Zero-Speed Operation of High-Power PWM Current-Source-Inverter-Fed Induction Motor Drive

Liu, Fangrui; Wu, Bin; Pande, Manish; Zargari, Navid R.

doi:10.1109/tpel.2011.2176542

Cited by 22 publications

(4 citation statements)

References 25 publications

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“…This approach can reduce the size of capacitors and thus improve the system's overall lifetime. A simple solution to compensate for the filter effect on the magnitude and angle of the current is to employ an observer, which is introduced in [39] for motor drive applications.…”

Section: Effect Of Filtering Capacitorsmentioning

confidence: 99%

Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Salem

Narimani

2023

IEEE Access

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This paper proposes a new and straightforward method to extend the modulation range of the six-phase cascaded current source inverter (CSI). The proposed technique employs vector space decomposition (VSD) to mitigate the inverter current harmonics and extend the linear modulation region by about 8%. For motor drive applications, increasing the fundamental output component can reflect higher torque production capability for the same drive size, given that thermal limits are not exceeded. The extension can be realized by injecting optimized xy harmonics while keeping the amplitude of the resulting phase currents under the maximum value. The method utilizes a look-up table of optimized values of the injected harmonics to extend the modulation range. The output filter capacitor effects are also studied in this paper, and a selection approach is introduced. Finally, the experimental results of a C-CSI laboratory prototype are presented and discussed to verify the feasibility of the proposed modulation technique.INDEX TERMS Multiphase systems, current-source inverters (CSI), space vector modulation (SVM), power quality. AHMED SALEM (Graduate Student Member, IEEE) received the B.Sc. (Hons.

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Section: Effect Of Filtering Capacitorsmentioning

confidence: 99%

Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Salem

Narimani

2023

IEEE Access

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“…But, during the high-speed operation, the FBSM-MMC works the same as HBSM-MMC, which might make the design costly. However, the proposed system is devoted to zero-speed/low-speed medium-voltage drive applications such as cranes, scraper conveyors, hoists, rolling mills, tractions, and internal mixers (high-torque capability with starting and/or low-speed operation) [29]- [31], (ii) the proposed architecture provides successful operation at low-frequency conditions with lower current stresses on the involved semiconductor devices compared to the conventional HBSM-MMC converter with high-frequency circulating current injection method, but with a higher number of employed switches. In order to highlight that, a comparison between the performance of the aforementioned two options during low-frequency operation is presented in the simulation section.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Modular Multilevel Converter With Arm-Interchange Concept for Zero-/Low- Frequency Operation of AC Drives

et al. 2020

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DC-AC Modular Multilevel Converter (MMC) is a promising candidate for high-power AC drive applications. The main challenge of operating the MMC in AC drive applications is its performance during low-frequency conditions, as high voltage ripple is associated with the low-frequency operation, which results in voltage stresses on the involved semiconductor devices. To keep capacitor voltages balanced and bounded in low-frequency operation, different techniques have been proposed in literature, which can be classified into software and hardware approaches. In this paper, a hybrid MMC with arm-interchange concept is proposed to ensure operating successfully during low-frequency conditions. The hybrid MMC consists of two-stages. The first stage is a front-end Integrated Gate Commutated Thyristor (IGCT)-based H-bridge converter, while the second stage is a Full-Bridge Sub-Module (FBSM)-based MMC, where FBSMs is able to generate positive, zero, and negative voltage states. Detailed illustration and design of the hybrid MMC are introduced. Simulation results of the proposed converter are presented to show the effectiveness during low-frequency and normal frequency conditions in AC drive applications. Finally, a scaled-down prototype is employed for experimental validation.

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“…However, it cannot eliminate errors completely. Combining FFC with FBC to form a two-degree-of-freedom controller is a feasible solution for the improved transient performance (Li et al, 2012;Liu et al, 2012). However, implementation of the FFC requires an accurate system model.…”

Section: Introductionmentioning

confidence: 99%

Accurate and fast-response magnetically suspended flywheel torque control

Zhou

Zhang

Fang

2015

Transactions of the Institute of Measurement and Control

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The run-out of a magnetically suspended flywheel (MSFW) rotor invokes speed fluctuation. It is found that the fluctuation alters sinusoidally and synchronously with the rotor rotational frequency, and its amplitude is proportional to the value of the rotor speed, which is different from conventional disturbance. A real-time speed correction method is proposed in this paper to suppress the fluctuation. In addition, the general disturbances in MSFWs have been suppressed by the designed acceleration-based disturbance observer (DOB). It is worth noting that the DOB developed here does not contain a pure derivative, although it is a common problem in the realization of most DOBs. Furthermore, system transient performance is improved by the designed command feedforward controller (FFC). Finally, accurate and fast-response flywheel torque can be obtained.

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Zero-Speed Operation of High-Power PWM Current-Source-Inverter-Fed Induction Motor Drive

Cited by 22 publications

References 25 publications

Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Hybrid Modular Multilevel Converter With Arm-Interchange Concept for Zero-/Low- Frequency Operation of AC Drives

Accurate and fast-response magnetically suspended flywheel torque control

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