What
is self inductance?
is self inductance?
Self
inductance is the property of an electric circuit that opposes any change in
current in that circuit.
inductance is the property of an electric circuit that opposes any change in
current in that circuit.
Because
it will be quite apparent from the circuit diagram whether the induction action
in question customary to emit the self and simply speak of the inductance is a
property of an electric circuit, we shall require a letter symbol to represent
inductance and a unit of measurement.
it will be quite apparent from the circuit diagram whether the induction action
in question customary to emit the self and simply speak of the inductance is a
property of an electric circuit, we shall require a letter symbol to represent
inductance and a unit of measurement.
The letter symbol for inductance is L
The Henry is the SI unit of inductance
The unit symbol for Henry is H
In
the international system of units, since we define the ampere in terms of the
magnetic force between parallel current – carrying conductors, and the Weber in
terms of the voltage induced by a changing current, magnetic units are
completely compatible with electrical units. So we can define the unit of
inductance either in terms of the change in flux resulting from a given change
in current or in terms of the induced voltage resulting from a given change in
current. The general definition of the Henry is based on flux linkages, hence,
the international system of units, since we define the ampere in terms of the
magnetic force between parallel current – carrying conductors, and the Weber in
terms of the voltage induced by a changing current, magnetic units are
completely compatible with electrical units. So we can define the unit of
inductance either in terms of the change in flux resulting from a given change
in current or in terms of the induced voltage resulting from a given change in
current. The general definition of the Henry is based on flux linkages, hence,
An
electric circuit has an inductance of one Henry when a change in current of one
ampere produces a change in total flux linkage of one Weber.
electric circuit has an inductance of one Henry when a change in current of one
ampere produces a change in total flux linkage of one Weber.
The
total flux linkages of a multi-turn coil are N times as great as for a single
turn carrying the same current. Hence
total flux linkages of a multi-turn coil are N times as great as for a single
turn carrying the same current. Hence
L = N dФ – – – – – – – (i)
di
Where
L is the inductance of a circuit in Henry
L is the inductance of a circuit in Henry
N is
the number of turns linked by the magnetic flux and
the number of turns linked by the magnetic flux and
dФ is the
change in flux for a given change in current in Weber per
change in flux for a given change in current in Weber per
di` ampere.
Thus we can
also define the magnitude of the Henry completely in electrical units without
having to determine the magnetic flux
also define the magnitude of the Henry completely in electrical units without
having to determine the magnetic flux
An electric
circuit has an inductance of one Henry when current changing at the rate of one
ampere per second induces a voltage of one volt into the circuit
circuit has an inductance of one Henry when current changing at the rate of one
ampere per second induces a voltage of one volt into the circuit
