Armature Reaction in Alternator or Synchronous Machine

Armature winding in an electrical machine is the winding which carries the load current. Under no-load condition, the armature current is zero. But as the machine is loaded, load current flows through the armature winding and creates magnetic flux. The effect of armature winding mmf or flux on the main working flux created by field … Read more Armature Reaction in Alternator or Synchronous Machine

Why Generator Armature Winding Connected in STAR not in DELTA?

Alternator or generator armature winding is always connected in STAR not in DELTA. We know that rotating magnetic filed in the air gap can only be created if the phase winding and phase currents are 120º displaced from each other in the space and time respectively. This can be achieved either in star connection or delta … Read more Why Generator Armature Winding Connected in STAR not in DELTA?

Detrimental Effects of Armature Reaction

As discussed in earlier post, Purpose of Interpole in DC Machine, there are two types of effect of armature mmf on the main field flux: 1)      Distortion in Main Field Flux 2)      Net reduction of Main Field Flux Due to the above two effects of armature mmf, there are many detrimental effects on the Electrical … Read more Detrimental Effects of Armature Reaction