A winding coupled magnetic assembly and power conversion module

Abstract

A winding coupled magnetic assembly and a power conversion module are disclosed. First, second and third coupling magnetic columns are arranged at intervals and located between first and second common magnetic columns. A first input portion of a first winding is arranged between the first common magnetic column and the first coupling magnetic column. A first intermediate portion is arranged between the first and second coupling magnetic columns, between the second common magnetic column and the second coupling magnetic column, and between the second and third coupling magnetic columns. A first output portion is arranged between the first common magnetic column and the third coupling magnetic column. A second input portion of a second winding is arranged between the second common magnetic column and the first coupling magnetic column. A second intermediate portion is arranged between the first and second coupling magnetic columns, between the first common magnetic column and the second coupling magnetic column, and between the second and third coupling magnetic columns. A second output portion is arranged between the second common magnetic column and the third coupling magnetic column.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a winding-coupled magnetic assembly and a power conversion module, in particular, to a thin winding-coupled magnetic assembly and a power conversion module. BACKGROUND

[0002] The two-phase interleaved parallel buck circuit has the advantages of small output current ripple, small output filter volume and large system output power, and is widely used in power conversion modules. The two-phase interleaved parallel buck circuit further adopts a winding-coupled magnetic assembly, that is, a coupled inductor, which can further reduce the output current ripple amplitude of the power conversion module and improve the dynamic response characteristics of the power conversion module.

[0003] Please refer to Figure 1 , which is a winding-coupled magnetic assembly structure diagram used in an interleaved parallel buck circuit. As shown in the figure, the magnetic assembly 1 includes two columns 11 and two windings 12, wherein the two windings 12 are between the two columns 11 and only have one intersection, so that 50% of the alternating magnetic flux generated by each of the two windings is subtracted in phase and closed through the two columns. When the interleaved parallel buck circuit is applied in an output voltage amplitude higher and frequency lower occasion, it will cause the two windings 12 of the magnetic assembly to bear a higher volt-second product, further causing the two columns 11 of the magnetic assembly to have a higher magnetic core loss problem. In order to reduce the magnetic core loss of the two columns of the magnetic assembly, the cross-sectional area of the column needs to be increased, which will also lead to the thickening of the upper and lower magnetic covers of the magnetic core, thus unable to realize the thin and low conduction thermal resistance design of the power conversion module. SUMMARY

[0004] The purpose of the present disclosure is to provide a winding-coupled thin magnetic assembly and a power conversion module.

[0005] To achieve the above object, one embodiment of the present disclosure provides a magnetic assembly, comprising a first common magnetic column, a second common magnetic column, a first coupling magnetic column, a second coupling magnetic column, a third coupling magnetic column, a first winding and a second winding. The second common magnetic column is oppositely arranged with the first common magnetic column. The first coupling magnetic column, the second coupling magnetic column and the third coupling magnetic column are sequentially and spacedly arranged between the first common magnetic column and the second common magnetic column, and the second coupling magnetic column is between the first coupling magnetic column and the third coupling magnetic column. The first winding comprises a first input portion, a first intermediate portion and a first output portion which are sequentially connected. The first input portion is arranged between the first common magnetic column and the first coupling magnetic column. The first intermediate portion is arranged between the first coupling magnetic column and the second coupling magnetic column, between the second common magnetic column and the second coupling magnetic column, and between the second coupling magnetic column and the third coupling magnetic column. The first output portion is arranged between the first common magnetic column and the third coupling magnetic column. The second winding comprises a second input portion, a second intermediate portion and a second output portion which are sequentially connected. The second input portion is arranged between the second common magnetic column and the first coupling magnetic column. The second intermediate portion is arranged between the first coupling magnetic column and the second coupling magnetic column, between the first common magnetic column and the second coupling magnetic column, and between the second coupling magnetic column and the third coupling magnetic column. The second output portion is arranged between the second common magnetic column and the third coupling magnetic column.

[0006] To achieve the above object, another embodiment of the present disclosure provides a magnetic assembly, comprising a first magnetic cover, a second magnetic cover, a first common magnetic column, a second common magnetic column, N coupling magnetic columns, a first winding and a second winding. The first magnetic cover has a surface. The second magnetic cover has a surface. The first common magnetic column is located between the first magnetic cover and the second magnetic cover. The second common magnetic column is oppositely arranged with the first common magnetic column and located between the first magnetic cover and the second magnetic cover. The N coupling magnetic columns are sequentially and spacedly arranged between the first common magnetic column and the second common magnetic column and located between the first magnetic cover and the second magnetic cover, wherein N is an integer greater than or equal to 3. The first winding is threaded between each coupling magnetic column and the adjacent coupling magnetic column, between the even-numbered coupling magnetic column of the N coupling magnetic columns and the second common magnetic column, and between the odd-numbered coupling magnetic column of the N coupling magnetic columns and the first common magnetic column, and the first winding comprises a first input portion, a first intermediate portion and a first output portion connected in sequence, the first input portion is threaded between the first common magnetic column and the first coupling magnetic column of the N coupling magnetic columns, the first intermediate portion is connected between the first input portion and the first output portion, wherein when N is odd, the first output portion is threaded between the N coupling magnetic column of the N coupling magnetic columns and the first common magnetic column, and when N is even, the first output portion is threaded between the N coupling magnetic column of the N coupling magnetic columns and the second common magnetic column. The second winding is threaded between each coupling magnetic column and the adjacent coupling magnetic column, between the odd-numbered coupling magnetic column of the N coupling magnetic columns and the second common magnetic column, and between the even-numbered coupling magnetic column of the N coupling magnetic columns and the first common magnetic column, and the second winding comprises a second input portion, a second intermediate portion and a second output portion connected in sequence, the second input portion is threaded between the second common magnetic column and the first coupling magnetic column of the N coupling magnetic columns, the second intermediate portion is connected between the second input portion and the second output portion, wherein when N is odd, the second output portion is threaded between the N coupling magnetic column of the N coupling magnetic columns and the second common magnetic column, and when N is even, the second output portion is threaded between the N coupling magnetic column of the N coupling magnetic columns and the first common magnetic column.

[0007] To achieve the above object, another embodiment of the present disclosure provides a power conversion module, comprising the above-mentioned magnetic assembly and at least two half-bridge arms. The midpoint of each half-bridge arm is respectively connected to the first input portion of the first winding and the second input portion of the second winding. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 Structure diagram of a magnetic assembly of a conventional power conversion module.

[0009] Figure 2 Structure diagram of a magnetic assembly of the first embodiment of the present disclosure.

[0010] Figure 3 Structure diagram of a magnetic assembly of the second embodiment of the present disclosure. Figure 2Exploded structural diagram of the magnetic assembly shown.

[0011] Figure 4 For the power conversion module Figure 2 Structural diagram of the power conversion module of the magnetic assembly shown.

[0012] Figure 5 For the power conversion module Figure 4 Voltage signal waveform diagram of the switch tube of the half-bridge arm of the power conversion module shown.

[0013] Figure 6 Structural diagram of the magnetic assembly of the second embodiment of the present disclosure.

[0014] Figure 7 For the power conversion module Figure 6 Exploded structural diagram of the magnetic assembly shown.

[0015] Figure 8A Structural diagram of the magnetic assembly of the third embodiment of the present disclosure.

[0016] Figure 8B For the power conversion module Figure 8A Structural diagram of the magnetic assembly from another perspective shown.

[0017] Figure 9 For the power conversion module Figure 8A Exploded structural diagram of the magnetic assembly shown.

[0018] Figure 10 Exploded structural diagram of the magnetic assembly of the fourth embodiment of the present disclosure.

[0019] Figure 11 Structural diagram of the magnetic assembly of the fifth embodiment of the present disclosure.

[0020] Figure 12 For the power conversion module Figure 11 Exploded structural diagram of the magnetic assembly shown.

[0021] Figure 13 Structural diagram of the power conversion module of the magnetic assembly with primary winding of the sixth embodiment of the present disclosure.

[0022] Figure 14 For the power conversion module Figure 13 Voltage signal waveform diagram of the key position of the power conversion module shown.

[0023] Symbol explanation

[0024] 1: traditional magnetic assembly

[0025] 11: center column

[0026] 12: winding

[0027] 2, 2a, 2b, 2c, 2d, 2e: magnetic assembly

[0028] 3: magnetic core assembly

[0029] 31a: first side

[0030] 31b: second side

[0031] 31c: third side

[0032] 31d: fourth side

[0033] 31e: fifth side

[0034] 31f: sixth side

[0035] 32: first common magnetic leg

[0036] 32a: first common sub-leg

[0037] 33: second common magnetic leg

[0038] 33a: second common sub-leg

[0039] 34: first coupling magnetic leg

[0040] 35: second coupling magnetic leg

[0041] 36: third coupling magnetic leg

[0042] 37: first magnetic cap

[0043] 38: second magnetic cap

[0044] 4: winding assembly

[0045] 41: first winding

[0046] 411: first input portion

[0047] 412: first intermediate portion

[0048] 413: first output portion

[0049] 414: first connection portion

[0050] 42: second winding

[0051] 421: second input portion

[0052] 422: second intermediate portion

[0053] 423: second output portion

[0054] 424: second connection portion

[0055] P: symmetry line

[0056] 5: power conversion module

[0057] Vin+: positive input terminal Vin-: negative input terminal

[0058] Vout+: positive output terminal

[0059] Vout-: negative output terminal

[0060] 51: first half-bridge leg

[0061] Q1A, Q2A: switching transistor

[0062] 52: second half-bridge leg

[0063] Q1B, Q2B: switching transistor

[0064] Cin: input capacitor

[0065] Co: output capacitor

[0066] C: control circuit

[0067] PWM1, PWM2: PWM switching signal

[0068] Vgs_Q1A, Vgs_Q2A, Vgs_Q1B, Vgs_Q2B: drive voltage signal 43: input lead

[0069] 44: output lead

[0070] 6: body

[0071] 61a: first surface

[0072] 61b: second surface

[0073] 61c: side wall surface

[0074] 61d: accommodation space

[0075] 71: fourth coupling magnetic column

[0076] 72: fifth coupling magnetic column

[0077] 81: primary winding

[0078] 82: first secondary winding

[0079] 83: second secondary winding

[0080] MA: first rectifier device

[0081] MB: second rectifier device

[0082] 9: external alternating voltage

[0083] UAB: AC pulse voltage DETAILED DESCRIPTION

[0084] Some exemplary embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can be varied in a wide range of embodiments, all of which are not departing from the scope of the present disclosure, and the description and drawings are essentially illustrative, not for limiting the present disclosure.

[0085] Referring to Figure 2 and Figure 3 wherein Figure 2 is a structural schematic diagram of a magnetic assembly of a first embodiment of the present disclosure, Figure 3 is Figure 2 The magnetic assembly 2 of the present embodiment comprises a magnetic core assembly 3 and a winding assembly 4, wherein the magnetic core assembly 3 and the winding assembly 4 cooperate to form an inductor. The magnetic core assembly 3 has a first side 31a, a second side 31b, a third side 31c, a fourth side 31d, a fifth side 31e and a sixth side 31f, wherein the first side 31a and the second side 31b are oppositely arranged, the third side 31c and the fourth side 31d are oppositely arranged and located between the first side 31a and the second side 31b, and the fifth side 31e and the sixth side 31f are oppositely arranged and located between the first side 31a and the second side 31b and between the third side 31c and the fourth side 31d. The magnetic core assembly 3 comprises a first common magnetic column 32, a second common magnetic column 33, a first coupling magnetic column 34, a second coupling magnetic column 35 and a third coupling magnetic column 36. The first common magnetic column 32, the second common magnetic column 33, the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 are independently arranged, the first common magnetic column 32 is adjacent to the first side 31a. The second common magnetic column 33 is adjacent to the second side 31b and oppositely arranged with the first common magnetic column 32. The first coupling magnetic column 34 is adjacent to the third side 31c and located between the first common magnetic column 32 and the second common magnetic column 33. The second coupling magnetic column 35 is located between the first common magnetic column 32 and the second common magnetic column 33 and between the first coupling magnetic column 34 and the third coupling magnetic column 36. The third coupling magnetic column 36 is adjacent to the fourth side 31d and located between the first common magnetic column 32 and the second common magnetic column 33, wherein the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 are sequentially and spacedly arranged.

[0086] As Figure 2 and Figure 3As shown, the magnetic core assembly 3 is an EE-type magnetic core structure, and in some embodiments, the magnetic core assembly 3 can be an EI-type magnetic core structure. The magnetic core assembly 3 includes a first magnetic cover 37 and a second magnetic cover 38. The first magnetic cover 37 is disposed opposite the second magnetic cover 38, the first magnetic cover 37 has opposite surfaces and a bottom surface, the surfaces of the first magnetic cover 37 form a fifth side 31e of the magnetic core assembly 3, the second magnetic cover 38 has opposite surfaces and a bottom surface, the surfaces of the second magnetic cover 38 form a sixth side 31f of the magnetic core assembly 3, and the first common magnetic leg 32, the second common magnetic leg 33, the first coupling magnetic leg 34, the second coupling magnetic leg 35, and the third coupling magnetic leg 36 are all located between the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38, and the two ends of the first common magnetic leg 32 are connected to the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38 respectively, the two ends of the second common magnetic leg 33 are connected to the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38 respectively, the two ends of the first coupling magnetic leg 34 are connected to the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38 respectively, the two ends of the second coupling magnetic leg 35 are connected to the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38 respectively, and the two ends of the third coupling magnetic leg 36 are connected to the bottom surface of the first magnetic cover 37 and the bottom surface of the second magnetic cover 38 respectively.

[0087] The winding assembly 4 comprises a first winding 41 and a second winding 42 which are overlapped with each other. The first winding 41 can be composed of a wiring in a printed circuit board, a copper strip embedded in the printed circuit board, an independent copper strip or an independent copper sheet, and comprises a first input portion 411, a first intermediate portion 412 and a first output portion 413 which are connected in sequence. The first input portion 411 is disposed between the first common magnetic column 32 and the first coupling magnetic column 34. The first intermediate portion 412 is disposed between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the second common magnetic column 33 and the second coupling magnetic column 35, and between the second coupling magnetic column 35 and the third coupling magnetic column 36. The first output portion 413 is disposed between the first common magnetic column 32 and the third coupling magnetic column 36. The first input portion 411 is a direct current input portion of the first winding 41, and the first output portion 413 is a direct current output portion of the first winding 41. The second winding 42 can be composed of a wiring in a printed circuit board, a copper strip embedded in the printed circuit board, an independent copper strip or an independent copper sheet, and comprises a second input portion 421, a second intermediate portion 422 and a second output portion 423 which are connected in sequence. The second input portion 421 is disposed between the second common magnetic column 33 and the first coupling magnetic column 34. The second intermediate portion 422 is disposed between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the first common magnetic column 32 and the second coupling magnetic column 35, and between the second coupling magnetic column 35 and the third coupling magnetic column 36. The second output portion 423 is disposed between the second common magnetic column 33 and the third coupling magnetic column 36. The second input portion 421 is a direct current input portion of the second winding 42, and the second output portion 423 is a direct current output portion of the second winding 42. Since the first intermediate portion 412 of the first winding 41 and the second intermediate portion 422 of the second winding 42 are both disposed between the first coupling magnetic column 34 and the second coupling magnetic column 35, the first intermediate portion 412 of the first winding 41 and the second intermediate portion 422 of the second winding 42 are overlapped or crossed with each other between the first coupling magnetic column 34 and the second coupling magnetic column 35. Since the first intermediate portion 412 of the first winding 41 and the second intermediate portion 422 of the second winding 42 are both disposed between the second coupling magnetic column 35 and the third coupling magnetic column 36, the first intermediate portion 412 of the first winding 41 and the second intermediate portion 422 of the second winding 42 are also overlapped or crossed with each other between the second coupling magnetic column 35 and the third coupling magnetic column 36. An insulating medium (not shown) can be provided between the first winding 41 and the second winding 42 to isolate the overlapped positions of the first winding 41 and the second winding 42 from each other.

[0088] As can be seen from the above, the first intermediate portion 412 of the first winding 41 and the second intermediate portion 422 of the second winding 42 of the magnetic assembly 2 of the present disclosure are both arranged between the first coupling magnetic column 34 and the second coupling magnetic column 35, and are both arranged between the second coupling magnetic column 35 and the third coupling magnetic column 36, so that there are two overlapping portions (or intersection portions) between the first winding 41 and the second winding 42, and the first winding 41 and the second winding 42 intersect twice. Compared with the two windings 12 of the conventional magnetic assembly 1 which only have one overlapping portion, the first winding 41 and the second winding 42 of the magnetic assembly 2 of the present disclosure intersect multiple times. The winding method of the first winding 41 and the second winding 42 of the present disclosure is such that 50% of the alternating magnetic flux generated by the first winding 41 and the second winding 42, respectively, flows through the second coupling magnetic column 35 after being subtracted in phase, and then the alternating magnetic flux is approximately equally divided into two parts, which respectively pass through the first coupling magnetic column 34 and the third coupling magnetic column 36 to be closed. 50% of the alternating magnetic flux generated by the first winding 41 and the second winding 42, respectively, flows through the first common magnetic column 32 after being added in phase, and then passes through the second common magnetic column 33 to be closed. In summary, the portion of the alternating magnetic flux generated by the first winding 41 and the second winding 42 which flows through the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 is subtracted in phase, and is referred to as a coupling magnetic column. The portion of the alternating magnetic flux generated by the first winding 41 and the second winding 42 which flows through the first common magnetic column 32 and the second common magnetic column 33 is added in phase, and is referred to as a common magnetic column. In addition, the winding method of the first winding 41 and the second winding 42 of the present disclosure is such that the direct current magnetic flux generated by the first winding 41 on the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 is subtracted in amplitude from the direct current magnetic flux generated by the second winding 42 on the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36. The direct current magnetic flux generated by the first winding 41 on the first common magnetic column 32 and the second common magnetic column 33 is added in amplitude from the direct current magnetic flux generated by the second winding 42 on the first common magnetic column 32 and the second common magnetic column 33.

[0089] The first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 of the magnetic assembly 2 of the present disclosure form an E-shaped structure in combination with the first magnetic cover 37 and the second magnetic cover 38, and the alternating magnetic flux flows through the second coupling magnetic column 35 and then closes via the first coupling magnetic column 34 and the third coupling magnetic column 36, respectively. Compared with the U-shaped structure formed by the two middle columns 11 in combination with the upper magnetic cover and the lower magnetic cover in the conventional magnetic assembly 1, and the alternating magnetic flux closes via the two middle columns, the thickness of the magnetic cover of the magnetic assembly of the present disclosure can be greatly reduced, thereby obtaining the benefits of thinness and low thermal conduction resistance of the magnetic assembly.

[0090] Please refer to Figure 4 and Figure 5 in combination with Figure 2 and Figure 3wherein Figure 4 is a power conversion module comprising Figure 2 is a structural schematic diagram of the power conversion module with the magnetic assembly shown in Figure 5 is Figure 4 is a voltage signal waveform diagram of the switch tube of the half-bridge leg of the power conversion module shown in. For the convenience of displaying the structural features of the winding assembly 4, Figure 4 only the second magnetic cover 38 of the magnetic core assembly 3 is shown in the figure, and the first magnetic cover 37 of the magnetic core assembly 3 is not shown. As shown in the figure, Figure 2 and Figure 3 The magnetic assembly 2 can be applied to Figure 4 the power conversion module 5 shown in the figure, the power conversion module 5 of the embodiment is a two-phase interleaved parallel type Buck circuit, and the power conversion module 5 comprises a first half-bridge leg 51, a second half-bridge leg 52, an input capacitor Cin, an output capacitor Co and a control circuit C in addition to the magnetic assembly 2, wherein the magnetic assembly 2, the first half-bridge leg 51, the second half-bridge leg 52, the input capacitor Cin and the output capacitor Co are arranged along the horizontal direction to jointly constitute the power conversion module 5 with a horizontal structure; the first half-bridge leg 51 is located at the third side 31c of the magnetic core assembly 3 (i.e. the side of the first coupling magnetic column 34 away from the third coupling magnetic column 36), and is composed of two switch tubes Q1A, Q2A, the two switch tubes Q1A, Q2A are electrically connected, and the connection SWA between the two switch tubes Q1A, Q2A is connected with the first input part 411 of the first winding 41 to form a phase B Buck circuit with the inductance composed of the first winding 41. The second half-bridge leg 52 is located at the third side 31c of the magnetic core assembly 3 (i.e. the side of the first coupling magnetic column 34 away from the third coupling magnetic column 36), and is composed of two switch tubes Q1B, Q2B, the two switch tubes Q1B, Q2B are electrically connected, and the connection SWB between the two switch tubes Q1B, Q2B is connected with the second input part 421 of the second winding 42 to form another phase B Buck circuit with another inductance composed of the second winding 42.

[0091] The first end of the first half-bridge leg 51 and the first end of the second half-bridge leg 52 are electrically connected in parallel and then electrically connected to one end of the input capacitor Cin, and constitute a positive input terminal Vin+ of the power conversion module 5. The second end of the first half-bridge leg 51 and the second end of the second half-bridge leg 52 are electrically connected in parallel and then electrically connected to the other end of the input capacitor Cin, and constitute a negative input terminal Vin- of the power conversion module 5. One end of the output capacitor Co and the first output portion 413 of the first winding 41 and the second output portion 423 of the second winding 42 are electrically connected, and constitute a positive output terminal Vout+ of the power conversion module 5, wherein the connection between the first output portion 413 of the first winding 41 and the second output portion 423 of the second winding 42 is adjacent to the side of the third coupling magnetic column 36 away from the first coupling magnetic column 34, that is, the fourth side 31d of the magnetic core assembly 3. The other end of the output capacitor Co constitutes a negative output terminal Vout- of the power conversion module 5, wherein the negative input terminal Vin- and the negative output terminal Vout- of the power conversion module 5 are short-circuited. The first alternating voltage is applied between the first input portion 411 and the first output portion 413 of the first winding 41, and the second alternating voltage is applied between the second input portion 421 and the second output portion 423 of the second winding 42. Figure 4 In the power conversion module 5 of this horizontal structure, the first half-bridge leg 51 and the second half-bridge leg 52 of the horizontal two-phase interleaved parallel type step-down conversion circuit are arranged on the left side of the first coupling magnetic column 34, and the positive output terminal Vout+ and the output capacitor Co of the two-phase interleaved parallel type step-down conversion circuit are arranged on the right side of the third coupling magnetic column 36, so that the distances between the two bridge arm midpoints SWA and SWB and the positive output terminal Vout+ are the shortest. The advantage obtained is that the parasitic resistance of the winding assembly 4 of the magnetic assembly 2 is the smallest, that is, the parasitic resistance of the first winding 41 and the second winding 42 is the smallest, thereby minimizing the conduction loss of the winding assembly 4.

[0092] The control circuit C is electrically connected with a driving circuit (not shown) for driving the switching tubes Q1A, Q2A, Q1B and Q2B, and generates two groups of PWM switching signals PWM1 and PWM2, so that the driving circuit drives the switching tubes Q1A and Q2A according to the PWM switching signal PWM1, and drives the switching tubes Q1B and Q2B according to the PWM switching signal PWM2. The driving voltage signals of the four switching tubes Q1A, Q2A, Q1B and Q2B are as follows: Figure 5As shown, the drive voltage signals VGS_Q1A, VGS_Q2A of the two switch tubes Q1A, Q2A of the first half-bridge arm 51 are complementary conduction, the duty ratio of which is denoted by D, the drive voltage signals VGS_Q1B, VGS_Q2B of the two switch tubes Q1B, Q2B of the second half-bridge arm 52 are complementary conduction, the duty ratio of which is denoted by D, and the drive voltage signal VGS_Q1A of the switch tube Q1A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q1B of the switch tube Q1B of the second half-bridge arm 52, and the drive voltage signal VGS_Q2A of the switch tube Q2A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q2B of the switch tube Q2B of the second half-bridge arm 52, so as to make the voltage signal used to control the first alternating voltage of the first winding 41 out of phase 150-210 degrees, for example, 180 degrees, with the voltage signal used to control the second alternating voltage of the second winding 42. Figure 5 As shown, the drive voltage signals VGS_Q1A, VGS_Q2A of the two switch tubes Q1A, Q2A of the first half-bridge arm 51 are complementary conduction, the duty ratio of which is denoted by D, the drive voltage signals VGS_Q1B, VGS_Q2B of the two switch tubes Q1B, Q2B of the second half-bridge arm 52 are complementary conduction, the duty ratio of which is denoted by D, and the drive voltage signal VGS_Q1A of the switch tube Q1A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q1B of the switch tube Q1B of the second half-bridge arm 52, and the drive voltage signal VGS_Q2A of the switch tube Q2A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q2B of the switch tube Q2B of the second half-bridge arm 52, so as to make the voltage signal used to control the first alternating voltage of the first winding 41 out of phase 150-210 degrees, for example, 180 degrees, with the voltage signal used to control the second alternating voltage of the second winding 42. Figure 5 As shown, the drive voltage signals VGS_Q1A, VGS_Q2A of the two switch tubes Q1A, Q2A of the first half-bridge arm 51 are complementary conduction, the duty ratio of which is denoted by D, the drive voltage signals VGS_Q1B, VGS_Q2B of the two switch tubes Q1B, Q2B of the second half-bridge arm 52 are complementary conduction, the duty ratio of which is denoted by D, and the drive voltage signal VGS_Q1A of the switch tube Q1A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q1B of the switch tube Q1B of the second half-bridge arm 52, and the drive voltage signal VGS_Q2A of the switch tube Q2A of the first half-bridge arm 51 is out of phase 150-210 degrees, for example, 180 degrees, with the drive voltage signal VGS_Q2B of the switch tube Q2B of the second half-bridge arm 52, so as to make the voltage signal used to control the first alternating voltage of the first winding 41 out of phase 150-210 degrees, for example, 180 degrees, with the voltage signal used to control the second alternating voltage of the second winding 42.

[0093] According to the operation of the two switch tubes Q1A, Q2A of the first half-bridge arm 51 and the two switch tubes Q1B, Q2B of the second half-bridge arm 52, the direct current of the first winding 41 of the winding assembly 4 sequentially flows through the first input portion 411, the first intermediate portion 412, and the first output portion 413, and passes through the magnetic core assembly 3 at one time, and the direct current of the second winding 42 of the winding assembly 4 sequentially flows through the second input portion 421, the second intermediate portion 422, and the second output portion 423, and passes through the magnetic core assembly 3 at one time.

[0094] Since the DC magnetic flux generated by the first winding 41 on the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 is subtracted by the DC magnetic flux generated by the second winding 42 on the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 in terms of amplitude, the first winding 41 and the second winding 42 can reach the DC current of the first winding 41 equal to the DC current of the second winding 42 according to the control of the current sharing circuit (not shown), further making the DC magnetic flux on the first coupling magnetic column 34, the DC magnetic flux on the second coupling magnetic column 35 and the DC magnetic flux on the third coupling magnetic column 36 approach to zero, so that the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36 can have air gaps, and the material thereof can be ferrite or high magnetic permeability iron powder.

[0095] Since the DC magnetic flux generated by the first winding 41 on the first common magnetic column 32 and the second common magnetic column 33 is added by the DC magnetic flux generated by the second winding 42 on the first common magnetic column 32 and the second common magnetic column 33 in terms of amplitude, the first common magnetic column 32 and the second common magnetic column 33 can have air gaps, and the material thereof can be ferrite or low magnetic permeability iron powder to prevent the first common magnetic column 32 and the second common magnetic column 33 from being magnetically saturated. In some embodiments, the first common column air gap of the first common magnetic column 32 is located between the first common magnetic column 32 and the first magnetic cover 37, and / or the first common column air gap of the first common magnetic column 32 is located between the first common magnetic column 32 and the second magnetic cover 38, and / or the first common column air gap of the first common magnetic column 32 is located at the middle position of the first common magnetic column 32. The second common column air gap of the second common magnetic column 33 is located between the second common magnetic column 33 and the first magnetic cover 37, and / or the second common column air gap of the second common magnetic column 33 is located between the second common magnetic column 33 and the second magnetic cover 38, and / or the second common column air gap of the second common magnetic column 33 is located at the middle position of the second common magnetic column 33.

[0096] In other embodiments, when the DC current of the first winding 41 is not exactly equal to the DC current of the second winding 42, such that the DC magnetic flux on the first coupling magnetic column 34, the DC magnetic flux on the second coupling magnetic column 35, and the DC magnetic flux on the third coupling magnetic column 36 are not equal to zero, the first coupling magnetic column 34 should have a first coupling column air gap, the second coupling magnetic column 35 should have a second coupling column air gap, and the third coupling magnetic column 36 should have a third coupling column air gap to prevent the first coupling magnetic column 34, the second coupling magnetic column 35, and the third coupling magnetic column 36 from magnetic saturation. The length of the first common column air gap of the first common magnetic column 32 and the length of the second common column air gap of the second common magnetic column 33 are respectively greater than the length of the first coupling column air gap of the first coupling magnetic column 34, the length of the second coupling column air gap of the second coupling magnetic column 35, and the length of the third coupling column air gap of the third coupling magnetic column 36. In some embodiments, the first coupling column air gap of the first coupling magnetic column 34 is located between the first coupling magnetic column 34 and the first magnetic cover 37, and / or the first coupling column air gap of the first coupling magnetic column 34 is located between the first coupling magnetic column 34 and the second magnetic cover 38, and / or the first coupling column air gap of the first coupling magnetic column 34 is located at the middle position of the first coupling magnetic column 34. The second coupling column air gap of the second coupling magnetic column 35 is located between the second coupling magnetic column 35 and the first magnetic cover 37, and / or the second coupling column air gap of the second coupling magnetic column 35 is located between the second coupling magnetic column 35 and the second magnetic cover 38, and / or the second coupling column air gap of the second coupling magnetic column 35 is located at the middle position of the second coupling magnetic column 35. The third coupling column air gap of the third coupling magnetic column 36 is located between the third coupling magnetic column 36 and the first magnetic cover 37, and / or the third coupling column air gap of the third coupling magnetic column 36 is located between the third coupling magnetic column 36 and the second magnetic cover 38, and / or the third coupling column air gap of the third coupling magnetic column 36 is located at the middle position of the third coupling magnetic column 36. In some embodiments, the reluctance of the first common magnetic column 32 and the reluctance of the second common magnetic column 33 are respectively greater than three times the reluctance of the first coupling magnetic column 34, three times the reluctance of the second coupling magnetic column 35, or three times the reluctance of the third coupling magnetic column 36. In other embodiments, the reluctance of the first common magnetic column 32 and the reluctance of the second common magnetic column 33 are respectively greater than five times the reluctance of the first coupling magnetic column 34, five times the reluctance of the second coupling magnetic column 35, or five times the reluctance of the third coupling magnetic column 36.

[0097] According to the alternating current magnetic flux characteristics of the coupling magnetic columns and the common magnetic columns, the alternating current magnetic flux of the second coupling magnetic column 35 is large, but the air gap and the magnetic resistance are small, and the air gap of the second common magnetic column 33 is large and the magnetic resistance is large, but the alternating current magnetic flux is small, so that the alternating current of the first winding 41 passing through the first common magnetic column 32 and the first coupling magnetic column 34 is small. Similarly, the alternating current magnetic flux of the second coupling magnetic column 35 is large, but the air gap and the magnetic resistance are small, and the air gap of the first common magnetic column 32 is large and the magnetic resistance is large, but the alternating current magnetic flux is small, so that the alternating current of the second winding 42 passing through the second common magnetic column 33 and the first coupling magnetic column 34 is small. Further, in order to obtain smaller alternating current of the first winding 41 and the second winding 42, the first coupling magnetic column 34 and the third coupling magnetic column 36 have a closed loop through the first magnetic cover 37 or the second magnetic cover 38, and in some embodiments, the closed loop is composed of ferrite material or high magnetic permeability iron powder material at the position of the first magnetic cover 37 and the second magnetic cover 38.

[0098] In some embodiments, in order to optimize the performance of the magnetic assembly 2, improve the equivalent inductance obtained by each winding of the magnetic assembly 2, and reduce the loss of the magnetic core assembly 3, the material constituting the first coupling magnetic column 34, the material constituting the second coupling magnetic column 35 and the material constituting the third coupling magnetic column 36 are different from the material constituting the first common magnetic column 32 and the material constituting the second common magnetic column 33. For example, the material constituting the first coupling magnetic column 34, the material constituting the second coupling magnetic column 35 and the material constituting the third coupling magnetic column 36 are low-loss materials such as ferrite materials without air gap or with small air gap, or high magnetic permeability iron powder materials, which are used to reduce the core loss of the first coupling magnetic column 34, the second coupling magnetic column 35 and the third coupling magnetic column 36. The material constituting the first common magnetic column 32 and the material constituting the second common magnetic column 33 are ferrite materials with large air gap, or iron powder materials with distributed air gap and low magnetic permeability, so that the magnetic saturation density of the first common magnetic column 32 and the second common magnetic column 33 is greatly increased.

[0099] Please refer to Figure 2 and Figure 3The line between the center of the first side 31a and the center of the second side 31b of the magnetic core assembly 3 is defined as the symmetry line P, the first common magnetic leg 32 and the second common magnetic leg 33 of the magnetic core assembly 3 are mirror-symmetrical with respect to the symmetry line P, the structure of the first winding 41 is mirror-symmetrical with respect to the symmetry line P, the structure of the second winding 42 is mirror-symmetrical with respect to the symmetry line P, the structure of the second coupling magnetic leg 35 is mirror-symmetrical with respect to the symmetry line P, and the first coupling magnetic leg 34 and the third coupling magnetic leg 36 are mirror-symmetrical with respect to the symmetry line P. The obtained advantage is that the alternating magnetic flux density of the first coupling magnetic leg 34, the second coupling magnetic leg 35 and the third coupling magnetic leg 36 is approximately equal, so that the magnetic core loss density is approximately equal, and the magnetic core loss is minimized. Furthermore, the first common magnetic leg 32 and the second common magnetic leg 33 of the magnetic core assembly 3 are mirror-symmetrical with respect to the second coupling magnetic leg 35, and the structure of the first winding 41 and the structure of the second winding 42 are mirror-symmetrical with respect to the second coupling magnetic leg 35. The obtained advantage is that the direct magnetic flux density of the first common magnetic leg 32 and the second common magnetic leg 33 is approximately equal, so that the magnetic core anti-saturation capability is the strongest.

[0100] In some embodiments, the first half-bridge leg 51, the second half-bridge leg 52, the first winding 41 and the second winding 42 of the power conversion module 5 are arranged in a horizontal direction, so that the power conversion module 5 forms a horizontal structure, and the first half-bridge leg 51, the second half-bridge leg 52, the first winding 41 and the second winding 42 are collectively integrated in one printed circuit board or plastic package, or can be integrated in any other form of connection mode. Figure 4 In some embodiments, the longitudinal projection of the first half-bridge leg 51 on a second virtual plane in the X direction partially overlaps with the longitudinal projection of the first winding 41 on the second virtual plane in the X direction, and the longitudinal projection of the first half-bridge leg 51 on the second virtual plane in the X direction partially overlaps with the longitudinal projection of the second winding 42 on the second virtual plane in the X direction. Of course, the longitudinal projection of the second half-bridge leg 52 on the second virtual plane in the X direction partially overlaps with the longitudinal projection of the first winding 41 on the second virtual plane in the X direction, and the longitudinal projection of the second half-bridge leg 52 on the second virtual plane in the X direction partially overlaps with the longitudinal projection of the second winding 42 on the second virtual plane in the X direction.

[0101] In other embodiments, the magnetic assembly 2 forms a separate surface-mounted device, please refer to Figure 6 and Figure 7 , wherein Figure 6 is a structural schematic diagram of the magnetic assembly of the second embodiment of the present disclosure, Figure 7 is Figure 6The diagram shows an exploded view of the magnetic component. As shown, compared to... Figure 2 and Figure 3 The magnetic component 2a in this embodiment further includes two input conductors 43 and two output conductors 44. The magnetic component 2a is electrically connected to the system board (not shown) via the two input conductors 43 and the two output conductors 44. The two input conductors 43 are respectively used to construct... Figure 4 The SWA and SWB terminals are shown, and two input conductors 43 are disposed on the sixth side 31f of the magnetic core assembly 3, i.e., located on the surface of the second magnetic cover 38 (or embedded in the surface of the second magnetic cover 38). The first input portion 411 of the first winding 41 extends from between the first common magnetic post 32 and the first coupling magnetic post 34 toward the second magnetic cover 38 and is connected to one of the two input conductors 43. The second input portion 421 of the second winding 42 extends from between the second common magnetic post 33 and the first coupling magnetic post 34 toward the second magnetic cover 38 and is connected to the other input conductor 43. Two output conductors 44 are used to form Figure 4 The positive output terminal Vout+ is shown, and the two output conductors 44 are disposed on the sixth side 31f of the magnetic core assembly 3, that is, on the surface of the second magnetic cover 38 (or embedded in the surface of the second magnetic cover 38). The first output portion 413 of the first winding 41 extends from between the first common magnetic post 32 and the third coupling magnetic post 36 toward the second magnetic cover 38 and is connected to one of the output conductors 44. The second output portion 423 of the second winding 42 extends from between the second common magnetic post 33 and the third coupling magnetic post 36 toward the second magnetic cover 38 and is connected to the other output conductor 44 of the two output conductors 44.

[0102] In this embodiment, to improve the yield of the magnetic component 2a, the first common magnetic post 32 includes a plurality of first common sub-magnetic posts 32a, for example... Figure 7 The two first common sub-magnetic pillars 32a shown are spaced apart and arranged sequentially between the third side 31c and the fourth side 31d of the magnetic core assembly 3. The second common magnetic pillar 33 includes a plurality of second common sub-magnetic pillars 33a, for example... Figure 7 The two second common sub-magnetic pillars 33a shown are spaced apart and arranged sequentially between the third side 31c and the fourth side 31d of the magnetic core assembly 3. Of course, the first common magnetic pillar 32 can be further divided into more first common sub-magnetic pillars 32a, or into multiple first common sub-magnetic pillars 32a of different lengths, and the second common magnetic pillar 33 can also be divided into more second common sub-magnetic pillars 33a, or into multiple second common sub-magnetic pillars 33a of different lengths.

[0103] In other embodiments, the input lead 43 and the output lead 44 are not limited to be disposed on the sixth side 31f of the magnetic core assembly 3. The two input leads 43 can be disposed on the fifth side 31e of the magnetic core assembly 3, and the two output leads 44 can be disposed on the sixth side 31f of the magnetic core assembly 3. When the magnetic assembly 2a is applied to a power conversion module, the magnetic assembly and the first half-bridge leg 51 and the second half-bridge leg 52 can be vertically stacked. Specifically, the first half-bridge leg 51 and the second half-bridge leg 52 are disposed above the magnetic assembly, so that the device with the largest heat generation in the power conversion module, i.e., the power conversion module hotspot (the first half-bridge leg 51 and the second half-bridge leg 52) is located at the top of the power conversion module. The benefits are that the power conversion module hotspot has the smallest thermal resistance at the top, and a heat-conducting medium such as a metal heat sink or a metal heat dissipation substrate can be added to the top of the power conversion module to effectively reduce the temperature of the power conversion module hotspot.

[0104] As shown in Figure 4 , the first half-bridge leg 51, the second half-bridge leg 52, the first winding 41, and the second winding 42 of the power conversion module 5 can be disposed in a vertical direction to have a vertical stacking structure. The first half-bridge leg 51, the second half-bridge leg 52, the first winding 41, and the second winding 42 are integrated on a printed circuit board or in a plastic package, or can be integrated in any other form. The horizontal projection of the first half-bridge leg 51 on a first virtual plane in the Y direction partially overlaps the horizontal projection of the first winding 41 on the first virtual plane in the Y direction, and the horizontal projection of the first half-bridge leg 51 on the first virtual plane in the Y direction partially overlaps the horizontal projection of the second winding 42 on the first virtual plane in the Y direction. Of course, the horizontal projection of the second half-bridge leg 52 on the first virtual plane in the Y direction partially overlaps the horizontal projection of the first winding 41 on the first virtual plane in the Y direction, and the horizontal projection of the second half-bridge leg 52 on the first virtual plane in the Y direction partially overlaps the horizontal projection of the second winding 42 on the first virtual plane in the Y direction.

[0105] Please refer to Figure 8A , Figure 8B and Figure 9 in combination with Figure 4 , wherein Figure 8A is a structural schematic diagram of a magnetic assembly of a third embodiment of the present disclosure, Figure 8B is a structural schematic diagram of another view of the magnetic assembly shown in Figure 8A , Figure 9 is a structural schematic diagram of another view of the magnetic assembly shown in Figure 8AAn exploded view of the magnetic assembly is shown. As shown, compared to the magnetic assembly 2 of Figure 2 and Figure 3 The magnetic assembly 2b of the present embodiment further comprises a body 6, which can be formed by, but not limited to, a circuit board or a copper strip with a plastic encapsulation process, and comprises a first surface 61a, a second surface 61b, a plurality of side wall surfaces 61c, a receiving space 61d, and a conductive layer. The first surface 61a and the second surface 61b are oppositely arranged. The plurality of side wall surfaces 61c are arranged between the first surface 61a and the second surface 61b. The receiving space 61d is defined by the first surface 61a, the second surface 61b, and the plurality of side wall surfaces 61c, and is used to accommodate the magnetic core assembly 3 and the winding assembly 4, i.e., the first common magnetic column 32, the second common magnetic column 33, the first coupling magnetic column 34, the second coupling magnetic column 35, the third coupling magnetic column 36, the first winding 41, and the second winding 42 are all arranged in the body 6 and located between the plurality of side wall surfaces 61c, wherein the shape of the receiving space 61d corresponds to the structural shape of the magnetic core assembly 3. In the present embodiment, the first surface 61a of the body 6 is adjacent to the first magnetic cover 37, the second surface 61b of the body 6 is adjacent to the second magnetic cover 38, and in order to facilitate electrical connection with the system board, the distance between the first surface 61a and the second surface 61b of the body 6 is greater than the distance between the surface of the first magnetic cover 37 (i.e., the fifth side 31e of the magnetic core assembly 3) and the surface of the second magnetic cover 38 (i.e., the sixth side 31f of the magnetic core assembly 3), so that the magnetic core assembly 4 is completely covered in the body 6. The conductive layer is formed by wiring in the body 6 and is electrically connected with the first input portion 411 and the first output portion 413 of the first winding 41, the second input portion 421 and the second output portion 423 of the second winding 42.

[0106] In order to reduce the direct current impedance between the first winding 41 and the second winding 42 and the positive output terminal Vout+ of the power conversion module 5 and reduce the asymmetry of the direct current impedance, the first output portion 413 of the first winding 41 and the second output portion 423 of the second winding 42 are short-circuited to form Figure 4 the positive output terminal Vout+ of the power conversion module 5 as shown. The magnetic assembly 2b of the present embodiment further comprises two input lead portions 43 and one output lead portion 44, and the magnetic assembly 2a is electrically connected with the system board (not shown) by the two input lead portions 43 and the output lead portion 44. The two input lead portions 43 are used to form Figure 4 the SWA terminal and the SWB terminal as shown, and the two input lead portions 43 are arranged on (or embedded in) the first surface 61a of the body 6, and the two input lead portions 43 are electrically connected with the first input portion 411 of the first winding 41 and the second input portion 421 of the second winding 42 through the conductive layer of the body 6. The output lead portion 44 is used to form Figure 4The positive output terminal Vout+ is shown, and the output lead 44 is disposed on the second surface 61b of the body 6 (or embedded in the second surface 61b of the body 6), and the output lead 44 is electrically connected to the first output portion 413 of the first winding 41 and the second output portion 423 of the second winding 42 through the conductive layer of the body 6, respectively. Of course, the positions of the two input leads 43 and the output lead 44 are not limited to the above, but can be disposed on the first surface 61a, the second surface 61b, or the plurality of side wall surfaces 61c of the body 6 according to requirements. In some embodiments, the conductive layer, the first winding 41, the second winding 42, the input lead 43, and the output lead 44 can be an integral structure. In some embodiments, the plurality of side wall surfaces 61c of the body 6 also include conductive bodies for transmitting control signals, feedback signals, and power signals.

[0107] For the application of the two-phase interleaved parallel type step-down conversion circuit with large duty cycle, the AC magnetic flux of the second coupling magnetic column 35 is much larger than the AC magnetic flux of the first common magnetic column 32 or the AC magnetic flux of the second common magnetic column 33, and the sum of the cross-sectional areas of the first common magnetic column 32 and the second common magnetic column 33 can be designed to be less than or equal to the sum of the cross-sectional areas of the first coupling magnetic column 34, the second coupling magnetic column 35, and the third coupling magnetic column 36, which helps to reduce the loss of the magnetic core assembly 3; for the application of the two-phase interleaved parallel type step-down conversion circuit with small duty cycle, the AC magnetic flux of the second coupling magnetic column 35 is slightly larger than the AC magnetic flux of the first common magnetic column 32 or the AC magnetic flux of the second common magnetic column 33, and the sum of the cross-sectional areas of the first common magnetic column 32 and the second common magnetic column 33 can be designed to be greater than the sum of the cross-sectional areas of the first coupling magnetic column 34, the second coupling magnetic column 35, and the third coupling magnetic column 36, which helps to reduce the ripple current of the first winding 41 and the second winding 42, and improves the current anti-saturation capability of the first common magnetic column 32 and the second common magnetic column 33. Alternatively, in some embodiments, the cross-sectional area of the first common magnetic column 32 is equal to the cross-sectional area of the second common magnetic column 33, and the cross-sectional area of the first common magnetic column 32 and the cross-sectional area of the second common magnetic column 33 can have a positive or negative error of 25%; the cross-sectional area of the first coupling magnetic column 34 is equal to the cross-sectional area of the third coupling magnetic column 36, and the cross-sectional area of the first coupling magnetic column 34 and the cross-sectional area of the third coupling magnetic column 36 can have a positive or negative error of 25%; the cross-sectional area of the second coupling magnetic column 35 is equal to the sum of the cross-sectional areas of the first coupling magnetic column 34 and the third coupling magnetic column 36, and the cross-sectional area of the second coupling magnetic column 35, the sum of the cross-sectional areas of the first coupling magnetic column 34 and the third coupling magnetic column 36 can have a positive or negative error of 25%.

[0108] In some embodiments, for the application of high duty cycle and high output voltage of two-phase interleaved parallel buck converter, the volt-second product of each winding is further increased, the number of coupled magnetic columns of the magnetic assembly 2 can be further increased to reduce the core loss of the coupled magnetic columns of the magnetic assembly 2. Please refer to Figure 10 which is an exploded structural diagram of the magnetic assembly of the fourth embodiment of the present disclosure. As shown in the figure, compared with the magnetic assembly 2 shown in Figure 2 , which only includes the first coupled magnetic column 34, the second coupled magnetic column 35 and the third coupled magnetic column 36, the magnetic assembly 2c of the present embodiment further includes a fourth coupled magnetic column 71. In the present embodiment, the first coupled magnetic column 34 is adjacent to the third side 31c, the fourth coupled magnetic column 71 is adjacent to the fourth side 31d, the first coupled magnetic column 34, the second coupled magnetic column 35, the third coupled magnetic column 36 and the fourth coupled magnetic column 71 are arranged in sequence and located between the first common magnetic column 32 and the second common magnetic column 33. Furthermore, the cross-sectional area of the first coupled magnetic column 34 is smaller than that of the second coupled magnetic column 35, and the first coupled magnetic column 34 and the second coupled magnetic column 35 satisfy mirror symmetry with the third coupled magnetic column 36 and the fourth coupled magnetic column 71, respectively.

[0109] The first input portion 411 of the first winding 41 is threaded between the first common magnetic column 32 and the first coupled magnetic column 34. The first intermediate portion 412 of the first winding 41 is threaded between the first coupled magnetic column 34 and the second coupled magnetic column 35, between the second common magnetic column 33 and the second coupled magnetic column 35, between the second coupled magnetic column 35 and the third coupled magnetic column 36, between the third coupled magnetic column 36 and the first common magnetic column 32, and between the third coupled magnetic column 36 and the fourth coupled magnetic column 71. The first output portion 413 of the first winding 41 is threaded between the second common magnetic column 33 and the fourth coupled magnetic column 71. The second input portion 421 of the second winding 42 is threaded between the second common magnetic column 33 and the first coupled magnetic column 34. The second intermediate portion 422 of the second winding 42 is threaded between the first coupled magnetic column 34 and the second coupled magnetic column 35, between the first common magnetic column 32 and the second coupled magnetic column 35, between the second coupled magnetic column 35 and the third coupled magnetic column 36, between the third coupled magnetic column 36 and the second common magnetic column 33, and between the third coupled magnetic column 36 and the fourth coupled magnetic column 71. The second output portion 423 of the second winding 42 is threaded between the first common magnetic column 32 and the fourth coupled magnetic column 71. In the above-mentioned embodiments, the number of intersections between the first winding and the second winding is increased from two to three, and the benefit is that the core loss of the coupled magnetic columns is reduced by increasing the cross-sectional area of the coupled magnetic columns while the thickness of the magnetic cover remains unchanged.

[0110] Please refer to Figure 11 and Figure 12 , wherein Figure 11 is a structural diagram of the magnetic assembly of the fifth embodiment of the present disclosure, Figure 12For Figure 11 An exploded structural diagram of the magnetic assembly is shown in FIG. 7. As shown, compared to the magnetic assembly 2 shown in FIG. 6, the magnetic assembly 2d of the present embodiment further comprises a fourth coupling magnetic column 71 and a fifth coupling magnetic column 72. Figure 2 Figure 3 The magnetic assembly 2 shown in FIG. 7 comprises the first coupling magnetic column 34, the second coupling magnetic column 35, the third coupling magnetic column 36, the fourth coupling magnetic column 71 and the fifth coupling magnetic column 72. In the present embodiment, the first coupling magnetic column 34 is adjacent to the third side 31c, the fifth coupling magnetic column 72 is adjacent to the fourth side 31d, and the first coupling magnetic column 34, the second coupling magnetic column 35, the third coupling magnetic column 36, the fourth coupling magnetic column 71 and the fifth coupling magnetic column 72 are sequentially arranged between the first common magnetic column 32 and the second common magnetic column 33.

[0111] The first input portion 411 of the first winding 41 is threaded between the first common magnetic column 32 and the first coupling magnetic column 34. The first intermediate portion 412 of the first winding 41 is threaded multiple times between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the second common magnetic column 33 and the second coupling magnetic column 35, between the second coupling magnetic column 35 and the third coupling magnetic column 36, between the third coupling magnetic column 36 and the first common magnetic column 32, between the third coupling magnetic column 36 and the fourth coupling magnetic column 71, between the second common magnetic column 33 and the fourth coupling magnetic column 71, and between the fourth coupling magnetic column 71 and the fifth coupling magnetic column 72, so that the direct current of the first winding 41 flows between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the second common magnetic column 33 and the second coupling magnetic column 35, between the second coupling magnetic column 35 and the third coupling magnetic column 36, between the third coupling magnetic column 36 and the first common magnetic column 32, between the third coupling magnetic column 36 and the fourth coupling magnetic column 71, between the second common magnetic column 33 and the fourth coupling magnetic column 71, and between the fourth coupling magnetic column 71 and the fifth coupling magnetic column 72 multiple times. In the present embodiment, the first intermediate portion 412 of the first winding 41 is threaded between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the second common magnetic column 33 and the second coupling magnetic column 35, between the second coupling magnetic column 35 and the third coupling magnetic column 36, between the third coupling magnetic column 36 and the first common magnetic column 32, between the third coupling magnetic column 36 and the fourth coupling magnetic column 71, between the second common magnetic column 33 and the fourth coupling magnetic column 71, and between the fourth coupling magnetic column 71 and the fifth coupling magnetic column 72 twice. The first output portion 413 of the first winding 41 is threaded between the first common magnetic column 32 and the fifth coupling magnetic column 72.

[0112] ​The second input portion 421 of the second winding 42 is disposed between the second common magnetic post 33 and the first coupling magnetic post 34. The second intermediate portion 422 of the second winding 42 is repeatedly passed between the first coupling magnetic post 34 and the second coupling magnetic post 35, between the first common magnetic post 32 and the second coupling magnetic post 35, between the second coupling magnetic post 35 and the third coupling magnetic post 36, between the third coupling magnetic post 36 and the second common magnetic post 33, between the third coupling magnetic post 36 and the fourth coupling magnetic post 71, between the first common magnetic post 32 and the fourth coupling magnetic post 71, and between the fourth coupling magnetic post 71 and the fifth coupling magnetic post 72. This results in the DC current of the second winding 42 flowing through the first coupling magnetic post 34 and the second coupling magnetic post 35, between the first common magnetic post 32 and the second coupling magnetic post 35, between the second coupling magnetic post 35 and the third coupling magnetic post 36, between the third coupling magnetic post 36 and the second common magnetic post 33, between the third coupling magnetic post 36 and the fourth coupling magnetic post 71, between the first common magnetic post 32 and the fourth coupling magnetic post 71, and between the fourth coupling magnetic post 71 and the fifth coupling magnetic post 72 multiple times. In this embodiment, the second intermediate portion 422 of the second winding 42 passes through the following twice: between the first coupling magnetic post 34 and the second coupling magnetic post 35; between the first common magnetic post 32 and the second coupling magnetic post 35; between the second coupling magnetic post 35 and the third coupling magnetic post 36; between the third coupling magnetic post 36 and the second common magnetic post 33; between the third coupling magnetic post 36 and the fourth coupling magnetic post 71; between the first common magnetic post 32 and the fourth coupling magnetic post 71; and between the fourth coupling magnetic post 71 and the fifth coupling magnetic post 72. The second output portion 423 of the second winding 42 passes through the second common magnetic post 33 and the fifth coupling magnetic post 72.

[0113] Furthermore, in this embodiment, the first winding 41 includes at least one first connecting portion 414, for example... Figure 12 A first connecting portion 414 is shown, which passes through the space between the first common magnetic post 32 and the first coupling magnetic post 34, the third side 31c of the magnetic core assembly 3, the first side 31a of the magnetic core assembly 3, the fourth side 31d of the magnetic core assembly 3, and the space between the first common magnetic post 32 and the fifth coupling magnetic post 72. The first connecting portion 414 is also connected between the two first intermediate portions 412 of the first winding 41, which are connected end-to-end. The second winding 42 includes at least one second connecting portion 424, for example... Figure 12 A second connecting portion 424 is shown, which passes through the second common magnetic post 33 and the first coupling magnetic post 34, the third side 31c of the magnetic core assembly 3, the second side 31b of the magnetic core assembly 3, the fourth side 31d of the magnetic core assembly 3, and the second common magnetic post 33 and the fifth coupling magnetic post 72. The second connecting portion 424 is connected between the two second intermediate portions 422 that are connected end to end in the second winding 42. Figure 12The coupling inductance of each winding equal to 2 turns is realized, and similar method can also be used to realize the coupling inductance of each winding greater than 2 turns; compared with the coupling inductance of each winding single turn Figure 3 , the coupling inductance of each winding greater than or equal to 2 turns obtains the increase of turns of each winding, thereby obtaining the benefit of the increase of inductance of each winding, or the benefit of the increase of saturation current of each winding, or the benefit of the decrease of core loss.

[0114] According to the above-mentioned three embodiments Figure 3 , Figure 10 and Figure 12 , the rule of the first winding 41 and the second winding 42 penetrating between the plurality of coupling magnetic columns of the magnetic core assembly 3 can be summarized as follows. The first winding 41 penetrates between each coupling magnetic column and the adjacent coupling magnetic column, between the even-numbered coupling magnetic column and the second common magnetic column 33, and between the odd-numbered coupling magnetic column and the first common magnetic column 32, and the second winding 42 penetrates between each coupling magnetic column and the adjacent coupling magnetic column, between the even-numbered coupling magnetic column and the first common magnetic column 32, and between the odd-numbered coupling magnetic column and the second common magnetic column 33. When the number of coupling magnetic columns is odd, the first output portion 413 of the first winding 41 penetrates between the last coupling magnetic column and the first common magnetic column 32, and the second output portion 423 of the second winding 42 penetrates between the last coupling magnetic column and the second common magnetic column 33, and when the number of coupling magnetic columns is even, the first output portion 413 of the first winding 41 penetrates between the last coupling magnetic column and the second common magnetic column 33, and the second output portion 423 of the second winding 42 penetrates between the last coupling magnetic column and the first common magnetic column 32. According to the above-mentioned rule, the number of mutual superposition between the first winding 41 and the second winding 42 is the number of coupling magnetic columns minus one.

[0115] Please refer to Figure 13 and Figure 14 , wherein Figure 13 is a structural schematic diagram of a power conversion module of a magnetic assembly with a primary winding according to the sixth embodiment of the present disclosure, Figure 14 is a key position voltage signal waveform diagram of the power conversion module shown in Figure 13 . As shown in the figure, compared with the coupling inductance of the magnetic assembly 2 shown in Figure 2 , the magnetic assembly 2e of the present embodiment is used to constitute a coupling transformer, and includes a primary winding 81, a first secondary winding 82, a second secondary winding 83, a first rectifier device MA, a second rectifier device MB, and an output capacitor Co. In Figure 13 , in order to facilitate the display of the structural features of the primary winding 81, the first secondary winding 82, and the second secondary winding 83, Figure 13Only the second magnetic cover 38 of the magnetic core assembly 3 is shown, and the first magnetic cover of the magnetic core assembly 3 is not shown. The primary winding 81, the first secondary winding 82 and the second secondary winding 83 are sequentially overlapped between the first magnetic cover and the second magnetic cover 38.

[0116] One end of the primary winding 81 is connected to one end of the external alternating voltage 9, and the other end of the primary winding 81 is connected to the other end of the external alternating voltage 9. Since the external alternating voltage 9 provides an alternating pulse voltage UAB, the two ends of the primary winding 81 have the alternating pulse voltage UAB therebetween, wherein the alternating pulse voltage UAB is a three-level or two-level alternating pulse voltage, and the operating mode of the alternating pulse voltage UAB provided by the external alternating voltage 9 will be described later. As shown in Figure 13 The primary winding 81 is sequentially threaded between the first coupling magnetic column 34 and the second common magnetic column 33, between the first coupling magnetic column 34 and the second coupling magnetic column 35, between the second coupling magnetic column 35 and the first common magnetic column 32, between the second coupling magnetic column 35 and the third coupling magnetic column 36, between the third coupling magnetic column 36 and the second common magnetic column 33, the fourth side 31d of the magnetic core assembly 3 (i.e. the side of the third coupling magnetic column 36 away from the second coupling magnetic column 35), between the third coupling magnetic column 36 and the first common magnetic column 32, between the second coupling magnetic column 35 and the third coupling magnetic column 36, between the second coupling magnetic column 35 and the second common magnetic column 33, between the first coupling magnetic column 34 and the second coupling magnetic column 35, and between the first coupling magnetic column 34 and the first common magnetic column 32.

[0117] The input end of the first secondary winding 82 is connected to the first rectifier device MA, and the output end of the first secondary winding 82 is connected to the positive output end Vout+ of the output capacitor Co. The input end of the second secondary winding 83 is connected to the second rectifier device MB, and the output end of the second secondary winding 83 is connected to the positive output end Vout+ of the output capacitor Co. The winding manner of the first secondary winding 82 and the second secondary winding 83 on the magnetic core assembly 3 is similar to the winding manner of the first winding 41 and the second winding 42 on the magnetic core assembly 3 of Figure 4 Therefore, it will not be described here.

[0118] The first rectifier device MA and the second rectifier device MB can be composed of a metal oxide semiconductor field effect transistor (MOSFET), a diode, a gallium nitride field effect transistor (GaN FET), or an insulated gate bipolar transistor (IGBT). Figure 13Taking a metal-oxide-semiconductor field-effect transistor (MOSFET) as an example. The drain of the first rectifier MA is connected to the input terminal of the first secondary winding 82, and the source of the first rectifier MA is connected to the negative output terminal Vout- of the output capacitor Co. In some embodiments, the first rectifier MA is composed of a diode, in which case the cathode of the first rectifier MA is connected to the input terminal of the first secondary winding 82, and the anode of the first rectifier MA is connected to the negative output terminal Vout- of the output capacitor Co. The drain of the second rectifier MB is connected to the input terminal of the second secondary winding 83, and the source of the second rectifier MB is connected to both the source of the first rectifier MA and the negative output terminal Vout- of the output capacitor Co. In some embodiments, the second rectifier MB is composed of a diode, in which case the cathode of the second rectifier MB is connected to the input terminal of the second secondary winding 83, and the anode of the second rectifier MB is connected to the negative output terminal Vout- of the output capacitor Co.

[0119] And such Figure 14 As shown, the AC pulse voltage UAB provided by the external alternating voltage 9 is a three-level voltage. When the AC pulse voltage UAB is positive, the first rectifier MA receives the turn-on signal and is in the on state, and the second rectifier MB receives the turn-off signal and is in the off state; when the AC pulse voltage UAB is zero, the first rectifier MA receives the turn-on signal and is in the on state, and the second rectifier MB receives the turn-on signal and is in the on state; when the AC pulse voltage UAB is negative, the first rectifier MA receives the turn-off signal and is in the off state, and the second rectifier MB receives the turn-on signal and is in the on state. According to the above control method, the DC current of the first secondary winding 82 flows from the input terminal to the output terminal of the first secondary winding 82, and the DC current of the second secondary winding 83 also flows from the input terminal to the output terminal of the second secondary winding 83. Compared to Figure 3 The winding-coupled inductor, a magnetic component consisting of the primary winding 81, the first secondary winding 82, and the second secondary winding 83, can also be called a coupled transformer. Compared to a coupled inductor, this coupled transformer not only offers advantages such as lower secondary winding ripple current and lower column loss, but also, due to the presence of the primary winding, provides benefits such as increased duty cycle, further reduction in the secondary winding volt-second product, lower core loss, lower RMS current, and lower conduction loss, all while maintaining the same output voltage to input voltage gain.

[0120] Of course, in other embodiments, the magnetic component may also include a greater number of coupling magnetic pillars to form a coupling transformer, which will not be elaborated here.

[0121] In summary, the first intermediate portion of the first winding and the second intermediate portion of the second winding of the magnetic assembly of the present disclosure are both arranged between the first coupling magnetic column and the second coupling magnetic column, and the first intermediate portion of the first winding and the second intermediate portion of the second winding are both arranged between the second coupling magnetic column and the third coupling magnetic column. Therefore, it can be known that the first winding and the second winding have two overlapping portions (or crossing portions) so that the first winding and the second winding have two crossings. Therefore, the magnetic assembly of the present disclosure has the advantages of thin magnetic cover thickness, low magnetic core loss of the magnetic assembly, and low thermal conduction resistance of the magnetic assembly.

Claims

1. A magnetic assembly with winding coupling, comprising: a first common magnetic pole; a second common magnetic pole, disposed opposite to the first common magnetic pole; a first coupling magnetic pole, a second coupling magnetic pole and a third coupling magnetic pole, disposed in sequence and in interval, and located between the first common magnetic pole and the second common magnetic pole, wherein the second coupling magnetic pole is located between the first coupling magnetic pole and the third coupling magnetic pole; a first winding, comprising a first input portion, a first intermediate portion and a first output portion connected in sequence, the first input portion is disposed between the first common magnetic pole and the first coupling magnetic pole, the first intermediate portion is disposed between the first coupling magnetic pole and the second coupling magnetic pole, between the second common magnetic pole and the second coupling magnetic pole, and between the second coupling magnetic pole and the third coupling magnetic pole, and the first output portion is disposed between the first common magnetic pole and the third coupling magnetic pole; and a second winding, comprising a second input portion, a second intermediate portion and a second output portion connected in sequence, the second input portion is disposed between the second common magnetic pole and the first coupling magnetic pole, the second intermediate portion is disposed between the first coupling magnetic pole and the second coupling magnetic pole, between the first common magnetic pole and the second coupling magnetic pole, and between the second coupling magnetic pole and the third coupling magnetic pole, and the second output portion is disposed between the second common magnetic pole and the third coupling magnetic pole.

2. The magnetic assembly of claim 1, wherein the magnetic reluctance of the first common magnetic pole and the magnetic reluctance of the second common magnetic pole are respectively greater than three times the magnetic reluctance of the first coupling magnetic pole, three times the magnetic reluctance of the second coupling magnetic pole, or three times the magnetic reluctance of the third coupling magnetic pole.

3. The magnetic assembly of claim 1, wherein the magnetic reluctance of the first common magnetic pole and the magnetic reluctance of the second common magnetic pole are respectively greater than five times the magnetic reluctance of the first coupling magnetic pole, five times the magnetic reluctance of the second coupling magnetic pole, or five times the magnetic reluctance of the third coupling magnetic pole.

4. The magnetic assembly of claim 1, wherein the first coupling magnetic pole, the second coupling magnetic pole and the third coupling magnetic pole all do not have air gaps.

5. The magnetic assembly of claim 1, wherein the first common magnetic pole has a first common pole air gap, the second common magnetic pole has a second common pole air gap, the first coupling magnetic pole has a first coupling pole air gap, the second coupling magnetic pole has a second coupling pole air gap, the third coupling magnetic pole has a third coupling pole air gap, and the length of the first common pole air gap and the length of the second common pole air gap are respectively greater than the length of the first coupling pole air gap, the length of the second coupling pole air gap and the length of the third coupling pole air gap.

6. The magnetic assembly of claim 1, further comprising a first magnetic cover and a second magnetic cover, the first magnetic cover and the second magnetic cover are disposed opposite to each other, wherein the first magnetic cover has a surface and a bottom surface opposite to each other, the second magnetic cover has a surface and a bottom surface opposite to each other, the first common magnetic pole, the second common magnetic pole, the first coupling magnetic pole, the second coupling magnetic pole and the third coupling magnetic pole are all located between the bottom surface of the first magnetic cover and the bottom surface of the second magnetic cover.

7. The magnetic assembly of claim 6, wherein the first common magnetic pole has a first common pole air gap, the first common pole air gap is between the first common magnetic pole and the first magnetic cover, and / or the first common pole air gap is between the first common magnetic pole and the second magnetic cover, and / or the first common pole air gap is in the middle of the first common magnetic pole; the second common magnetic pole has a second common pole air gap, the second common pole air gap is between the second common magnetic pole and the first magnetic cover, and / or the second common pole air gap is between the second common magnetic pole and the second magnetic cover, and / or the second common pole air gap is in the middle of the second common magnetic pole; the first coupling magnetic pole has a first coupling pole air gap, the first coupling pole air gap is between the first coupling magnetic pole and the first magnetic cover, and / or the first coupling pole air gap is between the first coupling magnetic pole and the second magnetic cover, and / or the first coupling pole air gap is in the middle of the first coupling magnetic pole; the second coupling magnetic pole has a second coupling pole air gap, the second coupling pole air gap is between the second coupling magnetic pole and the first magnetic cover, and / or the second coupling pole air gap is between the second coupling magnetic pole and the second magnetic cover, and / or the second coupling pole air gap is in the middle of the second coupling magnetic pole; and the third coupling magnetic pole has a third coupling pole air gap, the third coupling pole air gap is between the third coupling magnetic pole and the first magnetic cover, and / or the third coupling pole air gap is between the third coupling magnetic pole and the second magnetic cover, and / or the third coupling pole air gap is in the middle of the third coupling magnetic pole.

8. The magnetic assembly of claim 6, wherein the magnetic assembly comprises a body, the body comprises a first surface, a second surface, a plurality of sidewall surfaces, and a conductive layer, the first surface and the second surface are oppositely disposed, the plurality of sidewall surfaces are between the first surface and the second surface, the first surface of the body is adjacent to the first magnetic cover, the second surface of the body is adjacent to the second magnetic cover, the first common magnetic pole, the second common magnetic pole, the first coupling magnetic pole, the second coupling magnetic pole, and the third coupling magnetic pole are disposed in the body and between the plurality of sidewall surfaces, the conductive layer is embedded in the body, and the conductive layer is connected to the first winding and the second winding.

9. The magnetic assembly of claim 8, wherein a distance between the first surface and the second surface of the body is greater than a distance between the surface of the first magnetic cover and the surface of the second magnetic cover.

10. The magnetic assembly of claim 8, wherein the magnetic assembly comprises a plurality of terminals, at least two of the terminals are connected to the first input of the first winding and the second input of the second winding, respectively, for input of current; and at least one of the terminals is connected to the first output of the first winding and the second output of the second winding, for output of current. ​ ​ ​ ​ ​ 11. The magnetic assembly of claim 8, wherein the magnetic assembly comprises a plurality of terminals, at least two of the terminals are connected to the first input of the first winding and the second input of the second winding, respectively, for input of current; and at least two of the terminals are connected to the first output of the first winding and the second output of the second winding, respectively, for output of current.

12. The magnetic assembly of claim 10 or 11, wherein the terminals for input of current are disposed on the first surface of the body or on the plurality of sidewall surfaces of the body, and the terminals for output of current are disposed on the second surface of the body or on the plurality of sidewall surfaces of the body.

13. The magnetic assembly of claim 10 or 11, wherein the terminals are all disposed on the first surface of the body, or all disposed on the plurality of sidewall surfaces of the body, or all disposed on the second surface of the body.

14. The magnetic assembly of claim 6, wherein the material constituting the first coupling magnetic column, the material constituting the second coupling magnetic column, and the material constituting the third coupling magnetic column are different from the material constituting the first common magnetic column and the material constituting the second common magnetic column.

15. The magnetic assembly of claim 14, wherein the material constituting the first coupling magnetic column, the material constituting the second coupling magnetic column, and the material constituting the third coupling magnetic column are high permeability materials, and the material constituting the first common magnetic column and the material constituting the second common magnetic column are low permeability materials.

16. The magnetic assembly of claim 14, wherein the material constituting the first coupling magnetic column, the material constituting the second coupling magnetic column, and the material constituting the third coupling magnetic column are ferrite materials, and the material constituting the first common magnetic column and the material constituting the second common magnetic column are iron powder materials, wherein the first coupling magnetic column and the third coupling magnetic column form a closed loop with a first magnetic cover and a second magnetic cover, and the closed loop is constituted by high permeability materials at the positions of the first magnetic cover and the second magnetic cover.

17. The magnetic assembly of claim 1, wherein direct current of the first winding flows through the first input, the first intermediate portion, and the first output in sequence, and direct current of the second winding flows through the second input, the second intermediate portion, and the second output in sequence.

18. The magnetic assembly of claim 1, wherein the first output of the first winding and the second output of the second winding are connected, and the connection of the first output and the second output is adjacent to a side of the third coupling magnetic column that is distal from the first coupling magnetic column.

19. The magnetic assembly of claim 1, wherein a first alternating voltage is applied between the first input and the first output of the first winding, and a second alternating voltage is applied between the second input and the second output of the second winding, wherein the voltage signals of the first alternating voltage and the second alternating voltage are out of phase by 150-210 degrees at the same time.

20. The magnetic component of claim 1, wherein the sum of the cross-sectional areas of the first common magnetic post and the second common magnetic post is greater than the sum of the cross-sectional areas of the first coupling magnetic post, the second coupling magnetic post, and the third coupling magnetic post.

21. The magnetic component of claim 1, wherein the sum of the cross-sectional areas of the first common magnetic post and the second common magnetic post is less than or equal to the sum of the cross-sectional areas of the first coupling magnetic post, the second coupling magnetic post, and the third coupling magnetic post.

22. The magnetic component of claim 1, wherein the cross-sectional area of ​​the first common magnetic post is approximately equal to the cross-sectional area of ​​the second common magnetic post, the cross-sectional area of ​​the first coupling magnetic post is approximately equal to the cross-sectional area of ​​the third coupling magnetic post, and the cross-sectional area of ​​the second coupling magnetic post is approximately equal to the sum of the cross-sectional areas of the first coupling magnetic post and the third coupling magnetic post.

23. The magnetic component of claim 1, wherein the first winding and the second winding are each composed of two copper strips, or the first winding and the second winding are composed of copper foil or copper strips in a printed circuit board, wherein the magnetic component further includes an insulating medium to isolate the first winding and the second winding.

24. The magnetic component as claimed in claim 1, wherein the first common magnetic post and the second common magnetic post are arranged in a mirror image of each other, and the first coupling magnetic post, the second coupling magnetic post, the third coupling magnetic post, the first winding, and the second winding are all mirror symmetrical.

25. The magnetic component of claim 1, wherein the number of the first intermediate portions of the first winding is plurality of multiple, and the current of the first winding flows multiple times between the first coupling post and the second coupling post, between the second common post and the second coupling post, and between the second coupling post and the third coupling post; and The second winding has multiple second intermediate portions, and the current of the second winding flows between the first coupling magnetic post and the second coupling magnetic post, between the first common magnetic post and the second coupling magnetic post, and between the second coupling magnetic post and the third coupling magnetic post multiple times.

26. The magnetic assembly of claim 25, wherein the first winding further comprises at least one first connecting portion, the first connecting portion partially surrounding the first common magnetic post and connecting between two first intermediate portions joined end-to-end; and The second winding also includes at least one second connection portion that partially surrounds the second common magnetic post and connects between two second intermediate portions that are connected end to end.

27. The magnetic component of claim 1, wherein the first common magnetic pillar comprises a plurality of first common sub-magnetic pillars, the plurality of first common sub-magnetic pillars being spaced apart, and the second common magnetic pillar comprises a plurality of second common sub-magnetic pillars, the plurality of second common sub-magnetic pillars being spaced apart.

28. The magnetic assembly of claim 1, wherein the magnetic assembly comprises a primary winding disposed between the first common magnetic pole and the first coupling magnetic pole, between the first coupling magnetic pole and the second coupling magnetic pole, between the second coupling magnetic pole and the second common magnetic pole, between the second coupling magnetic pole and the third coupling magnetic pole, between the third coupling magnetic pole and the first common magnetic pole, on a side of the third coupling magnetic pole away from the second coupling magnetic pole, between the third coupling magnetic pole and the second common magnetic pole, between the second coupling magnetic pole and the third coupling magnetic pole, between the second coupling magnetic pole and the first common magnetic pole, between the first coupling magnetic pole and the second coupling magnetic pole, and between the second common magnetic pole and the first coupling magnetic pole, wherein the primary winding comprises at least one turn around the second coupling magnetic pole.

29. A winding-coupled magnetic assembly, comprising: a first magnetic cover having a surface; a second magnetic cover having a surface; a first common magnetic pole disposed between the first magnetic cover and the second magnetic cover; a second common magnetic pole disposed opposite the first common magnetic pole and between the first magnetic cover and the second magnetic cover; N coupling magnetic poles disposed in sequence and spaced apart between the first common magnetic pole and the second common magnetic pole and between the first magnetic cover and the second magnetic cover, wherein N is an integer greater than or equal to 3; a first winding disposed between each coupling magnetic pole and an adjacent coupling magnetic pole, between even-numbered ones of the N coupling magnetic poles and the second common magnetic pole, and between odd-numbered ones of the N coupling magnetic poles and the first common magnetic pole, the first winding comprising a first input portion disposed between the first common magnetic pole and a first one of the N coupling magnetic poles, a first intermediate portion connected between the first input portion and a first output portion, wherein when N is odd, the first output portion is disposed between an Nth one of the N coupling magnetic poles and the first common magnetic pole, and when N is even, the first output portion is disposed between the Nth one of the N coupling magnetic poles and the second common magnetic pole; and a second winding disposed between each coupling magnetic pole and an adjacent coupling magnetic pole, between the odd-numbered ones of the N coupling magnetic poles and the second common magnetic pole, and between the even-numbered ones of the N coupling magnetic poles and the first common magnetic pole, the second winding comprising a second input portion disposed between the second common magnetic pole and the first one of the N coupling magnetic poles, a second intermediate portion connected between the second input portion and a second output portion, wherein when N is odd, the second output portion is disposed between the Nth one of the N coupling magnetic poles and the second common magnetic pole, and when N is even, the second output portion is disposed between the Nth one of the N coupling magnetic poles and the first common magnetic pole.

30. The magnetic assembly of claim 29, wherein the reluctance of the first common magnetic pole and the reluctance of the second common magnetic pole are each greater than three times the reluctance of each coupling magnetic pole.

31. The magnetic assembly of claim 29, wherein the reluctance of the first common magnetic pole and the reluctance of the second common magnetic pole are each greater than five times the reluctance of each coupling magnetic pole.

32. The magnetic assembly of claim 29, wherein each coupling magnetic pole does not have an air gap.

33. The magnetic assembly of claim 29, wherein the first common magnetic pole has a first common pole air gap, the second common magnetic pole has a second common pole air gap, and each coupling magnetic pole has a coupling pole air gap, the length of the first common pole air gap and the length of the second common pole air gap are each greater than the length of the coupling pole air gap of each coupling magnetic pole.

34. The magnetic assembly of claim 33, wherein the first common pole air gap is located between the first common magnetic pole and the first magnetic cap, and / or the first common pole air gap is located between the first common magnetic pole and the second magnetic cap, and / or the first common pole air gap is located at a middle location of the first common magnetic pole; the second common pole air gap is located between the second common magnetic pole and the first magnetic cap, and / or the second common pole air gap is located between the second common magnetic pole and the second magnetic cap, and / or the second common pole air gap is located at a middle location of the second common magnetic pole; and the coupling pole air gap of each coupling magnetic pole is located between the corresponding coupling magnetic pole and the first magnetic cap, and / or the coupling pole air gap of each coupling magnetic pole is located between the corresponding coupling magnetic pole and the second magnetic cap, and / or the coupling pole air gap of each coupling magnetic pole is located at a middle location of the corresponding coupling magnetic pole.

35. The magnetic assembly of claim 29, wherein the magnetic assembly comprises a body comprising a first surface, a second surface, a plurality of sidewall surfaces, and a conductive layer, the first surface and the second surface are oppositely disposed, the plurality of sidewall surfaces are located between the first surface and the second surface, the first surface of the body is adjacent to the first magnetic cap, the second surface of the body is adjacent to the second magnetic cap, the first common magnetic pole, the second common magnetic pole, and the N coupling magnetic poles are disposed within the body and between the plurality of sidewall surfaces, and the conductive layer is embedded within the body and connected to the first winding and the second winding.

36. The magnetic assembly of claim 35, wherein the distance between the first surface and the second surface of the body is greater than the distance between the surface of the first magnetic cap and the surface of the second magnetic cap.

37. The magnetic assembly of claim 35, wherein the magnetic assembly comprises a plurality of terminals, at least two of the terminals are connected to the first input of the first winding and the second input of the second winding, respectively, for input of current; and at least one of the terminals is connected to the first output of the first winding and the second output of the second winding, respectively, for output of current. ​ 38. The magnetic assembly of claim 35, wherein the magnetic assembly comprises a plurality of terminals, at least two of the terminals are connected to the first input of the first winding and the second input of the second winding, respectively, for input of current; and at least two of the terminals are connected to the first output of the first winding and the second output of the second winding, respectively, for output of current.

39. The magnetic assembly of claim 37 or 38, wherein the terminals for input of current are disposed on the first surface of the body or on the plurality of sidewall surfaces of the body; and the terminals for output of current are disposed on the second surface of the body or on the plurality of sidewall surfaces of the body.

40. The magnetic assembly of claim 37 or 38, wherein the terminals are all disposed on the first surface of the body, or all disposed on the plurality of sidewall surfaces of the body, or all disposed on the second surface of the body.

41. The magnetic assembly of claim 29, wherein the material constituting each of the coupling magnetic columns is different from the material constituting the first common magnetic column and the material constituting the second common magnetic column.

42. The magnetic assembly of claim 41, wherein the material constituting each of the coupling magnetic columns is a high permeability material, and the material constituting the first common magnetic column and the material constituting the second common magnetic column are low permeability materials.

43. The magnetic assembly of claim 41, wherein the material constituting each of the coupling magnetic columns is a ferrite material, and the material constituting the first common magnetic column and the material constituting the second common magnetic column are iron powder materials, wherein the first coupling magnetic column and the Nth coupling magnetic column are configured with a first magnetic cover and a second magnetic cover to form a closed loop, the closed loop being formed by high permeability materials at the locations of the first magnetic cover and the second magnetic cover.

44. The magnetic assembly of claim 29, wherein a direct current of the first winding flows through the first input, the first intermediate portion, and the first output in sequence, and a direct current of the second winding flows through the second input, the second intermediate portion, and the second output in sequence.

45. The magnetic assembly of claim 29, wherein the first output of the first winding and the second output of the second winding are connected, and the connection of the first output and the second output is adjacent to a side of the Nth coupling magnetic column that is distal to the first coupling magnetic column.

46. The magnetic assembly of claim 29, wherein a first alternating current voltage is applied between the first input and the first output of the first winding, and a second alternating current voltage is applied between the second input and the second output of the second winding, wherein the voltage signals of the first alternating current voltage and the second alternating current voltage are out of phase by 150-210 degrees at the same time.

47. The magnetic assembly of claim 29, wherein the sum of the cross-sectional areas of the first common magnetic column and the second common magnetic column is greater than the sum of the cross-sectional areas of the N coupling magnetic columns.

48. The magnetic assembly of claim 29, wherein a sum of cross-sectional areas of the first common magnetic post and the second common magnetic post is less than or equal to a sum of cross-sectional areas of the N coupled magnetic posts.

49. The magnetic assembly of claim 29, wherein a cross-sectional area of the first common magnetic post is approximately equal to a cross-sectional area of the second common magnetic post, and a cross-sectional area of the first coupled magnetic post is approximately equal to a cross-sectional area of the Nth coupled magnetic post.

50. The magnetic assembly of claim 29, wherein the first winding and the second winding are each formed by two copper bars, or the first winding and the second winding are formed by copper sheets or copper bars in a printed circuit board, and the magnetic assembly further comprises an insulating medium to isolate the first winding and the second winding.

51. The magnetic assembly of claim 29, wherein the first common magnetic post and the second common magnetic post are mirror images of each other, and the first coupled magnetic post, the second coupled magnetic post, the third coupled magnetic post, the first winding, and the second winding are mirror images of each other.

52. The magnetic assembly of claim 29, wherein a number of the first intermediate portions of the first winding is a plurality, and a number of times that a current of the first winding flows through each coupled magnetic post and an adjacent coupled magnetic post is a plurality; and a number of the second intermediate portions of the second winding is a plurality, and a number of times that a current of the second winding flows through each coupled magnetic post and an adjacent coupled magnetic post is a plurality.

53. The magnetic assembly of claim 52, wherein the first winding further comprises at least one first connecting portion that partially surrounds the first common magnetic post and connects between two first intermediate portions that are connected end to end; and the second winding further comprises at least one second connecting portion that partially surrounds the second common magnetic post and connects between two second intermediate portions that are connected end to end.

54. The magnetic assembly of claim 29, wherein the first common magnetic post comprises a plurality of first common sub-magnetic posts that are spaced apart, and the second common magnetic post comprises a plurality of second common sub-magnetic posts that are spaced apart.

55. The magnetic assembly of claim 29, wherein the magnetic assembly comprises a primary winding that is threaded through each coupled magnetic post and an adjacent coupled magnetic post, each coupled magnetic post and the first common magnetic post, and each coupled magnetic post and the second common magnetic post, and a number of turns of the primary winding around a second coupled magnetic post to an N-1th coupled magnetic post of the N coupled magnetic posts is at least one turn.

56. A power conversion module, comprising: at least one magnetic assembly of claim 1 or 29 having a winding coupled; and at least two half-bridge legs, a midpoint of each half-bridge leg being connected to a first input of the first winding and a second input of the second winding, respectively.

57. The power conversion module of claim 56, wherein the at least two half-bridge legs are located on a side of the first coupled magnetic post that is distal from the third coupled magnetic post. ​ ​ ​ ​ 58. The power conversion module of claim 56, wherein projections of the at least two first half-bridge legs onto a first virtual plane in a first direction partially overlap with projections of the first winding onto the first virtual plane in the first direction, and projections of the at least two first half-bridge legs onto the first virtual plane in the first direction partially overlap with projections of the second winding onto the first virtual plane in the first direction; or projections of the at least two first half-bridge legs onto a second virtual plane in a second direction partially overlap with projections of the first winding onto the second virtual plane in the second direction, and projections of the at least two first half-bridge legs onto the second virtual plane in the second direction partially overlap with projections of the second winding onto the second virtual plane in the second direction.

59. The power conversion module of claim 56, wherein the power conversion module comprises an output capacitor, one end of the output capacitor is connected to a first output of the first winding and a second output of the second winding, and another end of the output capacitor is connected to ground terminals of the at least two half-bridge legs.

60. The power conversion module of claim 56, wherein the output positive terminal is located on a side of the third coupling magnetic post away from the first coupling magnetic post.

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