Contents
What is magnetic field coupling?
Magnetic field coupling (also called inductive coupling) occurs when energy is coupled from one circuit to another through a magnetic field. Since currents are the sources of magnetic fields, this is most likely to happen when the impedance of the source circuit is low.
What is meant by coupled circuit?
An electric circuit is said to be a coupled circuit, when there exists a mutual inductance between the coils (or inductors) present in that circuit. Sometimes, the terms coil and inductor are interchangeably used.
What is the significance of dot mark in magnetically coupled circuit?
By this convention, a dot is placed in the circuit at one end of each of the two magnetically coupled coils to indicate the direction of the magnetic flux if current enters that dotted terminal of the coil.
What are the two types of magnetic couplings?
In addition to the two main types, magnetic couplings includes spherical, eccentric, spiral and nonlinear designs. These magnetic coupling alternatives aid in the use of torque and vibration, specifically used in applications for biology, chemistry, quantum mechanics, and hydraulics.
What is a magnetic coupling used for?
A magnetic coupling can be used to transfer power to centrifugal pumps. It consists of a primary part which is rigidly connected to the motor shaft, and a secondary part which is arranged on a shaft (see Pump shaft) together with the impeller. Both the primary and the secondary parts are fitted with permanent magnets.
What materials are good magnetic couplers?
The magnets used in magnetic couplings compose of rare earth materials such as neodymium iron boron or samarium cobalt. Barriers that exist between the magnetic pairs are made of non-magnetic materials. Examples of materials that are not attracted by magnets are stainless steel, titanium, plastic, glass and fiberglass.
Where can I get a PDF of magnetic coupled circuits?
You can get Magnetic Coupled Circuits downloaded in PDF for that your GATE Preparation is made easy. Before you start reading AC Transients though, you need to understand the basics on which this topic is built, using the articles listed below.
Why is a magnetically coupled circuit called self inductance?
5. 5 a) Self Inductance It called self inductance because it relates the voltage induced in a coil by a time varying current in the same coil. Consider a single inductor with N number of turns when current, i flows through the coil, a magnetic flux, Φ is produces around it. i (t) Φ + V _ Fig. 1
What causes mutual flux in a magnetic coupled circuit?
If the current enters (or) leaves the dots in both the coils simultaneously, then mutual flux will be added to self-flux otherwise it will oppose the self-flux. Mutual flux in one coil is due to the current flowing through the other coil.