Deadbeat-Direct Torque and Flux Control for Wound Field Synchronous Machines

Nie, Yi-Hang; Brown, Ian; Ludois, Daniel C.

doi:10.1109/tie.2017.2739696

Cited by 29 publications

(15 citation statements)

References 20 publications

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“…With the development of microelectronics technology, power electronics technology, motor technology and control theory, DC motor, double-fed motor, AC asynchronous motor, permanent magnet synchronous motor (PMSM) and electrically excited synchronous motor (EESM) are widely used in high-power applications. Different types of motors have different characteristics as shown in Table . Among these main types of motor, the EESM discussed in this paper is widely used in mine hoist, transportation, oil rig, steel rolling mill and ship propulsion for its high efficiency and strong overload capability [1][2][3][4][5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Magnetic Field Vector Control With Dynamic-Variant Parameters for High-Power Electrically Excited Synchronous Motor

Han

Wu²,

et al. 2020

IEEE Trans. Power Electron.

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Identifying the air-gap flux is a prerequisite for realizing the decoupling control between air-gap flux and torque in an electrically excited synchronous motor (EESM) vector control system. For the nonlinear problem of EESM, the frequency response function method is introduced to analyze the air-gap flux voltage and current models' sensitivity to the motor parameters in this paper. A dynamic air-gap current model for EESM based on the equivalent reaction inductance is proposed to solve the parameter dynamic-variant problem caused by the nonlinear magnetic distribution of the EESM. Meanwhile, the comparative analysis of effectiveness caused by linear and nonlinear flux identification errors in the hybrid air-gap flux model of vector control system is carried out. The effectiveness of the nonlinear dynamic model has been verified by simulation and experiment results, which shows its excellent control performance.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Magnetic Field Vector Control With Dynamic-Variant Parameters for High-Power Electrically Excited Synchronous Motor

Han

Wu²,

et al. 2020

IEEE Trans. Power Electron.

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“…For feasible torque commands, DB-DTFC achieves the desired torque in one switching period by solving an inverse discrete-time machine model. DB-DTFC was initially introduced for induction motors [15][16][17][18], and later successfully applied to permanent magnet motors [19,20] and synchronous reluctance motors [21][22][23]. DB-DTFC has not been implemented on SRM in any other work.…”

Section: Introductionmentioning

confidence: 99%

Minimising torque ripple of SRM by applying DB‐DTFC

Zhang

Han

et al. 2019

IET Electric Power Applications

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Since the traditional direct torque control (DTC) of switched reluctance motors (SRMs) has the shortcomings of large torque ripple and non-constant switching frequency, this study proposes the deadbeat-direct torque and flux-linkage control (DB-DTFC) method for SRM. By analysing the basic principles of SRM, a discrete-time model is established to predict the future states of the SRM drive system. With DB-DTFC, the stator flux and torque can be manipulated during each pulse-width modulation cycle to minimise torque ripple during operation. As a result, the proposed DB-DTFC can minimise the torque ripple as well as apply space-vector modulation with a constant switching frequency. Finally, to verify its effectiveness, DB-DTFC was applied to the 15 kW three-phase 12/8-pole SRM test bench in real time and the results are compared with conventional DTC.

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“…Considering the implementation using digital controllers, the inductance cross-coupling discretized model is developed in [9], [13], [19] for surface PM machines whereby L d = L q . By contrast for interior PM machines, dq cross-coupled difference equations [20] or flux difference equations [21] in discrete-time is developed to realize the inductance crosscoupling decoupling.…”

Section: Introductionmentioning

confidence: 99%

Digital Implementation Issues on High Speed Permanent Magnet Machine FOC Drive Under Insufficient Sample Frequency

et al. 2019

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This paper investigates digital implementation issues on high-speed permanent magnet (PM) machine drives. The machine operating speed is designed beyond 30krpm where the ratio of controller sample frequency over rotor f sample operating frequency f e is less than 5. Because microcontrollers are used in variable frequency drives to realize the field oriented control (FOC), the discretized effects must be considered to maintain the controller stability under low ratios of f sample /f e. In this paper, the FOC based on different digital controllers is compared specifically at low f sample /f e. It is shown that digital controllers using forward difference and bilinear approximation are able to maintain the drive stability if the voltage delay and inductance cross-coupling are compensated. However, the drive performance strongly depends on the accuracy of the inductance parameter. By contrast, the controller using direct digital design achieves the better FOC performance independent to machine parameters. Different types of controllers have experimentally compared to find a suited high-speed FOC drive. This paper includes the design guidance of high-speed FOC drive for PM machines with different time constants. INDEX TERMS Machine drives, digital controller, discrete-time approximation, field oriented control.

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Deadbeat-Direct Torque and Flux Control for Wound Field Synchronous Machines

Cited by 29 publications

References 20 publications

Nonlinear Magnetic Field Vector Control With Dynamic-Variant Parameters for High-Power Electrically Excited Synchronous Motor

Nonlinear Magnetic Field Vector Control With Dynamic-Variant Parameters for High-Power Electrically Excited Synchronous Motor

Minimising torque ripple of SRM by applying DB‐DTFC

Digital Implementation Issues on High Speed Permanent Magnet Machine FOC Drive Under Insufficient Sample Frequency

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