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In electronics, electric power and telecommunication, coupling is the transfer of electrical energy from one circuit to another, or between parts of a circuit. Coupling can be deliberate as part of the function of the circuit, or it may be undesirable, for instance due to coupling to stray fields .
Hedgehog transformers are occasionally encountered in homemade 1920s radios. They are homemade audio interstage coupling transformers. Enameled copper wire is wound round the central half of the length of a bundle of insulated iron wire (e.g., florists' wire), to make the windings.
Short-circuit inductance is one of the parameters that determines the resonance frequency of the magnetic phase synchronous coupling in a resonant transformer and wireless power transfer. Short-circuit inductance is the main component of the current-limiting parameter in leakage transformer applications.
A Scott-T transformer or Scott connection is a type of circuit used to produce two-phase electric power (2 φ, 90 degree phase rotation) [1] from a three-phase (3 φ, 120 degree phase rotation) source, or vice versa. The Scott connection evenly distributes a balanced load between the phases of the source.
Regular Home Depot shoppers know all too well just how easy it is to walk inside the home improvement store and spend hundreds, if not thousands, of dollars during a shopping trip. Beyond ...
An electrical fault melts the fuse, and the device drops open to give a visual indication of trouble. Lineworkers can also manually open it while the line is energized using insulated hot sticks. In some cases, completely self-protected transformers are used, which have a circuit breaker built in, so a fused cutout isn't needed.
Coupling may be intentional or unintentional. Unintentional inductive coupling can cause signals from one circuit to be induced into a nearby circuit, this is called cross-talk, and is a form of electromagnetic interference. k is the coupling coefficient, Le1 and Le2 is the leakage inductance, M1 (M2) is the mutual inductance
Transformer coupling is an alternative AC coupling. Like RC coupling, it isolates DC between stages. However, transformers are bulkier and much more expensive than capacitors so is used less often. Transformer coupling comes into its own in tuned amplifiers. The inductance of the transformer windings serves as the inductor of an LC tuned circuit.
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