DTC of Induction Motor Drives Fed By Two and Three-Level Inverter: Modeling and Simulation

Jnayah, Salma; Khedher, Adel

doi:10.1109/sta.2019.8717227

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…where r S and L are the stator resistance and inductance, respectively.ϕ is the flux of the permanent magnet. More information about PMSM is provided in the study by Jnayah and Khedher (2019). The parameters of the PMSM motor used in this work are shown in Table 2.…”

Section: Hev Traction and Control 41 Hev Tractionmentioning

confidence: 99%

Secure power management strategy for direct torque controlled fuel cell/ supercapacitor electric vehicles

et al. 2022

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High reliability is recommended in hybrid electric vehicle applications. In this study, a secure power management strategy has been developed for a fuel cell—supercapacitor hybrid electric vehicle. In addition to its ability to detect the occurrence of failures in vehicle power sources, the proposed power management strategy isolates the faulty source and reconfigures the control scheme to always guarantee bus voltage stability and vehicle traction even in faulty situations. The developed power management strategy enhances vehicle comfort and prevents exhausting one source over another by allowing the fuel cell and the supercapacitor to operate at different power levels. The multiloop control scheme associated with the power sources is highly reliable since both sources can run the vehicle alone and regulate the bus voltage. Vehicle speed and torque controllers are simultaneously tuned using a particle swarm optimization algorithm. Torque and speed ripples are automatically minimized via the use of a new proposed cost function. This approach made the controller design easier and gave the designer the possibility to tradeoff between the variables to be minimized.

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Section: Hev Traction and Control 41 Hev Tractionmentioning

confidence: 99%

Secure power management strategy for direct torque controlled fuel cell/ supercapacitor electric vehicles

et al. 2022

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“…Figure 1 depicts the overall structure of the classical DTC. This strategy consists of the direct determination of the command sequence that will be applied to the switches of the VSI-fed machine (Jnayah, and Khedher, 2019). The command values of the stator flux and torque are compared with their estimated ones.…”

Section: Direct Torque Control Of Induction Motor Drivementioning

confidence: 99%

Sensorless DTC-SVM applied to an induction motor controlled by a three-level inverter using SMSFO

Jnayah

Khedher

2022

COMPEL

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Purpose The direct torque control (DTC) of induction motor (IM) drive is featured by high ripples in the electromagnetic torque and stator flux profiles because they are controlled by two hysteresis regulators. Furthermore, the machine flux is not directly measurable. Hence, it is better to reconstitute it from the instantaneous electrical equations of the machine. Once the stator flux is estimated, we can guarantee a reliable sensorless DTC control. Thus, the purpose of this research work is to ensure fast response and full reference tracking of the IM under sensorless DTC strategy with desired dynamic behavior and low ripple levels. Design/methodology/approach In this work, an improved DTC strategy, which is DTC_SVM_3L, is suggested. The first step of the designed approach is to substitute the conventional inverter feeding the motor with a three-level inverter because it guarantees reduced switching losses, improved quality of voltage waveform and low-current total harmonic distortion rate. The second aim of this paper is to make the IM operate at a constant switching frequency by using the nearest three vectors-based space vector modulation (SVM) technique rather than hysteresis controllers. The third objective of this study is to conceive a sliding-mode stator flux observer, which can improve the control performances by using a sensorless algorithm to get an accurate estimation, and consequently, increase the reliability of the system and decrease the cost of using sensors. The stability of the proposed observer is demonstrated based on the Lyapunov theory. To overcome the load change disturbance in the proposed DTC control strategy, this paper exhibits a comparative assessment of four speed regulation methods: classical proportional and integral (PI) regulator, fuzzy logic PI controller, particle swarm optimization PI controller and backstepping regulator. The entire control algorithm was tested under different disturbances such as stator resistance and load torque variations. Findings It was ascertained that the IM, controlled with three-level inverter, exhibits good performances under the proposed DTC-SVM strategy based on a sliding-mode observer. The robustness of the suggested approach against parameter variations is also proved. Originality/value The theoretical development of the proposed control strategy is thoroughly described. Then, simulations using Matlab/Simulink software are launched to investigate the merits of the sensorless DTC-SVM command of three-level inverter-fed IM drive with different speed regulators.

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“…The fundamental concept of the DTC approach, as originally introduced in the 1980s, is based on the direct and independent control of both stator flux and electromagnetic torque through selecting a suitable voltage vector that should be applied to the inverter switches [21]. The basic scheme of this control strategy is illustrated in Figure 1.…”

Section: Dtc Principlementioning

confidence: 99%

IM Fed by Three-Level Inverter under DTC Strategy Combined with Sliding Mode Theory

2022

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The classical direct torque control (CDTC) of the induction motor (IM) drive is characterized by high ripples in the stator flux and the electromagnetic torque waveforms due to the use of hysteresis comparators. Furthermore, the motor speed in this control strategy is ensured through a proportional integral (PI) regulator, due to its simple structure. Nonetheless, this controller is sensitive to load disturbances. Hence, it is not robust against parameter variance, which can degrade the motor performance. To overcome this deficiency, many endeavors have been conducted in the literature to ensure a high dynamic response of the motor in all speed ranges, with minimum flux and torque undulations. Thus, the DTC of an IM associated with a three-level inverter based on sliding mode (SM) flux, torque and speed controllers was adopted to substitute the hysteresis comparators and the traditional PI regulator, since the SM speed controller is able to prevail against external disturbances. The second contribution of this manuscript is to develop the proposed DTC_SM approach using the Xilinx System Generator (XSG) in order to implement it on a field programmable gate array (FPGA) Virtex 5 on account of its ability to adopt parallel processing. The hardware co-simulation results verify clearly the merits of the suggested modified DTC strategy.

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DTC of Induction Motor Drives Fed By Two and Three-Level Inverter: Modeling and Simulation

Cited by 13 publications

References 7 publications

Secure power management strategy for direct torque controlled fuel cell/ supercapacitor electric vehicles

Secure power management strategy for direct torque controlled fuel cell/ supercapacitor electric vehicles

Sensorless DTC-SVM applied to an induction motor controlled by a three-level inverter using SMSFO

IM Fed by Three-Level Inverter under DTC Strategy Combined with Sliding Mode Theory

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