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Ideal Transformer

A transformer is said to be ideal; if it has the following properties:
  1. Primary and secondary coils are lossless (i.e. R1 = R2 = 0).
  2. Primary and secondary coils have very large reactances compared to any connected impedance (i.e. L1L2M → ∞)
  3. Coupling between primary and secondary coils is perfect, i.e. k = 1 or the leakage flux is zero.
An ideal transformer is a useful approximation of a very tightly coupled transformer (k ≈1) in which both the primary and secondary inductive reactances are extremely large compared to the load impedance.

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