Sumeet Khalid, Faisal Khan, Zahoor Ahmad and Basharat Ullah
For compactness and ease in assembling, a novel miniature size tubular moving magnet linear oscillating actuator (MT-MMLOA) design for miniature linear compressor application is…
Abstract
Purpose
For compactness and ease in assembling, a novel miniature size tubular moving magnet linear oscillating actuator (MT-MMLOA) design for miniature linear compressor application is proposed in this paper.
Design/methodology/approach
This MT-MMLOA design possesses a modular C-core stator structure having separation at the middle. Axially magnetized tubular permanent magnets are accommodated on the mover. To improve the output parameters of the linear oscillating actuators (LOA), all the design parameters are optimized using a parametric sweep. Finite element analysis of the proposed design is performed to examine the magnetic flux density as well as thrust force under both static and dynamic analysis within the intended stroke range.
Findings
Compared to conventional LOA for miniature compressors, the motor constant of the proposed LOA is 37 N/A that is 85% greater while keeping the same size of LOA. Permanent magnet volume used in the investigated topology of LOA is 26% reduced. Additionally, the overall volume of the machine is 10.3% decreased. Furthermore, the proposed topology is simple, inexpensive and easy to manufacture.
Originality/value
Electromagnetic performance comparison with different topologies proposed earlier in literature is carried out to prove the performance superiority of the proposed design.
Details
Keywords
Sumeet Khalid, Faisal Khan, Basharat Ullah, Zahoor Ahmad and Siddique Akbar
This paper aims to provide an overview of the recent developments and new topologies of single-phase moving magnet linear oscillating actuators (MMLOAs). The key advantage of the…
Abstract
Purpose
This paper aims to provide an overview of the recent developments and new topologies of single-phase moving magnet linear oscillating actuators (MMLOAs). The key advantage of the MMLOA when compared with conventional LOA is the absence of screws, gears and crankshaft mechanism, which results in fewer mechanical parts, simple structure, easy fabrication, lower noise levels and negligible frictional losses.
Design/methodology/approach
The review included papers up to August 2021. The structural designs of alternative topologies are deliberated in detail, and their relative merits and demerits are evaluated. Specific design issues, including pole and tooth number combinations, stroke length, magnet pole ratio and split ratio, are investigated. The imperative phenomena of the resonance, as well as the adjustable stroke, are also discussed in detail.
Findings
The electromagnetic performance in terms of thrust force of selected MMLOA topologies is compared. It is observed that the MMLOA with flux bridge topology has the highest thrust force of 365 N because of the large volume of the permanent magnets (PMs) used, which consequently increased the mass of the mover but based on overall performance analysis, single-phase end ferromagnetic Halbach surface-mounted PM LOA has the highest efficiency around 92%.
Originality/value
This review provides a comparative analysis for different tubular MMLOA topologies based on design construction and their electromagnetic performances.
Details
Keywords
Jeevan Jyoti, Poonam Sharma, Sumeet Kour and Harleen Kour
Organizations try to appoint individuals who fit in with their values and goals. Employees who do not fit in with the organization's core values and goals prefer not to stay on…
Abstract
Purpose
Organizations try to appoint individuals who fit in with their values and goals. Employees who do not fit in with the organization's core values and goals prefer not to stay on for a longer period of time. The present study is an attempt to explore the impact of person–job (P–J) fit on organizational commitment through job involvement and career commitment with an application of a serial multiple mediation model.
Design/methodology/approach
Data have been collected through a structured questionnaire. The population comprised the teachers, working in the higher education sector. The different constructs used have been duly validated with the help of exploratory and confirmatory factor analyses. Further data reliability and scale validity have been checked too. In order to test the serial multiple mediation model, the authors adopted a regression-based approach and bootstrapping method suggested by Hayes (2012; 2013). Accordingly, PROCESS developed by Hayes (2012) has been used.
Findings
The results revealed that job involvement and career commitment mediate the relationship between P–J fit and organizational commitment individually as well as together.
Research limitations/implications
The present study is confined to government degree colleges only. The element of subjectivity might not have been checked completely as teachers have responded on the basis of their own experience and perceptions regarding the items in the questionnaire. The study is cross sectional in nature.
Practical implications
The paper addresses the interest of wide spectrum of stakeholders including the management, organizations and employees. So, the authors have extended general implications, which are for all those organizations that want to improve person–organization (P–O) fit and commitment of their employees. These implications will help organizations to take specific initiatives to improve the P–J fit of their employees, which will subsequently enhance their commitment level.
Originality/value
The findings of the present study will help the stakeholders in the higher education sector to identify best employees and undertake the initiatives to generate better job involvement and commitment, which will be a win–win strategy for both (employees as well as the organizations).