Journal Article10.1109/TIE.2015.2478392
Modified DC-Bus Voltage-Balancing Algorithm Based Three-Level Neutral-Point-Clamped IPMSM Drive for Electric Vehicle Applications
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TL;DR: A modified dc-link voltage-balancing scheme for a three-level neutral-point-clamped inverter with an interior permanent magnet synchronous machine is presented with a wider range of machine operation including field weakening.
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Abstract: A modified dc-link voltage-balancing scheme for a three-level neutral-point-clamped inverter with an interior permanent magnet synchronous machine is presented with a wider range of machine operation including field weakening. It uses two dc-link voltage sensors to take care of the voltage differences and keeps it to a required tolerance level. A switching control strategy is developed using a space vector pulsewidth modulation scheme. The number of vectors per switching cycle is optimized to five, and changes in the control strategy depending on the two capacitor voltage differences are only allowed to take place at the start of each switching cycle. This helps in reducing the switching losses. A detailed analysis on the larger capacitor voltage deviation at high modulation index and leading power factor is analyzed, and four control strategies are developed to reduce it. Simulation studies are carried out in MATLAB/Simulink platform, and an experimental setup is developed using a DSpace®-based real-time emulator. Simulation and experimental results show the effectiveness of the proposed system.
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Citations
A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters
TL;DR: In this article, a comprehensive review of the Space Vector Modulation (SVM) for the Neutral Point Clamped (NPC) Multi-Level Inverters (MLI) is presented.
A Review of Modulation and Control Techniques for Multilevel Inverters in Traction Applications
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A Review of Multilevel Converters With Parallel Connectivity
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Virtual-Space-Vector PWM for a Three-Level Neutral-Point-Clamped Inverter With Unbalanced DC-Links
TL;DR: The defined virtual SVD (VSVD) for the unbalanced case is theoretically proven identical to the VSVD of the conventional virtual-space-vector PWM (VSVPWM) strategy with balanced dc-links.
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A Flexible Discontinuous Modulation Scheme With Hybrid Capacitor Voltage Balancing Strategy for Three-Level NPC Traction Inverter
TL;DR: A flexible discontinuous modulation strategy for three-level neutral-point-clamped NPC inverter that can shift modulation pattern seamlessly from sinusoidal pulsewidth modulation (SPWM) to discontinuous PWM (DPWM), which results in identical and predictable voltage balancing dynamics for the entire modulation transition.
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