Hi,
3-phase sinusoidal voltage is applied to core type three phase transformer that can not itself give rise to any 3rd harmonic current. Also the Triplen flux in core type 3 phase transformer is precluded. The return paths of these fluxes lies outside cores through the air or oil and the walls of the tank. These paths are of very high reluctance and there is a strong tendency to retain a sinusoidal flux and emf. Then how third harmonic emf is induced to circulate non sinusoidal magnetizing current ( with third harmonic current) to have sinusoidal flux ( not flat topped) so that secondary induced voltage will be sinusoidal. Please explain. Little confusing!!
3-phase sinusoidal voltage is applied to core type three phase transformer that can not itself give rise to any 3rd harmonic current. Also the Triplen flux in core type 3 phase transformer is precluded. The return paths of these fluxes lies outside cores through the air or oil and the walls of the tank. These paths are of very high reluctance and there is a strong tendency to retain a sinusoidal flux and emf. Then how third harmonic emf is induced to circulate non sinusoidal magnetizing current ( with third harmonic current) to have sinusoidal flux ( not flat topped) so that secondary induced voltage will be sinusoidal. Please explain. Little confusing!!
