Subfundamental Cycle Switching Frequency Variation Based on Output Current Ripple Analysis of a Three-Level Inverter

Bhattacharya, Subhadeep; Sharma, Sourabh Kumar; Mascarella, Diego; Joós, G.

doi:10.1109/jestpe.2017.2712620

Cited by 18 publications

(6 citation statements)

References 33 publications

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“…The output current ripple of 3-L inverters has been investigated in [17][18][19][20], Jiao et al [17] analyses the current ripple of 3-L inverters with the common-mode voltage, but only the maximum current ripple is derived and the distribution of current ripple during the fundamental cycle is not investigated. The current ripple of 3-L inverters is analysed clearly in [18][19][20]. However, the existing research on the current ripple of 3-L inverters is not sufficient because they did not consider the neutral point (NP) balance problem of the T-type and NPC inverter.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of output current ripple of 3‐L inverters is more complicated than 2‐L inverters due to the more complex topology and modulation methods. The output current ripple of 3‐L inverters has been investigated in [17–20], Jiao et al . [17] analyses the current ripple of 3‐L inverters with the common‐mode voltage, but only the maximum current ripple is derived and the distribution of current ripple during the fundamental cycle is not investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The current ripple is closely related to the switching frequency of the 3‐L inverter [27]. Based on the information of current ripple, the switching frequency can be varied to reduce the switching loss and EMI noise [27, 28, 20] explored the variable switching frequency PWM (VSF‐PWM) of 3‐L inverters, but the NP point balancing algorithm is not considered and its influence on the power loss and EMI noise is not investigated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Zhao

Wang

Liu

et al. 2020

IET Power Electronics

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The output current ripple of the three-level (3-L) inverter is important to the performance of the 3-L permanent magnetic synchronous motor (PMSM) drive system, but the neutral point (NP) balance for the 3-L T-type inverter is not considered in the analysis of current ripple up to this point. The NP balance algorithms change the current ripple distribution and it is necessary to develop novel methods for current ripple analysis. In this study, the sinusoidal pulse width modulation with zero-order voltage injection and virtual space vector PWM (VSV-PWM) are utilised to balance the NP potential of the 3-L inverter in the PMSM drive system. The analytical methods of current ripple under these two modulation methods are proposed and the effects of these two NP balance methods on the output current ripple are investigated, respectively. Based on the analysis of current ripple, two variable switching frequency PWM (VSF-PWM) methods considering the NP balance are proposed. The proposed VSF-PWM methods can not only reduce the switching loss but also suppress the electromagnetic interference noise while keeping the NP potential balanced. Especially, the proposed variable switching frequency VSV-PWM (VSF-VSV-PWM) can effectively alleviate the intrinsic problem of high switching loss of VSV-PWM.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Zhao

Wang

Liu

et al. 2020

IET Power Electronics

View full text Add to dashboard Cite

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“…For current ripple analysis, the inductive load can be taken as a leakage inductance circuit, and the cumulative sum of error voltage in a switching cycle will give the magnitude of current ripple [14]. Several methods have been suggested to estimate and reduce the effect of output current ripple for conventional three-phase inverters [15][16][17], which were extended for multiphase [18,19] and multilevel inverters [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Study and analysis of the effects of varied PWM techniques and power sharing ratios on the current ripple in open‐ended, three‐level traction motor drives

Menon

Azeez

Kadam

et al. 2020

IET Electrical Systems in Transportation

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A dual inverter feeding an open-ended motor load is a feasible solution for high-power traction applications. The topology supplied from isolated DC sources has a power-sharing capability. Different pulse width modulation (PWM) techniques have been proposed for the dual inverter. The performance of these modulation schemes can be compared by analysing the current ripple output of the dual inverter drive. There are various methods in the literature to analyse the ripple content in the output current of the dual inverter. However, the existing work on ripple analysis has been done only for equal power sharing between the isolated DC sources. This study presents an output current ripple analysis for carrier-based PWM techniques for different power-sharing ratios. The variation in the current ripple with varied power-sharing ratios for different PWM techniques is demonstrated. The results to validate the analysis have been obtained using MATLAB/Simulink and real-time simulator. Based on the discussion, an optimal PWM technique under different sharing conditions has been identified.

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“…As a crucial player in the control of VSIs, f sw is considered as the main decision variable of the optimization problem [6]. In the literature [7][8][9][10][11], switching frequency was used either to improve the inverter efficiency [7,9] or the quality of the output power [10,11].…”

Section: Introductionmentioning

confidence: 99%

On the Performance Optimization of Two-Level Three-Phase Grid-Feeding Voltage-Source Inverters

2018

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Abstract:The performance optimization of the two-level, three-phase, grid-feeding, voltage-source inverter (VSI) is studied in this paper, which adopts an online adaptive switching frequency algorithm (OASF). A new degree of freedom has been added to the employed OASF algorithm for optimal selection of the weighting factor and overall system optimization design. Toward that end, a full mathematical formulation, including the impact of the coupling inductor and the controller response time, is presented. At first, the weighting factor is selected to favor the switching losses, and the controller gains are optimized by minimizing the integral time-weighted absolute error (ITAE) of the output active and reactive power. Different loading and ambient temperature conditions are considered to validate the optimized controller and its fast response through online field programmable gate array (FPGA)-in-the-loop. Then, the weighting factor is optimally selected to reduce the cost of the L-filter and the heat-sink. An optimization problem to minimize the cost design at the worst case of loading condition for grid-feeding VSI is formulated. The results from this optimization problem are the filter inductance, the thermal resistance of the heat-sink, and the optimal switching frequency with the optimal weighting factor. The VSI test-bed using the optimized parameters is used to verify the proposed work experimentally. Adopting the OASF algorithm that employs the optimal weighting factor for grid-feeding VSI, the percentages of the reductions in the slope of the steady state junction temperature profile compared to fixed frequencies of 10 kHz, 14.434 kHz, and 20 kHz are about 6%, 30%, and 18%, respectively.

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Subfundamental Cycle Switching Frequency Variation Based on Output Current Ripple Analysis of a Three-Level Inverter

Cited by 18 publications

References 33 publications

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Switching frequency variation based on current ripple analysis of a 3‐L PMSM drive system considering neutral point balance

Study and analysis of the effects of varied PWM techniques and power sharing ratios on the current ripple in open‐ended, three‐level traction motor drives

On the Performance Optimization of Two-Level Three-Phase Grid-Feeding Voltage-Source Inverters

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