Magnetic Induction
Magnetic Induction - Related Videos
11:33
Inductance
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN This experiment will use inductive coils to demonstrate the concept of inductor and inductance. Magnetic induction will be demonstrated using a rod magnet inserted into or extracted away from the core of a coil to induce a transient electromotive force (emf) voltage in the coil, measured by a voltmeter. This experiment will also demonstrate the mutual inductance between...
11:18
AC Induction Motor Characterization
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. The objectives of this experiment are to find the equivalent circuit parameters of a three-phase induction motor using the per-phase equivalent circuit and tests similar to those used in transformer characterization. In electrical engineering, an equivalent circuit (or theoretical circuit) can be determined for a given system. The equivalent circuit retains all characteristics of the original system,...
08:28
Expansion and Adipogenesis Induction of Adipocyte Progenitors from Perivascular Adipose Tissue Isolated by Magnetic Activated Cell Sorting
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Cited by 5 •
2017
Here we report a method for isolation of Adipocyte Progenitor Cell (APC) populations from Perivascular Adipose Tissue (PVAT) using Magnetic-activated Cell Sorting (MCS). This method allows for an increased isolation of APC per gram of adipose tissue when compared to Fluorescence-Activated Cell Sorting (FACS).
10:41
Characterization of Magnetic Components
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. The objective of this experiment is to achieve hands-on experience with different magnetic components from design and material perspectives. This experiment covers B-H curves of magnetic material and inductor design through identifying unknown design factors. The B-H curve of a magnetic element, such as an inductor or transformer, is a characteristic of the magnetic material forming the core around...
10:27
VFD-fed AC Induction Machine
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. Variable frequency drives (VFDs) are a type of adjustable speed drive, which are becoming standard equipment to power most AC induction motors. VFDs are common in industrial and automation applications and typically provide robust control of the motor in speed, torque, or position modes. The VFDs tested and simulated in this experiment focus on speed and open-loop control with constant voltage to...
FAQs
Magnetic flux change speed directly controls the induced emf: a faster change produces a larger emf, while a slower change produces a smaller one, according to Faraday’s law. The relevant factor is not simply the presence of a magnetic field, but how rapidly the flux through the conductor or circuit changes. This distinction helps explain different electrical responses in comparable setups.
Lenz’s law determines the direction of the induced current rather than its magnitude. The current creates an effect that opposes the change in magnetic flux that produced it. This directional rule is important when analyzing electromagnetic energy conversion because it links the electrical response of a circuit to the magnetic change driving the induction process.
A magnetic field by itself does not guarantee an induced emf. If the magnetic flux through a conductor or circuit remains unchanged, the condition described by Faraday’s law for induction is absent. Magnetic induction therefore depends on variation in flux, making the distinction between a static field and a changing magnetic environment essential in physics analysis.
Begin by identifying the conductor or circuit and considering the magnetic flux through it. Next, determine whether that flux changes and evaluate how rapidly the change occurs, since this controls the induced emf. Finally, apply Lenz’s law to establish the direction of the response and determine whether the setup can support an induced current.
Electric generators and transformers use magnetic induction to connect magnetic fields with electrical energy. In a generator, the principle supports processes associated with producing electrical energy, while in a transformer it supports electrical-energy transfer in power systems. These applications demonstrate why changing magnetic flux is central to electromagnetic energy conversion, generation, and transmission.
Magnetic induction provides a common physical foundation for induction motors and wireless charging systems. Its role in these technologies extends the principle beyond basic circuit analysis, showing how magnetic fields can participate in practical energy-transfer and conversion systems. Studying these applications helps connect electromagnetic theory with technologies used in electrical systems and everyday devices.