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Three-Phase Power

Three-Phase Power. Definitions. 4 wires 3 “active” phases, A, B, C 1 “ground”, or “neutral” Color Code Phase A Red Phase B Black Phase C Blue Neutral White or Gray. Phasor Diagram. Delta-Connected Sources. V LINE = V . Phasor Diagram, V AB as reference. Look at the Currents.

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Three-Phase Power

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  1. Three-Phase Power ECE 442

  2. Definitions • 4 wires • 3 “active” phases, A, B, C • 1 “ground”, or “neutral” • Color Code • Phase A Red • Phase B Black • Phase C Blue • Neutral White or Gray ECE 442

  3. Phasor Diagram ECE 442

  4. Delta-Connected Sources VLINE = V ECE 442

  5. Phasor Diagram, VAB as reference ECE 442

  6. Look at the Currents I = ILINE / 3 ECE 442

  7. Y-Connected Sources ECE 442

  8. Phasor Diagram with A as reference ECE 442

  9. Complete Phasor Diagram VLINE = 3V ECE 442

  10. Look at the Currents I = ILINE ECE 442

  11. Three-Phase Bridge Rectifier ECE 442

  12. Conduction Sequence ECE 442

  13. Average Output Voltage, Vdc ECE 442

  14. rms Output Voltage ECE 442

  15. Diode Currents ECE 442

  16. Transformer Secondary Current ECE 442

  17. Instantaneous Output Voltage ECE 442

  18. ECE 442

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