1. Linear Motor Lift System
EE4121 Individual Project
by LAU, Kin Hung D

2. Agenda Introduction Methodologies Results Evaluation Conclusion
Discussion

3. Introduction Hong Kong is density city
The demand of Lift system is high
Typical used lift system is rotary motor
High maintenance cost
This project is to study the feasibility of using linear motor to drive lift system

4. Introduction Objectives Develop a Permanent Magnet Linear Motor
Develop a program for controlling the lift system
Combine the motor and the control system
Evaluate the performance of the Linear Motor Lift System

5. Methodologies

6. Methodologies

7. Methodologies

8. Methodologies

9. Results Low Power Consumption Abnormal Operation Horizontal movement
Short operation time
Unsmooth motion
Unexpected stall in system

10. Evaluation Simplicity Efficiency Construction is, in theory, simpler
Easy for maintenance
Does not require motor bearing
Easy for cooling
Efficiency
Lower transmission loss
Performance will be lowered by End Effect
Performance will be lowered by cogging force

11. Conclusion It is worth to develop Linear Motor in Lift System
Simplicity
Efficiency

12. Discussion Further Development Future Applications
Double sides sliders
AC Induction Linear Motor Lift System
Future Applications
Linear Motor Tram
Rope-free Lift System