What is the inductance of a motor?

Inductance is the link between electric circuits and magnetic fields. Voltage and current sine waves are in-phase when they peak and cross the zero axis at the same time.

How is stator inductance measured?

All Answers (2) You can measure Stator Resistance by multimeter (DC-mode): Rs=U/I. You can calculate Stator Induction by Stator Current measurment in Free Run mode: X=U/I; Ls=X/(2*Pi*f) . you can get by performing No-loaad test and blocked rotor tests of IM.

What are the different types of stator winding in induction motor?

Three types of stator windings were considered in the analysis: concentric single layer winding, concentric double layer winding and fractional concentric winding.

How do you check motor winding inductance?

Or- If you don’t have inductance meter, the inductance of the coil can be measured by the following method.

1. Measure the resistance(R) of coils(phase to phase)
2. Feed AC voltage (V), 50 Hz to coils and measure the current(I)
3. Calculate impedance of the coils Z=V/I.
4. Calculate reactance(XL) of the coils by XL=√(Z^2-R^2)

What is inductance in electric circuit?

Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. An electronic component designed to add inductance to a circuit is called an inductor.

What is stator inductance?

Stator inductance estimation for permanent magnet motors using the PWM excitation. An adaptive observer is used to calculate the inductance parameters from the current measured. The proposed method uses no external injection but relies on the PWM excitation used for normal motor drive control.

How do you find the inductance of an induction motor?

For the calculated Lm = 754 uH, motor leakage inductances Lls = Llr = 76 uH and resistance Rs = Rr = 24 mΩ, the optimal slip is calculated equal to s = 5.1 Hz at rated motor speed.

What are the two types of stator windings?

Based on the motor winding connection, armature windings are classified into two types which include the following.

• Lap winding.
• Wave Winding.

Why do we measure motor inductance?

The inductance or impedance of a motor can be a key parameter during the manufacture and servicing of both AC and DC motors. The inductance of both AC and DC motors can be measured using a low voltage AC source.

Why do we test motor inductance?

Unbalanced inductance can indicate degradation of the motor core and windings as well as problems with the rotor, rotor core and rotor positioning in relation to its magnetic center. Inductance is affected by virtually everything within the motor, as can be determined by the above formula.