# Quick Answer: What is slip in DC motor?

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## What is slip on motor?

“Slip” in an AC induction motor is defined as:

As the speed of the rotor drops below the stator speed, or synchronous speed, the rotation rate of the magnetic field in the rotor increases, inducing more current in the rotor’s windings and creating more torque. Slip is required to produce torque.

## What is slip formula?

Slip speed is the speed difference between the Synchronous speed and Rotor speed. Slip speed = Synchronous speed – Rotor speed = Ns -N. Slip, s = (Ns – N) / Ns.

## Do DC motors have slip?

Another thing you should remember is that due to this role of a slip ring in a DC motor, slip rings in DC motor are also known as commutators because of their design. … Slip rings do this by reversing the current at the point when the coil moves at about 90-degree angle to the magnetic field.

## Can slip be negative?

If slip is negative, the “input power” to the electrical terminals will be negative, implying that power is flowing out of the electrical terminals. Rotational losses are 2450W.

## What happens when slip is zero?

Zero slip means that rotor speed is equal to synchronous speed. If rotor is rotating at synchronous speed in the direction of rotating magnetic field the, there will be no flux cutting action, no emf in the rotor conductors, no current in rotor bar conductor and hence no development of electromagnetic torque.

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## What is full load slip?

The slip corresponding to full load speed of th motor is called full load slip. Example 1 : A 4 pole, 3 phase induction motor is supplied from Hz supply. Determine its synchronous speed. On full load, its speed is observed to be 1410 r.p.m. calculate its full load slip.

## What is difference between slip ring and commutator?

The main difference is that commutator is used for the conversion of AC to DC. … Slip rings are used in AC motors to provide a continuous transfer of power whereas the commutators are used in DC motors to reverse the polarity of the current in the armature windings.