Structure of main transformer composed of multiple transformers in inverter power sources

Abstract

The invention provides a structure of a main transformer composed of multiple transformers in inverter power sources. The structure comprises a plurality of transformers, primary windings of the plurality of transformers are mutually connected in parallel, and secondary windings are connected in series to serve as secondary outputs. The primary windings use enameled wires to wind on frameworks which are fixed on printed circuit boards (PCBs); wires are printed in the PCBs, copper bars are welded on the PCBs, and copper bars are connected with wires in the PCB to form secondary windings of the transformers together; and magnetic cores are sleeved on peripheries of the copper bars and pressed tightly with the copper bars, and the frames are surrounded inside the magnetic cores. The structure has the advantages that the secondary windings of the main transformer are connected in series, uneven flow phenomena caused by parallel usage of main transformers in inverter power sources are overcome, and reliabilities of main circuit are improved; copper bars and PCBs are combined to form secondary windings, so that heat-dissipation problem of primary windings and secondary windings in transformers and fixing problems of the main transformer are solved; and heat dissipation of the main transformer and whole inverter power source circuits is facilitated, and reliabilities of inverter power source circuits are improved.

Description

technical field [0001] The invention relates to a structure in which a plurality of transformers form a main transformer in an inverter power supply, and belongs to the field of inverter power supplies. Background technique [0002] In the existing inverter power supply, the main transformer sometimes needs to use two or more relatively small transformers together as a main transformer. Generally, the main transformer of the inverter power supply is connected in parallel, that is, the primary A is connected in parallel and the secondary B is also connected in parallel, such as figure 1 As shown, due to its connection method, the current flowing through each transformer is not uniform, that is, it is not equal (because the winding material of each transformer and other factors will affect its resistance). Therefore, the parameter consistency of each transformer is required to be better, so as to meet the requirements of the circuit. On the other hand, because the secondary ...

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Problems solved by technology

Therefore, it affects the stability of the main circuit

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