ELECTRIC WHEEL CHAIR
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Date
2015
Authors
Hamza Khalaf
Wade Suleiman
Mohammed Harb
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Abstract
The present day society demands the people to be independent, irrespective of their natural challenges, mentally or physically. Physically impaired people have to rely on someone for fulfilling their even minor needs. The probability of them to go and interact with the outside world is very minimal, unless they are provided with modern moving tools such as a Wheel Chair. There are two possibilities of either using manual driven or electric powered driven wheel chairs. The former solution is only for the people who have disability in lower limbs and also long term usage poses further health problems. Additionally the efficiency of the manual driven wheel chairs are merely 10-20%. Thus the electric wheel chairs are more popular in such circumstances. Electric wheel chairs (EWC) provide functional mobility for people with both lower and upper extremity impairments. EWC are becoming increasingly important as more users transition from manual mobility to electric powered mobility specially in Palestine which has high percent of disabled people due to many reasons. Much research effort has been put toward the development of controlling the EWC. Advances have been made in the design of EWC over the past two decades, yet the controlling of these wheel chairs have not improved substantially. This project is thus aimed at the development of more precise controlling of EWC to meet their specific requirement and to make it affordable. More sophisticated variable speed electric drive is required for controlling EWC. Reversing, braking for electric motors and regenerating power. So, light weight components with controlled speed and directions wheel chair is being implemented, also chair could be built with any dimensions for any human weight, different weights and dimensions means different power The social need is the independence of the physically challenged people. The mobility of the physically impaired people is made possible by the use of wheelchairs. Initially manual driven wheelchairs were used by physically handicapped people. However, the electrically driven wheelchairs are gaining popularity in the society. With the advent of fast and reliable power semiconductor switching devices, the power electronic converters are increasingly used for the control of electric motors. Lot of research effort has been put towards the development of fast and simple motor speed control methods. This project is also aimed at the development of advanced control algorithm for fast and simple speed control of DC motor driving the wheelchair. Studying wheelchair's elements was considered to explain advantages and disadvantages for them to know how choose elements and develop powered wheelchair. This project is a key for implementation and development of wheelchairs. In the near future a wheelchair will be able to go up stairs and down stairs as well.
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