Speed Adaptive Voltage Closed-Loop Field-Weakening Control for Induction Motor Drives

Wang, Bo; Zhang, Jing; Yu, Yong; Zhang, Xu; Xu, Dianguo

doi:10.1109/ecce.2019.8912547

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The system diagram of the voltage closed-loop speed adaptive field-weakening control scheme is shown in Figure 2 [22,23].…”

Section: Voltage Closed-loop Field-weakening Control Schemementioning

confidence: 99%

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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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“…The system diagram of the voltage closed-loop speed adaptive field-weakening control scheme is shown in Figure 2 [22,23].…”

Section: Voltage Closed-loop Field-weakening Control Schemementioning

confidence: 99%

“…In Equation (22), the rotor flux at the (k + 1)th instant is calculated by Equation ( 4). The angle of the new stator flux vector reference can be obtained by Equation (23).…”

Section: Im Drives Based On Mpc With Proposed Field-weakening Schemementioning

confidence: 99%