Two-phase modulation technique for three-level inverter fed AC drives

Halasz, S.; Huu, B.T.; Zakharov, A. A.

doi:10.1109/melcon.1998.699426

Cited by 14 publications

(9 citation statements)

References 8 publications

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“…Finally, the CM offset can be then found from (15), and the resulting modulating signals for the carrier-based implementation are given by (16). This is the author's version of an article that has been published in this journal.…”

Section: Simplified Procedures To Obtain the Carrier-based Implemenmentioning

confidence: 99%

A Novel Approach to Generate Effective Carrier-Based Pulsewidth Modulation Strategies for Diode-Clamped Multilevel DC–AC Converters

Maheshwari

Busquets‐Monge

Nicolás-Apruzzese

2016

IEEE Trans. Ind. Electron.

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Abstract-Several pulsewidth modulation (PWM) strategies have been proposed for three-phase multilevel converters. Typically, these PWM methods can be either space-vector or carrier-based implemented, where the carrier-based implementation usually presents a lower computation complexity. In this paper, a novel approach for the carrierbased implementation of different existing PWM methods is proposed for three-and four-level dc-ac converters, which can be easily extended to any number of levels. The main features of the proposed approach are its reduced computation complexity and computation time. On the other hand, the proposed approach suggests the derivation of novel PWM strategies which can potentially present improved performance features. As an example, two new discontinuous PWM (DPWM) strategies are proposed for the four-level converter. One of these DPWM strategies presents lower weighted total harmonic distortion than other previously proposed strategies. Simulation and experimental results verify the effectiveness of the proposed approach and novel DPWM strategies.

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Section: Simplified Procedures To Obtain the Carrier-based Implemenmentioning

confidence: 99%

A Novel Approach to Generate Effective Carrier-Based Pulsewidth Modulation Strategies for Diode-Clamped Multilevel DC–AC Converters

Maheshwari

Busquets‐Monge

Nicolás-Apruzzese

2016

IEEE Trans. Ind. Electron.

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“…In Fig. 2, the boundary condition of , and is defined as or or or (2) It means that when is equal to 1 then and must be zero:…”

Section: A Modeling Of Trilevel Three-phase Four-wired Convertermentioning

confidence: 99%

“…The most popular topology is the three-level inverter. Up to now, many studies have been presented on PWM strategies for three-level inverters including carrier-based sub-oscillation methods [1], [2], harmonics elimination techniques [3], [4], optimal strategies [4], [5], dipolar modulation [6] and space vector PWM [7]. While the multilevel PWM techniques are developed, the two-level PWM methods are extended into multi-level one, such as carrier-based and carrier-less PWM techniques [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Cylindrical coordinate control of three-dimensional PWM technique in three-phase four-wired trilevel inverter

Wong

Tang

Han

2003

IEEE Trans. Power Electron.

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In past decades, almost all the studies are focused in two-dimensional (2-D) PWM techniques on-frame. Recently, four-legs inverter is proposed to compensate the three-phase four-wired system issues. However, three-legs center-split inverter can be applied to compensate the power quality issues including the zero-sequence compensation by the novel PWM technique: three-dimensional (3-D) PWM. In this paper, the mathematical model of shunt-connected three-level power inverter in three-phase four-wired system is studied in-0 frame. The study of 3-D voltage space vector PWM technique in two-level and three-level inverters is performed in rectangular, cylindrical, and spherical coordinates, respectively. The 3DPWM performance indices are proposed. Comparative study of fixed switching sign cubical hysteresis control with this novel proposed technique "cylindrical coordinate control strategy" is accomplished. The results show that the performance of the proposed novel control strategy can overcome the drawbacks of fixed switching sign cubical hysteresis 3DPWM control strategy. Index Terms-3DPWM, three-phase four-wired system, multilevel inverter, power quality.

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“…Regarding studies on zero-sequence voltage, there are reports on improvement of voltage utilization by superimposing three order harmonics [15], reduction of switching loss through two-phase modulation [16,17],suppression of leakage currents [18][19][20], and reduction of harmonics in railcar's return current [21]. In addition, there is a study on balancing control of capacitor voltage during low-speed drive using zero-sequence voltage [22].…”

Section: Introductionmentioning

confidence: 99%

Alleviation Technique for Thermal Concentration on Specific Switching Devices in Zero‐Speed Driving of PMSM

Ayano

Asai

Matsui

2017

Electrical Engineering Japan

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SUMMARY In this paper, a technique is proposed for alleviating the thermal concentration on specific switching devices by using a zero‐sequence voltage in a three‐level inverter that drives a permanent magnet synchronous motor (PMSM) in a zero‐speed and high‐torque condition. The use of the PMSM in home electronics and industrial products has become widespread, since it can realize miniaturization and a high efficiency drive. However, a large DC current flows when the PMSM is used in a zero‐speed and high‐torque condition, for example, in the hill‐start of electric vehicles, start or stop of elevators, or servo lock of servo pressing machines, and so on. In these cases, the current flows in the specific switching devices and heat generation is locally concentrated. This problem is unavoidable in a conventional two‐level inverter. A technique that can change the current path in a three‐level inverter and control the losses generated in the switching devices is proposed. We evaluated the effects of the proposed technique through a circuit simulation in which the electrical characteristics of a commercially available power device were applied. The proposed technique can reduce the highest loss of the switching devices in the three‐level inverter by about 40% as compared to that in a conventional inverter. Moreover, a method is proposed that suppresses the neutral point potential variation between the power supplies. This method can also reduce the maximum loss of the specific switching devices by about 30%.

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Two-phase modulation technique for three-level inverter fed AC drives

Cited by 14 publications

References 8 publications

A Novel Approach to Generate Effective Carrier-Based Pulsewidth Modulation Strategies for Diode-Clamped Multilevel DC–AC Converters

A Novel Approach to Generate Effective Carrier-Based Pulsewidth Modulation Strategies for Diode-Clamped Multilevel DC–AC Converters

Cylindrical coordinate control of three-dimensional PWM technique in three-phase four-wired trilevel inverter

Alleviation Technique for Thermal Concentration on Specific Switching Devices in Zero‐Speed Driving of PMSM

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