What is reactance in induction motor?
Abstract: The leakage reactance of an induction motor that determines the locked-rotor current at full voltage is generally much smaller than the reactance that determines the full-load power factor or the pullout torque.
What is stator leakage reactance?
The armature leakage reactance X1 results from stator leakage flux that crosses the stator slots, flux that passes circumferentially from tooth to tooth round the airgap without entering the rotor and flux linking the stator endwinding. X1 is a component of all the positive- and negative-sequence reactances.
What is rotor reactance?
The rotor resistance R2 is constant. It is independent of slip. The reactance of the induction motor rotor depends upon the inductance of the rotor, voltage frequency, and rotor’s current. If L2 = inductance of rotor, the rotor reactance is given by. X2=2πf2 L2 But f2=sf1 ∴ X2=2π sf1 L2=s(2π f1 L2) Or X2=sX20.
What is rotor leakage reactance?
The leakage reactance of. stator and rotor are measured as sum of stator reactance X1 and the referred reactance of rotor as X2´. The separation is done. by thumb rule.
What is motor reactance?
In electrical circuits, reactance is the opposition presented to alternating current by inductance or capacitance. Greater reactance gives smaller current for the same applied voltage.
How do you calculate stator current?
Therefore, the frequency of induced current or voltage in the stator winding is f = Ns P/120—the supply frequency. When the rotor is stationary, s = 1. Under these conditions, the per phase rotor e.m.f. E2 has a frequency equal to that of supply frequency f.
What is magnetizing reactance?
The magnetizing reactance is defined as the result of calculating the electric machine magnetic circuit. In this chapter, the magnetic circuit is calculated by the use of an electric equivalent circuit, the elements of which represent the magnetizing reactance values of magnetic circuit regions.
What is meant by leakage reactance?
: the part of the reactance of a circuit that corresponds to the leakage flux.
What is reactance in electrical engineering?
Reactance (also known as electrical reactance) is defined as the opposition to the flow of current from a circuit element due to its inductance and capacitance. Greater reactance leads to smaller currents for the same applied voltage. … The reactance is inductive if it releases energy in the form of a magnetic field.
What is electronic reactance?
reactance, in electricity, measure of the opposition that a circuit or a part of a circuit presents to electric current insofar as the current is varying or alternating. Steady electric currents flowing along conductors in one direction undergo opposition called electrical resistance, but no reactance.
What is rotor reactance in induction machine?
Rotor Circuit Model
The rotor resistance is constant and is independent of the slip. The reactance of the induction motor depends upon the inductance of the rotor and the frequency of the voltage and current in the rotor.
What is stator resistance starter?
Their purpose is to drop some voltage and hence reduce the voltage applied across the motor terminals.