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MMLU-Pro / 11463 / A six-pole dynamo, with interpoles, requires 360 inductors on its armature, with…

Problem

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question

A six-pole dynamo, with interpoles, requires 360 inductors on its armature, with three turns per coil and two coil sides per slot. (a) Determine the number of coils, slots, and commutator bars. (b) Select suitable pitches for a simplex lap winding.

category

engineering

options

  1. Coils = Bars = Slots = 180, Front pitch = 8 slots for progressive and 10 slots for retrogressive winding, Commutator pitch = 3 bars
  2. Coils = Bars = Slots = 72, Front pitch = 9 slots for progressive and 10 slots for retrogressive winding, Commutator pitch = 2 bars
  3. Coils = Bars = Slots = 90, Front pitch = 11 slots for progressive and 13 slots for retrogressive winding, Commutator pitch = 2 bars
  4. Coils = Bars = Slots = 80, Front pitch = 12 slots for progressive and 14 slots for retrogressive winding, Commutator pitch = 2 bars
  5. Coils = Bars = Slots = 120, Front pitch = 7 slots for progressive and 9 slots for retrogressive winding, Commutator pitch = 1 bar
  6. Coils = Bars = Slots = 30, Front pitch = 8 slots for progressive and 10 slots for retrogressive winding, Commutator pitch = 1 bar
  7. Coils = Bars = Slots = 45, Front pitch = 10 slots for progressive and 12 slots for retrogressive winding, Commutator pitch = 1 bar
  8. Coils = Bars = Slots = 120, Front pitch = 10 slots for progressive and 12 slots for retrogressive winding, Commutator pitch = 2 bars
  9. Coils = Bars = Slots = 60, Front pitch = 9 slots for progressive and 11 slots for retrogressive winding, Commutator pitch = 1 bar
  10. Coils = Bars = Slots = 100, Front pitch = 11 slots for progressive and 13 slots for retrogressive winding, Commutator pitch = 2 bars

src

stemez-ElectricalMachines

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