loss of each H-bridge unit of the cascaded H-bridge multilevel inverter and improves the reliability of the inverter. The carrier phase-shifting method is used to realize the power balance of each H-bridge unit. Simulation and experimental results verify the feasibility of the modulation strategy.
Author Ye, Manyuan
Li, Hao
Yao, Jiaxin
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Keywords CHB multilevel inverter
Power balance
Inverter reliability
Switching loss
Modulation strategy
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SubjectTerms Electrical Machines and Networks
Engineering
Original Article
Power Electronics
전기공학
Title Improved DPWM modulation for reducing switching losses in cascaded H-bridge multilevel inverters
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