Shyh-Leh Chen, Pei-Hua Lee and Chow-Shing Toh
This paper is concerned with the design and analysis of a bearingless motor.
Abstract
Purpose
This paper is concerned with the design and analysis of a bearingless motor.
Design/methodology/approach
The bearingless motor is obtained by a regular three-pole active magnetic bearing with an intentionally attached unbalanced mass on the rotor. It is the unbalanced mass that will generate the rotational torque for the motor function. Modeling and control of the unbalanced mass-type bearingless motor have been considered.
Findings
It is found through simulations that both functions of motor and magnetic bearing can indeed be achieved in this system.
Originality/value
This novel bearingless motor requires no additional windings and permanent magnets. Thus, it can greatly reduce the cost and design of the bearingless motor.
Details
Keywords
Su-Ling Fan, Wei-San Ong, Chun-Tin Wu, Nuria Forcada Matheu and Hamidreza Alavi
The purpose of this paper is to address the problems of the current facilities maintenance management (FMM) system in finding necessary information, identifying defective…
Abstract
Purpose
The purpose of this paper is to address the problems of the current facilities maintenance management (FMM) system in finding necessary information, identifying defective facilities and prioritizing maintenance work orders.
Design/methodology/approach
In this paper, in conjunction with building information modeling, a system is proposed to perform a preliminary inspection of each maintenance request, provide FMM staff with the location of the faulty facility and its associated details and provide recommendations for prioritizing repair work orders. Unity and Revit are used to implement the proposed system and a case study is conducted to demonstrate its effectiveness.
Findings
An augmented reality (AR)-FMM system was developed using the AR technique in this paper. This system provides the related information even if the FMM receives a problem report without facility information from the occupant and performs a preliminary inspection so that the faulty facility and the route to it are identified. In addition, a work order sequence of pending requests was provided. The visualization of the facility using AR technology has brought great convenience and ease to FMM staff.
Originality/value
This paper addresses the problems encountered in the current facility maintenance management system concerning AR technology.