Armature reaction
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The document discusses flux in a generator or motor due to field and armature currents. It shows the flux produced by the field current alone around the d-axis and the flux produced by the armature current alone around the q-axis. It then shows the resultant flux vector from the combination of main field and armature field fluxes. The document also mentions demagnetizing and cross-magnetizing conductors and calculating cross-magnetizing amp-turns.
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Armature reaction
- 1. Field MMF (Fm) A d- axis O Flux due to field current alone GNA MNA (At no load) Main Field Flux produced by field m.m.f at no load d- axis
- 2. N S O d- axis Armature MMF (Fa) q - axis GNA BFlux due to Armature current alone d- axis Armature Field Flux produced by Armature m.m.f with field unexcited q - axis GNA
- 3. d - axis Fa m A d- axis F GNA MNA (At on load ) O FR θ Resultant of Main Field Flux and Armature Field Flux
- 4. Generator Direction x x x x x x N S Polar Axis Interpolar Axis GNA MNA Polar AxisMotor Direction Bm Fa Ba ϕ Flux distribution and Flux waveforms due to Field and Armature currents ϕm ϕa
- 5. Peaky wave Mmf & B Resultant Flux waveform ϕ
- 6. Demagnetizing and Cross-magnetizing Conductors:
- 8. Calculation of Cross-magnetizing Amp-Turns