Transformers. Transformers. The "simple transformer law" relates output voltage to input voltage and turns ratio. Investigate the importance of frequency and other parameters in determining the non-ideal behaviour of transformers. The "simple transformer law".
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Using the Kirchhoff's andFaraday’s laws
No magnetic hysteresis
We also need to separate running with load and free running, as it’s particular case.
Dependence of coefficient against frequency (with load)
We used small DC voltages to measure the resistance of the winding
We will seek the solution of this equations in form:
M(mutual inductance factor) depends on frequency because of depending µ on it
Dependence of coefficient against angle dependence
We measured steel losses using the chain (right).
Dependence of dependencediffusionfluxagainst voltage
We can rebuild our chain using diffusion inductance
If we know all the coefficients, we can have as a result of our model real hysteresis loop
We can imagine a real winding as system of coils, resistances and capacitors.
Dependence of dependencesteel losses in the 2nd winding of voltage
Dependence of dependence coefficient against frequency (with load)
Unideal transformer dependence
Resistance of the winding
Losses of the flux
Losses in the core