Fast Torque Control and Minimized Sector-Flux Droop for Constant Frequency Torque Controller Based DTC of Induction Machines

Alsofyani, Ibrahim Mohd; Bak, Yeongsu; Lee, Kyo‐Beum

doi:10.1109/tpel.2019.2908631

Cited by 29 publications

(27 citation statements)

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“…The selection of PI parameters can be carried out using the same procedure in [24], yet the whole peak of the carriers should be taken into account for the selection of PI gains. In principle, the output of the proposed interleaving-carrier-based CFTR is like that of a conventional controller [20], which can be either one of three states: 1, 0, or -1.…”

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“…Nevertheless, it still suffers from sector-flux droop and poor torque dynamic performance. In [24], CFTR-DTC with interleaving carriers was reported to improve the CFTR at the low-speed range. The configuration of the controller is like the conventional CFTR; yet, the method needs two carrier waveforms with a 90 • phase shift for the upper and lower sides.…”

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confidence: 99%

“…The configuration of the controller is like the conventional CFTR; yet, the method needs two carrier waveforms with a 90 • phase shift for the upper and lower sides. However, the CFTR rules in [24] were only limited for the low-speed region because of the large torque ripple.In this study, the interleaving triangular waveforms are also used to replace the conventional single carrier in the CFTR-DTC of an induction machine (IM). Unlike the work in [24], CFTR-DTC with interleaving carriers is investigated in simulation and experimentation for all speed regions by including all the controller rules.…”

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confidence: 99%

“…However, the CFTR rules in [24] were only limited for the low-speed region because of the large torque ripple.In this study, the interleaving triangular waveforms are also used to replace the conventional single carrier in the CFTR-DTC of an induction machine (IM). Unlike the work in [24], CFTR-DTC with interleaving carriers is investigated in simulation and experimentation for all speed regions by including all the controller rules. Moreover, various frequencies of interleaving carriers were investigated in the experimental implementation considering the discrete nature of DSP.The rest of this work contains the following sections.…”

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Evaluation of Direct Torque Control with a Constant-Frequency Torque Regulator under Various Discrete Interleaving Carriers

Alsofyani

Lee

2019

Electronics

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Constant-frequency torque regulator-based direct torque control (CFTR-DTC) provides an attractive and powerful control strategy for induction and permanent-magnet motors. However, this scheme has two major issues: A sector-flux droop at low speed and poor torque dynamic performance. To improve the performance of this control method, interleaving triangular carriers are used to replace the single carrier in the CFTR controller to increase the duty voltage cycles and reduce the flux droop. However, this method causes an increase in the motor torque ripple. Hence, in this work, different discrete steps when generating the interleaving carriers in CFTR-DTC of an induction machine are compared. The comparison involves the investigation of the torque dynamic performance and torque and stator flux ripples. The effectiveness of the proposed CFTR-DTC with various discrete interleaving-carriers is validated through simulation and experimental results.Electronics 2019, 8, 820 2 of 15 and constraints. Generally, PTC strategies, although helping to address the problem, are associated with some issues such as the increase in total harmonic distortion and a high computational burden [11].Lately, interest has increased in using DTC with a constant-frequency torque regulator (CFTR-DTC) in AC motor drives [18][19][20][21][22][23]. The DTC-CFTR was initially created for achieving a constant switching frequency of inverters and a reduction of torque and flux ripples [18]. Unlike the DTC-SVM and MPC methods, there is a possibility to solve the stated DTC problems by applying CFTR in the basic configuration of classical DTC while maintaining the simple DTC algorithm. To date, only a handful of studies have been reported to address these problems in the CFTR. Some studies of DTC-CFTR have applied it in multilevel-based DTC (ML-DTC), such as three-level [19] and five-level [20] systems. They can provide a higher degree of freedom in control to obtain smoother torque and flux responses and to lead to a torque ripple reduction. In previous work [21], an over modulation method was proposed to enhance CFTR-DTC by retaining a single active-voltage vector during the torque transient. In other work [22], the digital signal processor (DSP) board was extended using a field programmable gate array controller to generate a higher carrier frequency, thus achieving a further reduction of the torque ripple. Nevertheless, this work requires extending extra software and an external controller to the drive system. In other research [23], CFTR-DTC has been investigated for low-speed operation showing satisfactory performance in terms of flux regulation improvement. Nevertheless, it still suffers from sector-flux droop and poor torque dynamic performance. In [24], CFTR-DTC with interleaving carriers was reported to improve the CFTR at the low-speed range. The configuration of the controller is like the conventional CFTR; yet, the method needs two carrier waveforms with a 90 • phase shift for the upper and lower sides. However, the CFTR rules in [24] were ...

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Evaluation of Direct Torque Control with a Constant-Frequency Torque Regulator under Various Discrete Interleaving Carriers

Alsofyani

Lee

2019

Electronics

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Indirect field‐oriented control of star‐connected three‐phase induction machine drives against single‐phase open‐circuit fault

Tabasian

Ghanbari

Esmaeli

et al. 2021

Int Trans Electr Energ Syst

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The present study aims to propose an indirect field-oriented control (IFOC) strategy for star-connected three-phase induction machine (SCTPIM) drives against singlephase open-circuit fault. In the proposed IFOC method, transformation matrices (TMs) are applied to the faulty SCTPIM equations. Based on the results, the asymmetrical equations of the faulty SCTPIM can be transformed into symmetrical equations by using these matrices. The symmetrical equations have structures which are similar to healthy SCTPIM equations. Thus, a midfield IFOC strategy could be shared during both normal and open-phase fault operations. The performance of the proposed control system was confirmed based on the simulations and experiments for a vector controlled 0.75 kW SCTPIM drive. The results confirmed the effectiveness of the introduced controller in the speed and torque ripples decreasing of the faulty SCTPIM and eliminating the unbalances in the faulty SCTPIM currents.

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Torque control-based induction motor speed control using Anticipating Power Impulse Technique

Karupusamy

Mustafa

Jos³

et al. 2023

Int J Adv Manuf Technol

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In this model the induction motor speed controlis based on torque control drive is analysis the output power using Anticipating Power Impulse Technique (APIT). Induction motors are used in various applications, this is a model of a motor used in constant speed applications. Vibrations and singularities are eliminated with the sliding mode control of conventional terminals. In this method, the reference state is determined in a systematic manner so that the maximum torque per ampere and ux limiting operation and the reference torque tracking can be determined. The di culty of a controller driver is choosing a switch with the proper control scheme to achieve dynamic and steady state response speed requirements and the proposed method is completely varied from conventional model. AnAnticipating Power Impulse Technique (APIT)is the proposed systemto the induction motor drive is control it is also applied to be speed control of the motor. The system presented here analyses motor current and rotor position, which helps to obtain a suitable switching pulse diver circuit. Because of low switching loss speed control. In this system, MATLAB software is used to develop control circuit simulations. It is expected that the simulation output will reduce the torque ripple veri ed by experiments and Anticipating Power Impulse Technique(APIT), giving the system output excellent stability.

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Fast Torque Control and Minimized Sector-Flux Droop for Constant Frequency Torque Controller Based DTC of Induction Machines

Cited by 29 publications

References 29 publications

Evaluation of Direct Torque Control with a Constant-Frequency Torque Regulator under Various Discrete Interleaving Carriers

Evaluation of Direct Torque Control with a Constant-Frequency Torque Regulator under Various Discrete Interleaving Carriers

Indirect field‐oriented control of star‐connected three‐phase induction machine drives against single‐phase open‐circuit fault

Torque control-based induction motor speed control using Anticipating Power Impulse Technique

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