Results 1 to 10 of about 1,622,335 (215)

Experimental Verification of Model-Based Wavefront Sensorless Adaptive Optics System for Large Aberrations [PDF]

Micromachines
To address the limitations of conventional wavefront sensorless adaptive optics (AO) systems regarding iteration efficiency and convergence speed, this study conducts an experimental validation of a model-based wavefront sensorless AO approach.
Huizhen Yang, Yongqiang Miao, Peng Chen, Zhiguang Zhang, Zhaojun Yan   +4 more
doaj   +2 more sources

Observers for High-Speed Sensorless PMSM Drives: Design Methods, Tuning Challenges and Future Trends

IEEE Access, 2021
Rotor position and speed estimation methods are consolidated to reduce the cost and volume of permanent magnet synchronous motor (PMSM) sensorless control drives while maintaining high performance.
Cesar Jose Volpato Filho, Dianxun Xiao, Rodrigo Padilha Vieira, Ali Emadi   +3 more
doaj   +1 more source

Enhancement of Sensorless Control for Non-Sinusoidal Multiphase Drives-Part I: Operation in Medium and High-Speed Range

Energies, 2022
This two-part study proposes a new sensorless control strategy for non-sinusoidal multiphase permanent magnet synchronous machines (PMSMs), especially integrated motor drives (IMDs).
Youssouf Mini, Ngac Ky Nguyen, Eric Semail, Duc Tan Vu   +3 more
doaj   +1 more source

Sensorless Modeling of Varying Pulse Width Modulator Resolutions in Three-Phase Induction Motors. [PDF]

PLoS ONE, 2017
A sensorless algorithm was developed to predict rotor speeds in an electric three-phase induction motor. This sensorless model requires a measurement of the stator currents and voltages, and the rotor speed is predicted accurately without any mechanical ...
Matthew David Marko, Glenn Shevach
doaj   +1 more source

Sensorless control of IPMSM using a discrete-time super twisting observer by high-frequency current injection in low speed region

Energy Reports, 2022
Control of interior permanent magnet synchronous motors (IPMSMs) has been extensively attempted without any position sensor. At extremely low speeds, sensorless operation would not rely on the fundamental model-based sensorless methods since the ...
Z. Xu, Chris Gerada
doaj   +1 more source

Dynamic Performance Enhancement Method Based on Improved Model Reference Adaptive System for SPMSM Sensorless Drives

IEEE Access, 2021
Conventional sensorless drives usually suffer from an unsatisfactory dynamic response to the varying speed reference or load disturbance due to the design only for the speed estimator.
Yirong Tang, Wei Xu, Yi Liu, Dinghao Dong   +3 more
doaj   +1 more source

An Improved Sensorless Nonlinear Control Based on SC-MRAS Estimator of Open-End Winding Five-Phase Induction Motor Fed by Dual NPC Inverter: Hardware-in-the-Loop Implementation

Machines, 2023
This paper introduces a sensorless nonlinear control scheme based on feedback linearization control (FLC) of an open-end winding five-phase induction motor (OeW-5PIM) topology fed by a dual neutral point clamped (NPC) inverter.
Saad Khadar, Almoataz Y. Abdelaziz, Zakaria M. Salem Elbarbary, Mahmoud A. Mossa   +3 more
doaj   +1 more source

Sensorless speed control of DC motor using EKF estimator and TSK fuzzy logic controller

Automatika, 2022
In this article, sensorless speed control of DC motor has been proposed using the extended Kalman filter (EKF) estimator and Takagi–Sugeno-Kang (TSK) fuzzy logic controller (FLC).
Ravi Pratap Tripathi, Ashutosh Kumar Singh, Pavan Gangwar, Ramesh Kumar Verma   +3 more
doaj   +1 more source

Speed Sensorless Control of Hybrid Excitation Axial Field Flux-Switching Permanent-Magnet Machine Based on Model Reference Adaptive System

IEEE Access, 2020
A novel 6/13-pole hybrid excitation axial field flux-switching permanent magnet machine (HEAFFSPMM) exhibits strong fault tolerance capability, high efficiency, and large torque density.
Wei Zhang, Zexian Yang, Liangguan Zhai, Jiale Wang   +3 more
doaj   +1 more source

A novel FPGA‐Based Bi input‐reduced order extended Kalman filter for speed‐sensorless direct torque control of induction motor with constant switching frequency controller

IET Computers & Digital Techniques, 2021
This study proposes an FPGA‐based hardware in the loop (HIL) emulator for speed‐sensorless of induction motor (IM) constant switching frequency controller‐based direct torque control (CSFC‐DTC) with a novel bi input‐reduced order extended Kalman filter ...
Remzi Inan
doaj   +1 more source