TWI396209B - Transformers and circuit devices for controlling transformers - Google Patents

Description

Transformer and circuit device for controlling the transformer

The invention relates to a transformer, in particular to a transformer applied to a transformer of a power conversion module requiring leakage inductance characteristics and a circuit device for controlling the transformer.

Referring to FIGS. 1 and 2, a first conventional transformer 1 includes a bobbin 11, a second core 12, a primary side excitation coil 13, a secondary side induction coil 14, an insulating film 15, and a casing 16.

The bobbin 11 is a hollow frame body and has a plurality of partition plates 111 to be divided into two winding portions 112, 113, and a plurality of lead terminals 114 spaced apart from each other.

The assembly is performed by winding two enameled wires 131 and 141 of different wire diameters on the winding portions 112 and 113 to constitute a primary side excitation coil 13 and a secondary side induction coil 14, and the secondary side induction coil 14 is A plurality of layers are wound in an overlapping manner in a continuous manner, and are covered between the layers by the insulating film 15. The cores 12 are joined to each other in a hollow portion 115 of the bobbin 11 to form a closed magnetic circuit. The primary side excitation coil 13 and the secondary side induction coil 14 are adjusted by the thickness of the partition plates 111. The required leakage inductance is obtained by the pitch. However, since the leakage inductance is adjusted by adjusting the partition 111 or the thickness of the retaining wall, the efficiency of the electrical characteristics of the transformer 1 is difficult because control is not easily obtained in mass production. Less stable.

Referring to Figures 3 and 4, a second prior art transformer 2 includes a bobbin 21, a core set 22, a primary side excitation coil 23, and a secondary side induction coil 24.

The bobbin 21 has a hollow portion 211, a first winding portion 212 for winding the primary side excitation coil 23, and a second winding portion 213 for winding the secondary side induction coil 24. The notches 214 and the two of the first and second winding portions 212 and 213 communicating with the hollow portion 211 are respectively located at the notch 215 on both end sides of the hollow portion 211, and a plurality of lead terminals spaced apart on both sides 216.

The core group 22 has a first core 221 penetrating into the hollow portion 211 of the bobbin 21, and a second core 222 surrounding the outside of the bobbin 21. The second core 222 has two a first convex portion 2221 extending toward the winding frame 21 and spanning the vacant grooves 215, and a first protruding portion 2221 extending from the middle portion toward the winding frame 21 and penetrating the notch 214 and abutting the first portion a second convex portion 2222 on one side of the core 221 .

Such a transformer uses a magnetic circuit formed by the core group 22 to separate the primary side excitation coil 23 and the secondary side induction coil 24 to increase the magnetic flux path of the leakage magnetic flux A, and utilizes the second convex portion of the second core 222. The magnetic permeability of 2222 increases the leakage inductance, but it also reduces the coupling effect, because the magnetic flux is used to increase the leakage flux, and its magnetic permeability is about 2000~5000, which is a very high multiple. In actual application, the accuracy is not easy to control, resulting in poor efficiency.

It is known that a general transformer includes a coil wound on a bobbin and a core group surrounding the bobbin, and the winding of the coil requires at least two windings, each of which is wound The direction is at least perpendicular to one core portion, so that the magnetic lines generated by the induction coil of the core portion, that is, the primary side excitation winding and the secondary side induction winding winding manner correspond to each other to facilitate the coupling effect by the core group (see FIG. 4, that is, 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 coils correspond to each other. The meaning is to improve the coupling effect. However, after the transformer is produced, the leakage inductance will be generated in actual use, resulting in loss. Therefore, in the case where the prior art cannot achieve the leakage-free inductance, how to use the leakage inductance loss As a power conversion application, the resonant principle effectively controls the leakage inductance problem, which is the goal of the common efforts of various industries.

Accordingly, it is an object of the present invention to provide an additional auxiliary coil that is wound substantially perpendicular to the primary side excitation coil or the secondary side induction coil, substantially parallel to the coupled magnetic beam direction to improve leakage magnetics. Through the transformer.

Thus, the transformer of the present invention and the circuit arrangement for controlling the transformer are provided for connection to a load.

The transformer and the circuit device comprise a bobbin, a core set, a coil set, and a control circuit.

The bobbin has a central hole extending along a length direction, a first winding portion on one side, a second winding portion on the other side, and at least one of the first and second winding portions. The third winding portion is interposed, and a plurality of lead terminals spaced apart at the side.

The core group has a first core penetrating the central hole of the bobbin and a second core, the first and second cores forming at least one closed magnetic path.

The coil assembly has a primary side excitation coil wound on the first winding portion of the bobbin, a secondary side induction coil wound on the second winding portion of the bobbin, and a winding An auxiliary coil on the third winding portion of the bobbin, the secondary side induction coil being connected to the load.

The control circuit has a control unit and a driving unit connected to the primary side excitation coil, and a leakage inductance adjusting unit connected to the auxiliary coil on the third winding portion.

The auxiliary coil is disposed at a coupling position of the primary side excitation coil and the secondary side induction coil so as to be substantially parallel to the direction of the coupled magnetic flux and does not penetrate into the core group to achieve the purpose of adjusting the leakage magnetic flux. In addition, the magnetic flux leakage adjusting unit connected to the auxiliary coil is used to adjust the auxiliary coil to obtain the required amount of leakage inductance, so that the transformer can obtain the best power conversion effect to meet the requirements of various specifications of the transformer.

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the Detailed Description of the <RTIgt;

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 5 and 6, a first preferred embodiment of the transformer 100 of the present invention and the circuit arrangement for controlling the transformer 100 includes a bobbin 3, a core set 4, and a coil assembly 5. The transformer of this type is provided on a printed circuit disposed on a circuit board, not shown.

The bobbin 3 has a bobbin body 30 and two legs 31 respectively formed at the ends of the bobbin body 30 and having a larger diameter than the bobbin body 30. a central hole 32 of the bobbin body 30, a first winding portion 33 on one side of the bobbin body 30, and a second winding portion 34 on the other side of the bobbin body 30. The third winding portion 35 between the first and second winding portions 33 and 34 and the plurality of lead terminals 36 formed on the both end sides of the legs 31 are spaced apart from the top surface of the legs 31 And extending and communicating with the notch 37 on the both end sides of the central hole 32, and a plurality of protruding portions 302 extending from the outer peripheral surface 301 of the bobbin body 30 to the outer circumferential surface of the bobbin body 30, and a plurality of portions The groove portion 303 between the protruding portions 302, and the discontinuity is a notch 304 communicating with the two groove portions 303. In the present embodiment, the third winding portion 35 is formed on one side of the two convex portions 302.

The core group 4 has a first core 41 disposed in the central hole 32 of the bobbin 3, and a second core 42 having two protrusions 421 extending outward from the both end sides. . The second core 42 is disposed on the side of the bobbin 3 and the protrusions 421 are disposed on the notches 37 such that the protrusions 421 are adjacent to the first core 41.

Referring to Figures 5, 6, and 7, the coil assembly 5 has a primary side excitation coil 51, a secondary side induction coil 52 coupled to a load 6, and an auxiliary coil 53. The primary side excitation coil 51 is wound around the first winding portion 33 of the bobbin 3, and the auxiliary coil 53 is wound around the third winding portion 35 of the bobbin 3, the secondary side induction coil 52 is wound on the second winding portion 34 of the bobbin 3, the auxiliary coil 53 is connected to the secondary side induction coil 52, and the winding manner of the auxiliary coil 53 and the secondary side induction coil 52 are substantially Corresponding to the vertical direction, referring to FIG. 7, the auxiliary coil 53 is disposed at a coupling position between the primary side excitation coil 51 and the secondary side induction coil 52 so as to be substantially parallel to the direction of the coupled magnetic flux M, and is not penetrated. In the core group 4, located between the first and second cores 41, 42 (see FIG. 6), when used, when the power source (Vi) is powered and input to one end 511 of the primary side excitation coil 51 of the transformer 100, One of the primary side excitation coils 51 is grounded at the other end 512, thereby generating an excitation effect, and a magnetic flux change, through which the core group 4 forms a closed magnetic circuit, and the secondary side induction coil 52 senses a change in magnetic flux, thereby generating Coupling the magnetic flux, thereby generating an induced potential, and outputting to the load 6, forming a negative a loop, when the secondary side load i2 current flows, the primary side increases the exciting current i1 to maintain the magnetic field effect necessary for its electromagnetic conversion, but based on the coupling effect of the transformer 100, the winding impedance, the distributed capacitance and the load characteristic are also As the load 6 changes, an electrical image occurs, which in turn affects the distortion of the resonant waveform. Therefore, when the auxiliary coil 53 is connected to the secondary side induction coil 52, the load current i2 also flows through the auxiliary coil 53 at the same time, thereby generating a magnetic field effect. The magnetic field line A direction is substantially perpendicular to the direction of the coupled magnetic flux M, and the magnetic flux mutual exclusion effect is generated by adjusting the number of coil turns and adjusting the winding direction, thereby obtaining the leakage inductance characteristic matched with the load 6.

Referring to FIG. 8, in use, a control circuit 7 is applied to the transformer 100. The control circuit 7 has a control unit 71 and a driving unit 72 connected to the primary side excitation coil 51, and the auxiliary coil. A leakage inductance adjusting unit 73 connected to the 53 phase, an input current detecting unit 74 connected between the driving unit 72 and the leakage inductance adjusting unit 73, and a connection between the load 6 and the leakage inductance adjusting unit 73 The current waveform detecting unit 75 and a voltage waveform detecting unit 76 connected between the load 6 and the leakage inductance adjusting unit 73.

When the external power source Vi is powered, power is supplied to the primary side excitation coil 51 of the voltage device 100 via the driving unit 72. At this time, the transformer 100 is proportional to the number of turns of the primary side excitation coil 51 and the secondary side induction coil 52. Converting to a voltage ratio, and outputting a voltage to the load 6 by the secondary side induction coil 52, and feeding back to the control unit 71 via the load 6 to compare the preset electrical characteristics, and outputting an appropriate size signal to the driving unit. 72. The waveform of the driving unit 72 is simultaneously supplied to the primary side excitation coil 51 and the waveform of the leakage current adjustment processed by the input current detecting unit 74 is input to the leakage inductance adjusting unit 73, and is fed back to the current by the load 6. The waveform detecting unit 75 or the waveform fed back to the voltage waveform detecting unit 76 is sent to the leakage inductance adjusting unit 73, and after the operation comparison of the leakage inductance adjusting unit 73, an appropriate amount of current and phase are input to the auxiliary coil 53, and the waveform is used. The magnetic flux change of the auxiliary coil 53 and the leakage magnetic flux mutual repulsion effect or the attracting effect generated by the coupling effect process, thereby achieving the size of the adjustable leakage magnetic flux, and the load of the transformer 100 Best characteristics of power conversion requirements. In addition, the feedback signal fed back to the leakage inductance adjusting unit 73 continuously detects the impedance variation characteristic of the load 6 end. Therefore, the leakage inductance adjusting unit 73 can appropriately adjust the in-phase or inversion of the auxiliary coil 53. The magnitude of the current allows the efficiency of the transformer 100 to match the characteristics of the load 6 while maintaining the optimum electrical characteristics of the output.

Through the above description, although the leakage flux can be increased compared with the second prior art transformer, but the loss cannot be effectively controlled, the winding method of the auxiliary coil 53 of the present invention is substantially perpendicular to the primary side excitation coil. 51 or the secondary side induction coil 52 is substantially parallel to the direction of the coupled magnetic flux, and is not penetrated into the core group 4 and located between the first and second cores 41, 42 by the auxiliary coil 53 The leakage flux is adjusted, and the leakage inductance adjusting unit 73 of the control circuit 7 generates a magnetic flux mutual exclusion or attraction, controls the magnitude and phase of the appropriate leakage magnetic flux, and ensures the magnetic flux leakage amount. Therefore, the transformer can be controlled. The power conversion characteristics of 100 are in an optimal state and the loss is minimized.

Referring to Figures 9 and 10, a second preferred embodiment of the transformer 100 of the present invention includes a bobbin 3, a core set 4, and a coil assembly 5. The structure of the bobbin 3 and the core group 4 are the same as those of the first preferred embodiment of FIG. 5 and will not be described again. The coil group 5 has a primary side excitation coil 51, a secondary side induction coil 52, and two auxiliary coils 53. In the second embodiment, only one auxiliary winding 53 is added by different winding methods. A total of two auxiliary coils 53 are located between the secondary side induction coil 52 and the core portions 421, and are respectively wound around the winding frame. The other combined structures of the projections 302 of 3 are the same as those of FIG. In the second preferred embodiment, only the auxiliary coil 53 of FIG. 5 is not limited to the description of the present invention. According to the requirements of the transformer 100 with different output voltages and different power conversion characteristics, the majority of the auxiliary coils 53 can also be used as expected. the goal of. The manner in which the control circuit 7 of FIG. 8 is adjusted for leakage inductance is the same as the above, and will not be described again.

Referring to Figures 11 and 12, a third preferred embodiment of the transformer 100 of the present invention and the circuit arrangement for controlling the transformer 100 includes a bobbin 3, a core set 4, and a coil assembly 5. The structure of the bobbin 3 and the winding group 5 is the same as that of the first embodiment of FIGS. 5 and 6, and details are not described herein again.

The core group 4 has a first core 41 disposed in the central hole 32 of the bobbin 3, and a second core 42 having two protrusions 421 extending outward from the both end sides. And a second bump 422 between the bumps 421. The second core 42 is disposed on the side of the bobbin 3 and the protrusions 421 are disposed on the notches 37 such that the protrusions 421 are adjacent to the first core 41. The second bump 422 extends into a middle portion 530 of the auxiliary coil 53 without contacting the auxiliary coil 53.

When the primary side excitation coil 51 passes the excitation current i1, the secondary side induction coil 52 provides a load according to the required number of turns, thereby generating a load current i2, and the auxiliary coil 53 and the secondary side are induced. The coils 52 are connected, so that the auxiliary coil 53 also has an i2 current, which in turn generates a magnetic field effect, and the direction of the magnetic field generated by the auxiliary coils 53 is the same as that of the primary side exciting coil 51, as shown in Fig. 12, assuming i1 When the forward current is input, the S pole is directed toward the secondary side induction coil 52, and when the auxiliary coil 53 is circulated with the i2 current, the coupling of the S pole toward the primary side excitation coil 51 and the secondary side induction coil 52 is generated. Position, and conversely, as shown in FIG. 13, assuming that the i1 reverse current input direction generates an N pole toward the secondary side induction coil 52, and the auxiliary coil 53 circulates the i2 current, an N pole is generated toward the primary side excitation coil 51. And the coupling position of the secondary side induction coil 52 is generated by the winding direction and the number of turns of the auxiliary coil 53 to generate a mutually exclusive effect of the direction of the coupled magnetic flux, and in the case where the original magnetic permeability is high, the appropriate The high permeability characteristics of the second protrusion 2222 of the deletion of the portion 222 of the second core 53 generates the appropriate number of turns of the coil of the co-exclusive effect to improve the conventional transformer 3 and 4 of the FIG.

Referring to Figures 14 and 15, a fourth preferred embodiment of the transformer 100 of the present invention and the circuit arrangement for controlling the transformer 100 includes a bobbin 3, a core set 4, and a coil assembly 5. The structure of the bobbin 3 and the winding group 5 is the same as that of the first embodiment of FIGS. 5 and 6, and details are not described herein again.

The core group 4 has a first core 41 disposed in a central hole 32 (see FIG. 5) of the bobbin 3, and a second core 42 having two sides from the opposite ends. An extended protrusion 421, a second protrusion 422 located between the protrusions 421, and two oppositely extending from the outer circumference of the bobbin body 30. The second core 42 is disposed on the side of the bobbin 3 and the protrusions 421 are disposed on the notches 37 such that the protrusions 421 are adjacent to the first core 41. The second protrusion 422 is fixed to the outer circumference of the bobbin body 30 by the latches 423, and extends into the middle portion 530 of the auxiliary coil 53 without contacting the auxiliary coil 53.

Referring to Fig. 15, in the fourth embodiment, the auxiliary coil 53 is used to increase and control the magnitude of the magnetic flux of the leak A. If the high magnetic flux is required, the auxiliary coil 53 will not be able to reach the required value. The second bump 422 (corresponding to a magnetic conductive block) extends into the middle of the auxiliary coil 53 to improve the magnetic field effect (M), and the number of turns is reduced, and at the same time, in order to prevent the magnetic permeability from being too high, 422 to the second core 42 and the second bump 422 to the two air gaps d1 and d2 of the first core 41 can also indirectly improve the effect of excessive magnetic flux variation (M).

Referring to Figures 16, 17, and 18, in a fifth preferred embodiment of the transformer 100 of the present invention, the transformer 100 of the type is an uninsulated film or a continuous extending circumferentially extending from the outer circumferential surface of one of the bobbin bodies. The part is a single transformer of the interlayer structure of the partial pressure principle. The transformer 100 includes a bobbin 3, a core group 4, and a coil assembly 5. The structure of the bobbin 3 is similar to that of the transformer of FIG. 5. The difference is that the length of the bobbin 3 is shortened, the width is increased, and only three spaced apart protruding portions 302 are provided. The core group 4 is composed of a first core 41 and a second core 42 of an inverted E type. The coil group 5 has a primary side excitation coil 51, a secondary side induction coil 52, and two auxiliary coils 53. The auxiliary coils 53 of the fifth embodiment are formed to correspond to each other on one side of one of the protruding portions 302, and the winding manner of the auxiliary coils 53 is substantially perpendicular to the primary side exciting coil 51 and The secondary side induction coil 52 is substantially parallel to the direction of the coupled magnetic flux M, and is not inserted into the core group 4, and is disposed between the two cores 41, 42 of the core group 4. In the fifth preferred embodiment, only the auxiliary coil 53 of FIG. 9 is divided into different protruding portions 302 for the purpose of illustrating the present invention, and the transformer 100 is required according to different output voltages and different power conversion characteristics. The auxiliary coils 53 are wound around opposite sides of the same protruding portion 302 to enhance the efficiency of adjusting the leakage magnetic flux A, and the adjustment of the distribution position can also achieve the intended purpose. The manner in which the control circuit 7 of FIG. 8 is adjusted for leakage inductance is the same as the above, and will not be described again.

Referring to Figures 19 and 20, a sixth preferred embodiment of the transformer 100 of the present invention and the circuit device for controlling the transformer 100 includes a first bobbin 8, a second bobbin 9, and a core group 4. A coil assembly 5, and a magnetically conductive element 10.

The first bobbin 8 has a first central hole 81 extending along a length direction X, two stop portions 82 respectively located at two sides, and a first bundle formed between the stops 82. The winding portion 83, four extending portions 84 extending outward from the stopper portions 82, and a plurality of lead terminals 85 spaced apart from one side of the one of the stopper portions 82.

The second bobbin 9 has a first central hole 91 extending along a length direction X, two stop portions 92 respectively located on the two sides, and a second bundle formed between the stops 92. a winding portion 93, four extending portions 94 extending outward from the stopping portions 92, and a plurality of lead terminals 95 spaced apart from one side of one of the stopping portions 92, the second winding frame 9 The extension portion 94 and the extension portion 84 of the first bobbin 8 constitute two third winding portions 96.

The core group 4 has a first core 41 and a second core 42. The first and second cores 41 and 42 respectively extend outward from both end sides and are disposed on the first and second bobbins 8 and 9. The first and second central holes 81 and 91 have projections 411 and 421.

The coil group 5 has a primary side excitation coil 51, a secondary side induction coil 52, and two auxiliary coils 53. The primary side excitation coil 51 is wound around the first winding portion 83 of the first bobbin 8, and the auxiliary coils 53 are wound around the third winding portions 96. The secondary side induction coil 52 Is wound on the second winding portion 93 of the second bobbin 9, the auxiliary coil 53 is connected to the primary side induction coil 51, and the winding manner of the auxiliary coils 53 is substantially parallel to the direction of the coupled magnetic flux. And not inserted into the core group 4 and located between the first winding portion 8 and the second winding portion 9 and the first and second cores 41, 42. And the junction of the first core 41 and the second core 42 of the core group 4 is located between the first winding portion 83 and the second winding portion 93 to increase the leakage magnetic flux.

The magnetic conductive element 10 is disposed on one side of the primary side excitation coil 51, the secondary side induction coil 52, and the auxiliary coils 53, and has two phases extending outward from the body side of the magnetic conductive element 10 and The suspension extends into the extension 101 of the intermediate portion 530 of the auxiliary coil 53, and the magnetic conductive element 10 serves to block external electromagnetic interference.

In the sixth preferred embodiment, only the winding frame of the coaxial winding coil of FIGS. 5, 9, and 11 is not limited to the description of the present invention, and the primary side exciting coil 51 can be replaced with the shape of the core. The secondary side induction coil 52 and the auxiliary coils 53 achieve the desired magnetic permeability, coupling and magnetic beam alignment effect, and two or more parallel winding frames can also be used, and the intended purpose can also be achieved. The manner in which the control circuit 7 of FIG. 8 is adjusted for leakage inductance is the same as the above, and will not be described again.

Referring to FIG. 21, a seventh preferred embodiment of the transformer 100 of the present invention and the circuit device for controlling the transformer 100 includes a first bobbin 8, two second bobbins 9, a core group 4, and a a coil assembly 5, and a magnetically conductive element 10.

The first bobbin 8 is the same as that of FIG. 19 and has the first central hole 81, the stop portions 82, the first winding portion 83, the extended portions 84, and the lead terminals 85.

The second bobbin 9 is the same as that of FIG. 19, and has the first central hole 91, the stop portion 92, the second winding portion 93, the extended portions 94, and the lead terminals 95. The extension portion 94 of the second bobbin 9 and the extension portion 84 of the first bobbin 8 together form four third winding portions 96.

The core group 4 has a first core 41 and a second core 42. The first and second cores 41 and 42 respectively have three central slots 81 spaced apart from each other and are placed in the first bobbin 8 and the like. The bumps 411 and 421 of the second central hole 91 of the second bobbin 9 (the bumps 421 are not seen in FIG. 21, and the bumps 421 correspond to the bumps 411, see FIG. 19).

The coil group 5 has a primary side excitation coil 51, two secondary side induction coils 52, and four auxiliary coils 53. The primary side excitation coil 51 is wound around the first winding portion 83 of the first bobbin 8, and the auxiliary coils 53 are wound around the third winding portions 96, and the secondary side induction coils 52 is wound around the second winding portion 93 of the second bobbin 9, the auxiliary coil 53 is connected to the primary side excitation coil 51, and the winding manner of the auxiliary coil 53 is substantially parallel to the coupling The magnetic flux direction is not penetrated into the core group 4 and is located between the first winding portion 8 and the second winding portion 9 and the first and second cores 41 and 42. And the junction of the first core 41 and the second core 42 of the core group 4 is located between the first winding portion 83 and the second winding portions 93 to increase the leakage magnetic flux.

The magnetic conductive element 10 is disposed on one side of the primary side excitation coil 51, the secondary side induction coil 52, and the auxiliary coils 53, and has four spaced apart portions extending outward from the body side of the magnetic conductive element 10. And extending into the extension portion 101 of the intermediate portion 530 of the auxiliary coil 53, the magnetic conductive element 10 serves to block external electromagnetic interference.

In the seventh preferred embodiment of Fig. 21, only the split winding coils of the present invention are not limited to the single first and second bobbins 8, 9 of Figs. 19 and 20, and more than two may be added. The second bobbin 9 has the same function and will not be described again.

Referring to FIG. 22, an eighth preferred embodiment of the transformer 100 of the present invention and the circuit device for controlling the transformer 100 includes a first bobbin 8, a second bobbin 9, a core group 4, and a coil. Group 5, and a magnetically conductive element 10.

The first bobbin 8 has a first central hole 81 extending along a length direction X, two stop portions 82 respectively located at two sides, and a first bundle formed between the stops 82. The winding portion 83 and the fourth extending portion 84 extending outward from the stopping portions 82 respectively, a plurality of lead terminals 85 spaced apart from each other on one side of the one of the stopping portions 82, and a discontinuous circumferential circumference from the outer peripheral surface An extended protruding portion 86, and two groove portions 87 formed between the protruding portions 86, and the discontinuous portion is a notch 88 communicating with the two groove portions 87, the primary side exciting coil 51 is It is wound around one of the groove portions 87 and is spanned by the notch 88 to the other groove portion 87.

The second bobbin 9 has a first central hole 91 extending along a length direction X, two stop portions 92 respectively located at the two sides, and a first bundle formed between the stops 92. The winding portion 93 and the fourth extending portion 94 extending outward from the stopping portions 92 respectively, a plurality of lead terminals 95 spaced apart from one side of one of the stopping portions 92, and a discontinuous circumferential circumference from the outer peripheral surface An extended protruding portion 97, and two groove portions 98 formed between the protruding portions 97, and the discontinuous portion is a notch 99 communicating with the two groove portions 98, the secondary side induction coil 52 It is wound around one of the groove portions 97 and is spanned by the notch 99 to the other groove portion 98. The extended portion 94 of the second bobbin 9 and the extended portion 84 of the first bobbin 8 form two third winding portions 96 for winding the auxiliary coils 53.

The core group 4 is the same as that of FIG. 19, and has a first core 41 and a second core 42. The first and second cores 41 and 42 respectively extend outward from both end sides and are inserted through the first and second windings. The bumps 411 and 421 of the first and second central holes 81 and 91 of the wire frames 8 and 9 (the convex blocks 421 are not seen in FIG. 22, and the convex blocks 421 correspond to the convex blocks 411, see FIG. 19). .

Similarly to FIG. 19, the magnetic conductive element 10 is disposed on one side of the primary side excitation coil 51, the secondary side induction coil 52, and the auxiliary coils 53, and has two sides from the main body of the magnetic conductive element 10. Extending outwardly and suspended into the extension 101 of the intermediate portion 530 of the auxiliary coils 53, the magnetically permeable element 10 serves to block external electromagnetic interference.

In the eighth preferred embodiment of FIG. 22, only the manner of winding the coil of the present invention is illustrated, and the protruding portions 86, 97 may be added to the first and second bobbins 8, 9 to The partial pressure effect is achieved, and the other functions are the same as those of the foregoing embodiments, and will not be described again.

In summary, since the second existing transformer can increase the leakage flux, it cannot effectively control the leakage inductance and thus cause the loss; the winding method of the auxiliary coil 53 in the present invention is substantially perpendicular to the primary side excitation coil 51 or The secondary side induction coil 52 is substantially parallel to the direction of the coupled magnetic flux M, and is not penetrated into the core group 4, and is disposed between the two cores 41, 42 of the core group 4 for adjusting the leakage magnetic field. For the purpose of A, the leakage flux adjusting unit 73 connected to the auxiliary coil 53 can be reused to adjust the amount of leakage inductance, so that the transformer 100 can obtain the best power conversion characteristics to meet various specifications. The needs of the transformer 100.

In addition, in the above first to eighth preferred embodiments, the winding manner of the auxiliary coils 53 and the winding manner of the primary side excitation coils 51 and the secondary side induction coils 52 are substantially perpendicular. In order to be substantially parallel to the direction of the coupled magnetic flux M, of course, the preferred embodiment is the winding manner of the auxiliary coils 53 and the winding manner of the primary side excitation coil 51 and the secondary side induction coil 52. Forms a vertical relationship and is parallel to the direction of the coupled magnetic flux M.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the present invention and the description of the invention are as follows. All remain within the scope of the invention patent.

100. . . transformer

52. . . Secondary side induction coil

3. . . Winding frame

53. . . Auxiliary coil

30. . . Winding frame body

530. . . Middle

301. . . Peripheral surface

6. . . load

302. . . Protruding part

7. . . Control circuit

303. . . Groove

71. . . control unit

304. . . gap

72. . . Drive unit

31. . . Foot

73. . . Leakage adjustment unit

32. . . Central hole

74. . . Input current detection unit

33. . . First winding

75. . . Current waveform detection unit

34. . . Second winding

76. . . Voltage waveform detection unit

35. . . Third winding

8. . . First bobbin

36. . . Lead terminal

81. . . Central hole

37. . . Missing slot

82. . . Stop

4. . . Iron core group

83. . . First winding

41. . . First core

84. . . Extension

411. . . Bump

85. . . Lead terminal

42. . . Second core

86. . . Protruding part

421. . . Bump

87. . . Groove

422. . . Second bump

88. . . gap

423. . . Latch

9. . . Second bobbin

5. . . Coil set

91. . . Central hole

51. . . Primary side excitation coil

92. . . Stop

93. . . Second winding

99. . . gap

94. . . Extension

10. . . Magnetic component

95. . . Lead terminal

101. . . Extension

96. . . Third winding

A. . . Leakage flux

97. . . Protruding part

M. . . Coupled magnetic flux

98. . . Groove

1 is a perspective exploded view showing a first prior art transformer; FIG. 2 is a partial cross-sectional view of a first prior art transformer; FIG. 3 is an exploded perspective view showing a second conventional transformer; FIG. FIG. 5 is an exploded perspective view showing a first preferred embodiment of the transformer of the present invention; FIG. 6 is a combined plan view of FIG. 5; FIG. 7 is a transformer equivalent diagram of the first embodiment; 8 is a block flow diagram illustrating the transformer and a control circuit; FIG. 9 is a view similar to FIG. 6 illustrating a second preferred embodiment of the transformer of the present invention; FIG. 10 is equivalent to a transformer of the second embodiment Figure 11 is an exploded perspective view showing a third preferred embodiment of the transformer of the present invention; Figure 12 is a combined top view of Figure 11 illustrating the direction of the magnetic flux inputting the forward current; Figure 13 is similar to Figure 12 FIG. 14 is a view similar to FIG. 12, illustrating a fourth preferred embodiment of the transformer of the present invention; FIG. 15 is an enlarged view of the fourth embodiment; 16 is an exploded perspective view illustrating the present invention Fig. 17 is a top view of Fig. 16; Fig. 18 is a transformer equivalent diagram of the fifth embodiment; Fig. 19 is an exploded perspective view showing the sixth comparison of the transformer of the present invention 20 is a combination view of the sixth preferred embodiment; FIG. 21 is an exploded perspective view showing a seventh preferred embodiment of the transformer of the present invention; and FIG. 22 is an exploded perspective view of the present invention An eighth preferred embodiment of the invention is invented.

100. . . transformer

3. . . Winding frame

30. . . Winding frame body

301. . . Peripheral surface

302. . . Protruding part

303. . . Groove

304. . . gap

31. . . Foot

32. . . Central hole

33. . . First winding

34. . . Second winding

35. . . Third winding

36. . . Lead terminal

37. . . Missing slot

4. . . Iron core group

41. . . First core

42. . . Second core

421. . . Bump

5. . . Coil set

51. . . Primary side excitation coil

52. . . Secondary side induction coil

53. . . Auxiliary coil

Claims (44)

A transformer comprising: a bobbin having a central hole extending along a length direction, a first winding portion on one side, and a second winding portion on the other side, at least one being located at the first a third winding portion between the two winding portions, and a plurality of lead terminals spaced apart from each other at the side; and a core group having a first core penetrating the central hole of the winding frame, and a a second core, the first and second cores form at least one closed magnetic path; and a coil set having a primary side excitation coil wound around the first winding portion of the bobbin, and a winding around the winding a secondary side induction coil on the second winding portion of the frame, and an auxiliary coil wound on the third winding portion of the winding frame, the auxiliary winding is wound substantially in a direction parallel to the coupled magnetic flux direction, and The core group does not penetrate into the auxiliary coil, whereby the leakage magnetic flux can be adjusted. The transformer of claim 1, wherein the auxiliary coil is located between the first and second cores. The transformer of claim 1, wherein the primary side excitation coil is coupled to the auxiliary coil. The transformer of claim 1, wherein the secondary side induction coil is connected to the auxiliary coil. The transformer of claim 1, wherein the winding of the auxiliary coil is substantially perpendicular to a winding manner of the primary side exciting coil. The transformer of claim 1, wherein the winding of the auxiliary coil is substantially perpendicular to the winding manner of the secondary side induction coil. The transformer according to claim 1, wherein the auxiliary coil on the third winding portion of the bobbin is provided with two or more, which are connected in series or in parallel. The transformer according to claim 1, wherein the bobbin further has a plurality of protruding portions extending from the outer circumferential surface to the outer discontinuous circumferential circumference, and a plurality of the protruding portions are formed at the protruding portions. a groove portion between the discontinuities at a gap between the two groove portions, wherein the primary side excitation coil and the secondary side induction coil are wound one by one at the groove portions, and by the The notch spans to the next groove portion, the auxiliary coil is wound on one side of the at least one protruding portion, and the other of the primary side excitation coil and the secondary side induction coil is wound around one of the winding frames On the groove. The transformer according to claim 1, wherein the second core has two protrusions extending outward from the two end sides, and the bobbin further has two notches respectively located at two end sides of the central hole. The second core is mounted on one side of the bobbin and the bumps are disposed on the slots so that the bumps abut the first core. The transformer of claim 1, wherein the second core has two protrusions extending outward from the two end sides, and a second protrusion located between the protrusions, the second protrusion The block penetrates into a middle portion of the auxiliary coil. According to the transformer of claim 10, the second bump is formed by extending one of the one or two cores. According to the transformer of claim 10, the second bump is a magnetic conductive component and is spaced apart from the first core and the second core by a gap. A transformer comprising: a first bobbin having a first central hole extending along a length direction, two stop portions respectively located at two sides, and a bundle formed between the stops a winding portion, two extending portions extending outward from the stopping portions, and a plurality of lead terminals spaced apart from one side of the one of the stopping portions; a second winding frame having a length along a length a second central hole extending in parallel with the first central hole, two stop portions respectively located on the two side edges, and a second winding portion formed between the stop portions and the second winding portion respectively a protruding portion extending outwardly from the stopping portion, and a plurality of lead terminals spaced apart from each other at a side of the one of the stopping portions, wherein the extending portion of the first winding frame and the extending portion of the second winding frame form a a third winding portion; a core group having a first core and a second core penetrating the first and second central holes of the first and second bobbins, the first and second cores forming at least one a closed magnetic path; and a coil set having a winding around the first bobbin The primary excitation coils on a winding portion wound around a second bobbin on the second portion of the secondary side winding induction coil and a winding of the first and second winding An auxiliary coil on the third winding portion of the wire frame, whereby the leakage magnetic flux can be adjusted. The transformer of claim 13, wherein the auxiliary coil is wound in a manner substantially parallel to the direction of the coupled magnetic flux, and the core group does not penetrate into the auxiliary coil. The transformer of claim 13, wherein the auxiliary coil is located between the first winding portion and the second winding portion. The transformer of claim 13, wherein the auxiliary coil is located between the first winding portion and the second winding portion and between the first core. The transformer of claim 13, wherein the auxiliary coil is located between the first winding portion and the second winding portion and the second core. The transformer according to claim 13, wherein the first bobbin further has at least one protruding portion extending from an outer peripheral surface to the outer discontinuous circumferential circumference, and a plurality of the plurality of protruding portions are formed between the protruding portions. a groove portion, wherein the discontinuity is a gap communicating with the two groove portions, and one of the primary side excitation coil and the secondary side induction coil is wound one by one on one of the groove portions, and by the The gap spans over the other groove portion. The transformer of claim 13, wherein the second bobbin further has at least one protruding portion extending from an outer circumferential surface to the outer discontinuous circumferential circumference, and a plurality of the plurality of protruding portions are formed between the protruding portions. Groove And the discontinuity is a gap connecting the two groove portions, and one of the primary side induction coil and the secondary side induction coil is wound around the one of the groove portions, and the gap is crossed by the gap On the other part of the groove. The transformer according to claim 13, wherein the second bobbin is provided with two or more. The transformer of claim 13, wherein at least one joint of the first core of the core group and the second core is located between the first winding portion and the second winding portion to increase It leaks magnetic flux. The transformer according to claim 13 further comprising a magnetic conductive element disposed on one side of the primary side excitation coil, the secondary side induction coil and the auxiliary coil. The transformer of claim 13 wherein the magnetically permeable element has at least one bump extending into an intermediate portion of the auxiliary coil to improve adjustment efficiency. The transformer of claim 13, wherein the primary side excitation coil is coupled to the auxiliary coil. The transformer of claim 13, wherein the secondary side induction coil is coupled to the auxiliary coil. The transformer of claim 13, wherein the winding of the auxiliary coil is substantially perpendicular to the winding manner of the primary side exciting coil. The transformer of claim 13, wherein the winding of the auxiliary coil is substantially perpendicular to the winding of the secondary side induction coil Winding way. The transformer according to claim 13, wherein the second bobbin is provided with two or more, and the protruding portion of the first bobbin and the protruding portion of the second bobbin constitute two In the above third winding portion, two or more auxiliary coils of the coil group are provided, and the auxiliary coils are wound around the third winding portions, and are connected in series or in parallel. A transformer and a circuit device for controlling the transformer are provided for connection to a load, the transformer and the circuit device comprising: a bobbin having a central hole extending along a length direction and a first winding on one side a wire portion, a second winding portion on the other side, at least one third winding portion between the first and second winding portions, and a plurality of lead terminals spaced apart at a side; and a core a group having a first core placed in a central hole of the bobbin and a second core, the first and second cores forming at least one closed magnetic path; and a coil set having a winding around the winding a primary side excitation coil on the first winding portion of the wire frame, a secondary side induction coil wound on the second winding portion of the winding frame, and a third winding portion wound around the winding frame An auxiliary coil, the secondary side induction coil is connected to the load, the auxiliary coil is wound in a manner substantially parallel to the direction of the coupled magnetic flux, and the core group does not penetrate into the auxiliary coil; and a control circuit, With the primary side excitation coil And a control unit connected to a driving unit, a leakage inductance, and adjusting means connected to the secondary coil of the third winding portion. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the control circuit further has a current waveform detecting unit connected between the load and the leakage inductance adjusting unit. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the control circuit further has a voltage waveform detecting unit connected between the load and the leakage inductance adjusting unit. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the primary side excitation coil is connected to the auxiliary coil. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the secondary side induction coil is connected to the auxiliary coil. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the winding of the auxiliary coil is substantially perpendicular to a winding manner of the primary side exciting coil. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the winding of the auxiliary coil is substantially perpendicular to a winding manner of the secondary side induction coil. The transformer according to claim 29, and the circuit device for controlling the transformer, wherein the auxiliary coil on the third winding portion of the bobbin is provided with two or more, connected in series or in parallel . The transformer of claim 29, wherein the auxiliary coil is located between the first winding portion and the second winding portion. The transformer of claim 29, wherein the auxiliary coil is located between the first winding portion and the second winding portion and between the first core. A transformer according to claim 29, and a circuit device for controlling a transformer, wherein the auxiliary coil is located at a position where the first winding portion and the second winding portion are coupled to each other and the second core between. The transformer according to claim 29, and the circuit device for controlling the transformer, wherein the bobbin further has a plurality of protruding portions extending from the outer circumferential surface to the outer discontinuous circumferential circumference, and a plurality of a groove portion formed between the protruding portions, wherein the discontinuity is a gap communicating with the two groove portions, and one of the primary side excitation coil and the secondary side induction coil is wound one by one Waiting for the groove portion, and by the gap spanning to the next groove portion, the auxiliary coil is wound on one side of the at least one protruding portion, and the other side of the primary side excitation coil and the secondary side induction coil are Wound on one of the groove portions of the bobbin. A transformer according to claim 29, and a circuit device for controlling the transformer, wherein the second core has two protrusions extending outward from both end sides, and the bobbin has two more respectively located at the center The second core is disposed on one side of the bobbin and the bumps are disposed on the notches so that the bumps abut the first core. The transformer according to claim 29, further comprising a magnetic conductive component disposed on one side of the primary side excitation coil, the secondary side induction coil, and the auxiliary coil. According to the transformer of claim 42 and the circuit device for controlling the transformer, the magnetic conductive element has at least one bump extending into a middle portion of the auxiliary coil to improve the adjustment performance. According to the transformer of claim 43 and the circuit device for controlling the transformer, the bump is a magnetic conductive component, and is spaced apart from the first and second cores and the magnetic conductive component by a gap.