There are times when permanent magnet motors are designed with a magnet made with overhang, in other words made longer than the stator’s stack length, in order to strengthen the magnetic field that it creates. A space is necessary in the stator core to supply the coil ends, and there is a wasted space in the rotor if the rotor and stator have the same stack length, so a magnet is placed in this space with the objective of increasing the magnetic flux without making the magnet thicker. However, the magnetic field produced by the overhanging part of the magnet enters the stator at an angle, so magnetic flux is produced in the lamination direction, which creates a possibility of increasing eddy current loss by a wide margin. When the overhang is too big, the magnet’s magnetic field goes to waste because it does not reach the stator.
For this reason it is necessary to set up the overhang amount properly while looking at the trade-off between an increase in torque and an increase in losses. A magnetic field analysis using the finite element method (FEM), which can obtain the relationship between a three dimensional magnetic field and eddy currents, is an effective method for an advance study.
This Application Note presents the use of a no-load iron loss analysis of an SPM motor with and without an overhanging magnet
Abstract Now a days most of the organizations around the corporate world are allocating more in their human resources rather than capital structure, as they believe that employees are significant base for improving their profitability and achieve success.
Researchers have put their best into finding new avenues, where an organization can improve its performance. Thus the purpose of this research is to empirically investigate the influence of employee motivation on performance. In order to materialize the objective, researchers were required to get the questionnaire filled from the employees working in two selected service based organizations. Once the data was collected regression analysis was performed along with that, Cronbach’s alpha test was also performed to test the reliability of the constructs. The constructs in this study were statistically significant, except empowerment. The study also found a positive relation between motivation and performance indicating that the higher the motivation the higher the performance. Thus, concluding that there were ample evidences that autonomy, recognition have significant influence on motivation, which eventually impact on performance of the employees of investigated service organizations based in Karachi, Pakistan. The study recommends that organizations should formulate and implement the kind of policies that ensures the autonomy and due recognition of the employees from time to time, which in turn could help organization to motivate their employees, so that the organization performance can be fuelled.
For most of its history, Gwadar was a small to medium-sized settlement with an economy largely based on artisanal fishing. The strategic value of its location was first recognized in 1954 when it was identified as a suitable site for a deep water port by the United States Geological Survey at the request of Pakistan while the territory was still under Omani rule. The area’s potential to be a major deep water port remained untapped under successive Pakistani governments until 2001, when construction on the first phase of Gwadar Port was initiated. The first phase was inaugurated by General Parvez Musharraf in 2007 at a total cost of $248 million. The port remained underutilized after construction for a variety of reasons, including lack of investment, security concerns, and the Government of Pakistan’s failure to transfer land as promised to the port operator, Port of Singapore Authority.
The Orinoco River is one of the longest rivers in South America at 2,140 kilometres (1,330 mi). ….. “The Waters and Sediments of the Rio Orinoco and its major Tributaries, Venezuela and Colombia.” United States Geological Survey …