Subfundamental Cycle Switching Frequency Variation for Switching Losses Reduction of a Two-Level Inverter Traction Drive

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

doi:10.1109/tte.2017.2695576

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…Zero vectors can be used for modulation if the EMI radiation energy is not the core concern. A hybrid modulation method of three modulation methods can be employed within one electrical fundamental period T e = 2 π / ω e [26]. The flux linkage ripple

{\increment}{\psi }^{\mathit{rms}}

of the first sector's SVPWM, DPWM012, and DPWM721 modulation methods can be plotted in a cylindrical coordinate system, as illustrated in Figure 9.…”

Section: Hybrid Spread Spectrum Pulsewidth Modulationmentioning

confidence: 99%

A novel programmed hybrid modulation for electromagnetic interference mitigation and current ripple control in miniaturised synchronous machine drives

Ma,

Li,

Fan

et al. 2024

IET Electric Power Appl

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A novel programmed hybrid spreading spectrum modulation method to mitigate electromagnetic interference (EMI) emission and bearing current in the context of miniaturised and lightweight synchronous machine drives is proposed. The proposed method adopts the combination of conventional pulsewidth modulation (PWM) and low common mode voltage PWM. The offline look‐up table for switching frequency is acquired by analysing the root mean square voltage values at different modulation indices and angles. By adjusting the switching frequency according to this table, the spectrum can be spread into the sidebands of the switching frequency, and the harmonic spike can be suppressed. To address the challenge of increased current ripple and harmonic distortion in high torque density motors under overload conditions, a motor model that considers the cross‐saturation and slotting effect is presented. This motor model is used to derive the switching frequency correction factors, aiming to mitigate the influence of saturation and slotting effect on harmonic amplification. The proposed method is well‐suited for controlling synchronous motors using three‐phase two‐level voltage source inverters. The simulation and experimental results validate the effectiveness of the proposed method, showcasing its advantages in terms of computational complexity reduction and significant attenuation of peak EMI currents.

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{\increment}{\psi }^{\mathit{rms}}

of the first sector's SVPWM, DPWM012, and DPWM721 modulation methods can be plotted in a cylindrical coordinate system, as illustrated in Figure 9.…”

Section: Hybrid Spread Spectrum Pulsewidth Modulationmentioning

confidence: 99%

A novel programmed hybrid modulation for electromagnetic interference mitigation and current ripple control in miniaturised synchronous machine drives

Ma,

Li,

Fan

et al. 2024

IET Electric Power Appl

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show abstract

“…However, the suppression of EMI effect depends on waveform characteristics. For reducing the switching losses and maintaining the peak-peak current ripple within a preset limit, Bhattacharya et al (2017) presented a switching-frequency variation scheme. Instead of depending on optimisation or prediction methods, the proposed technique uses pre-computed switching-frequency variation factors.…”

Section: Switching-loss Reduction In Linear and Over-modulation Zones...mentioning

confidence: 99%

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Chattejee,

Chakraborty,

Dalapati

2023

Power Electronics and Drives

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The core of most power electronic systems involving DC/AC conversion is a voltage source inverter (VSI) that runs on some pulsewidth modulation (PWM) strategy. Numerous PWM techniques have been reported in the literature over the past few decades, each having its own merits and limitations. This paper reviews some selected areas of two-level PWM VSI, namely proper utilisation of the DC bus without deteriorating the quality of the output waveform, switching-loss reduction in the linear and over-modulation zones, common-mode voltage and PWM strategies for its reduction or elimination, distortion of the output voltage owing to dead time, and its compensation. These phenomena are explained in brief, followed by discussions on different research works relevant to these areas, and their advantages and disadvantages. Finally, the paper shows prospective directions in which research may continue in these areas in future.

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“…For all the previous dependencies to be considered, 3D-curve fitting techniques are used for energy losses to be expressed based on the parameters above. With the use of the surface fitting, the turn-on and the turn-off energy losses (E on and E o f f ) are expressed in terms of i c and T jQ , as shown in Figure 6 and Equations (15) and (16). After that, the derived equations must be scaled to include the effect of a specific R g,on , R g,o f f and V dc as in Equations (17) and (18):…”

Section: Switching Lossesmentioning

confidence: 99%

“…Those Figure 6 and Equations (15) and (16). After that, the derived equations must be scaled to include the effect of a specific (17) and (18): …”

Section: Switching Lossesmentioning

confidence: 99%

Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters

et al. 2017

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Enhancing the performance of the voltage source inverters (VSIs) without changing the hardware structure has recently acquired an increased amount of interest. In this study, an optimization algorithm, enhancing the quality of the output power and the efficiency of three-phase grid connected VSIs is proposed. Towards that end, the proposed algorithm varies the switching frequency (f sw ) to maintain the best balance between switching losses of the insulated-gate-bipolar-transistor (IGBT) power module as well as the output power quality under all loading conditions, including the ambient temperature effect. Since there is a contradiction with these two measures in relation to the switching frequency, the theory of multi-objective optimization is employed. The proposed algorithm is executed on the platform of Altera ® DE2-115 field-programmable-gate-array (FPGA) in which the optimal value of the switching frequency is determined online without the need for heavy offline calculations and/or lookup tables. With adopting the proposed algorithm, there is an improvement in the VSI efficiency without degrading the output power quality. Therefore, the proposed algorithm enhances the lifetime of the IGBT power module because of reduced variations in the module's junction temperature. An experimental prototype is built, and experimental tests are conducted for the verification of the viability of the proposed algorithm.

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Subfundamental Cycle Switching Frequency Variation for Switching Losses Reduction of a Two-Level Inverter Traction Drive

Cited by 10 publications

References 26 publications

A novel programmed hybrid modulation for electromagnetic interference mitigation and current ripple control in miniaturised synchronous machine drives

A novel programmed hybrid modulation for electromagnetic interference mitigation and current ripple control in miniaturised synchronous machine drives

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Online Optimal Switching Frequency Selection for Grid-Connected Voltage Source Inverters

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