Contents
- 1 What is function of air gap between stator and rotor in the induction motor?
- 2 Why do motors have air gaps?
- 3 Why we should maintain air gap?
- 4 When the air gap is smaller in induction motor then it’s?
- 5 Why does the stator need to be unloaded from the rotor?
- 6 What happens when the air gap is too small?
What is function of air gap between stator and rotor in the induction motor?
Air gap is needed in order to protect the rotor and stator to strike each other while rotor being rotating at very high speed. The length of air gap can be a deciding factor for losses of magnetic flux taking place in the two circuits. Length of air gap can also be decided on the cooling required for the system.
Why do motors have air gaps?
The primary role of the air gap is to keep the rotor from rubbing on the stator. Air gap provide more reluctance to the stator flux. As a result NO LOAD CURRENT increases.
Why the length of air gap in an induction motor is kept minimum possible range?
Why Air Gap Length is kept Minimum for Induction Machine? The induced EMF in the rotor winding or rotor bars is due to mutual induction caused from the rotating magnetic field produced by the stator winding. Thus, an IM can be treated as a Rotating Transformer as the EMF induced in the rotor is by Mutual Induction.
Is used to measure the gap between stator and rotor?
Capacitive sensors from Micro-Epsilon designed for non-contact displacement and distance measurements reliably monitor the operation. Therefore, the sensors are used to measure the distance between the stator and rotor and to monitor the so-called rotor gap.
Why we should maintain air gap?
The air gap refers to an actual physical gap in an electric motor that separates the moving rotor and the stator core. This gap is a necessary part of motor design and the size of the air gap is one of the keys to motor performance and reliability.
When the air gap is smaller in induction motor then it’s?
When air gap is smaller in induction motor then its magnetizing current reduces.
What is the air gap in a motor?
The air gap refers to an actual physical gap in an electric motor that separates the moving rotor and the stator core. This gap is a necessary part of motor design and the size of the air gap is one of the keys to motor performance and reliability.
Why is the air gap between stator and rotor called air core?
Since motors doesn’t have any sort of Materialistic core, the airgap between the stator and rotor acts as core and therefore it is called as air core.
Why does the stator need to be unloaded from the rotor?
When a stator rotates in a magnetic flux, the stator itself becomes a magnet and repels its own magnetic flux from flowing through it. This repulsion of magnetic flux, and the gap, causes heat, which needs to be unloaded from the stator.
What happens when the air gap is too small?
In addition, if the rotor is eccentric relative to the stator and the air gap is too small, the stiffness of the shaft might be overcome by the resulting unbalanced magnetic pull. This, in turn, leads to damage resulting from the rotor striking the stator as it is pulled out of place by the magnetic forces.