Function of a compensating winding
In an electrical machine, a compensating winding is used to compensate for the effects of armature reaction in the machine.
The armature reaction generates a demagnetizing effect on the field poles of the machine which can affect the performance of the machine. The compensating winding is placed in a way that its flux is perpendicular to the flux generated by the armature winding. This helps to neutralize the effects of the armature reaction on the field poles by producing a counteracting magnetic field.
The function of the compensating winding is to reduce the distortion in the flux produced by the main winding and to keep the voltage and current in the machine stable under varying loads. It helps to improve the efficiency and performance of the machine.