Results 311 to 320 of about 27,949 (355)

Saliency-based sensorless predictive torque control with reduced torque ripple

IEEE Transactions on Power Electronics, 2012
The proposed sensorless predictive torque control (PTC) scheme relies on the anisotropy of the inductance, assuming a continuous presence of a slight current ripple. At high speed, this condition is fulfilled inherently, while at low speed it has to be ensured by an arbitrary voltage injection.
P. Landsmann, R. K. Kennel
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Torque ripple reduction in direct torque controlled Brushless DC motor

2011 International Conference on Electrical Machines and Systems, 2011
This paper describes torque ripple reduction in direct torque controlled Brushless DC Motor. The zero voltage vector in present most direct torque control technique is defined as the state when all switches are turn-off. However, in studying the circuit of the switch state in each sector, recognized the voltage of motor windings are not zero. Thus, six
Zhenguo Li, Lu Wang, Songfa Zhang, Chunjiang Zhang, Jin-Woo Ahn   +4 more
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Torque ripple suppression control for permanent magnet motors

2014 European Control Conference (ECC), 2014
Permanent magnet motors are largely employed due to their high performances in terms of efficiency, power factor and power density. However, non-uniformity into the generated torque may heavily limit their use. In this paper a novel approach is proposed to cancel torque ripple when motor parameters are unknown.
FEDELE, Giuseppe, Ferrise A.
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Torque ripple control for synchronous motors using instantaneous torque estimation

2011 IEEE Energy Conversion Congress and Exposition, 2011
This paper presents a new control technique for minimizing torque ripple in permanent magnet synchronous motors (PMSMs) and synchronous reluctance motors (Syn.RMs). This control technique is based on instantaneous torque estimation with a new mathematical model.
Noriya Nakao, Kan Akatsu
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Torque Ripple Reduction for Step Motors

2003
In this chapter, we present controllers that reduce torque ripple for different types of stepper motors. The pulsating torque developed when a stepper motor is full- or half-stepped is known as the torque ripple and is the main cause of exciting resonance in the motor.
Farshad Khorrami, Prashanth Krishnamurthy, Hemant Melkote   +2 more
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Reconfigurable Direct Torque and Flux Control with Torque Ripple Reduction

IFAC Proceedings Volumes, 2011
Abstract This work presents a reconfigurable direct torque and flux control strategy which guarantees good performance in presence of faults in the actuator, the voltage source inverter. It is based on a new quantification of the stator flux vector position means a new definition of sectors on the ab-plane.
Matías A. Nacusse, Mónica E. Romero, Sergio J. Junco   +2 more
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Commutation-Torque-Ripple Minimization in Direct-Torque-Controlled PM Brushless DC Drives

IEEE Transactions on Industry Applications, 2006
This paper describes an improved implementation of direct torque control (DTC) to a permanent-magnet brushless dc (BLDC) drive. The commutation torque ripple, which occurs every 60deg elec. in a conventional three-phase BLDC machine with two-phase 120deg elec.
Y. Liu, Z. Zhu, D. Howe
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Torque ripple in synchronous reluctance motor

MELECON '98. 9th Mediterranean Electrotechnical Conference. Proceedings (Cat. No.98CH36056), 2002
The paper describes the calculation and reduction of torque ripple in a synchronous reluctance motor (SRM). The analysis is based on finite element modeling and proposes a method of dynamic torque characteristic calculation. The mutual connection between static and dynamic torque characteristic is also established.
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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
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Torque ripple reduction in direct torque control of induction motor drives

Proceedings. National Power Engineering Conference, 2003. PECon 2003., 2005
This paper gives an overview to the principle of direct torque control (DTC) of induction machines (IM) drives. A summary to the various techniques of torque ripple reduction followed by a proposed simple method to reduce the torque ripple is also presented. Modeling and design methodology of this proposed method are given.
Toh, C.L, Idris , N.R.N, Yatim, A.H.M
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