Results 241 to 250 of about 40,484 (277)

An Improved Direct Instantaneous Torque Control of Doubly Salient Electromagnetic Machine for Torque Ripple Reduction

IEEE Transactions on Industrial Electronics, 2021
The doubly salient electromagnetic machine (DSEM) is a suitable candidate in many industrial applications due to its simple construction and low manufacture cost. However, the doubly salient structure and the conventional square-wave control method lead to the large torque ripple in the DSEM.
Xu Chen, Zhuoran Zhang, Li Yu
exaly   +2 more sources

Enhanced Direct Instantaneous Torque Control of Switched Reluctance Machine with phase current limitation

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
In this work, an Enhanced Direct Instantaneous Torque Control (EDITC)of a Switched Reluctance Machine is explored. The main issue of regular direct instantaneous torque control (DITC) is that the current is measured but not controlled. Therefore, a new algorithm for hysteresis-controller was provided which included additional feature such as current ...
Shah, Dhruv, Hilairet, Mickael, Bahri, Imen   +2 more
exaly   +4 more sources

A Simple Strategy for Parameters Identification of SRM Direct Instantaneous Torque Control

IEEE Transactions on Power Electronics, 2018
This paper proposed a simple strategy for parameters identification of switched reluctance motor (SRM) direct instantaneous torque control. This strategy without rotor locking includes measuring and calculating steps. In the measuring step, flux linkage curves with current at three critical positions are obtained.
Shuchun Yao
exaly   +2 more sources

Direct Instantaneous Torque Control in Direct Drive Permanent Magnet Synchronous Motors—a New Approach

IEEE Transactions on Energy Conversion, 2007
In this paper, a novel direct instantaneous torque control scheme for a direct drive (DD) permanent magnet synchronous motor (PMSM) is presented. A hybrid control structure combining the internal model principle and the variable structure control (VSC) approach is proposed. First, a variable structure torque controller is adopted to regulate the torque
exaly   +2 more sources

A Newly Designed Instantaneous-Torque Control of Direct-Drive PMSM Servo Actuator With Improved Torque Estimation and Control Characteristics

IEEE Transactions on Industrial Electronics, 2007
In this paper, a newly designed instantaneous-torque-control scheme with improved instantaneous-torque estimation and control characteristics in a direct-drive permanent-magnet synchronous motor (DD-PMSM) is presented. A hybrid control structure that combines the internal-model principle and the variable-structure control approach is proposed.
exaly   +2 more sources

Instantaneous Torque Estimation in Sensorless Direct-Torque-Controlled Brushless DC Motors

IEEE Transactions on Industry Applications, 2005
A key issue in the direct torque control of permanent-magnet brushless dc motors is the estimation of the instantaneous electromagnetic torque, while sensorless control is often advantageous. A sliding-mode observer is employed to estimate the nonsinusoidal back-electromotive-force waveform, and a simplified extended Kalman filter is used to estimate ...
Y. Liu, Z.Q. Zhu, D. Howe
openaire   +1 more source

Optimal torque sharing in direct instantaneous torque control of switched reluctance motors

2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015
In this paper, optimal waveforms to control constant instantaneous torque of switched reluctance motors while minimizing copper losses are computed by using the pattern search as an optimization algorithm. Optimal torque sharing using two quadratic and one linear functions is proposed to approximate the optimal torque waveforms accurately.
Tetsuya Kojima, Rik W. De Doncker
openaire   +1 more source

Instantaneous power control-an alternative to vector and direct torque control?

Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129), 2002
This paper presents a new algorithm for the control of AC machines based on the concept of controlling the instantaneous real and imaginary power. This strategy, called instantaneous power control (IPC), allows decoupled control of the torque and flux in the machine.
R.E. Betz, B.J. Cook
openaire   +1 more source

Sensorless direct instantaneous torque control for switched reluctance machines

2005 European Conference on Power Electronics and Applications, 2005
This paper presents a position-sensorless torque controller for switched reluctance machines (SRMs) based on direct instantaneous torque control (DITC). An indirect position estimation to eliminate the need of the position encoder is developed based on current-flux-linkage method.
N.H. Fuengwarodsakul, S.E. Bauer, J. Krane, C.P. Dick, R.W. De Doncker   +4 more
openaire   +1 more source

Torque ripple reduction of SRM using advanced direct instantaneous torque control scheme

2007 International Conference on Electrical Machines and Systems (ICEMS), 2007
In this paper, an advanced torque control scheme of SRM using DITC(Direct Instantaneous Torque Control) and PWM(pulse width modulation) is presented. Different from conventional DITC method, proposed method uses one or two switching modes at every sampling time, instead of only one switching mode.
null Huijun Wang, null Dong-Hee Lee, null Jin-Woo Ahn   +2 more
openaire   +1 more source