What happens when induction motor is loaded?
As the load is increased the rotor speed is slightly reduced. The emf induced in the rotor causes the current increased to produce higher torque, untill the torque developed is equal to torque required by load on motor. CIRCUIT DIAGRAM : Instruments connected in the circuit serve the function indicated against each.
What happens when mechanical load is added to a Scim?
During normal running conditions, when the motor load increases, the rotor slows down, more lines of magnetic force cut through the rotor bars and hence, generate more torque (to a point). As current rises, the rotor and/or the stator starts to saturate and the amount of torque generated per amp starts to diminish.
What happens to the speed of three phase induction motor when the load is placed on it?
An induction motor is known for its constant speed operation. Therefore loading the motor normally will cause transient decrease in speed and due to this increase in load, the motor will draw equivalent amount of current to maintain the torque and hence the speed.
What is mechanical load in induction motor?
1. The efficiency of the induction increases when the mechanical load increases because as the motors load increases, its slip increases, and the rotor speed falls. Since the rotor speed is slower, there is more relative motion between the rotor and the stator magnetic fields in the machine.
How does voltage affect the rotor speed of an induction motor?
When the motor is loaded the rotor speed drops and induces more voltage in the rotor that will produce more rotor current to increase the torque produced to counter act the mechanical load torque. When the voltage drops the rotor speed will decrease because the electrical torque produced is proportional to the square of the voltage.
What happens to an induction motor under no load?
Under no load, does an induction motor run exactly at its synchronous speed (i.e. relative field speed) or at a speed that is close to the synchronous speed but slightly less? Thanks for your time. What happens when the rotor rotates at synchronous speed (or what does not happen) ?
What makes an induction motor more efficient than a regular motor?
The increase in the rotor magnetic field tends to increase the overall torque induced in the motor. Ultimately induction motors are more efficient when they are running closer to synchronous speed i.e. the pullout torque is near synchronous speed.
What happens to the torque of an induction motor when there is no torque?
At synchronous speed, the slip is equal to 1 and so the torque is 0. If there’s no torque, I think the motor’s speed will decrease because of air friction. In order to have torque (and keep the motor running at a constant speed), there needs to be a small difference between the synchronous speed and the actual mechanical speed of the motor.