Power Decoupling Technique for Reducing DC-Link Capacitor of Switched Reluctance Machine Drive

Haque, Ehsanul; Chowdhury, Anik; Sözer, Yilmaz

doi:10.1109/ecce.2019.8912922

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…From the analysis used in (8), it can be seen that the current demanded by the inverter is decomposed by a DC component plus a sum of carrier harmonic and side-bands harmonic components. These carrier harmonic components are highly influenced by the operational condition of the drive inverter, that is, the magnitude of the coefficients A mn and B mn is determined by the fundamental output current, as well as the resulting power factor (i.e., the active and reactive powers).…”

Section: Harmonic Analysis Of the Current Demanded By The Invertermentioning

confidence: 99%

“…Many different hardware topologies have been discussed to achieve a current ripple reduction for the DC-link in different areas [6][7][8][9][10][11][12][13][14][15]. Owing to the requirement for highly constrained systems with low volume and low weight, ref.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, different systems require different DC capacitor tanks, thus the cost could not be ignored. Consequently, adding one more power conversion stage between the battery and the inverter is explored as the highest adoption technique to balance the current energy of the DC-link [7][8][9][10][11][12][13][14][15]. The method utilizes a back-to-back converter containing a rectifier and an inverter, which could reduce the capacitor harmonic current when the pulsed DC-link current of the rectifier and inverter are synchronized [7].…”

Section: Introductionmentioning

confidence: 99%

“…A bidirectional buck-boost converter is operated as a power decoupling stage to handle the harmonic content of the DC-link. This system increases the complexity, and some instability is caused by the difference between the stored and released energy of the decoupling capacitor [8]. In [9], an active power filter is added to a three-phase traction system and the capacitor of the DC-link is decreased from 2200 µF to 100 µF.…”

Section: Introductionmentioning

confidence: 99%

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Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation

et al. 2023

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This paper investigates the influence of a constant carrier phase shift on the DC-link capacitor harmonic current of cascaded converters used in fuel-cell and mild-hybrid electric vehicles. In these applications, a DC-DC converter can be adopted between the battery and the motor drive inverter in a cascaded structure, where the two converters share the same DC-link. Since the DC-link capacitor of such a system represents a critical component, the optimization of the converter operation to limit the current stress and extend the lifetime of the capacitor is an primary objective. This paper proposes the use of a carrier phase shift between the modulations of the two converters in order to minimize the harmonic current of the DC-link capacitor. By harmonic analysis, an optimal carrier phase shift can be derived depending on the converter configuration. Analytical results are presented and validated by hardware-in-the-loop experiments. The findings show that the pulse width modulation carrier phase shift between the interleaved boost converter and the voltage source motor drive inverter has a significant influence on the DC-link capacitor current and thus on its lifetime. A case study with two-cell and three-cell interleaved boost converters shows a possible DC-link capacitor lifetime extension of up to 390%.

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Section: Harmonic Analysis Of the Current Demanded By The Invertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation

et al. 2023

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“…[24] validates a dc-dc boost converter to reduce the size of the capacitor by actively filtering the current. In [25] a bidirectional cascaded buck-boost converter is used in parallel to the SRM drive to filter the ripple current, thus allowing to reduce the capacitor size. And [26] presents a quasi-Z-source integrated multiport converter to reduce the DC-link capacitor.…”

Section: Introductionmentioning

confidence: 99%

Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

et al. 2020

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Switched Reluctance Machines (SRM) are emerging as a possible alternative in terms of cost and supply stability to rare earth based electric vehicle traction systems. However, because of the huge amounts of energy stored and transferred back and forth between the DC source and the SRM, large DC-link capacitors must be used as buffers, which increases overall costs and size. This paper proposes a novel modulation technique which forces the exchange of energy between phases while decreasing the energy transfer between the DC bus and the SRM. This means lower DC bus currents (capacitor size and cost reduction) and lower Joule-effect conduction losses (better efficiency). The proposed modulation has been validated experimentally in a test bench and compared with the conventional torque-sharing function. INDEX TERMS Switched reluctance motors, motor current control, inverter modulation, capacitor current reduction.

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Current Profile Optimization Method for Simultaneous DC-Link Current Ripple and Acoustic Noise Minimization in Switched Reluctance Machines

Gundogmus

Haque

Vadamodala

et al. 2020

2020 IEEE Energy Conversion Congress and Exposition (ECCE)

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Power Decoupling Technique for Reducing DC-Link Capacitor of Switched Reluctance Machine Drive

Cited by 11 publications

References 11 publications

Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation

Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation

Synchronized Switching Modulation to Reduce the DC-Link Current in SRM Drives

Current Profile Optimization Method for Simultaneous DC-Link Current Ripple and Acoustic Noise Minimization in Switched Reluctance Machines

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