Transformer for switch-mode power supply, has three cores formed as separate components and with air gaps between

摘要

The transformer has a first core (1) carrying at least one primary winding (5). A second core (2) carries at least one secondary winding (4). A third core (3) is also provided. The cores (1,2,3) are separate components. The first core may be separated from the second core by an air gap (6). The second core may be separated from the third core by at least one further air gap (7). An Independent claim is included for a switch-mode power supply.