The Use of Concentrated Windings for High-Power Synchronous Wind Generators

2021 ◽  
Vol 4 (4) ◽  
pp. 50-57
Author(s):  
Viktor N. ANTIPOV ◽  
◽  
Andrey D. GROZOV ◽  
Anna V. IVANOVA ◽  
◽  
...  
Keyword(s):  
Low Power ◽  
High Power ◽  
Synchronous Machines ◽  
Cogging Torque ◽  
Application Field ◽  
Main Application ◽  
Wind Generators ◽  
Winding Factor

Low-power machines were commonly considered as the main application field of concentrated windings. However, a lot of paper have recently been published, which address both the theory of these windings and specific cases of their application for large synchronous machines. The article presents an analysis of the parameters of concentrated windings having various configurations intended for use in high-power gear and gearless wind generators. In assessing the winding, not only the high winding factor value was taken into account, but also the star of slot EMFs, harmonic spectra of the MMFs and EMFs, the cogging torque component and torque pulsation under load, as well as emerging losses. It is shown that the well-known advantages of concentrated windings over distributed windings can be fully realized by choosing the appropriated numbers of slots and poles.

scholarly journals Application of Concentrated Windings for High-Power Synchronous Wind Generators

2020 ◽  
Vol 220 ◽  
pp. 01029
Author(s):  
V.N. Antipov ◽  
A.D. Grozov ◽  
A.V. Ivanova
Keyword(s):  
High Power ◽  
Electromotive Force ◽  
Direct Drive ◽  
Load Torque ◽  
Magnetomotive Force ◽  
Cogging Torque ◽  
Wind Generators ◽  
The Right ◽  
Performance Conditions ◽  
Winding Factor

The article analyzes the parameters of various configurations concentrated windings for application in high-power geared and direct drive wind generators. It is specified that the concentrated windings advantages over distributed ones can be fully realized by choosing the right values of pole pairs and the slots number. It is shown that the choice of the winding should take into account not only the highest winding factor, but also to the star of slots for the analysis of the harmonic contents of the magnetomotive force (MMF) and electromotive force (EMF), cogging torque and load torque pulsation. Windings with performance conditions Z=12+6k, 2p=Z ±2, k=0,1,2,3,…having an odd number of pole pairs are recommended for high-power wind generators.

Less Power, Greater Conflict

2018 ◽  
Vol 49 (1) ◽  
pp. 47-62 ◽  
Author(s):  
Petra C. Schmid
Keyword(s):  
Low Power ◽  
High Power ◽  
Goal Pursuit ◽  
Goal Conflict ◽  
Personal Goals ◽  
Multiple Goals ◽  
Objective Performance ◽  
The Future ◽  
The Way

Abstract. Power facilitates goal pursuit, but how does power affect the way people respond to conflict between their multiple goals? Our results showed that higher trait power was associated with reduced experience of conflict in scenarios describing multiple goals (Study 1) and between personal goals (Study 2). Moreover, manipulated low power increased individuals’ experience of goal conflict relative to high power and a control condition (Studies 3 and 4), with the consequence that they planned to invest less into the pursuit of their goals in the future. With its focus on multiple goals and individuals’ experiences during goal pursuit rather than objective performance, the present research uses new angles to examine power effects on goal pursuit.

AlInAs/GaInAs on InP HEMTs for low power supply voltage operation of high power-added efficiency microwave amplifiers

1993 ◽  
Vol 29 (15) ◽  
pp. 1324 ◽  
Author(s):  
L.E. Larson ◽  
M.M. Matloubian ◽  
J.J. Brown ◽  
A.S. Brown ◽  
M. Thompson ◽  
...  
Keyword(s):  
Low Power ◽  
High Power ◽  
Power Supply ◽  
Supply Voltage ◽  
Power Supply Voltage ◽  
Power Added Efficiency ◽  
Microwave Amplifiers

Effect of Power on Moral Judgment

1978 ◽  
Vol 42 (2) ◽  
pp. 387-394
Author(s):  
Russell Hamby
Keyword(s):  
Social Psychology ◽  
Moral Responsibility ◽  
Low Power ◽  
Moral Judgment ◽  
Factorial Design ◽  
High Power ◽  
Moral Judgments ◽  
Need For Power ◽  
Experimenter Effects

Ambiguous effects of power on attributions of moral responsibility for an accident are interpreted to result from the intervening effects of need for power, which is aroused by the anticipation of exercising power over another. 160 subjects from introductory social psychology classes participated in a questionnaire-type experiment comparing effects of high/low carelessness, severe/minor consequences, and high/low power of the attributor in a 2 × 2 × 2 factorial design. In a follow-up experiment 30 subjects were assigned to conditions of high or low power, and their needs for power and moral attributions were measured. High power seemed to arouse need for power, which was curvilinearly related to moral judgments. Those high and low in need for power attributed more moral responsibility to the perpetrator of an accident than those with moderate levels of need for power. The results suggest complicated models of both moral judgments and experimenter effects related to the level or arousal of motivations.

Feeling Guilty and Flattering God: The Mediating Role of Prayer

2021 ◽  
pp. 009164712199242
Author(s):  
Beata Zarzycka ◽  
Kamil Tomaka ◽  
Katarzyna Zając ◽  
Klaudia Marek
Keyword(s):  
Low Power ◽  
High Power ◽  
Mediating Role ◽  
Shame Proneness ◽  
The Relationship ◽  
Significant Mediator

Ingratiation refers to acts of flattery, typically given by a low-power person to a high-power one, performed to gain acceptance and approval. This study investigates ingratiation in the religious setting, asking whether people feeling high levels of guilt or shame tend to manifest such ingratiating behavior toward God. The study aimed to examine the mediating role of prayer in the relationship between guilt and shame and ingratiation toward God. A total of 148 respondents (80 women and 68 men) participated in the study. The Religious Ingratiation Scale, the Content of Prayer Scale, and the Guilt and Shame Proneness Scale were applied to the research. The results showed that feeling guilty increased the tendency to ingratiation toward God. Prayer was the significant mediator in this relationship. People high in guilt tend to flatter God by offering more adoration and fewer repine prayers.

Effects of Unequal Power on Cooperation in Conflict

1979 ◽  
Vol 44 (1) ◽  
pp. 239-242 ◽  
Author(s):  
Dean Tjosvold ◽  
Morris Okun
Keyword(s):  
Low Power ◽  
High Power ◽  
The Other

Participants were randomly assigned to be high or low power and interacted with another who consistently cooperated, or consistently competed, or alternatively cooperated and competed. Results indicate that low power participants acted more cooperatively, were more attracted to, and wanted to facilitate the other's outcomes to the extent the other had cooperated; the cooperativeness of the high power participants was unaffected by the low power person's actions.

Powerlessness corrupts? Disproportionate monitoring of low-power actors

2021 ◽  
Author(s):  
Jen Overbeck ◽  
Leigh Tost ◽  
Abbie Wazlawek
Keyword(s):  
Low Power ◽  
Agency Theory ◽  
High Power ◽  
Field Studies ◽  
Institutional Level ◽  
Self Interest ◽  
Psychological Predictor ◽  
Theory Research

Monitoring is a common tactic used to constrain the behavior of organizational actors. Agency theory research on monitoring focuses at the institutional level on factors such as incentives, contracts, or self-interest, largely directed at those with high power. At the same time, significant monitoring is clearly directed at low-power workers, whose performance and compliance behaviors may be rigidly controlled; arguably, the degree to which monitoring is directed at low-power more than at high-power actors is disproportionate. In this paper, we examine a psychological predictor of decisions about whom to monitor: Specifically, we contend that people’s judgments of someone’s ethicality and thereby trustworthiness are predicted by the target’s power; and these inferences on the basis of power affect decisions about whom to monitor. As a consequence, institutions may excuse powerful actors from the monitoring requirements that should constrain any ethical lapses. That is, an overly credulous view of the powerful or misdirected suspicion toward the powerless may create conditions that enable abuses by the powerful. We examine these predictions in a series of 5 studies (3 experiments and 2 field studies). Our findings challenge the notion that people subscribe to a “power corrupts” view in evaluating powerholders, and our research highlights how the very mechanism organizations put in place to constrain powerholders’ behaviors (i.e., monitoring) may, because of psychological biases in power-based inferences, be directed away from the intended targets.

scholarly journals Bidirectional DC/DC Power Converter for Hybrid Yacht Propulsion System

2018 ◽  
Vol 2 (Special edition 2) ◽  
pp. 133-142
Author(s):  
Saša Sladić ◽  
Damir Kolić ◽  
Marko Šuljić
Keyword(s):  
Low Power ◽  
Critical Points ◽  
High Power ◽  
Thermal Imaging ◽  
Cost Effective ◽  
Power Converter ◽  
Propulsion System ◽  
Typical Application ◽  
Electric Drives ◽  
Dc Power

Typical application of bidirectional DC/DC power converter exists in hybrid cars. Recently, a similar approach has been applied in hybrid propelled ships as well. In this paper, a novel low power bidirectional DC/DC power converter of standard Buck/Boost topology has ben designed in order to explore possibilities of the high power design in maritime applications. In order to discover critical points of a design, thermal imaging has been investigated. The results clearly indicate that the proposed solution is more cost effective than a typical standard bidirectional DC/DC power converter. Likewise, the improvement in maneuvering of the propelled vessel system with two and more electric drives has been investigated and compared to a classical diesel, single engine propulsion system.

The Power of Projection for Powerless and Powerful People

2017 ◽  
Vol 8 (8) ◽  
pp. 888-896 ◽  
Author(s):  
Claudia Toma ◽  
Vincent Yzerbyt ◽  
Olivier Corneille ◽  
Stéphanie Demoulin
Keyword(s):  
Low Power ◽  
Social Perception ◽  
High Power ◽  
Meta Analysis ◽  
Target Person ◽  
Social Projection ◽  
The Social ◽  
Manipulation Task ◽  
Target Characteristics

Past social projection research has mainly focused on target characteristics as a moderator of projective effects. The current research considers the power of the perceiver and how it affects projection of competence and warmth. In three studies, participants first rated themselves on a list of traits/preferences, then performed a power manipulation task, and, finally, rated a target person on the same list. Studies 1 and 2 reveal that the effect of power on social projection is moderated by dimension of judgment: high-power/low-power participants project more on competence/warmth than low-power/high-power participants. A meta-analysis conducted on Studies 1, 2, 3, and two additional studies confirmed those results. Study 3 additionally shows that high power increases the salience of competence, whereas low power increases the salience of warmth. Implications for both the power and the social perception literatures are discussed.

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