Study on Torque Characteristic of Novel External Rotor DSPM Generator

2013 ◽  
Vol 433-435 ◽  
pp. 188-192
Author(s):  
Wei Jun Wang ◽  
Hua Liu ◽  
Bin Li ◽  
Long Bo Mao
Keyword(s):  
Output Voltage ◽  
Torque Ripple ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Output Performance ◽  
Two Dimensional Model ◽  
Doubly Salient ◽  
In Series ◽  
Rotor Tooth ◽  
External Rotor

The external rotor doubly salient permanent magnet (DSPM) generator with PM rotor tooth is designed. The two-dimensional model of the generator is analyzed by finite element method. Without changing the structure of generator, the magnet circuit is kept in the saturated state as soon as possible by paralleling capacitor besides the windings. By comparing the two kinds of rectifier topology structure, the results show that the average electromagnetic torque and the output voltage is significantly enhanced in series multiple rectifier circuit. The torque ripple of generator can be effectively suppressed in the case of load, which has a certain guiding significance for improving the output performance of the generator.

Effects of Structure Parameters on Performance of DSPM Motor

2013 ◽  
Vol 336-338 ◽  
pp. 935-939 ◽  
Author(s):  
Hua Liu ◽  
Wei Jun Wang ◽  
Long Bo Mao ◽  
Qiang Dai
Keyword(s):  
Motor Performance ◽  
Torque Ripple ◽  
Air Gap ◽  
Dimensional Model ◽  
Motor Design ◽  
Doubly Salient ◽  
Rotor Pole ◽  
Design Software ◽  
Overload Capacity ◽  
External Rotor

A novel flux switching external rotor doubly salient permanent magnet (DSPM) motor was researched. The two-dimensional model of the motor was established by Ansoft motor design software and the effects of air gap length and rotor pole arc on motor performance were discussed. The simulation results show that larger or smaller air gap length and rotor pole arc improve the torque ripple rate, but the increase of air gap length is helpful to enhance the overload capacity. The conclusions of this article have positive significance for improving the motor performance.

Influence of Thermal Wires Spacing on Fluidic Gyroscope

2013 ◽  
Vol 753-755 ◽  
pp. 2700-2703
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Pan Pan Yang
Keyword(s):  
Finite Element ◽  
Angular Velocity ◽  
Output Voltage ◽  
Sensitive Element ◽  
Model Building ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Equation Solving ◽  
Element Simulation ◽  
Two Dimensional Model

In this paper, research the influence on spacing thermal wires in the sensitive element of fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two-dimensional airflow distributions of different distances between two thermal wires in sensitive element of fluidic gyroscope are calculated. The results show that, when the angular velocity ωi<20o/s, and the distance between two thermal wires d=4mm, the structure can reduce the velocity of vortex in sensitive element, and increase the thermal wires variation, thus it will increase bridge output voltage, and improve the sensitivity of fluidic gyroscope.

Commitment to pro- versus counter-attitudinal behavior and the dynamics of social representations

2002 ◽  
Vol 61 (1) ◽  
pp. 34-44 ◽  
Author(s):  
Eric Tafani ◽  
Lionel Souchet
Keyword(s):  
Higher Education ◽  
Social Representations ◽  
Cognitive Restructuring ◽  
Social Representation ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Social Actions ◽  
The Social ◽  
Two Dimensional Model ◽  
Students Attitudes

This research uses the counter-attitudinal essay paradigm ( Janis & King, 1954 ) to test the effects of social actions on social representations. Thus, students wrote either a pro- or a counter-attitudinal essay on Higher Education. Three forms of counter-attitudinal essays were manipulated countering respectively a) students’ attitudes towards higher education; b) peripheral beliefs or c) central beliefs associated with this representation object. After writing the essay, students expressed their attitudes towards higher education and evaluated different beliefs associated with it. The structural status of these beliefs was also assessed by a “calling into question” test ( Flament, 1994a ). Results show that behavior challenging either an attitude or peripheral beliefs induces a rationalization process, giving rise to minor modifications of the representational field. These modifications are only on the social evaluative dimension of the social representation. On the other hand, when the behavior challenges central beliefs, the same rationalization process induces a cognitive restructuring of the representational field, i.e., a structural change in the representation. These results and their implications for the experimental study of representational dynamics are discussed with regard to the two-dimensional model of social representations ( Moliner, 1994 ) and rationalization theory ( Beauvois & Joule, 1996 ).

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