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Electrical Engineering Basics
Published in S. Bobby Rauf, Electrical Engineering for Non-Electrical Engineers, 2021
Similar to capacitor, an inductor can be viewed as an energy storage device, which can be applied in DC or AC applications. Unlike a capacitor—where energy is stored in form of separation of charges, resulting in a potential difference—in an inductor, the energy is stored in the magnetic field that is produced through the flow of electric current. This phenomenon was first discovered by Michael Faraday in 1831. The magnetic field—which can be referred to as magnetic flux—is not established instantaneously upon flow of current through an inductor. Instead, much like a “time constant,τ” based charge build up in a capacitor, the current change and magnetic field build up in an inductor ramps up, or down, at a non-linear rate. This non-linear rate is a function of the inductor’s time constant, τ. Inductor’s time constant concept will be explained later in this chapter.
Capacitors and Inductors
Published in Kevin Robinson, Practical Audio Electronics, 2020
The unit of measure for inductors is the henry (H). Most commonly encountered inductors will have values in the millihenry (mH) range with some falling to the level of microhenries (µH). Inductors are on the whole far less commonly employed than capacitors, but there are a few interesting audio circuits which call for an inductor, often being used in some form of a filter or EQ role. Many classic wah pedals (such as the much loved Dunlop Cry Baby) use an inductor in the design of their swept filter. An interesting filter design, combining inductors and capacitors, may be heard generating the characteristic washed out high pass filter sound used to great effect by some early reggae producers. One example of this is what came to be referred to as ‘King Tubby’s big knob filter’ on account of the larger than standard pot knob used to control this particular filter on his mixing desk (Williams, 2012).
Passive electronic components
Published in Stephen Sangwine, Electronic Components and Technology, 2018
In most low-frequency electronic circuits, inductors are usually avoided altogether because of the expense and inconvenience of manufacture and because of the better control over circuit characteristics obtainable by using capacitors as the reactive elements. At higher frequencies, inductors are used as elements of tuned circuits and filters. At microwave frequencies, inductance can be obtained at minimal cost by inductive conductor patterns on circuit boards and in integrated circuits (ICs). Power inductors are used in switched-mode power supplies as described in Chapter 4. Most inductors have to be specially designed and wound for each application, although there are a few off-the-shelf inductors available with values from 1 μH to 1 mH, including surface mount versions in the smaller values, such as 10 nH. Inductors are still referred to as chokes in some applications.Although transformers are not discussed here, much of what follows about inductor manufacture is also relevant to the fabrication of small transformers for signal coupling, isolation, and impedance matching.
Implementation of Incremental Conductance MPPT Algorithm with Integral Regulator by Using Boost Converter in Grid-Connected PV Array
Published in IETE Journal of Research, 2023
Muhammad Abu Bakar Siddique, Adeel Asad, Rao M. Asif, Ateeq Ur Rehman, Muhammad Tariq Sadiq, Inam Ullah
The inductor stores the energy by the flow of electric current through it. It holds output continuously as long as possible. Therefore, the cost and value of the inductor must be chosen precisely for maintaining both price and continuous output power supply respectively while designing a boost converter. Furthermore, the peak current and frequency of the inductor should be kept in mind while designing. The inductor value is determined by the inductor charging current. The value of the inductor should be calculated as: where fs is the Switching Frequency = 5KHz, D is the Duty Cycle of Converter = 0.4, ΔiL is the Ripple Factor (20–40% of iL).
Fault Ride-Through Capability with Mutual Inductance in Low-Voltage Single-Phase Microgrid
Published in IETE Journal of Research, 2022
The mutual inductance is a circuit parameter between two magnetically coupled coils (inductors). Suppose that we have coil 1 with turns and coil 2 with turns. Coil 1 has a current which produces a magnetic flux going through one turn of coil 2. If changes, then the flux changes and an emf (potential difference) is induced in coil 2 which is given by The flux through coil 2 is proportional to the current in coil 1 where . Taking the time derivative of this, then Applying the same procedure starting with coil 2 would end up with a similar equation with an . However, the two mutual inductances are the same such that because the mutual inductance is a geometrical property of the arrangement of the two coils. Thus, the induced emf or potential difference can be given as This induced emf or potential difference has the following features: It opposes the magnetic flux change.It increases if the current changes very fast.It depends on which depends only on the geometry of the two coils rather than the current.
Experimental Testing and Analytical Solution by Means of Lambert W-Function of Inductor Air Gap Length
Published in Electric Power Components and Systems, 2018
Martin Calasan, Aleksandar Nedic
An inductor is a passive two-terminal electrical component that stores electrical energy in a magnetic field when an electric current flows through it. It typically consists of an electric conductor (for example a wire) that is wound into a coil around a core (Figure 1).