不计铜损,即变压器的线圈内阻很小,可以忽略,在有电流通过时不产生焦耳热.不计铁损,即变压器的铁芯内不产生涡流,无热损耗.不计磁漏,即磁感线全部集中于铁芯内,原副线圈的磁通量总保持相同.具备了上述条件的变压器称为理想变压器. Excluding copper loss, that is, the internal resistance of the transformer coil is very small and can be ignored. When there is a current passing through, no Joule heat is generated. Iron loss is not accounted for, that is, no eddy current is generated in the iron core of the transformer, and no heat loss occurs. Magnetic leakage is not counted. The lines of inductance are all concentrated in the core, and the flux of the original secondary coil remains the same. The transformer with the above conditions is called an ideal transformer.