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A capacitor voltage-balancing control strategy based on switching state redundancies is proposed for the hybrid stacked five-level converter. In order to obtain the balancing properties for flying capacitors, a hybrid model in state-space representation is established by considering the continuous and discrete variables. The proposed balancing strategy can control the flying capacitor voltages to...
This paper proposes a new modular multilevel converter with symmetric bidirectional DC fault blocking capability for high voltage direct current transmission systems. The new modular multilevel converter is composed of novel submodules, which is developed from a three-level T-type converter combined with some clamp circuits. The proposed novel submodule can output three voltage levels with six IGBTs,...
A novel hybrid five-level voltage source converter for high-efficiency applications is presented and investigated in this paper, and the topology configuration is based on the upgrade of three-level T-type converter and two-level converter. Compared with traditional stacked multilevel converter and flying capacitor multilevel converter, this hybrid multilevel converter generates desired staircase...
This paper presents a fault diagnosis technique for high-resistance connection (HRC) in nine-phase flux switching permanent magnet (FSPM) machine, which is based on zero sequence voltage components (ZSVC). Firstly, a nine-phase FSPM machine topology is introduced and no-load back electromotive force (EMF) waveforms are analyzed. Then the nine-phase FSPM machine with HRC is modeled and the influence...
The HEFS machines were proposed by reducing the permanent magnet (PM) length of a flux-switching permanent magnet (FSPM) machine and introducing a set of field windings into the saved space. Thus, the HEFS machines shares the identical motor laminations, meanwhile different PM and field winding locations. Based on 2D finite element analysis (FEA), this paper is focused on the comparison of electromagnetic...
The doubly salient permanent magnet (DSPM) machine with full-pitched windings has the advantages such as high power density and high reliability, which has the potential in the applications of wind power generation. There are different ways to improve the full pitched DSPM machine for high performance. Then three topologies of the full pitched DSPM generator are proposed in this paper. The structure...
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