Power conversion module

Abstract

The present disclosure relates to a power conversion module, comprising: a high-voltage side including a high-voltage positive electrode and a high-voltage negative electrode; a low-voltage side including a low-voltage positive electrode and a low-voltage negative electrode, wherein the low-voltage negative electrode is electrically connected to the high-voltage negative electrode; a magnetic component including two first windings; a high-voltage side circuit electrically connected to the high-voltage positive electrode and the high-voltage negative electrode and electrically connected to the two first windings of the magnetic component; and a low-voltage side circuit electrically connected to the low-voltage positive electrode and the low-voltage negative electrode and electrically connected to the two first windings of the magnetic component; wherein the power conversion module includes at least one alternating current, the alternating current flows through one of the first windings of the magnetic component, and flows through the high-voltage side circuit and the low-voltage side circuit, and the high-voltage side circuit and the low-voltage side circuit are disposed on the same side of the magnetic component.

Description

Technical Field

[0001] The present disclosure relates to a power conversion module, and particularly to a power conversion module that can shorten the path of an alternating current loop, thereby reducing the alternating current loss. Background Art

[0002] With the improvement of technologies such as the Internet, cloud computing, electric vehicles, and industrial automation, the power consumption is increasing, so the demand for power sources is also increasing, which makes the power conversion module have to develop in the direction of high power density and high efficiency. Among them, how to reduce the power loss of the power conversion module is one of the key points of research and development.

[0003] The power conversion module usually includes a magnetic component, which can be a transformer or a coupled inductor. The power conversion module can also be an isolated power conversion module or a non-isolated power conversion module. The magnetic component divides the circuit components in the power conversion module into a high-voltage side circuit group and a low-voltage side circuit group. The high-voltage side circuit group will include at least one alternating current loop formed by the circuit elements of the high-voltage side circuit group, and the low-voltage side circuit group will include at least one alternating current loop formed by the circuit elements of the low-voltage side circuit group. In the layout of the isolated power conversion module, the traditional method is that the high-voltage side circuit group and the low-voltage side circuit group are usually distributed on opposite sides of the magnetic component, that is, the high-voltage side circuit group and the low-voltage side circuit group are located on two opposite sides of the magnetic component. In this way, there will be no influence between the alternating current loops of the high-voltage side circuit group and the alternating current loops of the low-voltage side circuit group, and the paths of the alternating current loops of the high-voltage side circuit group and the alternating current loops of the low-voltage side circuit group are the shortest, which is beneficial to reducing the parasitic inductance on the alternating current loop and improving the efficiency of the power conversion module.

[0004] However, for a non-isolated power conversion module, although the magnetic component of the non-isolated power conversion module can also divide the circuit elements in the power conversion module into a high-voltage side circuit group and a low-voltage side circuit group, since there are multiple alternating current loops in the non-isolated power conversion module, and each alternating current loop is actually composed of at least some circuit elements of the high-voltage side circuit group and at least some circuit elements of the low-voltage side circuit group, that is, each alternating current loop flows through the high-voltage side circuit group and the low-voltage side circuit group. Therefore, if the layout method of the aforementioned isolated power conversion module is adopted, that is, the magnetic component is set in the middle of the whole non-isolated power conversion module, and the high-voltage side circuit group and the low-voltage side circuit group are respectively set on opposite sides of the magnetic component, then the multiple alternating current loops of the non-isolated power conversion module will straddle both sides of the magnetic component, resulting in too long paths of the multiple alternating current loops, and increasing the alternating current loss of the non-isolated power conversion module.

[0005] Therefore, how to develop a power conversion module that overcomes the above-mentioned drawbacks is an urgent need at present. Summary of the Invention

[0006] The purpose of the present disclosure is to provide a power conversion module that can shorten the path of the alternating current loop, thereby reducing the alternating current loss.

[0007] To achieve the above object, a broader embodiment of the present disclosure provides a power conversion module, comprising: a high-voltage side, including a high-voltage positive electrode and a high-voltage negative electrode; a low-voltage side, including a low-voltage positive electrode and a low-voltage negative electrode, wherein the low-voltage negative electrode is electrically connected to the high-voltage negative electrode; a magnetic component, including two first windings; a high-voltage side circuit, electrically connected to the high-voltage positive electrode and the high-voltage negative electrode, and electrically connected to the two first windings of the magnetic component; and a low-voltage side circuit, electrically connected to the low-voltage positive electrode and the low-voltage negative electrode, and electrically connected to the two first windings of the magnetic component; wherein the power conversion module includes at least one alternating current, the alternating current flows through one of the first windings of the magnetic component, and flows through the high-voltage side circuit and the low-voltage side circuit, and the high-voltage side circuit and the low-voltage side circuit are disposed on the same side of the magnetic component. Brief Description of the Drawings

[0008] Figure 1 Schematic diagram of the circuit layout of the power conversion module according to the first preferred embodiment of the present disclosure;

[0009] Figure 2A For Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the first embodiment constituted by the power conversion module shown;

[0010] Figure 2B For Figure 2A Operating timing diagram of the switch in the power conversion circuit shown;

[0011] Figure 2C For Figure 2A Schematic diagram of the alternating current loop generated by the power conversion circuit shown at the time t0 - t1 shown; Figure 2B shown

[0012] Figure 3 Schematic diagram of the circuit layout of the power conversion module according to the second preferred embodiment of the present disclosure;

[0013] Figure 4A Schematic diagram of the circuit layout of the power conversion module according to the third preferred embodiment of the present disclosure, showing one of the first windings;

[0014] Figure 4B Schematic diagram of the circuit layout of the power conversion module according to the third preferred embodiment of the present disclosure, showing the other first winding;

[0015] Figure 5Schematic diagram of the circuit layout of the power conversion module according to the fourth preferred embodiment of the present disclosure;

[0016] Figure 6 Schematic diagram of the circuit layout of the power conversion module according to the fifth preferred embodiment of the present disclosure;

[0017] Figure 7 Is Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the second embodiment constituted by the power conversion module shown;

[0018] Figure 8 Is Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the third embodiment constituted by the power conversion module shown;

[0019] Figure 9 Is Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the fourth embodiment constituted by the power conversion module shown;

[0020] Figure 10 Is Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the fifth embodiment constituted by the power conversion module shown;

[0021] Figure 11 Is Figure 1 Schematic diagram of the circuit structure of the power conversion circuit of the sixth embodiment constituted by the power conversion module shown.

[0022] The description of the reference numerals is as follows:

[0023] 1: Power conversion module

[0024] 1A, 1B, 1C, 1D: Power conversion circuit

[0025] 10, 20: High-voltage side circuit

[0026] 11, 21: Low-voltage side circuit

[0027] 12, 22: Magnetic component

[0028] 13: High-voltage side and low-voltage side circuit placement area

[0029] Vin: Input voltage <�

[0030] Vo: Output voltage

[0031] C1: High-voltage side capacitor

[0032] C2: Low-voltage side capacitor

[0033] V1+: High-voltage positive electrode

[0034] V1-: High-voltage negative electrode It should be noted that there is a misspelling in the original text where "<�

[0030] " should probably be "

[0030] ". This has been maintained as it is in the translation.

[0035] V2+: Low-voltage positive electrode

[0036] V2-: Low-voltage negative electrode

[0037] t1~t4: Time

[0038] S1A, S1a: First switch

[0039] S2B, S1b: Second switch

[0040] S2C, S2c: Third switch

[0041] S2A, S1c: Fourth switch

[0042] S1B: Fifth switch

[0043] S1C: Sixth switch

[0044] Cr1: First flying capacitor

[0045] Cr2: Second flying capacitor

[0046] T21, T22: First winding

[0047] T23, T24: Second winding Detailed implementation manners

[0048] Some typical 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 have various changes in different embodiments, all of which do not depart from the scope of the present disclosure, and the descriptions and illustrations therein are for illustrative purposes in nature, rather than being construed to limit the present disclosure.

[0049] Figure 1 It is a circuit layout schematic diagram of a power conversion module according to the first preferred embodiment of the present disclosure. Figure 2A is Figure 1 a circuit structure schematic diagram of a power conversion circuit of the first embodiment constituted by the power conversion module shown. Figure 2B is Figure 2A an operating timing diagram of switches in the power conversion circuit shown. Figure 2C is Figure 2A in the power conversion circuit shown at Figure 2B the time t0 - t1 shown. As Figure 1 、 2A, as shown in FIGS. 2B and 2C, the power conversion module 1 of this embodiment can form a non-isolated power conversion circuit, and the non-isolated power conversion circuit can adopt a resonant type circuit topology with an expandable duty cycle. Under the condition of the resonant type circuit topology with an expandable duty cycle, the power conversion circuit formed by the power conversion module 1 can also be a symmetric type, such as Figure 2A shown, or an asymmetric type, such as Figure 8 shown, but not limited thereto.

[0050] Taking Figure 2A the symmetric type as an example, the power conversion circuit 1A formed by the power conversion module 1 includes a high voltage side, a low voltage side, a high voltage side circuit 10, a low voltage side circuit 11, and a magnetic component 12. The high voltage side includes a high voltage positive electrode V1+ and a high voltage negative electrode V1-. The power conversion circuit 1A receives the input voltage Vin via the high voltage positive electrode V1+ and the high voltage negative electrode V1-. The low voltage side includes a low voltage positive electrode V2+ and a low voltage negative electrode V2-. The power conversion circuit 1A outputs the output voltage Vo via the low voltage positive electrode V2+ and the low voltage negative electrode V2-. In addition, the low voltage negative electrode V2- is further electrically connected to the high voltage negative electrode V1-. Therefore, the power conversion circuit 1A is a non-isolated power conversion circuit. The magnetic component 12 is a transformer and includes two first windings T21, T22 that are electromagnetically coupled to each other.

[0051] The high voltage side circuit 10 is electrically connected to the high voltage positive electrode V1+ and the high voltage negative electrode V1-, and is electrically connected to the first ends of the two first windings T21, T22 of the magnetic component 12 respectively. The low voltage side circuit 11 is electrically connected to the low voltage positive electrode V2+ and the low voltage negative electrode V2-, and is electrically connected to the second ends of the two first windings T21, T22 of the magnetic component 12 respectively. The second ends of the two first windings T21, T22 are opposite ends, and are electrically connected to form the low voltage positive electrode V2+ of the power conversion circuit 1A.

[0052] In some embodiments, the high-voltage side circuit 10 includes a high-voltage side capacitor C1, a first flying capacitor Cr1, a second flying capacitor Cr2, a first switch group, and a second switch group. The first end of the high-voltage side capacitor C1 is electrically connected to the high-voltage positive terminal V1+ of the high-voltage side, and the second end of the high-voltage side capacitor C1 is electrically connected to the high-voltage negative terminal V1- of the high-voltage side. The high-voltage side capacitor C1 is used to filter the voltage ripple on the high-voltage side. The first switch group includes a first switch S1A, a second switch S2B, and a third switch S2C. The structure of the second switch group is similar to that of the first switch group, that is, it includes a fourth switch S2A, a fifth switch S1B, and a sixth switch S1C. The first end of the first switch S1A is electrically connected to the high-voltage positive terminal V1+, the second end of the first switch S1A is electrically connected to the first end of the fifth switch S1B, the second end of the fifth switch S1B is electrically connected to the first end of the sixth switch S1C, and the second end of the sixth switch S1C is electrically connected to the high-voltage negative terminal V1-. The first end of the fourth switch S2A is electrically connected to the high-voltage positive terminal V1+ and is electrically connected in parallel with the first switch S1A. The second end of the fourth switch S2A is electrically connected to the first end of the second switch S2B, the second end of the second switch S2B is electrically connected to the first end of the third switch S2C, and the second end of the third switch S2C is electrically connected to the high-voltage negative terminal V1-. The first end of the first flying capacitor Cr1 is electrically connected to the second end of the first switch S1A, and the second end of the first flying capacitor Cr1 is electrically connected to the second end of the second switch S2B and the first end of the third switch S2C. The first end of the second flying capacitor Cr2 is electrically connected to the second end of the fourth switch S2A, and the second end of the second flying capacitor Cr2 is electrically connected to the second end of the fifth switch S1B and the first end of the sixth switch S1C. In addition, the switching states of the first switch S1A, the second switch S2B, and the sixth switch S1C are the same, and the switching states of the fourth switch S2A, the fifth switch S1B, and the third switch S2C are the same. For example

[0053] The low-voltage side circuit 11 includes a low-voltage side capacitor C2. The first end of the low-voltage side capacitor C2 is electrically connected to the low-voltage positive terminal V2+ of the low-voltage side, and the second end of the low-voltage side capacitor C2 is electrically connected to the low-voltage negative terminal V2- of the low-voltage side. The low-voltage side capacitor C2 is used to filter the voltage ripple on the low-voltage side.

[0054] In addition, the switching state of the first switch S1A, the switching state of the second switch S2B, and the switching state of the sixth switch S1C are the same, and the switching state of the fourth switch S2A, the switching state of the fifth switch S1B, and the switching state of the third switch S2C are the same. For example Figure 2BAs shown, within a switching cycle from time t0 to t4, the first switch S1A, the second switch S2B, and the sixth switch S1C are turned on during the time interval from t0 to t1, and the fourth switch S2A, the fifth switch S1B, and the third switch S2C are turned on during the time interval from t2 to t3, where the time from t0 to t4 is one switching cycle, and the time from t1 to t2 and the time from t3 to t4 are dead times. Additionally, the control signals of the first switch S1A and the fourth switch S2A are out of phase by 180 degrees. Also, if the existence of dead time is not considered, the duty cycle of each switch is close to 50%.

[0055] In this embodiment, whether during the time interval from t0 to t1 or during the time interval from t2 to t3, there are three AC current loops in the power conversion module 1. Taking the case where the first switch S1A, the second switch S2B, and the sixth switch S1C are turned on simultaneously during the time interval from t0 to t1 as an example, as Figure 2C shown, there are a total of three AC current loops in the power conversion circuit 1A. The first AC current loop ( Figure 2C labeled as A) is the loop formed by the high-voltage side capacitor C1, the first switch S1A, the first flying capacitor Cr1, the first winding T21, and the low-voltage side capacitor C2. The second AC current loop ( Figure 2C labeled as B) is the loop formed by the sixth switch S1C, the second flying capacitor Cr2, the second switch S2B, the first winding T21, and the low-voltage side capacitor C2. The third AC current loop ( Figure 2C labeled as C) is the loop formed by the sixth switch S1C, the first winding T22, and the low-voltage side capacitor C2. As can be seen from the above, within the time from t0 to t1, among the three AC current loops of the power conversion circuit 1A, the AC current flowing through the first winding T21 not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11; similarly, the AC current flowing through the first winding T22 not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11.

[0056] Similarly, when the fourth switch S2A, the fifth switch S1B, and the third switch S2C are turned on simultaneously at time t2 - t3, there are also three AC current loops in the power conversion module 1. The first AC current loop is formed by the high-voltage side capacitor C1, the fourth switch S2A, the second flying capacitor Cr2, the first winding T22, and the low-voltage side capacitor C2. The second AC current loop is formed by the third switch S2C, the first flying capacitor Cr1, the fifth switch S1B, the first winding T22, and the low-voltage side capacitor C2. The third AC current loop is formed by the third switch S2C, the first winding T21, and the low-voltage side capacitor C2. As can be seen from the above, within the time t2 - t3, among the three AC current loops of the power conversion circuit 1A, the AC current flowing through the first winding T22 not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11. Similarly, the AC current flowing through the first winding T21 not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11.

[0057] Since in the power conversion circuit 1A formed by the power conversion module 1, the AC current flowing through any one of the first windings not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11, thus in the present disclosure, as Figure 1 shown, the high-voltage side circuit 10 and the low-voltage side circuit 11 are both arranged on the same side of the magnetic component 12, that is, the high-voltage side circuit 10 and the low-voltage side circuit 11 are both arranged in the area 13, so that the multiple AC current loops (the first AC current loop, the second AC current loop, and the third AC current loop formed at time t0 - t1, or the first AC current loop, the second AC current loop, and the third AC current loop formed at time t2 - t3) flowing through the high-voltage side circuit 10 and the low-voltage side circuit 11 in the power conversion module 1 are located on the same side of the magnetic component 12, rather than straddling the opposite sides of the magnetic component 12. In this way, the path of each AC current loop of the power conversion circuit 1A can be shortened, thereby reducing the AC loss of the power conversion circuit 1A. Moreover, since the high-voltage side circuit 10 and the low-voltage side circuit 11 are placed on the same side of the magnetic component 12, that is, on the same side of the power conversion module 1, the components can be placed closely, reducing the size of the power conversion module 1.

[0058] Please refer to Figure 3 and cooperate with Figure 2B and Figure 2C wherein Figure 3Schematic diagram of the circuit layout of the power conversion module according to the second preferred embodiment of the present disclosure. As shown in the figure, taking the time interval t0 - t1 as an example, since the alternating current flowing through the third alternating current loop is equal to the sum of the alternating currents flowing through the first alternating current loop and the second alternating current loop, if the alternating current loop of the third alternating current loop can be made the minimum path, thereby reducing the area enclosed by the third alternating current loop, the alternating current loss can be more effectively reduced. To achieve the above technical effects, in some embodiments, at least one of the sixth switch S1C, the third switch S2C, and the low - voltage - side capacitor C2 constituting the third alternating current loop is placed as close as possible to the magnetic component 12, that is, at least one side of at least one of the sixth switch S1C, the third switch S2C, and the low - voltage - side capacitor C2 is adjacent to one side of the magnetic component 12. Thus, at least one of the sixth switch S1C, the third switch S2C, and the low - voltage - side capacitor C2 is the element closest to the magnetic component 11 compared to other elements of the high - voltage - side circuit 10 and the low - voltage - side circuit 11, so that the path of the third alternating current loop formed by at least one of the sixth switch S1C, the third switch S2C, the low - voltage - side capacitor C2 and some elements of the first windings T21 and T22 is shorter. In some embodiments, the sixth switch S1C, the third switch S2C, and the low - voltage - side capacitor C2 can be arranged in a first column in the way of being all placed close to the magnetic component 12, that is, the sixth switch S1C, the third switch S2C, and the low - voltage - side capacitor C2 are the three elements closest to the magnetic component 11 compared to other elements of the high - voltage - side circuit 10 and the low - voltage - side circuit 11, so that the path of the third alternating current loop formed by the sixth switch S1C, the third switch S2C, the low - voltage - side capacitor C2 and some elements of the first windings T21 and T22 is the shortest.

[0059] Please refer to Figure 4A and Figure 4B , Figure 4A Schematic diagram of the circuit layout of the power conversion module according to the third preferred embodiment of the present disclosure, showing one of the first windings Figure 4B Schematic diagram of the circuit layout of the power conversion module according to the third preferred embodiment of the present disclosure, showing the other first winding. In some embodiments, both of the first windings T21 and T22 of the magnetic component 12 are implemented by planar windings disposed within the printed circuit board, wherein in Figure 4A , the second end of the first winding T21 is electrically connected to the first end of the low - voltage - side capacitor C2, the first end of the first winding T21 is electrically connected to the first end of the third switch S2C, and the vertical projection of the third switch S2C on the first winding T21 partially overlaps the first winding T21; in Figure 4BIn the figure, the second end of the first winding T22 is electrically connected to the first end of the low-voltage side capacitor C2, and the first end of the first winding T22 is electrically connected to the first end of the sixth switch S1C. Moreover, the vertical projection of the sixth switch S1C on the first winding T22 partially overlaps with the first winding T22, thereby further reducing the path of the third alternating current loop and further achieving the purpose of reducing the alternating current loss of the power conversion module 1. In other embodiments, in order to make the coupling coefficient of the magnetic component 12 as high as possible, the projections of the first winding T21 and the first winding T22 on the horizontal plane need to highly overlap, preferably the overlap rate of the projections of the first winding T21 and the first winding T22 on the horizontal plane > 80%.

[0060] Please refer to Figure 5 , which is a schematic circuit layout diagram of the power conversion module according to the fourth preferred embodiment of the present disclosure. In some embodiments, under the layout architecture of the components of the third alternating current loop shown in FIG. 4, the component layouts of the first alternating current loop and the second alternating current loop formed can be, for example Figure 5 shown, that is, the fifth switch S1B, the second flying capacitor Cr2, and the second switch S2B are arranged in sequence in the second column, the first switch S1A, the first flying capacitor Cr1, and the fourth switch S2A are arranged in sequence in the third column. The first column, the second column, and the third column are parallel to each other, and the second column is between the first column and the third column. Thereby, the paths of the first alternating current loop and the second alternating current loop can be shortened, and the area enclosed by the two alternating current loops can be reduced, thus reducing the alternating current loss of the power conversion module 1. In addition, the high-voltage side capacitor C1 can be adjacent to the first ends of the first column, the second column, and the third column and adjacent to the first switch S1A, the fifth switch S1B, and the sixth switch S1C. Of course, the high-voltage side capacitor C1 can also be adjacent to the second ends of the first column, the second column, and the third column and adjacent to the fourth switch S2A, the second switch S2B, and the third switch S2C.

[0061] Please refer to Figure 6 , which is a schematic circuit layout diagram of the power conversion module according to the fifth preferred embodiment of the present disclosure. In some embodiments, under the layout architecture of the components of the third alternating current loop shown in FIG. 4, the component layouts of the first alternating current loop and the second alternating current loop formed can also be, for example Figure 6As shown, that is, the first flying capacitor Cr1, the fifth switch S1B, and the second flying capacitor Cr2 are arranged in sequence in the second column, and the first switch S1A, the second switch S2B, and the fourth switch S2A are arranged in sequence in the third column. The first column, the second column, and the third column are parallel to each other, and the second column is between the first column and the third column. Thereby, the paths of the first AC current loop and the second AC current loop can be shortened, and the area enclosed by the two AC current loops becomes smaller, thereby reducing the AC loss of the power conversion module 1. In addition, the high-voltage side capacitor C1 can be adjacent to the first ends of the first column, the second column, and the third column and be close to the first switch S1A, the first flying capacitor Cr1, and the sixth switch S1C. Of course, the high-voltage side capacitor C1 can also be adjacent to the second ends of the first column, the second column, and the third column and be close to the fourth switch S2A, the second flying capacitor Cr2, and the third switch S2C.

[0062] Please refer to Figure 7 , which is Figure 1 a schematic circuit structure diagram of the power conversion circuit of the second embodiment constituted by the power conversion module shown. The Figure 1 circuit structure of the power conversion circuit 1B of this embodiment constituted by the power conversion module 1 is similar to Figure 2A , and in this embodiment, the second end of the high-voltage side capacitor C1 of the power conversion circuit 1B of this embodiment is changed to be electrically connected to the low-voltage positive electrode V2+ of the low-voltage side. The high-voltage side capacitor C1 and the low-voltage side capacitor C2 are connected in series to filter the voltage ripple on the high-voltage side, and the switch control mode of the power conversion circuit 1B of this embodiment is similar to Figure 2B shown, and will not be elaborated.

[0063] In this embodiment, when the first switch S1A, the second switch S2B, and the sixth switch S1C are simultaneously turned on at time t0 - t1, there are a total of three AC current loops in the power conversion circuit 1B. The first AC current loop is the loop constituted by the high-voltage side capacitor C1, the first switch S1A, the first flying capacitor Cr1, and the first winding T21. The second AC current loop is the loop constituted by the sixth switch S1C, the second flying capacitor Cr2, the second switch S2B, the first winding T21, and the low-voltage side capacitor C2. The third AC current loop is the loop constituted by the sixth switch S1C, the first winding T22, and the low-voltage side capacitor C2. As can be seen from the above, within the time t0 - t1, the three AC current loops of the power conversion circuit 1B not only flow through the high-voltage side circuit 10, but also flow through the low-voltage side circuit 11, that is, the AC current flowing through any first winding not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11.

[0064] Similarly, when the fourth switch S2A, the fifth switch S1B, and the third switch S2C are simultaneously turned on during the time t2 - t3, there are also three AC current loops in the power conversion circuit 1B. The first AC current loop is formed by the high-voltage side capacitor C1, the fourth switch S2A, the second flying capacitor Cr2, and the first winding T22. The second AC current loop is formed by the third switch S2C, the first flying capacitor Cr1, the fifth switch S1B, the first winding T22, and the low-voltage side capacitor C2. The third AC current loop is formed by the third switch S2C, the first winding T21, and the low-voltage side capacitor C2. As can be seen from the above, during the time t2 - t3, the three AC current loops of the power conversion circuit 1B not only flow through the high-voltage side circuit 10 but also flow through the low-voltage side circuit 11, that is, the AC current flowing through any first winding not only flows through the high-voltage side circuit 10 but also flows through the low-voltage side circuit 11.

[0065] Therefore, in this embodiment, the power conversion circuit 1B can also adopt the layout method of the power conversion module 1 disclosed above to achieve technical effects such as reducing the AC loss and size of the power conversion module 1, which will not be elaborated here.

[0066] Please refer to Figure 8 , which is Figure 1 a schematic circuit diagram of the power conversion circuit of the third embodiment composed of the power conversion module shown. Under the condition that the power conversion circuit is non-isolated and adopts a resonant-type expandable duty cycle circuit topology, the power conversion circuit composed of the power conversion module shown in Figure 1 can be an asymmetric circuit topology. For example, the power conversion circuit 1C shown in Figure 8 includes a high-voltage side, a low-voltage side, a high-voltage side circuit 20, a low-voltage side circuit 21, and a magnetic component 22. The high-voltage side includes a high-voltage positive electrode V1+ and a high-voltage negative electrode V1-. The power conversion circuit 1C receives the input voltage Vin via the high-voltage positive electrode V1+ and the high-voltage negative electrode V1-. The low-voltage side includes a low-voltage positive electrode V2+ and a low-voltage negative electrode V2-. The power conversion circuit 1C outputs the output voltage Vo via the low-voltage positive electrode V2+ and the low-voltage negative electrode V2-. In addition, the low-voltage negative electrode V2- is electrically connected to the high-voltage negative electrode V1-, so the power conversion circuit 1C is a non-isolated power conversion circuit. The magnetic component 22 is a transformer and includes two first windings T21, T22 that are electromagnetically coupled to each other.

[0067] The high-voltage side circuit 20 is electrically connected to the high-voltage positive electrode V1+ and the high-voltage negative electrode V1-, and is electrically connected to the first ends of the two first windings T21 and T22 of the magnetic component 22. The low-voltage side circuit 21 is electrically connected to the low-voltage positive electrode V2+ and the low-voltage negative electrode V2-, and is electrically connected to the second ends of the two first windings T21 and T22 of the magnetic component 22, wherein the second ends of the two first windings T21 and T22 are opposite-named ends, and are electrically connected to form the low-voltage positive electrode V2+ of the power conversion circuit 1C.

[0068] In some embodiments, the high-voltage side circuit 20 includes a high-voltage side capacitor C1, a first switch group, a second switch group, and a first flying capacitor Cr1. The first end of the high-voltage side capacitor C1 is electrically connected to the high-voltage positive electrode V1+ on the high-voltage side, and the second end of the high-voltage side capacitor C1 is electrically connected to the high-voltage negative electrode V1- on the high-voltage side. The high-voltage side capacitor C1 is used to filter the voltage ripple on the high-voltage side. The first switch group includes a first switch S1a and a third switch S2c connected in series. The second switch group includes a second switch S1b and a fourth switch S1c connected in series. Wherein the first switch S1a, the second switch S1b, the third switch S2c, and the fourth switch S1c are periodically switched within a switching period. In addition, the second end of the first switch S1a is electrically connected to the first end of the second switch S1b, the first end of the first switch S1a is electrically connected to the high-voltage positive electrode V1+, the first end of the fourth switch S1c is electrically connected to the second end of the second switch S1b, and the second ends of the third switch S2c and the fourth switch S1c are electrically connected and electrically connected to the high-voltage negative electrode V1-. Furthermore, the control signal of the first switch S1a is the same as the control signal of the fourth switch S1c, the switching state of the second switch S1b is the same as the switching state of the third switch S2c, and the switching state of the first switch S1a is out of phase with the switching state of the second switch S1b by 180 degrees, and the conduction time of the first switch S1a and the second switch S1b is less than or equal to half of the switching period and greater than or equal to 0.4 times of the switching period. The first end of the first flying capacitor Cr1 is electrically connected to the second end of the first switch S1a and the first end of the second switch S1b, and the second end of the first flying capacitor Cr1 is electrically connected to the first end of the third switch S2c. The low-voltage side circuit includes a low-voltage side capacitor C2. The first end of the low-voltage side capacitor C2 is electrically connected to the low-voltage positive electrode V2+ on the low-voltage side, and the second end of the low-voltage side capacitor C2 is electrically connected to the low-voltage negative electrode V2- on the low-voltage side. The low-voltage side capacitor C2 is used to filter the voltage ripple on the low-voltage side.

[0069] When the first switch S1a and the fourth switch S1c are turned on, there are two AC current loops in the power conversion circuit 1C. The first AC current loop is the loop formed by the high-voltage side capacitor C1, the first switch S1a, the first flying capacitor Cr1, the first winding T21, and the low-voltage side capacitor C2. The second AC current loop is the loop formed by the fourth switch S1c, the first winding T22, and the low-voltage side capacitor C2. As can be seen from the above, when the first switch S1a and the fourth switch S1c are turned on, at least one AC current loop of the power conversion module 1C not only flows through the high-voltage side circuit 20, but also flows through the low-voltage side circuit 21, that is, the AC current flowing through any winding not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11.

[0070] When the second switch S1b and the third switch S2c are turned on, there are two AC current loops in the power conversion circuit 1C. The first AC current loop is the loop formed by the third switch S2c, the first flying capacitor Cr1, the second switch S1b, the first winding T22, and the low-voltage side capacitor C2. The second AC current loop is the loop formed by the third switch S2c, the first winding T21, and the low-voltage side capacitor C2. As can be seen from the above, when the second switch S1b and the third switch S2c are turned on, at least one AC current loop of the power conversion module 1C not only flows through the high-voltage side circuit 20, but also flows through the low-voltage side circuit 21. The AC current flowing through any winding not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11.

[0071] Therefore, in this embodiment, the power conversion circuit 1C can also adopt the layout method of the power conversion module 1 disclosed above to achieve technical effects such as reducing the AC loss and size of the power conversion module, which will not be elaborated here.

[0072] Please refer to Figure 9 which is Figure 1 a schematic circuit diagram of the power conversion circuit of the fourth embodiment constituted by the power conversion module shown. The power conversion circuit 1D of this embodiment constituted by the power conversion module 1 shown in Figure 1 is similar to the power conversion circuit 1C of Figure 8 . In this embodiment, the second end of the high-voltage side capacitor C1 of the power conversion circuit 1D of this embodiment is changed to be electrically connected to the low-voltage positive electrode V2+ of the low-voltage side. The high-voltage side capacitor C1 and the low-voltage side capacitor C2 are connected in series to filter the voltage ripple on the high-voltage side. The switch control method of the power conversion circuit 1D of this embodiment is similar to that of the switch of the power conversion circuit 1C of Figure 8 and will not be elaborated.

[0073] When the first switch S1a and the fourth switch S1c are turned on, there are two AC current loops in the power conversion circuit 1C. The first AC current loop is the loop formed by the high-voltage side capacitor C1, the first switch S1a, the first flying capacitor Cr1, and the first winding T21. The second AC current loop is the loop formed by the fourth switch S1c, the first winding T22, and the low-voltage side capacitor C2. As can be seen from the above, when the first switch S1a and the fourth switch S1c are turned on, at least one AC current loop of the power conversion module 1C not only flows through the high-voltage side circuit 20, but also flows through the low-voltage side circuit 21. That is, the AC current flowing through the first winding T22 not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11.

[0074] When the second switch S1b and the third switch S2c are turned on, there are two AC current loops in the power conversion circuit 1C. The first AC current loop is the loop formed by the third switch S2c, the first flying capacitor Cr1, the second switch S1b, the first winding T22, and the low-voltage side capacitor C2. The second AC current loop is the loop formed by the third switch S2c, the first winding T21, and the low-voltage side capacitor C2. As can be seen from the above, when the second switch S1b and the third switch S2c are turned on, at least one AC current loop of the power conversion module 1D not only flows through the high-voltage side circuit 20, but also flows through the low-voltage side circuit 21. That is, the AC current flowing through the first winding T21 not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11.

[0075] Please refer to Figure 10 , which is Figure 1 a schematic circuit diagram of the power conversion circuit of the fifth embodiment formed by the power conversion module shown. From Figure 1 The circuit structure of the power conversion circuit 1F of this embodiment formed by the power conversion module 1 shown is similar to Figure 2A the power conversion circuit 1A. In this embodiment, in addition to including two first windings T21 and T22, the magnetic component 12 of the power conversion circuit 1F of this embodiment further includes two second windings T23 and T24. One of the second windings T23 is connected in series with the first flying capacitor Cr1 between the second end of the first switch S1A and the first end of the third switch S2C. The other second winding T24 is connected in series with the second flying capacitor Cr*2* between the first end of the sixth switch S1C and the second end of the fourth switch S2A. And the turn ratio of each second winding to each first winding is N:1, where N is a positive integer greater than or equal to 1. Its working principle, waveform, and AC current loop are the same as Figure 2AThe AC current flowing through any first winding of the magnetic component not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11. In another embodiment, the second end of the high-voltage side capacitor C1 of the power conversion module can also be electrically connected to the low-voltage positive electrode V2+. Its working principle, waveform and AC current loop are similar to Figure 7 Similar to the figure, the AC current flowing through any first winding of the magnetic component not only flows through the high-voltage side circuit 10 , but also flows through the low-voltage side circuit 11 .

[0076] See also Figure 11 , which is Figure 1 The circuit structure diagram of the power conversion circuit of the sixth embodiment is composed of the power conversion module shown in FIG. Figure 1 The circuit structure of the power conversion circuit 1G of this embodiment formed by the power conversion module 1 is similar to that of Figure 8 The power conversion circuit 1C of this embodiment, in this embodiment, the magnetic component 12 of the power conversion circuit 1G of this embodiment further includes a second winding T23, the second winding T23 and the first flying capacitor Cr1 are electrically connected in series between the second end of the first switch S1A and the first end of the third switch S2C. The turns ratio of the second winding to each first winding is N:1, where N is a positive integer greater than or equal to 1. Its working principle, waveform and AC current loop are similar to Figure 8 The AC current flowing through the first winding of the magnetic component not only flows through the high-voltage side circuit 10, but also flows through the low-voltage side circuit 11. In other embodiments, the second end of the high-voltage side capacitor C1 of the power conversion module can also be electrically connected to the low-voltage positive electrode V2+. Its working principle, waveform and AC current loop are similar to Figure 9 Similar to the ones shown.

[0077] In another embodiment, Figure 2A and Figure 8 The magnetic component shown in FIG can also be a coupled inductor, which includes two first windings, and the electrical connection method thereof is the same as that of FIG. Figure 2A and Figure 8 As shown, the AC current flowing through any winding not only flows through the high-voltage side circuit 10 , but also flows through the low-voltage side circuit 11 .

[0078] Therefore, in the multiple embodiments, the power conversion circuit 1C can also adopt the layout of the power conversion module 1 disclosed above to achieve technical effects such as reducing the AC loss and size of the power conversion module, which will not be repeated here.

[0079] In summary, the present disclosure provides a power conversion module, wherein the high-voltage side circuit and the low-voltage side circuit of the power conversion module are all disposed on the same side of the magnetic component, so that a plurality of alternating current loops flowing through the high-voltage side circuit and the low-voltage side circuit in the power conversion module are located on the same side of the magnetic component, rather than straddling opposite sides of the magnetic component. In this way, the path of each alternating current loop of the power conversion module can be shortened, thereby reducing the AC loss of the power conversion module and achieving a compact placement of components, reducing the size of the power conversion module.

[0080] It should be noted that the above are only preferred embodiments proposed for illustrating the present disclosure. The present disclosure is not limited to the described embodiments. The scope of the present disclosure is determined by the appended claims. And the present disclosure can be variously modified by those skilled in the art, but all are not detached from what the appended claims are intended to protect.

Claims

1. A power conversion module, comprising: A high-voltage side, including a high-voltage positive electrode and a high-voltage negative electrode; A low-voltage side, including a low-voltage positive electrode and a low-voltage negative electrode, wherein the low-voltage negative electrode is electrically connected to the high-voltage negative electrode; A magnetic component, including two first windings; A high-voltage side circuit, electrically connected to the high-voltage positive electrode and the high-voltage negative electrode, and electrically connected to a first end of the two first windings of the magnetic component; and A low-voltage side circuit, electrically connected to the low-voltage positive electrode and the low-voltage negative electrode, and electrically connected to a second end of the two first windings of the magnetic component; Wherein the power conversion module includes at least one alternating current, the alternating current flows through one of the first windings of the magnetic component, and flows through the high-voltage side circuit and the low-voltage side circuit, and the high-voltage side circuit and the low-voltage side circuit are arranged on the same side of the magnetic component so as to shorten the path of the alternating current loop.

2. The power conversion module according to claim 1, wherein the low-voltage side circuit includes a low-voltage side capacitor, a first end of the low-voltage side capacitor is electrically connected to the low-voltage positive electrode, a second end of the low-voltage side capacitor is electrically connected to the low-voltage negative electrode, and the low-voltage side capacitor is used to filter voltage ripples on the low-voltage side.

3. The power conversion module according to claim 2, wherein the high-voltage side circuit includes: A high-voltage side capacitor, a first end of the high-voltage side capacitor is electrically connected to the high-voltage positive electrode, a second end of the high-voltage side capacitor is electrically connected to the high-voltage negative electrode or the low-voltage positive electrode; A first switch group, including a first switch and a third switch connected in series; A second switch group, including a fifth switch and a sixth switch connected in series, wherein a second end of the first switch is electrically connected to a first end of the fifth switch, a first end of the first switch is electrically connected to the high-voltage positive electrode, a second end of the third switch and a second end of the sixth switch are electrically connected to the high-voltage negative electrode, and a first end of the sixth switch is electrically connected to a second end of the fifth switch; A first flying capacitor, a first end of the first flying capacitor is electrically connected to the second end of the first switch and the first end of the fifth switch, and a second end is electrically connected to a first end of the third switch.

4. The power conversion module according to claim 3, wherein A first end of one of the two first windings is electrically connected to the first end of the third switch, a second end is electrically connected to the low-voltage positive electrode, a first end of the other of the two first windings is electrically connected to the first end of the sixth switch, a second end is electrically connected to the low-voltage positive electrode, and the second ends of the two first windings are of opposite polarities.

5. The power conversion module according to claim 3, wherein at least one of the sixth switch, the third switch and the low-voltage side capacitor has a side adjacent to a side of the magnetic component.

6. The power conversion module according to claim 5, wherein the sixth switch, the third switch and the low-voltage side capacitor are arranged in a first column in sequence and adjacent to a side of the magnetic component.

7. The power conversion module according to claim 3, further including a second winding, wherein the second winding is connected in series with the first flying capacitor between the second end of the first switch and the first end of the third switch.

8. The power conversion module according to claim 6, wherein the first switch group further includes a second switch, the second switch group further includes a fourth switch, and the power conversion module further includes a second flying capacitor, wherein, A second terminal of the second switch is electrically connected to a first terminal of the third switch. A first terminal of the fourth switch is electrically connected to the high-voltage positive electrode. A second terminal of the fourth switch is electrically connected to a first terminal of the second switch. A first terminal of the second flying capacitor is electrically connected to the second terminal of the fourth switch. A second terminal of the second flying capacitor is electrically connected to the second terminal of the fifth switch and the first terminal of the sixth switch.

9. The power conversion module according to claim 8, further comprising two second windings, wherein one of the second windings is connected in series with the first flying capacitor and electrically connected between the second terminal of the first switch and the first terminal of the third switch, and the other second winding is connected in series with the second flying capacitor and electrically connected between the first terminal of the sixth switch and the second terminal of the fourth switch.

10. The power conversion module according to claim 8, wherein the fifth switch, the second flying capacitor and the second switch are arranged in sequence to form a second column, the first switch, the first flying capacitor and the fourth switch are arranged in sequence to form a third column, the first column, the second column and the third column are parallel to each other, and the second column is between the first column and the third column, and the high-voltage side capacitor is adjacent to the first ends of the first column, the second column and the third column and is close to the first switch, the fifth switch and the sixth switch, or the high-voltage side capacitor is adjacent to the second ends of the first column, the second column and the third column and is close to the fourth switch, the second switch and the third switch.

11. The power conversion module according to claim 8, wherein the first flying capacitor, the fifth switch and the second flying capacitor are arranged in sequence to form a second column, the first switch, the second switch and the fourth switch are arranged in sequence to form a third column, the first column, the second column and the third column are parallel to each other, and the second column is between the first column and the third column, the high-voltage side capacitor is adjacent to the first ends of the first column, the second column and the third column and is close to the first switch, the first flying capacitor and the sixth switch, or the high-voltage side capacitor is adjacent to the second ends of the first column, the second column and the third column and is close to the fourth switch, the second flying capacitor and the third switch.

12. The power conversion module according to claim 3, wherein the two first windings are implemented by planar windings.

13. The power conversion module according to claim 7 or 9, wherein one or both of the second windings are implemented by planar windings.

14. The power conversion module according to claim 12, wherein the vertical projection of the third switch on one of the first windings coincides with the corresponding part of the first winding, and the vertical projection of the sixth switch on the other first winding coincides with the corresponding part of the first winding.

15. The power conversion module according to claim 12, wherein the projections of the two first windings on the horizontal plane at least partially coincide.

16. The power conversion module according to claim 15, wherein the coincidence rate of the projections of the two first windings on the horizontal plane is > 80%.

Images