Page 210 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

1 Resistance commutation
• Reactance voltage in the short circuited coil creates commutation problem

• Change in direction of current before and after short circuit creates reactance voltage.
• Increased brush resistance in resistance commutationslow down the change in direction of current
• Reduces the reactance voltage
• Reduces commutation problem

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CITS : Power - Electrician & Wireman - Lesson 30-37