Transformer and application system thereof

Abstract

The invention relates to a transformer and an application system thereof, which are characterized in that a plurality of pairs of primary windings and secondary windings are adopted for voltage transformation, so that the turn ratio between the winding pairs is reduced, the voltage stress borne by the secondary windings of the transformer is reduced, the voltage loss of winding coils is reduced, and the fault probability of the transformer is reduced. And the service life of the transformer is prolonged. Furthermore, two pairs of primary windings and secondary windings are integrated on one magnetic core, and meanwhile, the two primary windings are wound reversely, so that when the transformer works, magnetic flux generated by the two primary windings can generate a magnetic flux loop in the same direction on a closed magnetic circuit of the magnetic core; therefore, magnetic fluxes flowing through the two primary windings can be mutually overlapped, on the premise that the number of turns of the windings is halved and a magnetic core is halved, the boosting effect and the stress reducing effect which are the same as those of series-parallel connection of two transformers are generated, the cost, the weight and the size of the transformers are reduced, and the efficiency of the transformers is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer and an application system. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to convert the input voltage or current into an output. It consists of one or more pairs of insulated wires wound around a magnetic core. The winding connected to the input circuit is generally called the primary winding or primary winding, while the winding connected to the output circuit is generally called the secondary winding or secondary winding.

[0003] At present, in order to achieve input voltage boost within a wider voltage input range, a step-up transformer is usually used to achieve input voltage boost. In order to achieve high voltage output within a wider voltage input range, the primary and secondary turns ratio of the step-up transformer is usually large, which leads to a significant increase in the voltage stress on the secondary side of the transformer when high voltage is input, which easily causes the winding insulation layer to age or even break down, increasing the risk of circuit failure.

[0004] In order to reduce the transformer turns ratio and stress when a wide range of voltage input is applied, the existing technology uses multiple transformers in series and parallel to obtain high voltage output, so that the primary-to-secondary turns ratio of each transformer is reduced. However, this method requires the introduction of multiple transformers in the circuit, which not only increases the circuit system cost and weight, but also reduces the system efficiency, and is subject to many limitations in actual application scenarios. Summary of the invention

[0005] The purpose of this application is to improve the existing transformer and circuit that realizes wide-range voltage input and high-voltage output, so that the voltage stress on the secondary side of the transformer can be reduced, the transformer loss and failure probability can be reduced, and the reliability and service life of the transformer can be improved without introducing multiple transformers and maintaining the low cost of the system.

[0006] In order to achieve the above object, the present invention provides a transformer, comprising a magnetic core, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding, wherein:

[0007] The magnetic core comprises a first magnetic core structure and a second magnetic core structure, the first magnetic core structure and the second magnetic core structure are connected to form a closed magnetic circuit, and the first magnetic core structure and the second magnetic core structure have the same size, shape and magnetic resistance;

[0008] The first primary winding is wound on the first magnetic core structure, the second primary winding is wound on the second magnetic core structure, the first primary winding and the second primary winding are connected in parallel, two common ends of the first primary winding and the second primary winding serve as the first input end and the second input end of the transformer respectively, and the first primary winding and the second primary winding are wound in opposite directions;

[0009] The first secondary winding is wound on the first magnetic core structure, and the second secondary winding is wound on the second magnetic core structure;

[0010] The two output ends of the first secondary winding serve as the first output end and the second output end of the transformer, respectively, for outputting the first output voltage of the transformer;

[0011] The two output ends of the second secondary winding serve as the third output end and the fourth output end of the transformer respectively, and are used to output the second output voltage of the transformer.

[0012] The above-mentioned transformer integrates two pairs of transformer windings on a transformer core by optimizing the magnetic core structure and the transformer magnetic circuit, and the primary windings of the two pairs of transformer windings are wound in reverse, so that when the transformer is working, the magnetic flux generated by the two pairs of transformer windings can pass through the transformer core to form the same loop, thereby realizing the superposition of the magnetic flux flowing through each pair of windings, and the total magnetic flux of each pair of windings is enhanced to twice the original winding turns ratio. Finally, without introducing multiple transformers, the turns ratio is reduced by increasing the transformer windings, thereby achieving the technical effect of reducing the stress on the circuit. In addition, when the number of winding pairs is the same, compared with the method of connecting multiple transformers in series and parallel in the prior art, the transformer provided by the above scheme can achieve the same boosting effect and stress reduction effect under the premise of halving the number of winding turns and halving the magnetic core, thereby reducing the cost, weight and size of the transformer and improving the efficiency of the transformer.

[0013] Furthermore, in a possible implementation manner, the first magnetic core structure is a U-shaped magnetic core structure, an arc-shaped magnetic core structure, or an angular magnetic core structure.

[0014] It should be noted that no matter what shape the magnetic core structure is, as long as they can provide a continuous magnetic flux path that is sufficient to support the magnetic flux generated by the two primary windings to flow through it to form a closed magnetic flux loop, thereby achieving the superposition of the total magnetic flux flowing through the two primary windings, they should be considered to be able to realize a transformer provided by the above embodiment, without limitation.

[0015] The present invention further provides a transformer application system, which uses the transformer described in any of the above possible implementations, including:

[0016] A transformer, used for receiving an AC voltage input, boosting the AC voltage and outputting it as a first output voltage of the transformer and a second output voltage of the transformer;

[0017] The rectifier circuit is used to receive the first output voltage of the transformer and the second output voltage of the transformer, convert the first output voltage of the transformer and the second output voltage of the transformer into a direct current voltage in series and then output it.

[0018] Further, in a possible implementation, the transformer application system further includes an input power supply, a first capacitor and a bridge switch circuit, wherein the first input end and the second input end of the bridge switch circuit are electrically connected to the positive electrode and the negative electrode of the input power supply, respectively, and the two ends of the first capacitor are electrically connected to the first input end and the second input end of the bridge switch circuit, respectively, wherein:

[0019] The bridge switch circuit receives a DC voltage input from the input power source, converts the DC voltage into an AC voltage, and then outputs the AC voltage to the transformer.

[0020] Furthermore, in a possible implementation, the bridge switch circuit includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, wherein:

[0021] The positive electrode of the input power supply is connected to the input end of the first switch tube and the input end of the third switch tube respectively;

[0022] The output end of the first switch tube is connected to the input end of the second switch tube;

[0023] The output end of the third switch tube is connected to the input end of the fourth switch tube;

[0024] The output end of the second switch tube and the output end of the fourth switch tube are respectively connected to the negative electrode of the input power supply;

[0025] The common end of the first switch tube and the second switch tube serves as the first output end of the bridge switch circuit;

[0026] The common end of the third switch tube and the fourth switch tube serves as the second output end of the bridge switch circuit;

[0027] The first output terminal of the bridge switch circuit is electrically connected to the first input terminal of the transformer;

[0028] The second output end of the bridge switch circuit is electrically connected to the second input end of the transformer.

[0029] In this implementation, the bridge switch circuit converts the DC input voltage into a high-frequency AC voltage output by alternately conducting four switch tubes, thereby reducing energy loss and being suitable for wide-range, high-voltage DC voltage input.

[0030] Further, in a possible implementation, the rectifier circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode and an eighth diode, wherein:

[0031] An anode of the first diode and a cathode of the second diode are connected to form a first node, and the first node is connected to a first output terminal of the transformer;

[0032] The anode of the third diode is connected to the cathode of the fourth diode to form a second node, and the second node is connected to the second output terminal of the transformer;

[0033] The anode of the fifth diode is connected to the cathode of the sixth diode to form a third node, and the third node is connected to the third output terminal of the transformer;

[0034] The anode of the seventh diode is connected to the cathode of the eighth diode to form a fourth node, and the fourth node is connected to the fourth output terminal of the transformer;

[0035] A common end of the second diode and the fourth diode is connected to a common end of the fifth diode and the seventh diode;

[0036] The cathode of the first diode is connected to the cathode of the third diode to form a fifth node, and the fifth node is connected to the first output end of the rectifier circuit;

[0037] An anode of the sixth diode is connected to an anode of the eighth diode to form a sixth node, and the sixth node is connected to the second output end of the rectifier circuit.

[0038] In this implementation, two bridge rectifier circuits are connected in series and integrated into one rectifier circuit, wherein the two bridge rectifier circuits are respectively connected to the first secondary winding of the transformer and the second secondary winding of the transformer, so as to rectify the first output voltage output by the first secondary winding and the second output voltage output by the second secondary winding, respectively, and then the rectified voltages of the two bridge rectifier circuits are superimposed in series to obtain a DC voltage output after series conversion, thereby realizing the re-series superposition of the two low output voltages divided by the transformer into a high output voltage.

[0039] Furthermore, in a possible implementation, the system also includes a filtering circuit, which is used to receive a DC voltage input from the rectifier circuit and output the DC voltage after filtering.

[0040] Furthermore, in a possible implementation, the filter circuit includes a first inductor and a second capacitor, wherein:

[0041] The first end of the first inductor is electrically connected to the first output end of the rectifier circuit;

[0042] The first end of the second capacitor serves as the ground end of the filter circuit and is electrically connected to the second output end of the rectifier circuit;

[0043] A common end of the first inductor and the second capacitor serves as an output end of the filter circuit.

[0044] In this implementation, an LC filter circuit is formed by an inductor and a capacitor to filter out noise and interference in the DC voltage input by the rectifier circuit, thereby obtaining a smooth and stable DC voltage.

[0045] A transformer and application system provided by the present invention have at least the following advantages compared with the prior art:

[0046] First, by using multiple pairs of primary windings and secondary windings for voltage transformation, the turns ratio between winding pairs is reduced, the voltage stress on the secondary winding of the transformer is reduced, the voltage loss of the winding coil is reduced, the failure probability of the transformer is reduced, and the service life of the transformer is increased.

[0047] Second, by integrating two pairs of primary windings and secondary windings on a magnetic core and winding the two primary windings in opposite directions, when the transformer is working, the magnetic flux generated by the two primary windings can generate a magnetic flux loop in the same direction on the closed magnetic circuit of the magnetic core, so that the magnetic flux flowing through the two primary windings can be superimposed on each other, achieving the same boosting effect and stress reduction effect as two transformers connected in series and parallel with half the number of winding turns and half the magnetic core, thereby reducing the cost, weight and size of the transformer and improving the efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic structural diagram of a transformer provided by an embodiment of the present invention;

[0049] Figure 2 is a structural schematic diagram of a transformer application system provided by an embodiment of the present invention;

[0050] Figure 3 is a structural schematic diagram of another transformer application system provided by an embodiment of the present invention;

[0051] Wherein: 100, transformer; 110, bridge switch circuit; 120, rectifier circuit; 130, filter circuit. DETAILED DESCRIPTION

[0052] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0053] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0054] In order to reduce the voltage stress on the secondary side of the transformer when the transformer has high voltage input and high voltage output, the prior art connects multiple transformers with a smaller turn ratio than the original transformer in series and parallel, splits the high voltage input into multiple low voltage inputs, transforms them into multiple low voltage outputs, and then connects them in series into high voltage outputs, thereby achieving the original transformer boosting effect while reducing the voltage stress on the transformer. The disadvantage of this method is that multiple transformers are introduced into the transformer circuit, which increases the cost, weight and size of the circuit system, and reduces the voltage conversion efficiency of the transformer circuit, which is subject to many limitations in actual application scenarios.

[0055] In order to solve the problems of the prior art, referring to Figure 1 , an embodiment of the present invention provides a transformer 100, comprising a magnetic core, a first primary winding P1, a second primary winding P2, a first secondary winding S1 and a second secondary winding S2, wherein:

[0056] The magnetic core comprises a first magnetic core structure and a second magnetic core structure, the first magnetic core structure and the second magnetic core structure are connected to form a closed magnetic circuit, and the first magnetic core structure and the second magnetic core structure have the same size, shape and magnetic resistance;

[0057] The first primary winding P1 is wound on the first magnetic core structure, and the second primary winding P2 is wound on the second magnetic core structure. The first primary winding P1 and the second primary winding P2 are connected in parallel. Two common ends of the first primary winding P1 and the second primary winding P2 serve as the first input end and the second input end of the transformer respectively. The first primary winding P1 and the second primary winding P2 are wound in opposite directions.

[0058] The first secondary winding S1 is wound on the first magnetic core structure, and the second secondary winding S2 is wound on the second magnetic core structure;

[0059] The two output ends of the first secondary winding S1 serve as the first output end and the second output end of the transformer respectively, for outputting the first output voltage of the transformer;

[0060] The two output ends of the second secondary winding S2 serve as the third output end and the fourth output end of the transformer respectively, and are used to output the second output voltage of the transformer.

[0061] Referring to the transformer made in the above embodiment, Figure 1 As shown, when receiving an AC voltage input, since the first primary winding P1 and the second primary winding P2 are wound in opposite directions, one winding is wound in a clockwise direction and the other winding is wound in a counterclockwise direction, according to Ampere's law, the two primary windings will generate magnetic flux loops in the same direction in the closed magnetic circuit formed by the same magnetic core. Therefore, for the first primary winding P1 and the second primary winding P2, the total magnetic flux flowing through them will be superimposed on each other when they are working. Assume

[0062] The number of turns of the first primary winding P1 and the second primary winding P2 are both N1, the magnetic resistance is both R, and the current flowing through the first primary winding P1 and the second primary winding P2 is both i. Then the magnetic flux ∏1 generated by the first primary winding P1 is expressed as follows:

[0063]

[0064] The magnetic flux ∏2 generated by the second primary winding P2 is expressed as follows:

[0065]

[0066] At this time, the total magnetic flux flowing through the first primary winding P1 is P1 As shown in formula 3 below:

[0067] ∏ P1 = ∏1 + ∏2 = 2 ∏ (Formula 3) The total magnetic flux ∏ flowing through the second primary winding P2 P2 As shown in Formula 4 below:

[0068] ∏ P2 =∏1+∏2=2∏(Formula 4)

[0069] In order to more intuitively reflect the technical effect of the above embodiment, as a comparison, a prior art is now preset for connecting two transformers in parallel to achieve voltage stress reduction. Assuming that the number of turns of the primary windings of the two transformers in the prior art is N1, the magnetic resistance is R, and the current flowing through the two primary windings is i, the magnetic fluxes ∏3 and ∏4 generated by the primary windings of the two transformers are respectively shown in the following equations 5 and 6:

[0070]

[0071] Since the magnetic flux generated by the two primary windings of the transformers in the prior art flows through the magnetic cores of the two transformers respectively, generating two independent magnetic flux loops, the magnetic flux flowing through the two primary windings of the transformers do not interfere with each other. From Equations 5 and 6, it can be obtained that the total magnetic flux flowing through the two primary windings is ∏ respectively.

[0072] It can be seen that the transformer provided by the embodiment of the present invention, when the number of windings used and the total number of winding turns are the same as those of a prior art that connects two transformers in parallel to achieve voltage stress reduction, the total magnetic flux flowing through each primary winding during operation is twice that of the prior art, that is, the transformer provided by the embodiment of the present invention has a voltage boosting capacity that is twice that of the prior art when the same number of coils is used and one magnetic core is reduced. Similarly, it can be seen that the transformer provided by the embodiment of the present invention can achieve the same voltage boosting effect as the prior art when the number of coils is reduced by half and the number of magnetic cores is reduced by half.

[0073] More specifically, compared with the prior art that uses a single transformer for boosting, the embodiment of the present invention has more winding pairs of primary windings and secondary windings while achieving the same voltage boosting effect, and the turns ratio of each pair of primary windings and secondary windings is smaller than that of the prior art that uses a single transformer for boosting. Therefore, the transformer provided by the embodiment of the present invention can still achieve the same technical effect of reducing transformer voltage stress as the prior art of connecting two transformers in parallel.

[0074] In some embodiments, the first magnetic core structure of the transformer 100 may be a U-shaped magnetic core structure, an arc-shaped magnetic core structure, or an angular magnetic core structure. Specifically, no matter what shape the magnetic core structure is, as long as it can provide a continuous magnetic flux path, sufficient to support the magnetic flux generated by the two primary windings to flow through it to form a closed magnetic flux loop, thereby achieving the superposition of the total magnetic flux flowing through the two primary windings, it should be considered that it can achieve a transformer 100 provided by the above embodiment, and this is not limited.

[0075] like Figure 2 As shown, an embodiment of the present invention provides a schematic diagram of the structure of a transformer application system, using a transformer as described in any of the above embodiments, including an input power supply DC, a first capacitor C1, a bridge switch circuit 110, a transformer 100, a rectifier circuit 120 and a filter circuit 130, wherein:

[0076] The first input terminal and the second input terminal of the bridge switch circuit 110 are electrically connected to the positive electrode and the negative electrode of the input power supply DC respectively, and the two ends of the first capacitor C1 are electrically connected to the first input terminal and the second input terminal of the bridge switch circuit 110 respectively;

[0077] The bridge switch circuit 110 receives a DC voltage input from the input power source, converts the DC voltage into an AC voltage, and then outputs the AC voltage to the transformer 100;

[0078] The transformer 100 is used to receive an AC voltage input from a bridge switch circuit 110, and boost the AC voltage to output as a first output voltage of the transformer and a second output voltage of the transformer;

[0079] The rectifier circuit 120 is used to receive the first output voltage of the transformer and the second output voltage of the transformer, convert the first output voltage of the transformer and the second output voltage of the transformer into a DC voltage in series and then output it;

[0080] The filter circuit 130 is used to receive the DC voltage input from the rectifier circuit 120 and output the DC voltage after filtering.

[0081] In some embodiments, the bridge switching circuit 110 can be a half-bridge circuit, a full-bridge circuit, and a multi-level bridge circuit, and the bridge switching circuit 110 can also be called an inverter; the rectifier circuit 120 can be a full-wave rectifier circuit, a full-bridge rectifier circuit, etc., which can realize the conversion of the first output voltage of the transformer and the second output voltage of the transformer into a DC voltage in series and then output; the filter circuit 130 can be a capacitor filter circuit, an inductor filter circuit, an RC filter circuit, or an LC filter circuit.

[0082] like Figure 3 As shown, in some embodiments, the bridge switch circuit 110 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4, wherein:

[0083] The positive electrode of the input power supply is connected to the input end of the first switch tube Q1 and the input end of the third switch tube Q3 respectively;

[0084] The output end of the first switch tube Q1 is connected to the input end of the second switch tube Q2;

[0085] The output end of the third switch tube Q3 is connected to the input end of the fourth switch tube Q4;

[0086] The output end of the second switch tube Q2 and the output end of the fourth switch tube Q4 are respectively connected to the negative electrode of the input power supply;

[0087] The common end of the first switch tube Q1 and the second switch tube Q2 serves as the first output end of the bridge switch circuit 110;

[0088] The common end of the third switch tube Q3 and the fourth switch tube Q4 serves as the second output end of the bridge switch circuit 110;

[0089] The first output terminal of the bridge switch circuit is electrically connected to the first input terminal of the transformer 100;

[0090] The second output terminal of the bridge switch circuit is electrically connected to the second input terminal of the transformer 100 .

[0091] The above Figure 3 In a transformer application system shown, when the first switch tube Q1 is turned on, the second switch tube Q2 is turned off, the third switch tube Q3 is turned off, and the fourth switch tube Q4 is turned on; when the first switch tube Q1 is turned off, the second switch tube Q2 is turned on, the third switch tube Q3 is turned on, and the fourth switch tube Q4 is turned off.

[0092] Among them, the on and off of the above-mentioned first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 can be controlled by a preset controller, or by other control units, or by a control signal, for example, by adjusting the duty cycle of the PWM control signal by the control chip to adjust the on and off of the switch tube, which is not limited in the embodiment of the present application. The above-mentioned Q1, Q2, Q3 and Q4 can be triodes and MOS tubes, etc. The controller can control the control end of the switch tube, that is, the level of the base of the triode or the gate of the MOS tube to control the on or off of the switch tube.

[0093] It should be noted that, for the switch tube of the PNP type transistor, the control end of the switch tube is the base (B pole), the input end is the emitter (E pole), and the output end is the collector (C pole); for the switch tube of the NPN type transistor, the control end of the switch tube is the base (B pole), the input end is the collector (C pole), and the output end is the emitter (E pole); for the N-channel MOS tube, the control end of the switch tube is the gate (G pole), the input end is the drain (D pole), and the output end is the source (S pole); for the P-channel MOS tube, the control end of the switch tube is the gate (G pole), the input end is the source (S pole), and the output end is the drain (D pole).

[0094] Specifically, the above Figure 3 In the transformer application system shown, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are all N-channel MOS tubes.

[0095] like Figure 3 As shown, in some embodiments, the rectifier circuit 120 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7 and an eighth diode D8, wherein:

[0096] The anode of the first diode D1 and the cathode of the second diode D2 are connected to form a first node, and the first node is connected to the first output terminal of the transformer 100;

[0097] The anode of the third diode D3 and the cathode of the fourth diode D4 are connected to form a second node, and the second node is connected to the second output terminal of the transformer 100;

[0098] The anode of the fifth diode D5 and the cathode of the sixth diode D6 are connected to form a third node, and the third node is connected to the third output terminal of the transformer 100;

[0099] The anode of the seventh diode D7 and the cathode of the eighth diode D8 are connected to form a fourth node, and the fourth node is connected to the fourth output terminal of the transformer 100;

[0100] A common end of the second diode D2 and the fourth diode D4 is connected to a common end of the fifth diode D5 and the seventh diode D7;

[0101] The cathode of the first diode D1 is connected to the cathode of the third diode D3 to form a fifth node, and the fifth node is connected to the first output end of the rectifier circuit 120;

[0102] An anode of the sixth diode D6 is connected to an anode of the eighth diode D8 to form a sixth node, and the sixth node is connected to the second output end of the rectifier circuit 120 .

[0103] The above Figure 3 In the transformer application system shown, the input end of the diode is the anode and the output end is the cathode. Optionally, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5, the sixth diode D6, the seventh diode D7 and the eighth diode D8 can also be replaced by triodes or MOS tubes.

[0104] like Figure 3 As shown, in some embodiments, the filter circuit 130 includes a first inductor L1 and a second capacitor C2, wherein:

[0105] The first end of the first inductor L1 is electrically connected to the first output end of the rectifier circuit 120;

[0106] The first end of the second capacitor C2 serves as the ground end of the filter circuit 130 and is electrically connected to the second output end of the rectifier circuit 120;

[0107] A common end of the first inductor L1 and the second capacitor C2 serves as an output end of the filter circuit 130 .

[0108] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A transformer, characterized in that: The invention comprises a magnetic core, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding, wherein: The magnetic core comprises a first magnetic core structure and a second magnetic core structure, the first magnetic core structure and the second magnetic core structure are connected to form a closed magnetic circuit, and the first magnetic core structure and the second magnetic core structure have the same size, shape and magnetic resistance; The first primary winding is wound on the first magnetic core structure, the second primary winding is wound on the second magnetic core structure, the first primary winding and the second primary winding are connected in parallel, two common ends of the first primary winding and the second primary winding serve as the first input end and the second input end of the transformer respectively, and the first primary winding and the second primary winding are wound in opposite directions; The first secondary winding is wound on the first magnetic core structure, and the second secondary winding is wound on the second magnetic core structure; The two output ends of the first secondary winding serve as the first output end and the second output end of the transformer, respectively, for outputting the first output voltage of the transformer; The two output ends of the second secondary winding serve as the third output end and the fourth output end of the transformer respectively, and are used to output the second output voltage of the transformer.

2. A transformer according to claim 1, characterized in that: The first magnetic core structure is a U-shaped magnetic core structure, an arc-shaped magnetic core structure or an angle-shaped magnetic core structure.

3. A transformer application system, characterized in that: A transformer according to any one of claims 1 to 2 is used, comprising: A transformer, used for receiving an AC voltage input, boosting the AC voltage and outputting it as a first output voltage of the transformer and a second output voltage of the transformer; The rectifier circuit is used to receive the first output voltage of the transformer and the second output voltage of the transformer, convert the first output voltage of the transformer and the second output voltage of the transformer into a direct current voltage in series and then output it.

4. A transformer application system according to claim 3, characterized in that: It also includes an input power supply, a first capacitor and a bridge switch circuit, wherein the first input terminal and the second input terminal of the bridge switch circuit are electrically connected to the positive electrode and the negative electrode of the input power supply respectively, and the two ends of the first capacitor are electrically connected to the first input terminal and the second input terminal of the bridge switch circuit respectively, wherein: The bridge switch circuit receives a DC voltage input from the input power source, converts the DC voltage into an AC voltage, and then outputs the AC voltage to the transformer.

5. A transformer application system according to claim 4, characterized in that: The bridge switch circuit includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, wherein: The positive electrode of the input power supply is connected to the input end of the first switch tube and the input end of the third switch tube respectively; The output end of the first switch tube is connected to the input end of the second switch tube; The output end of the third switch tube is connected to the input end of the fourth switch tube; The output end of the second switch tube and the output end of the fourth switch tube are respectively connected to the negative electrode of the input power supply; The common end of the first switch tube and the second switch tube serves as the first output end of the bridge switch circuit; The common end of the third switch tube and the fourth switch tube serves as the second output end of the bridge switch circuit; The first output terminal of the bridge switch circuit is electrically connected to the first input terminal of the transformer; The second output end of the bridge switch circuit is electrically connected to the second input end of the transformer.

6. A transformer application system according to claim 5, characterized in that: The rectifier circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode and an eighth diode, wherein: An anode of the first diode and a cathode of the second diode are connected to form a first node, and the first node is connected to a first output terminal of the transformer; The anode of the third diode is connected to the cathode of the fourth diode to form a second node, and the second node is connected to the second output terminal of the transformer; The anode of the fifth diode is connected to the cathode of the sixth diode to form a third node, and the third node is connected to the third output terminal of the transformer; The anode of the seventh diode is connected to the cathode of the eighth diode to form a fourth node, and the fourth node is connected to the fourth output terminal of the transformer; A common end of the second diode and the fourth diode is connected to a common end of the fifth diode and the seventh diode; The cathode of the first diode is connected to the cathode of the third diode to form a fifth node, and the fifth node is connected to the first output end of the rectifier circuit; An anode of the sixth diode is connected to an anode of the eighth diode to form a sixth node, and the sixth node is connected to the second output end of the rectifier circuit.

7. A transformer application system according to claim 6, characterized in that: The system also includes a filtering circuit, which is used to receive the DC voltage input of the rectifier circuit and output the DC voltage after filtering.

8. A transformer application system according to claim 7, characterized in that: The filter circuit comprises a first inductor and a second capacitor, wherein: The first end of the first inductor is electrically connected to the first output end of the rectifier circuit; The first end of the second capacitor serves as the ground end of the filter circuit and is electrically connected to the second output end of the rectifier circuit; A common end of the first inductor and the second capacitor serves as an output end of the filter circuit.

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