Comparing Different Resonant Control Approaches for Torque Ripple Minimisation in Electric Machines

Steffen, Thomas; Rafaq, Muhammad Saad; Midgley, Will

doi:10.3390/act11120349

Cited by 2 publications

(2 citation statements)

References 17 publications

(19 reference statements)

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“…Meanwhile, resonant control merely adds a parallel controller to the PI's of the already existing control to improve drivetrain dynamics. It is a promising control strategy that has been compared with other active control methods and is seen as a popular approach [31,32], as proven by the various applications where it is applied, e.g., photovoltaic power condition systems [33], electric linear motor harmonic suppression [34], converters for grid applications [35,36], and electrical drives in general [21,37]. Active control (in general) increases dynamic response and is of value for torque and speed ripple reductions, especially in cases where the previously mentioned alternatives do not provide desired results.…”

Section: Introduction 1problem Statement and Literature Reviewmentioning

confidence: 99%

Active Torque Control for Speed Ripple Elimination: A Mechanical Perspective

Croonen,

Deraes,

Beckers

et al. 2024

Machines

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Torque fluctuations in drivetrains are the result of dynamic excitations and can be unfavorable for the lifetime of the system. Passive ripple suppression methods exist, such as torsional dampers and flywheels, which are often bulky and not always desired. Alternatively, performant active control methods exist; however, their applicability to certain drivetrains is not covered. Therefore, this paper focuses on active control from a mechanical perspective, more specifically, drivetrain dynamics impacting active control effectiveness. A quasi-resonant controller is implemented as an active control method, and its performance and robustness are proven both in simulation on a 3-DOF mechanical model and experimentally at different excitation frequencies. The tests show that active control effectiveness is highly drivetrain-dependent. In particular, the propagation of the torque oscillation is influenced by the elastic filtering properties of the drivetrain, and the speed ripple depends on the inertial attenuation of the drivetrain. High-stiffness, low-inertia drivetrains benefit best from active control for ripple suppression because the inertial attenuation is limited, while high-stiffness elements increase the mechanical bandwidth before dynamic decoupling happens between the inertias of interest. Active control serves as a viable alternative for speed ripple reduction when drivetrain compactness is key, instead of the current passive solutions.

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Section: Introduction 1problem Statement and Literature Reviewmentioning

confidence: 99%

Active Torque Control for Speed Ripple Elimination: A Mechanical Perspective

Croonen,

Deraes,

Beckers

et al. 2024

Machines

View full text Add to dashboard Cite

show abstract

“…Induction motors (IMs) have been widely used in high-power modern industries due to their large capacity, simple structure, and wide speed range [1][2][3]. The 3L-NPC inverter is more suitable for high-power medium-voltage drives than a two-level inverter because of the low voltage stress of the power device, low voltage change rate, and lower harmonic voltage content [4,5].…”

Section: Introductionmentioning

confidence: 99%

Torque Increase Strategy for Induction Motor in the Field-Weakening Region Based on Model Predictive Control

Huang,

Liu,

Zhang

et al. 2023

Actuators

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In the field-weakening region, the traditional field-weakening method for induction motor drives based on model predictive control (MPC) is to take a no-load operation as the premise and adjust the flux reference in the cost function proportional to the inverse of the rotor speed, which leads to poor torque output. This paper presents a novel field-weakening method for IM drives based on MPC. Considering the induction motor field-weakening limiting conditions and according to the speed adaptive field-weakening strategy with a voltage closed-loop, the speed adaptive field-weakening controllers were designed to optimize the references of the excitation current and torque current. In the rotor field-orientation d–q coordinate system, the stator flux amplitude and torque reference values were optimized by the optimal distribution current. Then, according to the dead-beat control principle, they were converted into an equivalent stator flux vector reference. Moreover, the stator voltage vector reference can be obtained. For an induction motor fed by a three-level neutral point clamped (3L-NPC) inverter, the cost function was constructed by combining all the constraints, including the voltage vector, the neutral potential balance, and the switching frequency. In this way, the high-performance field-weakening operation for the induction motor based on a model predictive control can be realized. The simulation and experiment results show that the proposed method can increase the torque output by 22% in the field-weakening region; at the same time, the steady characteristics and the dynamic response performance can be maintained well.

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Comparing Different Resonant Control Approaches for Torque Ripple Minimisation in Electric Machines

Cited by 2 publications

References 17 publications

Active Torque Control for Speed Ripple Elimination: A Mechanical Perspective

Active Torque Control for Speed Ripple Elimination: A Mechanical Perspective

Torque Increase Strategy for Induction Motor in the Field-Weakening Region Based on Model Predictive Control

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