A Novel Switching Algorithm to Balance Conduction Losses in Power Semiconductor Devices of Multi-level Cascade Inverters

Aghdam, M. G. Hosseini; Fathi, S. H.; Gharehpetian, Gevork B.

doi:10.1080/15325000802258059

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…In the simulation, the switches are assumed ideal. There are several modulation strategies for multilevel converters [23]- [27]. In this paper, the fundamental frequency switching technique has been used.…”

Section: Simulation Resultsmentioning

confidence: 99%

Optimal Topologies for Cascaded Sub-Multilevel Converters

Babaei¹

2010

Journal of Power Electronics

105

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The general function of a multilevel converter is to synthesize a desired output voltage from several levels of dc voltages as inputs. In order to increase the steps in the output voltage, a new topology is recommended in [1], which benefits from a series connection of sub-multilevel converters. In the procedure described in this reference, despite all the advantages, it is not possible to produce all the steps (odd and even) in the output. In addition, for producing an output voltage with a constant number of steps, there are different configurations with a different number of components. In this paper, the optimal structures for this topology are investigated for various objectives such as minimum number of switches and dc voltage sources and minimum standing voltage on the switches for producing the maximum output voltage steps. Two new algorithms for determining the dc voltage sources magnitudes have been proposed. Finally, in order to verify the theoretical issues, simulation and experimental results for a 49-level converter with a maximum output voltage of 200V are presented.

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Section: Simulation Resultsmentioning

confidence: 99%

Optimal Topologies for Cascaded Sub-Multilevel Converters

Babaei¹

2010

Journal of Power Electronics

105

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“…Power losses in the devices are due to conduction [17] and switching [18] phenomena; they cause an increase of the operating temperature of the devices that, in turn, affects their characteristics [19]. Next subsections model the power losses in Si IGBTs, SiC MOSFETs, and freewheeling diodes when inserted in a three-phase inverter that supplies a propulsion motor and calculate the inverter losses in the supply period sup .…”

Section: Supply Period Device Power Lossesmentioning

confidence: 99%

“…Therefore, SiC MOSFET 1 , apart from the dead-times, conducts the phase current even when it is negative and the companion SiC MOSFET 4 of the same leg is off. By substituting (10) in (16) and solving, ,rms is calculated in ,rms = 2 (17) and the conduction losses of SiC MOSFET become…”

Section: Si Igbt Loss Modeling the Conduction Losses Of Si Igbtmentioning

confidence: 99%

“…In particular, for each torque and speed pair, the magnitudes of the motor phase voltage and current and their phase shift have been computed and, from the phase and battery voltages, has been derived. Afterwards, the computed values have been inserted in (11), (12), (17), and (24) to obtain the current magnitudes needed to estimate the conduction losses of transistors and diodes. For the estimation of the switching losses, on and off reported in the data sheets have been adjusted according to the actual amplitude of the phase current, being the losses about proportional to the transistor drain/collector current.…”

Section: Efficiency Estimationmentioning

confidence: 99%

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Quantitative Analysis of Efficiency Improvement of a Propulsion Drive by Using SiC Devices: A Case of Study

Kumar¹,

Bertoluzzo

Buja

et al. 2017

Advances in Power Electronics

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One of the emerging research topics in the propulsion drive of the electric vehicles is the improvement in the efficiency of its component parts, namely, the propulsion motor and the associated inverter. This paper is focused on the efficiency of the inverter and analyzes the improvement that follows from the replacement of the silicon (Si) IGBT devices with silicon carbide (SiC) MOSFETs. To this end, the paper starts by deriving the voltage-current solicitations of the inverter over the working torquespeed plane of the propulsion motor. Then, a proper model of the power losses in the inverter over a supply period of the motor is formulated for the two types of device, including the integrated freewheeling diode. By putting together the voltage-current solicitations and the device power losses, the efficiency maps of the Si IGBT and SiC MOSFET inverters are calculated and compared over the torque-speed plane. The results for the Si IGBT inverter are supported by measurements executed on a marketed C-segment compact electric car, while the SiC MOSFET loss model is validated by an on-purpose built test bench. Finally, the overall efficiency of the propulsion drive is calculated by accounting for the motor efficiency. Main outcomes of the paper is a quantitative evaluation of both the improvement in the efficiency achievable with the SiC MOSFETs and the ensuing increase in the electric car range.

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“…As a result, there is then the need for the allocation of different rated power circuit components and dc sources to respective cascaded cells during the design process; thus, negating the proposed concept of cascading similar inverter cells with the same characteristics and power capabilities. Works done in [45] and [46] proposed switching strategies to balance the switching loss dissipation among the four switches in a given cell but not in all the constituting power switches of the cascaded system. Based on these technical backgrounds, this paper presents a control strategy, based on the single-carrier multilevel modulation technique, [47], which ensures equal power handling capability in CHB multilevel inverter modules.…”

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confidence: 99%

Hybrid Modulation Scheme for Cascaded H-Bridge Inverter Cells

Odeh¹

2014

Nig. J. Tech.

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ABSTRACT ABSTRACT ThisThis This This work work work work proposes a switching technique for cascaded proposes a switching technique for cascaded proposes a switching technique for cascaded proposes a switching technique for cascaded (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM circulation schemes are presented for this circulation schemes are presented for this circulation schemes are presented for this circulation schemes are presented for this conce conce conce concepts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in inverter modules; and therefore tec inverter modules; and therefore tec inverter modules; and therefore tec inverter modules; and therefore technically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value waveform of the exemplanary 4 waveform of the exemplanary 4 waveform of the exemplanary 4 waveform of the exemplanary 4----cell cascaded configuration. With these pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts...

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A Novel Switching Algorithm to Balance Conduction Losses in Power Semiconductor Devices of Multi-level Cascade Inverters

Cited by 6 publications

References 19 publications

Optimal Topologies for Cascaded Sub-Multilevel Converters

Optimal Topologies for Cascaded Sub-Multilevel Converters

Quantitative Analysis of Efficiency Improvement of a Propulsion Drive by Using SiC Devices: A Case of Study

Hybrid Modulation Scheme for Cascaded H-Bridge Inverter Cells

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