Vehicle-mounted integrated transformer device and automobile
By setting multiple symmetrical magnetic columns and windings on the magnetic core of the vehicle-mounted transformer device, alternating phase voltages are generated, and filtering and resonating through the output inductor, the existing vehicle-mounted transformer device has solved the problem of large volume and high cost, and the effect of compact design and cost reduction is achieved.
Patent Information
- Application Number
- CN202421455596.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-24
AI Technical Summary
Due to the separate production of devices, the existing vehicle-mounted transformer devices occupy a large volume, use a large amount of materials, and have a wide variety of inventory, resulting in high management costs and labor costs.
An in-vehicle integrated transformer device is designed to generate alternating phase voltages by setting multiple symmetrical magnetic columns and windings on the magnetic core, and filtering and resonating through the output inductor, effectively combining the transformer winding, the output inductor and the resonant inductor to reduce the overall volume occupied and production costs.
The compact design of the transformer device is realized, reducing production and management costs, while improving the performance and efficiency of the transformer.
Smart Images
Figure CN222826198U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a vehicle-mounted integrated transformer device and a vehicle. Background Art
[0002] In the prior art, the transformer transforms the voltage to charge the vehicle battery, and the vehicle battery is discharged through the DC power transformer. Conventional transformers and other devices need to be manufactured separately, and the overall volume is large; each device uses a magnetic core and material of a different shape, which increases the material usage, a wide variety of inventory, and high management costs. Since the devices need to be manufactured separately, each device requires an independent production line, equipped with more management and production personnel, and high labor costs and management costs. Utility Model Content
[0003] In view of this, an object of the embodiments of the present utility model is to provide a vehicle-mounted integrated transformer device and a vehicle, which can reduce the overall occupied volume of the transformer and other components and reduce production costs.
[0004] In a first aspect, an embodiment of the utility model provides a vehicle-mounted integrated transformer device, comprising:
[0005] Base;
[0006] A magnetic core, wherein the magnetic core comprises a first magnetic column, a second magnetic column and a third magnetic column, wherein the first magnetic column and the second magnetic column are symmetrically arranged with respect to the third magnetic column, the first magnetic column is provided with a first primary winding, the second magnetic column is provided with a second primary winding, the first primary winding is used to generate a first phase voltage, the second primary winding is used to generate a second phase voltage, the first phase voltage and the second phase voltage are generated alternately, the third magnetic column is provided with an output inductor, the output inductor is used to filter the first phase voltage and the second phase voltage, and the third magnetic column is used to generate a resonant inductor after amplifying leakage magnetic flux.
[0007] Optionally, the first primary winding includes a first primary winding, a first secondary winding and a second secondary winding, the first secondary winding is arranged inside the first primary winding, and the second secondary winding is arranged outside the first primary winding.
[0008] Optionally, the second primary winding includes a second primary winding, a third secondary winding and a fourth secondary winding, the third secondary winding is arranged inside the second primary winding, the fourth secondary winding is arranged outside the second primary winding, the end winding of the first primary winding is connected to the head winding of the second primary winding, and the first magnetic flux generated by the first primary winding and the second magnetic flux generated by the second primary winding cancel each other out.
[0009] Optionally, the first primary winding uses a first metal winding, the first secondary winding uses a first copper foil, and the second secondary winding uses a second copper foil, and the first copper foil and the second copper foil are used to generate the first phase voltage after induction of the first metal winding.
[0010] Optionally, the second primary winding uses a second metal winding, the third secondary winding uses a third copper foil, and the fourth secondary winding uses a fourth copper foil. The third copper foil and the fourth copper foil are used to generate the second phase voltage after induction of the second metal winding. The first metal winding and the second metal winding are connected end to end, and the first phase voltage and the second phase voltage are in opposite phases.
[0011] Optionally, the output inductor adopts a fifth copper foil, the fifth copper foil is sleeved on an output skeleton, and the output skeleton is sleeved on the third magnetic column.
[0012] Optionally, the first copper foil and the second copper foil are connected to the fifth copper foil via a first connecting sheet, and the third copper foil and the fourth copper foil are connected to the fifth copper foil via a second connecting sheet.
[0013] Optionally, a first air gap is provided on the third magnetic column, a first air gap gasket is provided in the first air gap, the first air gap is used to amplify leakage magnetic flux, a second air gap is provided on the first magnetic column, a third air gap is provided on the second magnetic column, and the third air gap and the second air gap are both smaller than the first air gap.
[0014] Optionally, the first primary winding also includes a first frame, the first secondary winding is sleeved on the first frame, the first frame is sleeved on the first magnetic column, and the second primary winding also includes a second frame, the third secondary winding is sleeved on the second frame, and the second frame is sleeved on the second magnetic column.
[0015] In a second aspect, an embodiment of the utility model provides a car, comprising the above-mentioned vehicle-mounted integrated transformer device.
[0016] The implementation of the utility model embodiment includes the following beneficial effects: The utility model embodiment provides a vehicle-mounted integrated transformer device, including: a base; a magnetic core, the magnetic core includes a first magnetic column, a second magnetic column and a third magnetic column, the first magnetic column and the second magnetic column are symmetrically arranged about the third magnetic column, the first magnetic column is provided with a first primary winding, the second magnetic column is provided with a second primary winding, the first primary winding is used to generate a first phase voltage, the second primary winding is used to generate a second phase voltage, the first phase voltage and the second phase voltage are alternately generated, the third magnetic column is provided with an output inductor, the output inductor is used to filter the first phase voltage and the second phase voltage, and the third magnetic column is used to generate a resonant inductor after amplifying the leakage magnetic flux. By arranging the primary winding on the first magnetic column and the second magnetic column to obtain an alternating transformer winding, and filtering through the output inductor on the third magnetic column, the third magnetic column simultaneously obtains a resonant inductor by amplifying the leakage inductance, and the transformer winding, the output inductor and the resonant inductor are effectively combined together without the need to be made separately, reducing the overall occupied volume of the transformer and other devices, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a vehicle-mounted integrated transformer device provided by an embodiment of the utility model;
[0018] Figure 2 It is another structural schematic diagram of a vehicle-mounted integrated transformer device provided by an embodiment of the utility model;
[0019] Figure 3 It is an exploded schematic diagram of a vehicle-mounted integrated transformer device provided by an embodiment of the utility model;
[0020] Figure 4 It is a circuit diagram of a vehicle-mounted integrated transformer device provided in an embodiment of the utility model.
[0021] Reference numerals: base 100, secondary electrical connection copper terminal 110, output inductor electrical connection copper terminal 120;
[0022] Magnetic core 200, first magnetic column 210, first primary winding 211, first copper foil 212, second copper foil 213, first insulating tape 214, first skeleton 215, third magnetic column 220, fifth copper foil 221, output skeleton 222, second magnetic column 230, second primary winding 231, third copper foil 232, fourth copper foil 233, second insulating tape 234, second skeleton 235. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, unless otherwise specified, "plurality" means two or more.
[0026] Reference Figure 1-3 The utility model embodiment provides a vehicle-mounted integrated transformer device, comprising:
[0027] Base 100;
[0028] A magnetic core 200, the magnetic core 200 includes a first magnetic column 210, a second magnetic column 230 and a third magnetic column 220, the first magnetic column 210 and the second magnetic column 230 are symmetrically arranged with respect to the third magnetic column 220, the first magnetic column 210 is provided with a first primary winding, the second magnetic column 230 is provided with a second primary winding, the first primary winding is used to generate a first phase voltage, the second primary winding is used to generate a second phase voltage, the first phase voltage and the second phase voltage are generated alternately, the third magnetic column 220 is provided with an output inductor, the output inductor is used to filter the first phase voltage and the second phase voltage, and the third magnetic column 220 is used to generate a resonant inductor after amplifying the leakage flux.
[0029] Specifically, the transformer, output inductor and resonant inductor are integrated on the base 100 at the same time, thereby greatly reducing the occupied volume of the transformer device, and can be purchased and manufactured in a unified manner, with low production cost. The first magnetic column 210 and the second magnetic column 230 on the base 100 are symmetrically arranged about the third magnetic column 220, and the first phase voltage is generated through the first primary winding, and the second phase voltage is generated through the second primary winding. The first phase voltage and the second phase voltage are generated alternately, that is, the first phase voltage and the second phase voltage are alternately supplied; at the same time, an output inductor is arranged on the third magnetic column 220, and the first phase voltage and the second phase voltage are filtered through the output inductor, and the resonant inductor is generated in the first magnetic column 210 and / or the second primary winding after the leakage magnetic flux is amplified by the third magnetic column 220, thereby effectively utilizing the leakage inductance generated by the leakage magnetic flux, and using the leakage inductance as the resonant inductance, thereby effectively utilizing the leakage inductance to improve the performance and efficiency of the transformer. The first magnetic column 210, the second magnetic column 230 and the third magnetic column 220 share a magnetic core 200, which can reduce the required space, make the transformer design more compact, reduce the use of separate magnetic cores 200, and reduce material costs and manufacturing costs; by magnetically integrating the DC main transformer (the first primary winding and the second primary winding), the output inductor and the resonant inductor, the loss of the magnetic core 200 is reduced, and the magnetic flux can be used more effectively, reducing the waste of magnetic flux; sharing the magnetic core 200 can reduce the overall thermal resistance, help dissipate heat, and improve thermal management.
[0030] In some optional embodiments, the first primary winding includes a first primary winding 211 , a first secondary winding and a second secondary winding, the first secondary winding is arranged inside the first primary winding 211 , and the second secondary winding is arranged outside the first primary winding 211 .
[0031] Specifically, refer to Figure 3 By placing secondary windings (i.e., the first secondary winding and the second secondary winding) on both the inner and outer layers of the first primary winding 211, the coupling area between the primary and secondary windings (i.e., between the first secondary winding and the first primary winding 211, and between the second secondary winding and the first primary winding 211) is increased, thereby improving the coupling efficiency of the transformer. By tightly surrounding the first primary winding 211 with the first secondary winding and the second secondary winding, the leakage of magnetic flux is reduced, thereby reducing the leakage inductance between the primary and secondary windings.
[0032] In some optional embodiments, the first primary winding 211 uses a first metal winding, the first secondary winding uses a first copper foil 212, and the second secondary winding uses a second copper foil 213. The first copper foil 212 and the second copper foil 213 are used to generate the first phase voltage after induction of the first metal winding.
[0033] Specifically, the first secondary winding uses the first copper foil 212, and the second secondary winding uses the second copper foil 213, and the first copper foil 212 and the second copper foil 213 have the same structure. The first copper foil 212 and the second copper foil 213 have good thermal conductivity and can be used as the thermal conductivity medium of the first primary winding 211 to help dissipate heat and improve the thermal performance of the transformer. At the same time, the first copper foil 212 and the second copper foil 213 can play a shielding role, reduce the electromagnetic interference between the primary and the secondary, and improve the electromagnetic compatibility of the transformer; the use of the first copper foil 212 and the second copper foil 213 can simplify the winding process, because the first copper foil 212 and the second copper foil 213 are wider, which can reduce the number of joints during winding and improve production efficiency; the use of the first copper foil 212 and the second copper foil 213 can improve the response of the transformer to load changes, because the first copper foil 212 and the second copper foil 213 have a low resistance, which helps to reduce voltage fluctuations caused by load changes.
[0034] In some optional embodiments, the second primary winding includes a second primary winding 231, a third secondary winding and a fourth secondary winding, the third secondary winding is arranged inside the second primary winding 231, the fourth secondary winding is arranged outside the second primary winding 231, the end winding of the first primary winding 211 is connected to the head winding of the second primary winding 231, and the first magnetic flux generated by the first primary winding 211 and the second magnetic flux generated by the second primary winding 231 offset each other.
[0035] Specifically, refer to Figure 3 The second primary winding and the first primary winding adopt the same structural setting, the third secondary winding is arranged inside the second primary winding 231, and the fourth secondary winding is arranged outside the second primary winding 231, so as to increase the coupling area between the third secondary winding and the second primary winding 231, and between the fourth secondary winding and the second primary winding 231, improve the coupling efficiency of the transformer, and the third secondary winding and the fourth secondary winding tightly surround the second primary winding 231, thereby reducing the leakage of the magnetic flux, thereby reducing the leakage inductance of the second primary winding. The end winding of the first primary winding 211 is connected to the head winding of the second primary winding 231, so that it can be wound in an integrated manner. By setting the winding directions of the first primary winding 211 and the second primary winding 231, the first magnetic flux generated by the first primary winding 211 and the second magnetic flux generated by the second primary winding 231 offset each other in the magnetic core 200, thereby reducing the magnetic flux density in the magnetic core 200. Reducing the magnetic flux density helps to reduce the hysteresis loss and eddy current loss of the magnetic core 200, thereby improving the efficiency and performance of the transformer, reducing the input and output current ripples, and improving the transient response. The magnetic flux density of the integrated transformer device is reduced, so the cross-sectional area of the magnetic core 200 can be reduced, further reducing the volume of the transformer device.
[0036] In some optional embodiments, the second primary winding 231 uses a second metal winding, the third secondary winding uses a third copper foil 232, and the fourth secondary winding uses a fourth copper foil 233. The third copper foil 232 and the fourth copper foil 233 are used to generate the second phase voltage through induction of the second metal winding, the first metal winding and the second metal winding are connected end to end, and the first phase voltage and the second phase voltage are in opposite phases.
[0037] Specifically, refer to Figure 3 , the second primary winding 231 and the first primary winding 211 are made of the same material. The second primary winding 231 is wound with a second metal winding, the third secondary winding is made of a third copper foil 232, and the fourth secondary winding is made of a fourth copper foil 233. The third copper foil 232 and the fourth secondary winding have the same structure. The third copper foil 232 and the fourth copper foil 233 generate a second phase voltage after being induced by the second metal winding. The first phase voltage and the second phase voltage are opposite in phase and are generated alternately. The first phase voltage and the second phase voltage can: balance the voltage at both ends of the load and reduce the DC component; offset common mode noise, thereby reducing electromagnetic interference; achieve soft switching, reduce switching losses, and improve efficiency, etc.
[0038] In some optional embodiments, the first metal winding and the second metal winding are Litz wires, specifically film-wrapped Litz wires. The use of film-wrapped Litz wires reduces the losses caused by skin effect and proximity effect in the transformer, and improves the insulation strength and heat resistance of the transformer.
[0039] In some optional embodiments, the output inductor uses a fifth copper foil 221 , the fifth copper foil 221 is sleeved on an output skeleton 222 , and the output skeleton 222 is sleeved on the third magnetic column 220 .
[0040] Specifically, refer to Figure 3 Using the fifth copper foil 221 as the output inductor can reduce resistance loss and improve the efficiency of the transformer. The softness and plasticity of the fifth copper foil 221 make it easier to wind, which helps to improve production efficiency. By winding the fifth copper foil 221 on the output skeleton 222, the position of the fifth copper foil 221 is fixed to ensure the stability of the output inductor.
[0041] In some optional embodiments, the first copper foil 212 and the second copper foil 213 are connected to the fifth copper foil 221 through a first connecting sheet, and the third copper foil 232 and the fourth copper foil 233 are connected to the fifth copper foil 221 through a second connecting sheet.
[0042] Specifically, refer to Figure 3, the first copper foil 212 and the second copper foil 213 are connected to the fifth copper foil 221 through the first connecting piece, so that the first phase voltage is transmitted to the fifth copper foil 221, and is output for use after filtering through the fifth copper foil 221. The third copper foil 232 and the fourth copper foil 233 are connected to the fifth copper foil 221 through the second connecting piece, so that the second phase voltage is transmitted to the fifth copper foil 221, and is output for use after filtering through the fifth copper foil 221. The first connecting piece simultaneously connects the first copper foil 212 and the second copper foil 213 to the fifth copper foil 221, and the second connecting piece simultaneously connects the third copper foil 232 and the fourth copper foil 233 to the fifth copper foil 221, thereby reducing the use of materials, reducing production costs and occupying volume.
[0043] In some optional embodiments, a first insulating tape 214 is disposed outside the second copper foil 213 , and a second insulating tape 234 is disposed outside the fourth copper foil 233 , thereby ensuring insulation between the first primary winding and the second primary winding.
[0044] In some optional embodiments, a first air gap is provided on the third magnetic column 220, a first air gap gasket is provided in the first air gap, the first air gap is used to amplify leakage magnetic flux, a second air gap is provided on the first magnetic column 210, and a third air gap is provided on the second magnetic column 230, and the third air gap and the second air gap are both smaller than the first air gap.
[0045] Specifically, refer to Figure 3 , by setting a first air gap on the third magnetic column 220, and setting a first air gap gasket between the first air gaps to adjust the size of the first air gap; by adjusting the size of the first air gap, the magnetic flux passing through the magnetic core 200 is controlled. When the first air gap increases, the leakage magnetic flux through the third magnetic column 220 increases, so that the leakage inductance generated by the leakage magnetic flux increases, and the increased leakage inductance is used as the corresponding resonant inductance, so the corresponding first air gap size can be adjusted according to the specific required resonant inductance size. The existence of the second air gap and the third air gap reduces the total magnetic permeability of the magnetic circuit, increases the saturation current, and thus increases the ability to store energy. The third air gap and the second air gap are both smaller than the first air gap, which can make the magnetic flux more evenly distributed in the magnetic core 200, reduce the excessive concentration of the magnetic flux in certain areas, and thus reduce the local saturation phenomenon of the magnetic core 200. Similarly, the second air gap and the third air gap are also provided with corresponding air gap gaskets, so the specific sizes of the corresponding third air gap and the second air gap can be optimized according to different working conditions and load characteristics to meet the corresponding needs, and the specific size is not limited here.
[0046] In some optional embodiments, the first primary winding also includes a first skeleton 215, the first secondary winding is sleeved on the first skeleton 215, the first skeleton 215 is sleeved on the first magnetic column 210, and the second primary winding also includes a second skeleton 235, the third secondary winding is sleeved on the second skeleton 235, and the second skeleton 235 is sleeved on the second magnetic column 230.
[0047] Specifically, refer to Figure 3 The first primary winding is sleeved on the first magnetic column 210 through the first frame 215, so as to stabilize the position of the first primary winding. Specifically, the first copper foil 212 is sleeved on the first frame 215, so as to stabilize the first copper foil 212, the first metal winding and the second copper foil 213. Similarly, the second primary winding is sleeved on the second magnetic column 230 through the second frame 235, so as to stabilize the position of the second primary winding. Specifically, the third copper foil 232 is sleeved on the second frame 235, so as to stabilize the third copper foil 232, the second metal winding and the fourth copper foil 233.
[0048] In some optional embodiments, the output inductor winding is stamped into a spring-shaped coil using the fifth copper foil 221, which is sleeved on the third magnetic column 220 in the middle of the magnetic core 200. The first copper foil 212 on the first magnetic column 210 of the magnetic core 200 is wound around one end of the second copper foil 213, and one end of the third copper foil 232 and the fourth copper foil 233 on the second magnetic column 230 of the magnetic core 200 are welded together with one end of the output inductor (to form an electrical connection); the corresponding lead-out end of the winding passes through the base 100 and is welded with a terminal copper bar, and after adding the copper bar, it is convenient to connect and lock with the PCB circuit to form an electrical connection. Specifically, the first copper foil 212 and the second copper foil 213 of the first primary winding are connected to the corresponding PCB board through the electrical connection copper terminal 110, and the fifth copper foil 221 is connected to the corresponding PCB board through the output inductor electrical connection copper terminal 120.
[0049] In some optional embodiments, referring to Figure 4 , the circuit diagram of the vehicle-mounted integrated transformer device adopts the PSFB (Phase Shifted Full Bridge) topology, which has the advantages of high efficiency, high power density and high reliability. It can be seen from the figure that the first primary winding 211 (P1) of the first primary winding and the secondary winding S1 generate a first phase voltage, and the first phase voltage is filtered and output through the output inductor Lout; the second primary winding 231 (P2) of the second primary winding and the secondary winding S2 generate a second phase voltage, and the second phase voltage is filtered and output through the output inductor Lout.
[0050] The implementation of the utility model embodiment includes the following beneficial effects: The utility model embodiment provides a vehicle-mounted integrated transformer device, including: a base 100; a magnetic core 200, the magnetic core 200 includes a first magnetic column 210, a second magnetic column 230 and a third magnetic column 220, the first magnetic column 210 and the second magnetic column 230 are symmetrically arranged with respect to the third magnetic column 220, the first magnetic column is provided with a first primary winding, the second magnetic column 230 is provided with a second primary winding, the first primary winding is used to generate a first phase voltage, the second primary winding is used to generate a second phase voltage, the first phase voltage and the second phase voltage are generated alternately, the third magnetic column 220 is provided with an output inductor, the output inductor is used to filter the first phase voltage and the second phase voltage, and the third magnetic column 220 is used to generate a resonant inductor after amplifying the leakage magnetic flux. A transformer winding for alternating voltage transformation is obtained by setting a primary winding on the first magnetic column 210 and the second magnetic column 230, and filtering is performed through the output inductor on the third magnetic column 220. The third magnetic column 220 also obtains a resonant inductor by amplifying the leakage inductance, thereby effectively combining the transformer winding, the output inductor and the resonant inductor together, reducing the overall occupied volume of the transformer and other devices and reducing the production cost.
[0051] In a second aspect, an embodiment of the utility model provides a car, comprising the above-mentioned vehicle-mounted integrated transformer device.
[0052] It can be seen that the contents of the above-mentioned vehicle-mounted integrated transformer device embodiment are all applicable to the present automobile embodiment, the functions specifically implemented by the present automobile embodiment are the same as those of the above-mentioned vehicle-mounted integrated transformer device embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned vehicle-mounted integrated transformer device embodiment.
[0053] In the description of this specification, the description with reference to the term "in a specific embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0054] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A vehicle-mounted integrated transformer device, characterized in that: include: Base; A magnetic core, wherein the magnetic core comprises a first magnetic column, a second magnetic column and a third magnetic column, wherein the first magnetic column and the second magnetic column are symmetrically arranged with respect to the third magnetic column, the first magnetic column is provided with a first primary winding, the second magnetic column is provided with a second primary winding, the first primary winding is used to generate a first phase voltage, the second primary winding is used to generate a second phase voltage, the first phase voltage and the second phase voltage are generated alternately, the third magnetic column is provided with an output inductor, the output inductor is used to filter the first phase voltage and the second phase voltage, and the third magnetic column is used to generate a resonant inductor after amplifying leakage magnetic flux.
2. The vehicle-mounted integrated transformer device according to claim 1, characterized in that: The first primary winding includes a first primary winding, a first secondary winding and a second secondary winding. The first secondary winding is arranged inside the first primary winding, and the second secondary winding is arranged outside the first primary winding.
3. The vehicle-mounted integrated transformer device according to claim 2, characterized in that: The second primary winding includes a second primary winding, a third secondary winding and a fourth secondary winding. The third secondary winding is arranged inside the second primary winding, and the fourth secondary winding is arranged outside the second primary winding. The end winding of the first primary winding is connected to the head winding of the second primary winding. The first magnetic flux generated by the first primary winding and the second magnetic flux generated by the second primary winding offset each other.
4. The vehicle-mounted integrated transformer device according to claim 3, characterized in that: The first primary winding uses a first metal winding, the first secondary winding uses a first copper foil, and the second secondary winding uses a second copper foil. The first copper foil and the second copper foil are used to generate the first phase voltage through induction of the first metal winding.
5. The vehicle-mounted integrated transformer device according to claim 4, characterized in that: The second primary winding uses a second metal winding, the third secondary winding uses a third copper foil, and the fourth secondary winding uses a fourth copper foil. The third copper foil and the fourth copper foil are used to generate the second phase voltage after induction by the second metal winding. The first metal winding and the second metal winding are connected end to end, and the first phase voltage and the second phase voltage are in opposite phases.
6. The vehicle-mounted integrated transformer device according to claim 5, characterized in that: The output inductor adopts a fifth copper foil, the fifth copper foil is sleeved on an output frame, and the output frame is sleeved on the third magnetic column.
7. The vehicle-mounted integrated transformer device according to claim 6, characterized in that: The first copper foil and the second copper foil are connected to the fifth copper foil through a first connecting sheet, and the third copper foil and the fourth copper foil are connected to the fifth copper foil through a second connecting sheet.
8. The vehicle-mounted integrated transformer device according to claim 1, characterized in that: A first air gap is provided on the third magnetic column, a first air gap gasket is provided in the first air gap, the first air gap is used to amplify leakage magnetic flux, a second air gap is provided on the first magnetic column, a third air gap is provided on the second magnetic column, and the third air gap and the second air gap are both smaller than the first air gap.
9. The vehicle-mounted integrated transformer device according to claim 3, characterized in that: The first primary winding also includes a first frame, the first secondary winding is sleeved on the first frame, and the first frame is sleeved on the first magnetic column. The second primary winding also includes a second frame, the third secondary winding is sleeved on the second frame, and the second frame is sleeved on the second magnetic column.
10. An automobile, characterized in that: It comprises the vehicle-mounted integrated transformer device as described in any one of claims 1-9.