What is flux in induction motor?

What is stator flux?

Abstract: Direct stator flux and torque control (DSFTC) is a novel technique for the control of a voltage inverter-fed induction motor (IM). … The relationships between the drive performance, such as losses and switching frequency, and the amplitude of the hysteresis bands of the flux and torque controllers are given.

What is rotor flux?

Rotor flux (or flux in general) is a measure of the number of magnetic lines of force being created by the magnetic field in the rotor, and is measured in units of Webers. “Flux density” is obviously the density of these “lines of force”, which is measured in units of flux per area.

How is flux produced in induction motor?

In an induction motor, when AC supply is given to the the stator, magnetic flux is produced which is revolving at synchronous speed.

What is flux with example?

Flux is a chemical purifying agent, flowing agent or cleaning agent. Most commonly, it is used in metal joining and metallurgy. Some examples of flux include: Ammonium chloride. Zinc chloride.

What is motor flux current?

Flux current, simplistically described, is the portion of the total current which magnetizes the motor. The efficiency of any motor will improve if more of the total current is in phase with the output voltage.

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How do you calculate synchronous speed?

The synchronous speed of an AC motor is determined by the frequency of the source and the number of poles. The RPM is calculated by multiplying the frequency times 60 and dividing by the number of pairs of poles.

When load on an induction motor is increased?

The region (extending from s = sm to s = 1) is called unstable region. In this region with the increase in load, slip increases but torque decreases. The result is that the motor could not pick up the load and slows down and eventually stops.

Why the rotor flux is lagging with respect to stator flux of an induction motor?

The relative speed between stator RMF and rotor conductors causes an induced emf in the rotor conductors, according to the Faraday’s law of electromagnetic induction. The rotor conductors are short circuited, and hence rotor current is produced due to induced emf. … This rotor flux lags behind the stator flux.

What is magnetic flux linkage?

Flux linkage is the linking of the magnetic field with the conductors of a coil when the magnetic field passes through the loops of the coil, expressed as a value. The flux linkage of a coil is simply an alternative term for total flux, used for convenience in engineering applications.

What is DQ model of induction motor?

The d,q model is employed to mathematically describe the behavior of the induction motor in the stationary and synchronous reference frame. The stator and rotor currents are high oscillatory in the stationary reference frame.

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