Abstract
Changing a time-varying magnetic field induces an electromotive force (EMF) in non-magnetic conductive materials, resulting in an eddy current across the conductor. Thus, electromagnetic damping can be used as viscous damping. This study theoretically and experimentally investigates the electromagnetic damping characteristics of a bobbin-wounded coil with an attached cantilever beam floating over a permanent magnet; the beam is balanced by electromagnetic force compensation (EMFC) instead of applied weight. System identification is carried out for the mass (m), damping coefficient (c), and spring constant (k) values. The presence of a back EMF seen in either conductive or non-conductive material responses in the experiments includes the step input and corresponding output responses to measure the electromagnetic damping force with and without a voice-coil actuator (VCA). The results were validated using bobbins of conductive (aluminum) and non-conductive (plastic) materials. The experimental results for the conductive material show that the electromagnetic damping force is 10 times greater than that of the non-conductive material; the opposite was true in the case without a VCA, where the force was almost zero for the non-conductive material. In conclusion, conductivity is directly related to the electromagnetic damping force, which affects the performance of a VCA.
Highlights
We investigated electromagnetic damping balancing-type scale dealing with an electromagnetic force compensation (EMFC)-type load cell to balance the scale as the balancing-type scale dealing with an EMFC-type load cell to balance the scale as the Voice-Coil Actuator (VCA) operates
The experiment was performed using variable direct current (DC) power supply for different current values to the VCA; the force generated was determined by a load cell in a gram force and the value was displayed on a connected digital indicator
According to the results obtained from the conductive and non-conductive materials, we concluded that if non-conductive material is used, we can obtain a smoother response and linear behavior than if conductive material is used. It was determined based on the cantilever beam with an attached bobbin experiment, simulation and theoretical analyses, that preliminary electromagnetic damping tests with and without voice coil actuator using different materials for the bobbin, checking electromagnetic damping force and its impact on system performance, as well as the conductivity of the materials, all play an important role in achieving a fast time response
Summary
Scale and balance analogs are used to weigh small items such as minor food ingredients as well as large items the size of animals and people. The weighing attached pan is attached to an electromagnetic coil through which electric current flows. An electromagnetic compensated weighing cellapplications is used frequently if high accuracy must be achieved in weighing applications Such are check-weighed and balanced in achieved in weighing applications. Three created by a permanent magnet is calculated and the electromagnetic damping is measured different conductive coils, including a cylindrical, square tube, and circular sheet were employed accurately. The induced employed to determine the effect of the coil shapes on the vibration damping of the beam [8]. A electromagnetic force (EMF) acting on the electric wire was effective in suppressing the beam’s theoretical model for the eddy current damper (ECD). The induced electromagnetic force (EMF) acting on the electric wire was effective in suppressing the beam’s vibrations [10]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.