Neutral point clamped converter for high fundamental frequency applications

D’Errico, Lucia; Lidozzi, Alessandro; Solero, Luca

doi:10.1049/iet-pel.2009.0166

Cited by 11 publications

(3 citation statements)

References 21 publications

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“…As a result, the voltage across a 3-level FB single switch is less than 200 V, which allows for the use of future power MOSFET switches rather than IGBTs. As previously mentioned, a 3-level topology, using the same passive components as the 2-level topology, shows half the voltage and current ripples and a consequent reduction in the losses in the switches and hardware filters which increases the efficiency [8], [9]. With reference to the previous discussion, a 3-level neutral point clamped (NPC) FB topology, which is depicted in Fig.…”

Section: A Inverter Topologymentioning

confidence: 89%

Single-Phase Inverter for Grid-Connected and Intentional Islanding Operations in Electric Utility Systems

Lidozzi¹,

Calzo²,

Solero³

et al. 2016

Journal of Power Electronics

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Small distributed generation units are usually connected to the main electric grid through single-phase voltage source inverters. Grid operating conditions such as voltage and frequency are not constant and can fluctuate within the range values established by international standards. Furthermore, the requirements in terms of power factor correction, total harmonic distortion, and reliability are getting tighter day by day. As a result, the implementation of reliable and efficient control algorithms, which are able to adjust their control parameters in response to changeable grid operating conditions, is essential. This paper investigates the configuration topology and control algorithm of a single-phase inverter with the purpose of achieving high performance in terms of efficiency as well as total harmonic distortion of the output current. Accordingly, a Second Order Generalized Integrator with a suitable Phase Locked Loop (SOGI-PLL) is the basis of the proposed current and voltage regulation. Some practical issues related to the control algorithm are addressed, and a solution for the control architecture is proposed, based on resonant controllers that are continuously tuned on the basis of the actual grid frequency. Further, intentional islanding operation is investigated and a possible procedure for switching from grid-tied to islanding operation and vice-versa is proposed.

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Section: A Inverter Topologymentioning

confidence: 89%

Single-Phase Inverter for Grid-Connected and Intentional Islanding Operations in Electric Utility Systems

Lidozzi¹,

Calzo²,

Solero³

et al. 2016

Journal of Power Electronics

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“…The power converter has a three-level neutral-pointclamp configuration arrangement in order to achieve improved alternator current waveforms and low torque ripple thereby. Further to that, the weight and size of the converter passive components are substantially reduced with respect to more common two-level converter topologies to allow a compact converter package [11].…”

Section: Dual-voltage Automotive Systemmentioning

confidence: 99%

High-Speed Generator and Multilevel Converter for Energy Recovery in Automotive Systems

Crescimbini

Lidozzi

Solero

2012

IEEE Trans. Ind. Electron.

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This paper deals with the design solution adopted for a high-speed axial-flux permanent-magnet generator devoted to supplementing power in automotive 42 V electrical systems through a low-voltage multilevel neutral-point-clamped converter. The axial-flux permanent-magnet generator is suitably designed to be directly coupled with a radial turbo-expander which provides recovery of kinetic energy available from the exhaust gases of an internal-combustion engine. The multilevel converter is properly sized for systems having low voltage and high first-order harmonic frequency. The paper describes the proposed 4-kW power rating generating system and discusses various issues resulting from electromagnetic, thermal, and mechanical design of the high-speed axial-flux permanent-magnet generator. As well, investigations on modulation strategy, total harmonic distortion, and power losses are presented for the low-voltage neutral-point-clamped power electronic converter.

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“…The BLDCM winding current experiences high ripple current if driven from the conventional two-level inverter and very high switching frequency is required to mitigate the current ripple [22]. Three-level inverters are the most suitable solution for low-and medium-power applications, and they produce lower converter losses at >10 kHz switching frequency compared with the two-level inverter [23][24][25]. A metal oxide semiconductor field effect transistor (MOSFET)-based inverter operates with 98.6% efficiency at 80 kHz switching frequency without notable switching loss [26].…”

Section: Introductionmentioning

confidence: 99%

Approach for torque ripple reduction for brushless DC motor based on three‐level neutral‐point‐clamped inverter with DC–DC converter

Vaiyapuri

Jeevananthan

2015

IET Power Electronics

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This study proposes a novel topology for reducing commutation torque ripple in a brushless DC motor (BLDCM) drive system using a three-level neutral-point-clamped (NPC) inverter combined with single-ended primary-inductor converter (SEPIC) converters. In the BLDCM, current ripples arise because of the influence of stator winding inductance, which generates torque ripples. The torque ripple that is generated in the commutation period prevents the use of BLDCM in high-precision servo drive systems. In this study, two-stage converters are proposed to reduce the torque ripple. The first stage consists of two SEPIC converters to obtain the desired commutation voltage according to motor speed. A dc-link voltage selection circuit is combined with the SEPIC converters to apply the optimised voltage during the commutation interval. To reduce the torque ripple further, a three-level NPC inverter is used to apply a half dc-link voltage across the motor winding and this effectively reduces the torque ripple. Experimental results show that the proposed topology is able to reduce commutation torque ripple significantly under both low-speed and high-speed operation.

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Neutral point clamped converter for high fundamental frequency applications

Cited by 11 publications

References 21 publications

Single-Phase Inverter for Grid-Connected and Intentional Islanding Operations in Electric Utility Systems

Single-Phase Inverter for Grid-Connected and Intentional Islanding Operations in Electric Utility Systems

High-Speed Generator and Multilevel Converter for Energy Recovery in Automotive Systems

Approach for torque ripple reduction for brushless DC motor based on three‐level neutral‐point‐clamped inverter with DC–DC converter

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