Transformer device and circuit apparatus used for controlling transformer

Abstract

The invention provides a transformer and a circuit device which is used to control the transformer, said transformer includes a bobbin, a iron core group, a coil group, the bobbin possesses a central hole which extends along the length direction, a first coiling part which surrounds the central hole, a second coiling part which surrounds the central hole, at least one third coiling part which is between the first coiling part and the second coiling part and several down-lead terminals which are at the two sides, the coil group possesses a first side magnetizing coil which enwinds the first coiling part, a secondary side inducing coil which enwinds the second coiling part, and accessorial coil which enwinds the third coiling part, the intertwist mode of the accessorial coil is vertical with the first side magnetizing coil and the secondary side inducing coil, thus adjusting the leaked flux, and the accessorial coil can be adjusted by adjusting a drain inductance adjusting unit to control the flux leaked, the needed drain inductance can be obtained by adjusting the leaked flux.

Description

technical field [0001] The invention relates to a transformer, in particular to a transformer used in a power conversion module requiring leakage inductance characteristics and a circuit device for controlling the transformer. Background technique [0002] Such as figure 1 , 2 As shown, the first conventional transformer 1 includes a bobbin 11 , two iron cores 12 , a primary excitation coil 13 , a secondary induction coil 14 , an insulating film 15 , and a casing 16 . [0003] The winding frame 11 is a hollow frame body, and has a plurality of partition plates 111 to distinguish two winding parts 112 , 113 , and a plurality of lead terminals 114 spaced apart from each other on both sides. [0004] Its assembly is to wind two enameled wires 131, 141 with different wire diameters on the winding parts 112, 113 to form the primary side excitation coil 13 and the secondary side induction coil 14, and the secondary side induction coil 14 is Multiple layers are wound on top of e...

AI Technical Summary

Problems solved by technology

[0008] This type of transformer uses the magnetic circuit formed by the iron core group 22 to separate the primary side excitation coil 23 and the secondary side induction coil 24, so as to increase the magnetic branch path of the leakage magnetic flux A, and utilizes the second magnetic circuit of the second iron core 222 The purpose of the magnetic permeability of the convex part 2222 is to increase its leakage inductance, but this also reduces the coupling effect, because the magnetic permeability element is used to increase the leakage magnetic flux, and its magnetic permeability is between 2000 and 5000, which is very high In practical applications, the accuracy is not easy to control, resulting in poor efficiency

[0009] As can be seen from the above, a general transformer includes a coil wound on a bobbin frame and an iron core group surrounding the bobbin frame, and the winding method of the coil needs to form at least two windings, each of the coils The winding direction is at least perpendicular to one core part, so as to facilitate the magnetic field lines generated by the induction coil of the core part, that is, the winding methods of the primary side excitation winding and the secondary side induction winding correspond to each other, so as to facilitate the magnetic conduction of the core group to generate Coupling effects (such as Figure 4 As shown, that is, the coupled magnetic flux M), and use the turns ratio of each winding to obtain the required voltage, and then use the application of the core group to increase the effective flux change to improve the efficiency of power conversion. However, the winding The significance of the mutual correspondence of the coils is to improve the coupling effect. However, the leakage inductance will be generated in the actual use of the transformer after production, which will cause losses. The loss of inductance uses the resonance principle as a power conversion application to effectively control the leakage inductance problem, which is the goal shared by all industries

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