Results 161 to 170 of about 7,625 (211)

Torque ripple minimization in direct-drive systems

Proceedings. 1998 IEEE/RSJ International Conference on Intelligent Robots and Systems. Innovations in Theory, Practice and Applications (Cat. No.98CH36190), 2002
The open-loop torque control of synchronous motors with minimum torque ripple and minimum copper losses is presented. The control problem is viewed as an optimization problem for the nonlinear mapping from desired torque and position to the motor's phase currents.
Farhad Aghili, Martin Buehler, John M. Hollerbach   +2 more
openaire   +1 more source

Torque ripple reduction of a variable flux motor

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
This paper examines torque ripple in a new topology of variable flux machine with AlNiCo magnet. To reduce the torque ripple, the design and finite element modeling of this machine are reviewed and the finite element model results are verified with the prototyped motor. The effects of various electrical, magnetic and geometrical parameters such as load,
Amirmasoud Takbash, Pragasen Pillay, Ibrahim, Maged   +2 more
openaire   +1 more source

Torque ripple and misalignment torque compensation for the built-in torque sensor of harmonic drive systems

IEEE Transactions on Instrumentation and Measurement, 1998
A harmonic drive is a compact, lightweight, and high-ratio torque transmission device which is used in many electrically actuated robot manipulators. In this paper a built-in torque sensor for harmonic-drive systems is examined in detail. The method proposed by Hashimoto, in which strain gauges are directly mounted on the flexspline, is employed and ...
Hamid D. Taghirad, P. R. Bélanger
openaire   +1 more source

A novel torque-ripple reduction strategy for direct torque control [of induction motor]

IEEE Transactions on Industrial Electronics, 2001
This letter presents a simple duty-cycle control scheme for the direct torque control of an induction motor. The scheme reduces torque ripple, controls the average output torque, and reduces the variation in switching frequency. The effectiveness of the proposed technique is demonstrated through experimental results.
Telford, D., Dunnigan, M., Williams, B.W.   +2 more
openaire   +3 more sources

Auto-compensation of torque ripple of DD motor by torque observer

Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting, 2002
A torque control system for DDM (direct drive motor) with a permanent magnet rotor equipped with a torque observer implemented by software of a digital signal processor is proposed. The speed fluctuation against a disturbance can be fully removed with a torque feedforward loop.
N. Matsui, T. Makino, H. Satoh
openaire   +1 more source

Torque Ripple Minimization for Induction Motor Drives with Direct Torque Control

Electric Power Components and Systems, 2004
Direct torque control (DTC) schemes can produce quick and robust responses, but they usually behave like hysteresis controllers. Consequently there are similar problems like non constant switching frequencies and high torque ripple especially when operation conditions result in low switching frequencies.
R. Kennel, A. El-refaei, F. Elkady, S. Mahmoud, E. Elkholy   +4 more
openaire   +1 more source

Torque Ripple Analysis of the Slotted LATM

2021 IEEE PES/IAS PowerAfrica, 2021
limited angle torque motors have various applications in industry and so, performance improvement of this actuators, has attracted considerable research subjects. This paper presents the analysis and numerical simulation of torque characteristics of the slotted limited angle torque motor. The effect of structure parameters on the torque characteristics
openaire   +1 more source

Reduction of torque ripple and increase of torque capacity of BLDC motor

2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2012
This paper uses the idea of increasing the phases of Brushless DC motors (BLDC motors) with the purpose of Performance improvement of this motors. At first, a new model for the drive of 9-phase BLDC motor is studies. This model is simulated and run by Matlab/Simulink software.
Seyed Mohammad Hossein Mousavi, Seyed Sajjad Salehi Ghaleh Sefid, Seyed Mohsen Mirbagheri, Seyed Ebrahim Salehi Ghaleh Sefid   +3 more
openaire   +1 more source

Transverse-flux motor for enhanced torque and reduction of torque ripple

2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), 2015
Windings are significant factors affecting the manufacturing cost and reliability of motors. For use in electric vehicles, motors should be highly efficient, inexpensive, and highly reliable; moreover, high efficiency and reliability are major requirements for wind generators.
Kazuto Sakai, Junya Tanaka
openaire   +1 more source

Modeling of Torque Ripple for Integrated Robotic Joint

2019
The torque ripple that leads to vibration greatly affects the performance of robotic joint like motion accuracy. However, the torque ripple models currently used in feedforward control are incomprehensive because only motor or harmonic drive torque ripple of the joint is considered.
Yusheng Liao, Chi Zhang 0014, Chongchong Wang, Chin-Yin Chen, Qiang Xin, Si-Lu Chen 0001   +5 more
openaire   +1 more source