نتایج جستجو برای: torque speed diagram

تعداد نتایج: 284297  

2007
Luc Berger

We show that each mechanism of the Gilbert damping of wall motion corresponds to a current-induced drive torque on the domain wall, based on the same electron processes. For example, the damping theory of Heinrich, Fraitova, and Kambersky is directly related to the theory of nonadiabatic drive torques by Zhang and Li. Using momentum conservation, this relation is extended to the wall resistance...

2010
Horst Grotstollen

The design of drives for high accelerating loads becomes very simple and clear with the fact that the torque– acceleration product is transmitted unchanged by an ideal gear, just like in the case of the torque–speed product (i.e., mechanical power). With this knowledge, it is easy to determine the required rated power and power rate a motor must possess for driving a given load with the specifi...

2016
Naveen Chander

This paper proposes direct torque control of induction motor simulation using conventional method. Direct Torque Control (DTC) is a control technique used in AC drive systems to obtain high performance torque control and thereby controlling the speed of induction motor. The principle is based on simultaneous decoupling of stator flux and electromagnetic torque of AC drive system. DTC drives use...

In this research paper, the performance of an air-cored axial flux permanent magnet synchronous generator is evaluated for low speed, direct drive applications using 3D finite element modeling and experimental tests. The structure of the considered machine consists of double rotor and coreless stator, which results in the absence of core losses, reduction of stator weight and elimination of cog...

2005
K. E. Johnson L. Y. Pao M. J. Balas V. Kulkarni Kathryn E. Johnson Lucy Y. Pao Mark J. Balas Vishwesh Kulkarni

Variable speed wind turbines are designed to follow wind speed variations in low winds in order to maximize aerodynamic efficiency. Unfortunately, uncertainty in the aerodynamic parameters may lead to sub-optimal power capture in variable speed turbines. Adaptive generator torque control is one method of eliminating this suboptimality; however, before adaptive control can become widely used in ...

Journal: :کشاورزی (منتشر نمی شود) 0
هادی صمیمی اخیجهانی دانشجوی سابق کارشناسی ارشد، گروه فنی کشاورزی، پردیس ابوریحان، دانشگاه تهران اکبر محمد عرب حسینی دانشیار، گروه فنی کشاورزی، پردیس ابوریحان، دانشگاه تهران، پاکدشت محمدحسین کیانمهر دانشیار، گروه فنی کشاورزی، پردیس ابوریحان، دانشگاه تهران، پاکدشت حامد مهرآور دانشجوی سابق کارشناسی ارشد، گروه فنی کشاورزی، پردیس ابوریحان، دانشگاه تهران، پاکدشت

a new mechanical cultivator was proposed for mechanical weeding in part one. the precise point method was used to geometric design of this new cultivator. the aim of this research is selecting the suitable mechanism of the studied mechanisms in part one. the velocity and acceleration of links (kinematic) is the base of dynamic analysis of the systems. the variation of velocity, acceleration and...

Journal: :CoRR 2010
C. Srisailam Mukesh Tiwari Anurag Trivedi

This paper describes the use of fuzzy logic controller for efficiency optimization control of a drive while keeping good dynamic response. At steady-state light-load condition, the fuzzy controller adaptively adjusts the excitation current with respect to the torque current to give the minimum total copper and iron loss. The measured input power such that, for a given load torque and speed, the...

2018
Grace Firsta Lukman Pham Trung Hieu Kwang-Il Jeong Jin-Woo Ahn

Abstract: This paper presents a characteristics analysis and performance comparison of high-speed two-phase 4/2 and hybrid single-phase 4/4 switched reluctance motors (SRMs). Although the motors are advantageous as high-speed drives, both conventional structures have high torque ripple as a result of the presence of the torque dead zone. In this paper, solutions to the torque dead zone problem ...

2012
Vinay KUMAR Srinivasa RAO

This paper proposes an algorithm for direct flux and torque controlled three phase induction motor drive systems. This method is based on control of slip speed and decoupled between amplitude and angle of reference stator flux for determining required stator voltage vector. Within the given sampling time, flux as well as torque errors are controlled by stator voltage vector which is evaluated f...

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