Dynamic model and control of wound-rotor machine in single-phase grid system

Lee, Kahyun; Han, Yongsu; Ha, Jung‐Ik

doi:10.1109/apec.2014.6803689

Cited by 3 publications

(6 citation statements)

References 24 publications

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“…8. There are disconnected lines because the desired torque cannot be generated at certain speeds, which can be explained by the operating areas analyzed in [16]. As shown in Fig.…”

Section: B DC Link Voltage Controlmentioning

confidence: 98%

“…3, where the subscript 'r' means the rotor, V d and V q are d-and q-axis voltages, λ d and λ q are d-and q-axis fluxes, R s and R r are stator and rotor resistances, L ls and L lr are stator and rotor leakage inductances, L m is the mutual inductance, and ω r is electrical rotating speed. The q-axis stator circuit is eliminated because there is no current flow [16]. Nevertheless, there is q-axis magnetic flux in the stator like a virtual magnetic pole, which contributes to generating the torque.…”

Section: A Configuration Of the Proposed Systemmentioning

confidence: 98%

“…Also, the grid power, P g , is equal to the stator power as follows. where λ dsc and λ dss are the cosine and sine components of the d-axis stator flux which can be estimated from the grid voltage [16]. From (4), the reactive power becomes zero in the following condition.…”

Section: B Characteristics Of the Proposed Systemmentioning

confidence: 99%

“…Recently, a novel wound-rotor machine has been proposed in [16], which is called Single-phase Stator and Three-phase Wound Rotor Machine (SSTWRM). As illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Minimum copper loss control of a single-phase grid-connected wound rotor machine over full speed range

Lee

Han

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper proposes control algorithms for the minimum copper loss (MCL) operation of a single-phase gridtied wound rotor machine. The wound rotor machine, which has a single-phase winding in the stator and three-phase windings in the rotor, has been proposed as an attractive alternative of the conventional ac machines in single-phase grid system. In the proposed system, the stator winding is directly fed by the single-phase grid while the rotor windings are connected to an isolated three-phase inverter for the variable speed operation. Characteristics of the system were analyzed based on the machine model, and the condition of the minimum copper loss (MCL) operation was derived in the entire speed range. For tracking of the MCL operating point, the proposed method adjusts the ratio between rotor current variables while power factor of the grid, speed, and dc link voltage are simultaneously controlled. The feasibility and MCL tracking performance of the proposed control system were verified by experiments under various operating conditions.

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“…8. There are disconnected lines because the desired torque cannot be generated at certain speeds, which can be explained by the operating areas analyzed in [16]. As shown in Fig.…”

Section: B DC Link Voltage Controlmentioning

confidence: 98%

Section: A Configuration Of the Proposed Systemmentioning

confidence: 98%

Section: B Characteristics Of the Proposed Systemmentioning

confidence: 99%

“…Recently, a novel wound-rotor machine has been proposed in [16], which is called Single-phase Stator and Three-phase Wound Rotor Machine (SSTWRM). As illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Minimum copper loss control of a single-phase grid-connected wound rotor machine over full speed range

Lee

Han

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

Self Cite

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“…However, low-altitude remote sensing operations are bound to affect the ground crops because of the rotor wind field. The UAV rotor wind field [6][7][8][9][10] is formed by the rotation of the rotor to promote the air flow in the crop canopy. The distribution of the wind field is often related to the flight parameters of the drone, the surrounding environment, and the distribution of the ground sensor, which is a multi-factor parameter.…”

Section: Introductionmentioning

confidence: 99%

Wind Field Distribution of Multi-rotor UAV and Its Influence on Spectral Information Acquisition of Rice Canopies

Liu

Wang

et al. 2019

Remote Sensing

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Unmanned aerial vehicles (UAV) are widely used as remote sensing platforms to effectively monitor agricultural conditions. The wind field generated by the rotors in low-altitude operations will cause the deformation of rice crops, and may affect the acquisition of the true spectral information. In this study, a low-altitude UAV remote sensing simulation platform and a triple-direction wind field wireless sensor network system were built to explore the wind field distribution law. Combined with the multi-spectral images of the rice canopy, the influence of wind field on the spectral information acquisition was analyzed through variance and regression analysis. The results showed that the Z-direction wind field of UAV rotors dominated along three directions (X, Y, and Z). The coefficient of determination (R2) of three linear regression models for Normalized Difference Vegetation Index (NDVI), Ratio Vegetation Index (RVI), and Canopy Coverage Rate (CCR) was 0.782, 0.749, and 0.527, respectively. Therefore, the multi-rotor UAV wind field had an impact on the spectral information acquisition of rice canopy, and this influence could eventually affect the assessment of rice growth status. The models established in this study could provide a reference for the revised model of spectral indices, and offer guidance for the actual operations of low-altitude multi-rotor UAV.

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Single-phase to three-phase generation system based on doubly-fed induction generator

Rocha

Oliveira

Silva

et al. 2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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Dynamic model and control of wound-rotor machine in single-phase grid system

Cited by 3 publications

References 24 publications

Minimum copper loss control of a single-phase grid-connected wound rotor machine over full speed range

Minimum copper loss control of a single-phase grid-connected wound rotor machine over full speed range

Wind Field Distribution of Multi-rotor UAV and Its Influence on Spectral Information Acquisition of Rice Canopies

Single-phase to three-phase generation system based on doubly-fed induction generator

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