High frequency transformer with integrated rectifiers
OwnerMichel Rocheinventor
Life of this patent
Estimating the term…
Abstract
A high frequency transformer may include an integrated rectifier cell with flat windings and/or slotted copper segments stacked on a core branch to provide alternating primary and secondary windings. This reduces inductance leakage and thus increases the operating frequency of the transformer. Rectifying diodes of the rectifier cell may be arranged according to various configurations between the copper segments, and the collection plates may form one of the rectifier outputs. The other output may be provided by connecting all the midpoints of the windings with conductive spacers pressed together along a first axis. The invention is particularly advantageous in static converters, and, more particularly, in spot welding machines, for example.
Claims11
High-frequency transformer, with integrated rectifier, having primary and/or secondary windings, composed of conductive segments 3 surrounding a single magnetic-core branch, wherein it operates at a frequency of from 3 to 50 kHz and has:
- silicon rectification diodes 4, advantageously in the form of bare chips, which are directly compressed between the conductive segments 3, which can be made of copper or aluminum;
- and
- an alternating stack, on the core branch 1, of flat windings 2 and conductive plates 3, advantageously arranged according to a high number of alternations 2-3.
Dependencies are inferred from the claim text.