Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Subject: search.filters.subject.electromagnetic induction

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Design of an energy regenerative system for a robotic leg prosthesis
    (Institute of Electrical and Electronics Engineers Inc., 2018) Kulkarni, A.S.; Kulkarni, S.M.
    The number of lower limb amputations have significantly increased over the years and this calls for improvement in the technology of prosthetic devices. Compared to the rudimentary passively operated devices, the latest active prostheses require electrical energy supplied from the battery for various tasks like operating motors, clutches and microprocessors. The objective of this study is to increase the energy efficiency of the device by employing a mechanism which will help regenerate energy so that the system's dependence on an external battery is reduced. A crank slider mechanism is appended to the prosthetic leg and the linear motion of the slider is used to harness energy using the principle of electromagnetic induction. A permanent magnet is included in the slider which moves interior to a coil and generates a voltage. The mechanism will be actuated due to the motion of the knee motor. The supercapacitor technology is used to store and supply this energy at regular intervals. A dynamic simulation is carried out in MATLAB to investigate the energy regenerated in the prosthetic device while the amputee walks, runs, sprints or climbs the stairs up and down. Single and multiple coil models are designed and tested for best performance statistics. Also, extra energy spent by the motor to carry the weight of the mechanism and to overcome friction is computed. Analysis of all the above factors for various human motions will verify the usefulness of the proposed system and this will mark an establishment of an electrically regenerative robotic leg prosthesis. © 2017 IEEE.
  • No Thumbnail Available
    Item
    Analysis of Wireless Charging System for Low-Power Appliances
    (Institute of Electrical and Electronics Engineers Inc., 2024) Mangamuri, R.; Kuriti, C.S.; Divvi, S.S.; Mallikarjuna, B.; Kishan, D.
    Wireless power transfer stands out as a transformative technology that provides a hassle-free, secure, and effective method for charging of power appliances without the constraints of cables. In this paper, performance analysis of a wireless mobile charging system (lower power appliances) based on a well-established principle electromagnetic induction has been carried out. The system comprises transmitter and receiver circuits featuring wireless power transfer coils. These coils are designed and simulations using ANSYS Maxwell software to analyze the impact of coil misalignment on mutual inductance and coupling coefficient variations of the wireless charging system. The electromagnetic coupled coils are deployed in a charging circuit model designed in MATLAB/Simulink model to demonstrate its dynamic behaviour, showcasing the system's capability to generate a stable 5 V DC voltage for lower power appliances. This study highlights the practicality of optimizing the design of wireless charging system. © 2024 IEEE.