Transformer

Abstract

The invention provides a transformer (Transform), which comprises a core (Core), a primary winding (Primary winding) and a plurality of secondary windings (secondary windings), wherein the primary winding (Primary winding) and the secondary windings (secondary windings) are arranged on the core (Core). The core has a first pillar (Leg) and a second pillar. At least a portion of the primary winding is wound around the first post of the core. The main winding comprises a first secondary main winding. The first secondary main winding comprises a first auxiliary secondary main winding and a second auxiliary secondary main winding. The first auxiliary secondary primary winding and the second auxiliary secondary primary winding are two-wire wound and connected in parallel. Some of the secondary windings are wound around the first cylinder of the core, and the other of the secondary windings are wound around the second cylinder of the core.

Description

Technical Field

[0001] The present invention relates to a transformer used for simultaneously charging a battery of an electric vehicle (EV) and an electronic device or equipment used in the vehicle. Background Art

[0002] International efforts to reduce global warming have begun, and the development of electric vehicles has made significant progress in eliminating fuel consumption. The charging equipment industry is keenly observing the trend of vehicle electrification and is actively building more charging stations across the country, including home charging facilities, to increase the convenience of charging electric vehicles. Transformers play a very important role in converting the main power of the grid to the battery pack to charge the electric vehicle located at the charging station or home charging point. In order to improve the efficiency of battery charging at various potentials, a transformer specially designed for high-efficiency charging is highly desired. Summary of the invention

[0003] According to the present invention, a transformer is provided, comprising a core, a primary winding, and a plurality of secondary windings. The core has a first column (Leg) and a second column. At least part of the primary winding is wound around the first column of the core. The primary winding comprises a first secondary main winding. The first secondary main winding comprises a first auxiliary secondary main winding and a second auxiliary secondary main winding. The first auxiliary secondary main winding and the second auxiliary secondary main winding are bifilar wound and connected in parallel. Some of the secondary windings are wound around the first column of the core, while the other secondary windings are wound around the second column of the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 A circuit diagram of a transformer according to an embodiment of the present invention is shown;

[0005] Figure 2A Show Figure 1 The core of the transformer;

[0006] Figure 2B The diagram shows Figure 1 Schematic diagram of the transformer;

[0007] Figure 2C and Figure 2D The diagram shows Figure 2B The transformer part;

[0008] Figure 2E Another embodiment of the present invention is shown Figure 1Another core of the transformer;

[0009] Figure 3 Shown along Figure 2B A cross-sectional view of the transformer taken along section line 3A-3B;

[0010] Figure 4A Shows the corresponding Figure 1 A circuit diagram of a transformer having primary and secondary winding nodes n1 to n10a;

[0011] Figure 4B Shows the corresponding Figure 3 A cross-sectional view of a transformer having coil terminals N1 to N9a;

[0012] Figure 5A The figure shows a front view of a transformer according to an embodiment of the invention;

[0013] Figure 5B Show Figure 5A Rear view of the transformer;

[0014] Figure 5C Show Figure 5A A side view of the transformer;

[0015] Figure 5D Show FIG. 5A to FIG. 5C Schematic diagram of the metal tank in the transformer;

[0016] Figure 6 Show Figure 1 Examples of various test conditions when the transformer is operated in forward mode;

[0017] Figure 7 show when Figure 1 Examples of various test conditions when the transformer is operated in reverse mode;

[0018] Fig. 8A A circuit diagram showing a transformer according to other embodiments of the present invention;

[0019] Figure 8B It shows Fig. 8A The cross-section diagram of the transformer;

[0020] Fig. 9A A circuit diagram showing a transformer according to other embodiments of the present invention;

[0021] Fig. 9B The diagram shows Fig. 9A A cross-sectional view of the transformer shown;

[0022] Wherein, the reference numerals are:

[0023] 100,800,900: Transformer

[0024] 102: Main winding

[0025] 104: Multiple secondary windings

[0026] 202,802,902: Core

[0027] 204,804,904: First column

[0028] 206,806,906: Second column

[0029] 208: The first double T structure

[0030] 210: The second double T structure

[0031] 212: Air Gap

[0032] 214,216: Core part

[0033] 312,332,812,832,912,932: First coil layer

[0034] 314,334,814,834,914,934: Second coil layer

[0035] 316,336,816,836,918,938: The third coil layer

[0036] 318,338,818,838: Fourth coil layer

[0037] 320,322,340,342,820,822,840,842,920,922,940,942: Metal tank

[0038] 402,404: Line

[0039] 502: Opening

[0040] 520: First secondary low voltage auxiliary winding

[0041] 522: Second secondary low voltage auxiliary winding

[0042] 540: Third secondary low voltage auxiliary winding

[0043] 542: Fourth secondary low voltage auxiliary winding. DETAILED DESCRIPTION

[0044] Please refer to Figure 1 , FIG. 2A to FIG. 2D and Figure 3 , Figure 1 A circuit diagram of a transformer according to an embodiment of the present invention is shown. Figure 2A Show Figure 1 The core of the transformer Figure 2B Show Figure 1 Schematic diagram of the transformer, Figure 2C and Figure 2D Show Figure 2B The transformer part, Figure 3 Shown along Figure 2B 3A-3B of the transformer. The transformer 100 includes a core 202, a main winding 102 and a plurality of secondary windings 104. The core 202 has a first cylinder 204 and a second cylinder 206. At least a portion of the main winding 102 is wound around the first cylinder 204 of the core 202. The main winding 102 (or the main winding Lpri) includes a first secondary main winding Lpri1, and the first secondary main winding Lpri1 includes a first auxiliary secondary main winding Lpri11 and a second auxiliary secondary main winding Lpri12. The first auxiliary secondary main winding Lpri11 and the second auxiliary secondary main winding Lpri12 are bifilar wound, and the first auxiliary secondary main winding Lpri11 and the second auxiliary secondary main winding Lpri12 are connected in parallel. Some of the secondary windings 104 are wound around the first cylinder 204 of the core 202 , while some of the secondary windings 104 are wound around the second cylinder 206 of the core 202 .

[0045] The main winding 102 may also include a second secondary main winding Lpri2, which includes a third auxiliary secondary main winding Lpri21 and a fourth auxiliary secondary main winding Lpri22. The third auxiliary secondary main winding Lpri21 and the fourth auxiliary secondary main winding Lpri22 are bifilar wound and connected in parallel. The first secondary main winding Lpri1 is wound around the first cylinder 204 of the core 202, and the second secondary main winding Lpri2 is wound around the second cylinder 206 of the core 202. Nodes PRI+ and PRI- are connected to both ends of the first secondary main winding Lpri1 and both ends of the second secondary main winding Lpri2. The transformer 202 can be used to simultaneously charge the battery of an electric vehicle (EV) and charge the electronic devices or equipment used in the vehicle.

[0046] The first secondary main winding Lpri1 including the first auxiliary secondary main winding Lpri11 and the second auxiliary secondary main winding Lpri12 is formed, for example, in the first coil layer 312 and the fourth coil layer 318 of the first column 204. Each coil layer includes a certain number of coils. Since the first auxiliary secondary main winding Lpri11 and the second auxiliary secondary main winding Lpri12 are wound in two wires, half of the coils in the first coil layer 312 serve as the first auxiliary secondary main winding Lpri11, and the other coils in the first coil layer 312 serve as the second auxiliary secondary main winding Lpri12. Similarly, half of the coils in the plurality of coils in the fourth coil layer 318 serve as the first auxiliary secondary main winding Lpri11, and the other coils in the plurality of coils in the fourth coil layer 318 serve as the second auxiliary secondary main winding Lpri12. For example, the odd-numbered coils in the first coil layer 312 serve as the first auxiliary secondary main winding Lpri11 , and the even-numbered coils in the first coil layer 312 serve as the second auxiliary secondary main winding Lpri12 .

[0047] The second secondary main winding Lpri2 including the third auxiliary secondary main winding Lpri21 and the fourth auxiliary secondary main winding Lpri22 is formed, for example, in the first coil layer 332 and the fourth coil layer 338 of the second column 206. Each coil layer includes a certain number of coils. Since the third auxiliary secondary main winding Lpri21 and the fourth auxiliary secondary main winding Lpri22 are wound in bifilar, half of the coils of the plurality of coils in the first coil layer 332 serve as the third auxiliary secondary main winding Lpri21, and the other coils of the plurality of coils serve as the fourth auxiliary secondary main winding Lpri22. Similarly, half of the coils of the plurality of coils in the fourth coil layer 338 serve as the third auxiliary secondary main winding Lpri21, and the other coils of the plurality of coils in the fourth coil layer 338 serve as the fourth auxiliary secondary main winding Lpri22. For example, the odd-numbered coils of the first coil layer 332 serve as the third auxiliary secondary main winding Lpri21 , and the even-numbered coils of the first coil layer 332 serve as the fourth auxiliary secondary main winding Lpri.

[0048] Auxiliary windings, such as the first high voltage secondary winding Lhv1 and the first low voltage secondary winding Llv1, are wound around the core 202. At least a portion of the first high voltage secondary winding Lhv1 is wound around the first cylinder 204 of the core 202. Similarly, at least a portion of the first low voltage secondary winding Llv1 is also wound around the first cylinder 204 of the core 202.

[0049] In addition, the plurality of secondary windings 104 further include a second high voltage secondary winding Lhv2 and a second low voltage secondary winding Llv2. The first high voltage secondary winding Lhv1 is wound around the first cylinder 204 of the core 202, and the second high voltage secondary winding Lhv2 is wound around the second cylinder 206 of the core 202. The first low voltage secondary winding Llv1 is wound around the first cylinder 204 of the core 202, and the second low voltage secondary winding Llv2 is wound around the second cylinder 206 of the core 202.

[0050] The first high-voltage auxiliary winding Lhv1 is, for example, located in the third coil layer 316 of the first column 204. The third coil layer 316 includes a certain number of coils allocated to the first high-voltage auxiliary winding Lhv1. Similarly, the second high-voltage auxiliary winding Lhv2 is, for example, located in the third coil layer 336 of the second column 206, and the third coil layer 336 also includes a certain number of coils allocated to the second high-voltage auxiliary winding Lhv2. The first high-voltage auxiliary winding Lhv1 outputs AC power through the nodes HVDC1+ and HVDC1-, and the second high-voltage auxiliary winding Lhv2 outputs AC power through the nodes HVDC2+ and HVDC2-.

[0051] The first low-voltage auxiliary winding Llv1 includes a first secondary low-voltage auxiliary winding Llv11 and a second secondary low-voltage auxiliary winding Llv12 connected in series. Similarly, the second low-voltage auxiliary winding Llv2 includes a third secondary low-voltage auxiliary winding Llv21 and a fourth secondary low-voltage auxiliary winding Llv22 connected in series. The first low-voltage auxiliary winding Llv1 outputs AC power through nodes LVDC1+ and LVDC1-, while the second low-voltage auxiliary winding Llv2 outputs AC power through nodes LVDC2+ and LVDC2-.

[0052] The first secondary low voltage auxiliary winding Llv11 is achieved by using a metal tank 320 located outside the fourth coil layer 318. Similarly, the second secondary low voltage auxiliary winding Llv12 is achieved by using a metal tank 322 located outside the fourth coil layer 318. Therefore, the first secondary low voltage auxiliary winding Llv11 and the second secondary low voltage auxiliary winding Llv12 are both located outside the first secondary main winding Lpri1.

[0053] Similarly, the third secondary low voltage auxiliary winding Llv21 and the fourth secondary low voltage auxiliary winding Llv22 are achieved by using metal slots 340 and 342, both of which are located outside the fourth coil layer 338. The third secondary low voltage auxiliary winding Llv21 and the fourth secondary low voltage auxiliary winding Llv22 are located outside the second secondary main winding Lpri2. Since the cross-sectional area of ​​the metal slots 320, 322, 340 and 342 is larger than the cross-sectional area of ​​other coil wires, these secondary low voltage auxiliary windings can accommodate larger currents. The metal slot system is rigid or flexible.

[0054] Please refer to Figure 1 and Figure 3 Among the plurality of secondary windings, there is a vehicle-to-load (V2L) secondary winding Lv2L. The V2L secondary winding Lv2L is at least partially wound around the first cylinder 204 of the core 202. The V2L secondary winding Lv2L includes a first secondary V2L secondary winding Lv2L1, and the first secondary V2L secondary winding Lv2L1 includes a first auxiliary secondary V2L secondary winding Lv2L11 and a second auxiliary secondary V2L secondary winding Lv2L12. The first auxiliary secondary V2L secondary winding Lv2L11 and the second auxiliary secondary V2L secondary winding Lv2L12 are bifilar wound and connected in parallel.

[0055] The V2L secondary winding Lv2L also includes a second secondary V2L secondary winding Lv2L2. The second secondary V2L secondary winding Lv2L2 includes a third auxiliary secondary V2L secondary winding Lv2L21 and a fourth auxiliary secondary V2L secondary winding Lv2L22. The third auxiliary secondary V2L secondary winding Lv2L21 and the fourth auxiliary secondary V2L secondary winding Lv2L22 are bifilar-wound and connected in parallel. The first secondary V2L secondary winding Lv2L1 is wound around the first cylinder 204 of the core 202, and the second secondary V2L secondary winding Lv2L2 is wound around the second cylinder 206 of the core 202. The V2L secondary winding Lv2L outputs AC power through nodes V2L+ and V2L-.

[0056] The first secondary V2L secondary winding Lv2L1 including the first auxiliary secondary V2L secondary winding Lv2L11 and the second auxiliary secondary V2L secondary winding Lv2L12 is formed, for example, in the second coil layer 314 of the first column 204. The second coil layer 314 has a certain number of coils. Since the first auxiliary secondary V2L secondary winding Lv2L11 and the second auxiliary secondary V2L secondary winding Lv2L12 are bifilar wound, half of the coils of the plurality of coils of the second coil layer 314 serve as the first auxiliary secondary V2L secondary winding Lv2L11, and the other coils of the plurality of coils of the second coil layer 314 serve as the second auxiliary secondary V2L secondary winding Lv2L12. For example, the odd-numbered coils of the second coil layer 314 serve as the first auxiliary secondary V2L secondary winding Lv2L11, and the even-numbered coils of the second coil layer 314 serve as the second auxiliary secondary V2L secondary winding Lv2L12.

[0057] The second secondary V2L secondary winding Lv2L2 including the third auxiliary secondary V2L secondary winding Lv2L21 and the fourth auxiliary secondary V2L secondary winding Lv2L22 is formed, for example, in the second coil layer 334 of the second column 206. The second coil layer has a certain number of coils. Since the third auxiliary secondary V2L secondary winding Lv2L21 and the fourth auxiliary secondary V2L secondary winding Lv2L22 are bifilar wound, half of the coils in the plurality of coils in the second coil layer 334 serve as the third auxiliary secondary V2L secondary winding Lv2L21, and the other coils in the plurality of coils in the second coil layer 334 serve as the fourth auxiliary secondary V2L secondary winding Lv2L22. For example, the odd-numbered coils in the second coil layer 334 serve as the third auxiliary secondary V2L secondary winding Lv2L21, and the even-numbered coils in the second coil layer 334 serve as the fourth auxiliary secondary V2L secondary winding Lv2L22.

[0058] like Figure 2A As shown, the core 202 includes a first twin-T structure 208 and a second twin-T structure 210. The first twin-T structure 208 and the second twin-T structure 210 are opposite to each other. There is an air gap 212 between the first twin-T structure 208 and the second twin-T structure 210. The core 202 is made of ferrite.

[0059] In addition, in another embodiment, there is no air gap between the first twin-T structure 208 and the second twin-T structure 210. Figure 2E As shown, Figure 2E Another embodiment of the present invention is shown. Figure 1 In another core of a transformer, a portion of the core 202 is made of ferrite, while the first column 204 and the second column 206 are made of iron powder. For example, the portion 214 and the portion 216 of the core 202 are made of ferrite. In this design, there is no air gap between the first twin-T structure 208 and the second twin-T structure 210.

[0060] exist Figure 2C , the fourth coil layer 318 and 338 and the metal slots 320, 322, 340, and 342 are shown. The metal slots 320 and 322 cover the fourth coil layer 318, and the metal slots 340 and 342 cover the fourth coil layer 338. Figure 2D , a first coil layer 312 is shown wound around the first column 204. Since the first auxiliary secondary main winding Lpri11 and the second auxiliary secondary main winding Lpri12 are formed by bifilar winding to form the first coil layer 312, two wires (including wires 402 and 404) are used to wind the first column 204 to form the first coil layer 312.

[0061] Please refer to Figure 4A and Figure 4B , Figure 4A Shows the corresponding Figure 1 Circuit diagram of a transformer having primary and secondary winding nodes n1 to n10a. Figure 4B Shows the corresponding Figure 3 A cross-sectional view of a transformer having coil terminals N1 to N9a. Figure 4B The direction of the arrow in the figure indicates the winding direction of the wire of the coil. The nodes n1 to n9a correspond to the end points N1 to N9a.

[0062] For the first coil layer 312, the first wire and the second wire are wound from the end point N1 to the end point NA. Then, the third wire and the fourth wire are wound from the end point N3 to the end point N4 to form the second coil layer 314, and the fifth wire is wound from the end point N5 to the end point N6 to form the third coil layer 316. After that, the first wire and the second wire are continuously wound from the end point NA' connected to the end point NA to the end point N2 to form the fourth coil layer 318.

[0063] Similarly, for the first coil layer 332, the sixth and seventh wires are wound from the end point N1' to the end point NA" in a direction opposite to the direction of the first and second wires of the coil layer 312. Then, the eighth and ninth wires are wound from the end point N3' to the end point N4' in a direction opposite to the direction of the third and fourth wires of the coil layer 314 to form the second coil layer 334. And, the tenth wire is wound from the end point N5a to the end point N6a in a direction opposite to the direction of the fifth wire of the coil layer 316 to form The third coil layer 336. Then, the sixth and seventh wires are continuously wound from the end point NA"' connected to the end point NA" to the end point N2' in the opposite direction to the direction of the first and second wires of the coil layer 318 to form the fourth coil layer 338. For example, when the wires in the first column are wound in a clockwise direction, the wires in the second column will be wound in a counterclockwise direction. The end points N1 and N1' are electrically connected, the end points N2 and N2' are electrically connected, the end points N3 and N3' are electrically connected, and the end points N4 and N4' are electrically connected.

[0064] Please refer to FIG. 5A to FIG. 5D , Figure 5A shows a front view of a transformer according to an embodiment of the present invention, Figure 5B Shows Figure 5A Rear view of the transformer. Figure 5C Shows Figure 5A The side view of the transformer Figure 5D Shows FIG. 5A to FIG. 5C Schematic diagram of the metal tank in the transformer. Figures 1 to 3 The transformer and FIG. 5A to FIG. 5DThe difference of the transformer is that each of the first secondary low-voltage auxiliary winding to the fourth secondary low-voltage auxiliary winding implemented by the metal tank body has an opening 502. One terminal N8 of the first secondary low-voltage auxiliary winding 520 is electrically connected to one terminal N9 of the second secondary low-voltage auxiliary winding 522. One terminal N8A of the third secondary low-voltage auxiliary winding 540 is electrically connected to one terminal N9A of the fourth secondary low-voltage auxiliary winding 542.

[0065] Please refer to Figure 6 , Figure 6 Shows Figure 1 1. When the transformer 100 is operated in the forward mode, an alternating current is supplied to the primary winding 102, thereby inducing an alternating current in the plurality of secondary windings 104. Figure 6 Different test conditions are described, including, for example, test conditions 1F to 7F. In test condition 1F, AC power is provided to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, for example, for charging a high-voltage battery of an electric vehicle. In test condition 2F, AC power is provided to nodes LVDC1+ and LVDC1-, and nodes LVDC2+ and LVDC2-, for example, for charging a low-voltage battery of an electric vehicle. In test condition 3F, AC power is provided to nodes LVDC1+ and LVDC1-, and nodes LVDC2+ and LVDC2-, for charging a low-voltage battery of an electric vehicle, and AC power is also provided to nodes V2L+ and V2L-, so that other electronic devices or equipment (such as a laptop, microphone, etc.) in the electric vehicle can also be used.

[0066] In test condition 4F, AC power is supplied to nodes HVDC1+ and HVDC1-, nodes HVDC2+ and HVDC2-, nodes LVDC1+ and LVDC1-, and nodes LVDC2+ and LVDC2-, for charging the high-voltage battery and low-voltage battery of the electric vehicle, respectively. In test condition 5F, AC power is supplied to nodes HVDC1+ and HVDC1-, nodes HVDC2+ and HVDC2-, nodes LVDC1+ and LVDC1-, nodes LVDC2+ and LVDC2-, and nodes V2L+ and V2L-. In test condition 6F, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes LVDC1+ and LVDC1-. In test condition 7F, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes LVDC2+ and LVDC2-.

[0067] Please refer to Figure 7 , Figure 7 Shows when Figure 1When the transformer 100 is operated in the reverse mode, AC power is supplied to the nodes HVDC1+ and HVDC1-, and / or the nodes HVDC2+ and HVDC2-, thereby inducing AC power of the main winding 102 or AC power of other nodes of the plurality of secondary windings 104. Figure 7 Different test conditions are described, including, for example, test conditions 1R to 10R.

[0068] In test condition 1R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then power is delivered to nodes LVDC1+ and LVDC1-, nodes LVDC2+ and LVDC2-, and nodes V2L+ and V2L-. In test condition 2R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then power is delivered to nodes LVDC1+ and LVDC1-, and nodes LVDC2+ and LVDC2-. In test condition 3R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then power is delivered to nodes LVDC1+ and LVDC1-, nodes LVDC2+ and LVDC2-, and AC input (e.g., grid, through nodes PRI+ and PRI-).

[0069] In test condition 4R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then the power is delivered to nodes LVDC1+ and LVDC1-, nodes LVDC2+ and LVDC2-, nodes V2L+ and V2L-, and AC input (e.g., grid, through nodes PRI+ and PRI-). In test condition 5R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then the power is delivered to nodes V2L+ and V2L-, and AC input.

[0070] In test condition 6R, AC power is supplied to nodes HVDC1+ and HVDC1-, and then power is delivered to nodes LVDC1+ and LVDC1-, nodes LVDC2+ and LVDC2-. In test condition 7R, AC power is supplied to nodes HVDC1+ and HVDC1-, and then power is delivered to nodes LVDC1+ and LVDC1-, nodes V2L+ and V2L-, and AC input. In test condition 8R, AC power is supplied to nodes HVDC1+ and HVDC1-, and then power is delivered to nodes LVDC2+ and LVDC2-, nodes V2L+ and V2L-, and AC input.

[0071] In test condition 9R, AC power is supplied to nodes HVDC1+ and HVDC1-, and then power is delivered to nodes HVDC2+ and HVDC2-. In test condition 10R, AC power is supplied to nodes HVDC1+ and HVDC1-, and nodes HVDC2+ and HVDC2-, and then power is delivered to the AC input.

[0072] Since the transformer according to the embodiment of the present invention integrates multiple output ports in a single core, the transformer can charge multiple batteries at the same time and / or provide charging power to multiple electronic devices at the same time. This design provides a cost-saving solution because only one core is needed for multiple output ports, rather than using five transformers with their own cores for HVDC1, HVDC2, LVDC1, LVDC2 and V2L output ports as in the traditional method. The transformer described in the embodiment of the present invention can independently charge multiple loads in a highly efficient and low-cost manner by utilizing a single core.

[0073] Please refer to Fig. 8A and Figure 8B , Fig. 8A shows a circuit diagram of a transformer according to another embodiment of the present invention, and Figure 8B It shows Fig. 8A The cross-section diagram of the transformer. Fig. 8A As shown, transformer 800 has an input port (denoted as nodes PRI'+ and PRI'-) and several output ports (identified as nodes HVDC1'+ and HVDC1'-, nodes LVDC1'+ and LVDC1'-, and nodes V2L'+ and V2L'-).

[0074] The main winding Lpri' includes a first secondary main winding Lpri1' and a second secondary main winding Lpri2'. The first secondary main winding Lpri1' includes a first auxiliary secondary main winding Lpri11' and a second auxiliary secondary main winding Lpri12', for example, formed in the first coil layer 8 and the fourth coil layer 818, and wound around the first column 804 of the core 802. The first auxiliary secondary main winding Lpri11' and the second auxiliary secondary main winding Lpri12' are bifilar wound and connected in parallel. The second secondary main winding Lpri2' includes a third auxiliary secondary main winding Lpri21' and a fourth auxiliary secondary main winding Lpri22', for example, formed in the first coil layer 832 and the fourth coil layer 838, and wound around the second column 806 of the core 802. The third auxiliary secondary main winding Lpri21' and the fourth auxiliary secondary main winding Lpri22' are bifilar wound and connected in parallel.

[0075] The first high-voltage auxiliary winding Lhv1' includes a first secondary high-voltage auxiliary winding Lhv11' and a second secondary high-voltage auxiliary winding Lhv12'. The first secondary high-voltage auxiliary winding Lhv11' is wound around the first cylinder 804 of the core 802 to form the third coil layer 816. Similarly, the second secondary high-voltage auxiliary winding Lhv12' is wound around the second cylinder 806 of the core 802 to form the third coil layer 836. The first secondary high-voltage auxiliary winding Lhv11' and the second secondary high-voltage auxiliary winding Lhv12' are connected in parallel.

[0076] The first low-voltage auxiliary winding Llv1' includes a first secondary low-voltage auxiliary winding Llv11' and a second secondary low-voltage auxiliary winding Llv12'. The first secondary low-voltage auxiliary winding Llv11' is wound around the first cylinder 804 of the core 802, and the second secondary low-voltage auxiliary winding Llv12' is wound around the second cylinder 806 of the core 802. The first secondary low-voltage auxiliary winding Llv11' is implemented by using metal slots 820 and 822, which are connected in series to produce a center-tap. Similarly, the second secondary low-voltage auxiliary winding Llv12' is implemented by metal slots 840 and 842, which are also connected in series to produce a center-tap. The first secondary low-voltage auxiliary winding Llv11' and the second secondary low-voltage auxiliary winding Llv12' are connected in parallel.

[0077] The V2L secondary winding Lv2L' includes a first secondary V2L secondary winding Lv2L1' and a second secondary V2L secondary winding Lv2L2'. The first secondary V2L secondary winding Lv2L1' includes a first auxiliary secondary V2L secondary winding Lv2L11' and a second auxiliary secondary V2L secondary winding Lv2L12'. The first auxiliary secondary V2L secondary winding Lv2L11' and the second auxiliary secondary V2L secondary winding Lv2L12' are wound bifilar in the second coil layer 814 and connected in parallel.

[0078] The second secondary V2L auxiliary winding Lv2L2' includes a third auxiliary secondary V2L auxiliary winding Lv2L21' and a fourth auxiliary secondary V2L auxiliary winding Lv2L22' which are bifilar-wound in the second coil layer 9 and connected in parallel.

[0079] Please refer to Fig. 9A and Fig. 9B , Fig. 9A shows a circuit diagram of a transformer according to another embodiment of the present invention, and Fig. 9B Shows Fig. 9A The cross-section diagram of the transformer is shown in Figure 1. Fig. 9A, transformer 900 has an input port (labeled as nodes PRI"+ and PRI"-) and output ports (labeled as nodes HVDC1"+ and HVDC1"- and nodes LVDC1"+ and LVDC1"-).

[0080] The main winding Lpri” includes a first secondary main winding Lpri1” and a second secondary main winding Lpri2”. The first secondary main winding Lpri1” includes a first auxiliary secondary main winding Lpri11” and a second auxiliary secondary main winding Lpri12”, for example, formed in the first coil layer 912 and the third coil layer 918, and wound around the first column 904 of the core 902. The first auxiliary secondary main winding Lpri11” and the second auxiliary secondary main winding Lpri12” are bifilar wound and connected in parallel. The second secondary main winding Lpri2” includes a third auxiliary secondary main winding Lpri21” and a fourth auxiliary secondary main winding Lpri22”, for example, formed in the first coil layer 932 and the third coil layer 938, and wound around the second column 906 of the core 902. The third auxiliary secondary main winding Lpri21” and the fourth auxiliary secondary main winding Lpri22” are bifilar wound and connected in parallel.

[0081] The first high-voltage auxiliary winding Lhv1" includes a first secondary high-voltage auxiliary winding Lhv11" and a second secondary high-voltage auxiliary winding Lhv12". The first secondary high-voltage auxiliary winding Lhv11" is wound around the first column 904 of the core 902 and is formed in the second coil layer 914. At the same time, the second secondary high-voltage auxiliary winding Lhv12" is wound around the second column 906 of the core 902 and is formed in the second coil layer 934. The first secondary high-voltage auxiliary winding Lhv11" and the second secondary high-voltage auxiliary winding Lhv12" are connected in parallel.

[0082] The first low-voltage secondary winding Llv1” includes a first secondary low-voltage secondary winding Llv11” and a second secondary low-voltage secondary winding Llv12”. The first secondary low-voltage secondary winding Llv11” is wound around the first cylinder 904 of the core 902, and the second secondary low-voltage secondary winding Llv12” is wound around the second cylinder 906 of the core 902. In addition, the first secondary low-voltage secondary winding Llv11” is implemented by metal slots 920 and 922, and the metal slots 920 and 922 are connected in series to produce a center point. Similarly, the second secondary low-voltage secondary winding Llv12” is implemented by metal slots 940 and 942. The metal slots 940 and 942 are connected in series to produce a center point. The first secondary low-voltage secondary winding Llv11” and the second secondary low-voltage secondary winding Llv12” are connected in parallel.

[0083] The transformer according to an embodiment of the present invention features multiple output ports connected to a single core. This transformer can charge multiple batteries and / or provide charging power to multiple loads or electronic devices simultaneously. It is worth noting that this transformer achieves high efficiency and low cost. Each load can be charged independently, making it a practical solution for a variety of applications.

[0084] In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. A transformer, characterized in that: include: A core (Core) having a first column (Leg) and a second column; a primary winding, at least part of which is wound around the first cylinder of the core, the primary winding comprising a first secondary primary winding, the first secondary primary winding comprising a first auxiliary secondary primary winding and a second auxiliary secondary primary winding, the first auxiliary secondary primary winding and the second auxiliary secondary primary winding being bifilar wound and connected in parallel; and A plurality of secondary windings, some of the secondary windings are wound around the first column of the core, and other of the secondary windings are wound around the second column of the core.

2. The transformer according to claim 1, characterized in that: The main winding further includes a second secondary main winding, which includes a third auxiliary secondary main winding and a fourth auxiliary secondary main winding. The third auxiliary secondary main winding and the fourth auxiliary secondary main winding are bifilar-wound and connected in parallel. The first secondary main winding is wound around the first column of the core, and the second secondary main winding is wound around the second column of the core.

3. The transformer according to claim 1, characterized in that: The auxiliary windings include a first high-voltage auxiliary winding and a first low-voltage auxiliary winding, at least part of the first high-voltage auxiliary winding is wound around the first column of the core, and at least part of the first low-voltage auxiliary winding is wound around the first column of the core.

4. The transformer according to claim 3, characterized in that: The auxiliary windings further include a second high-voltage auxiliary winding and a second low-voltage auxiliary winding, the first high-voltage auxiliary winding is wound around the first column of the core, the second high-voltage auxiliary winding is wound around the second column of the core, the first low-voltage auxiliary winding is wound around the first column of the core, and the second low-voltage auxiliary winding is wound around the second column of the core.

5. The transformer according to claim 4, characterized in that: The first low-voltage auxiliary winding includes a first secondary low-voltage auxiliary winding and a second secondary low-voltage auxiliary winding connected in series, and the second low-voltage auxiliary winding includes a third secondary low-voltage auxiliary winding and a fourth secondary low-voltage auxiliary winding connected in series.

6. The transformer according to claim 5, characterized in that: The first secondary low-voltage auxiliary winding to the fourth secondary low-voltage auxiliary winding are each realized by a metal slot body, the first secondary low-voltage auxiliary winding and the second secondary low-voltage auxiliary winding are arranged on the outside of the first secondary main winding, and the third secondary low-voltage auxiliary winding and the fourth secondary low-voltage auxiliary winding are arranged on the outside of the second secondary main winding.

7. The transformer according to claim 6, characterized in that: Wherein the first secondary low-voltage secondary winding to the fourth secondary low-voltage secondary winding each have an opening, one end of the first secondary low-voltage secondary winding is electrically connected to one end of the second secondary low-voltage secondary winding, and one end of the third secondary low-voltage secondary winding is electrically connected to one end of the fourth secondary low-voltage secondary winding.

8. The transformer according to claim 6, characterized in that: The metal trough system can be rigid or flexible.

9. The transformer according to claim 3, characterized in that: The first high-voltage auxiliary winding includes a first secondary high-voltage auxiliary winding and a second secondary high-voltage auxiliary winding, the first secondary high-voltage auxiliary winding is wound around the first column of the core, and the second secondary high-voltage auxiliary winding is wound around the second column of the core, and the first secondary high-voltage auxiliary winding and the second secondary high-voltage auxiliary winding are connected in parallel.

10. The transformer according to claim 3, characterized in that: The first low-voltage auxiliary winding includes a first secondary low-voltage auxiliary winding and a second secondary low-voltage auxiliary winding, the first secondary low-voltage auxiliary winding is wound around the first column of the core, and the second secondary low-voltage auxiliary winding is wound around the second column of the core, and the first secondary low-voltage auxiliary winding and the second secondary low-voltage auxiliary winding are connected in parallel.

11. The transformer according to claim 1, characterized in that: The secondary windings include a vehicle-to-load (V2L) secondary winding, at least part of the V2L secondary winding is wound around the first cylinder of the core, the V2L secondary winding includes a first secondary V2L secondary winding, the first secondary V2L secondary winding includes a first auxiliary secondary V2L secondary winding and a second auxiliary secondary V2L secondary winding, the first auxiliary secondary V2L secondary winding and the second auxiliary secondary V2L secondary winding are bifilar wound and connected in parallel.

12. The transformer according to claim 11, characterized in that: The V2L secondary winding further includes a second secondary V2L secondary winding, and the second secondary V2L secondary winding includes a third auxiliary secondary V2L secondary winding and a fourth auxiliary secondary V2L secondary winding. The third auxiliary secondary V2L secondary winding and the fourth auxiliary secondary V2L secondary winding are bifilar-wound and connected in parallel. The first secondary V2L secondary winding is wound around the first column of the core, and the second secondary V2L secondary winding is wound around the second column of the core.

13. The transformer according to claim 1, characterized in that: The core includes a first double-T structure and a second double-T structure, and the first double-T structure is opposite to the second double-T structure.

14. The transformer according to claim 13, characterized in that: There is an air gap between the first twin-T structure and the second twin-T structure, and the core is made of ferrite.

15. The transformer according to claim 13, characterized in that: There is no air gap between the first double-T structure and the second double-T structure, the core portion is made of ferrite, and the first column and the second column are made of iron power.

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