Transformer Eddy current losses are created due to ________

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RRB ALP CBT 2 Electronic Mechanic Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. secondary winding 
  2. copper
  3. core
  4. primary winding 

Answer (Detailed Solution Below)

Option 3 : core
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Iron losses or core losses of the transformer includes both hysteresis and eddy current losses.

Eddy current losses: These are basically I2R losses present in the core due to the production of eddy current in the core.

Where, η = Steinmetz constant

B= maximum flux density

f = frequency of magnetization or supply frequency

t = thickness of the core

maximum flux density (Bm) is directly proportional to the V/f ratio.

Hysteresis losses: These are due to the reversal of magnetization in the transformer core whenever it is subjected to alternating nature of magnetizing force.

Where, η = Steinmetz constant

Bm = maximum flux density

f = frequency of magnetization or supply frequency

v = volume of the core

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