Magnetic integration device, low-voltage high-power adjustable power supply and low-voltage system

Abstract

The utility model relates to the technical field of high-frequency switching power supplies, and mainly provides a magnetic integration device, a low-voltage high-power adjustable power supply and a low-voltage system, the device comprises a first inductance module consisting of a first magnetic ring, a second magnetic ring, a first coil and a second coil, and a second inductance module consisting of a third coil and a fourth coil; the first coil and the second coil are both wound on the first magnetic ring, and the third coil and the fourth coil are both wound on the second magnetic ring. The first coil and the second coil are respectively connected with dotted terminals of secondary windings of the first transformer and the second transformer, and the third coil and the fourth coil are respectively connected with non-dotted terminals of the secondary windings of the first transformer and the second transformer. And the first coil and the second coil which are connected with the dotted terminals of the two transformers are wound on the same magnetic ring, so that the voltage oscillation at the two ends of the windings of the two transformers when the four coils use independent magnetic rings is eliminated through the magnetic coupling of the first coil and the second coil and the magnetic coupling of the third coil and the fourth coil.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency switching power supplies, and in particular to a magnetic integrated device, a low-voltage high-power adjustable power supply, and a low-voltage system. Background Technology

[0002] In high-power, low-voltage, full-range adjustable, high-current output power supply applications, the voltage drop of the secondary circuit has a significant impact on efficiency. High current places higher demands on transformer manufacturing processes, presents challenges to transformer cooling, and also requires higher current ratings for rectifier diodes or synchronous rectifier MOSFETs. The current multiplier rectifier circuit evolved from the full-bridge rectifier circuit; it can be transformed into a current multiplier rectifier circuit by replacing one of the switching transistors in one arm of the full-bridge rectifier circuit with an inductor. In a current multiplier rectifier circuit, the transformer secondary winding only requires one winding, which reduces the manufacturing difficulty compared to the center-tapped winding required in a full-wave rectifier circuit. The number of switching devices in a current multiplier rectifier circuit is half that of a full-bridge rectifier circuit, and under the same output current, the current flowing through the transformer secondary winding in a current multiplier rectifier circuit is half that of a full-bridge rectifier circuit. The average current of the two filter inductors in a current multiplier rectifier circuit is only half that of the output current, reducing output current ripple under the same conditions.

[0003] However, the two inductors in the current multiplier rectifier circuit increase the number of magnetic components, increasing the size and weight of the power supply. In cases where the primary winding of the transformer is connected in series and the secondary winding is connected in parallel, the discrete filter inductor and the transformer parasitic parameters can resonate, easily causing voltage oscillations across the transformer windings. Utility Model Content

[0004] This invention provides a magnetic integrated device, a low-voltage high-power adjustable power supply, and a low-voltage system, which helps to solve the technical problem of voltage oscillation at both ends of the transformer windings in existing low-voltage systems with two transformer primary windings connected in series and secondary windings connected in parallel during current multiplier rectification, due to the resonance between the discrete filter inductor and the transformer parasitic parameters.

[0005] One technical solution adopted in this embodiment of the utility model is as follows: A magnetic integrated device is provided for use in a low-voltage, high-power adjustable power supply. The low-voltage, high-power adjustable power supply includes a first transformer and a second transformer. The magnetic integrated device includes a first magnetic ring, a second magnetic ring, a first inductor module, and a second inductor module. The first inductor module includes a first coil and a second coil, and the second inductor module includes a third coil and a fourth coil. The first coil and the second coil are coupled to each other, and the third coil and the fourth coil are also coupled to each other. The first coil and the second coil are both wound on the first magnetic ring, and the third coil and the fourth coil are both wound on the second magnetic ring. The first coil and the third coil are also connected to the secondary winding of the first transformer, and the second coil and the fourth coil are also connected to the secondary winding of the second transformer. Specifically, the first coil is connected to the corresponding terminal of the secondary winding of the first transformer, and the second coil is connected to the corresponding terminal of the secondary winding of the second transformer. The first inductor module is configured such that when a positive voltage is output at the same-named terminals of the secondary windings of the first and second transformers, the current flowing through the first inductor module gradually increases, and when a negative voltage is output at the same-named terminals of the secondary windings of the first and second transformers, the current flowing through the first inductor module gradually decreases. The second inductor module is configured such that when a positive voltage is output at the non-same-named terminals of the secondary windings of the first and second transformers, the current flowing through the second inductor module gradually increases, and when a negative voltage is output at the non-same-named terminals of the secondary windings of the first and second transformers, the current flowing through the second inductor module gradually decreases. In some embodiments, the low-voltage high-power adjustable power supply further includes a filter module connected to the first and second inductor modules. The magnetic integrated device further includes a switching module connected to the first and second transformers respectively, and also connected to the first, second, third, and fourth coils respectively. The switching module responds to a positive voltage output from the corresponding terminals of the secondary windings of the first and second transformers. This positive voltage is applied to the first and second coils, causing the current flowing through them to gradually increase under the influence of the positive voltage, thus outputting the current to the filter module through the first and second coils. It also responds to a positive voltage output from the non-corresponding terminals of the secondary windings of the first and second transformers, applied to the third and fourth coils. This positive voltage causes the current flowing through the third and fourth coils to gradually increase under the influence of the positive voltage, thus outputting the current to the filter module through the third and fourth coils.

[0006] In some embodiments, the switching module is configured to control the current in the first coil and the second coil to increase by a preset increment, and the current in the third coil and the fourth coil to decrease by a preset decrease, based on the positive voltage output from the corresponding terminals of the secondary windings. It also controls the current in the first coil and the second coil to decrease by a preset decrease, and the current in the third coil and the fourth coil to increase by a preset increment, based on the positive voltage output from the non-corresponding terminals of the secondary windings.

[0007] In some embodiments, the switching module includes a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor. The first terminal of the first switching transistor is connected to the same-name terminal of the secondary winding of the first transformer and the first coil, respectively. The second terminal of the first switching transistor is connected to the first terminal of the second switching transistor and is also connected to a filter module. The second terminal of the second switching transistor is connected to the non-same-name terminal of the secondary winding of the first transformer and the third coil, respectively. The first terminal of the third switching transistor is connected to the same-name terminal of the secondary winding of the second transformer and the second coil, respectively. The second terminal of the third switching transistor is connected to the first terminal of the fourth switching transistor and is also connected to the filter module. The second terminal of the fourth switching transistor is connected to the fourth coil and the non-same-name terminal of the secondary winding of the second transformer, respectively. The first, second, third, and fourth switching transistors are all also connected to a controller. The first, second, third, and fourth switching transistors are all used to receive control signals output by the controller and are turned on alternately according to the control signals. Specifically, the first and third switching transistors have the same on / off state, the second and fourth switching transistors have the same on / off state, and the first and second switching transistors are turned on alternately.

[0008] In some embodiments, the first coil and the second coil are wound in the same direction on the first magnetic ring. The third coil and the fourth coil are wound in the same direction on the second magnetic ring.

[0009] In some embodiments, the number of turns and inductance of the first coil are the same as those of the second coil. The number of turns and inductance of the third coil are the same as those of the fourth coil.

[0010] To solve the aforementioned technical problems, another technical solution adopted in this utility model embodiment is: providing a low-voltage, high-power adjustable power supply, which includes a phase-shifting full-bridge circuit, a transformer module, a filter module, and the aforementioned magnetic integrated device. The transformer module includes a first transformer and a second transformer. The primary windings of the first transformer and the second transformer are connected in series. The primary windings of both transformers are also connected to the phase-shifting full-bridge circuit. The secondary windings of both transformers are connected in parallel and to the magnetic integrated device. The phase-shifting full-bridge circuit receives the bus voltage. The magnetic integrated device is also connected to the filter module and a controller. The phase-shifting full-bridge circuit receives the drive signal output by the controller and converts the bus voltage based on the drive signal to output a corresponding first voltage signal to the transformer module. The transformer module receives the first voltage signal and converts it to a second voltage signal according to the turns ratio of the transformer module before inputting it to the magnetic integrated device, which then outputs it to the filter module.

[0011] In some embodiments, the corresponding terminal of the primary winding of the first transformer is located in a first position of the first transformer, and the corresponding terminal of the primary winding of the second transformer is located in a first position of the second transformer. The corresponding terminal of the secondary winding of the first transformer is located in a second position of the first transformer, and the corresponding terminal of the secondary winding of the second transformer is located in a second position of the second transformer.

[0012] In some embodiments, the winding structure and turns ratio of the first transformer are the same as those of the second transformer.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in this utility model embodiment is to provide a low-voltage system, which includes a controller and the low-voltage high-power adjustable power supply as described above.

[0014] Unlike related technologies, this utility model provides a magnetic integrated device, a low-voltage high-power adjustable power supply, and a low-voltage system. The magnetic integrated device includes a first magnetic ring, a second magnetic ring, a first inductor module, and a second inductor module. The first inductor module includes a first coil and a second coil, and the second inductor module includes a third coil and a fourth coil. The first coil and the second coil are coupled to each other, and the third coil and the fourth coil are coupled to each other. The first coil and the second coil are both wound on the first magnetic ring, and the third coil and the fourth coil are both wound on the second magnetic ring. The first coil and the third coil are also connected to the secondary winding of a first transformer, and the second coil and the fourth coil are also connected to the secondary winding of a second transformer. The first coil is connected to the corresponding terminal of the secondary winding of the first transformer, and the second coil is connected to the corresponding terminal of the secondary winding of the second transformer. By winding the first and second coils, which are connected to the same terminals of the first and second transformers, onto the same magnetic ring, the voltage oscillations across the transformer windings when using independent magnetic rings for the first, second, third, and fourth coils can be eliminated through the magnetic coupling of the first and second coils and the magnetic coupling of the third and fourth coils.

[0015] The first inductor module is configured such that when a positive voltage is output from the corresponding terminals of the secondary windings of the first and second transformers, the current flowing through the first inductor module gradually increases, and when a negative voltage is output from the corresponding terminals of the secondary windings of the first and second transformers, the current flowing through the first inductor module gradually decreases. The second inductor module is configured such that when a positive voltage is output from the corresponding terminals of the secondary windings of the first and second transformers, the current flowing through the second inductor module gradually increases, and when a negative voltage is output from the corresponding terminals of the secondary windings of the first and second transformers, the current flowing through the second inductor module gradually decreases. In the first inductor module, the first coil and the second coil form magnetic coupling, and in the second inductor module, the third coil and the fourth coil form magnetic coupling. Based on this, voltage oscillations across the transformer windings can be eliminated while outputting a preset voltage. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a structural block diagram of a low-pressure system provided in an embodiment of the present invention.

[0018] Figure 2a This is a circuit diagram of the fifth and eighth switching transistors after they are turned on in a low-voltage, high-power adjustable power supply provided in this embodiment of the utility model.

[0019] Figure 2b This is a circuit diagram of the sixth and seventh switching transistors after they are turned on in a low-voltage, high-power adjustable power supply provided in this embodiment of the present invention.

[0020] Figure 3 This is a structural block diagram of a magnetic integrated device provided in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the inductor module provided in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] The technical features involved in the various embodiments of this application described below do not conflict with each other and can be combined with each other.

[0024] When an element is described as "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0025] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figure 1 , Figure 1 This is a structural block diagram of a low-voltage system provided in an embodiment of this utility model, as shown below. Figure 1 As shown, the low-voltage system 100 includes a controller 10 and a low-voltage high-power adjustable power supply 20. The controller 10 is connected to the low-voltage high-power adjustable power supply 20. The controller 10 is used to control the operating state of the low-voltage high-power adjustable power supply 20 so that the low-voltage high-power adjustable power supply 20 outputs a preset voltage.

[0028] In some embodiments, the low-voltage system 100 further includes a bus capacitor (not shown), which is connected to a low-voltage high-power adjustable power supply 20. The bus capacitor is used to store high voltage, and the low-voltage high-power adjustable power supply 20 is used to receive the bus voltage output by the bus capacitor and process the bus voltage based on the drive signal of the controller 10, thereby outputting a preset voltage.

[0029] In yet another embodiment, such as Figure 1 As shown, the low-voltage high-power adjustable power supply 20 includes a phase-shifting full-bridge circuit 21, a transformer module 22, a filter module 23, and a magnetic integrated device 24.

[0030] The transformer module 22 includes a first transformer T1 and a second transformer T2. The primary windings of the first transformer T1 and the second transformer T2 are connected in series. The primary windings of the first transformer T1 and the second transformer T2 are also connected to the phase-shifting full-bridge circuit 21. The secondary windings of the first transformer T1 and the second transformer T2 are connected in parallel and connected to the magnetic integrated device 24. The phase-shifting full-bridge circuit 21 is used to receive the bus voltage. The magnetic integrated device 24 is also connected to the filter module 23. The phase-shifting full-bridge circuit 21 is also used to connect to the controller 10.

[0031] The phase-shifting full-bridge circuit 21 is used to receive the drive signal output by the controller 10 and convert the bus voltage based on the drive signal to output the corresponding first voltage signal to the transformer module 22.

[0032] The transformer module 22 is used to receive the first voltage signal and convert the first voltage signal into a second voltage signal according to the turns ratio of the transformer module 22, and then input it to the magnetic integrated device 24, so as to output it to the filter module 23 through the magnetic integrated device 24.

[0033] In some embodiments, the winding structure and turns ratio of the first transformer T1 are the same as those of the second transformer T2. It should be noted that the winding structure includes the number of turns and winding method of the transformer coils. By setting the winding structure and turns ratio of the first transformer T1 and the second transformer T2 to be the same, when the primary winding voltage of the first transformer T1 is the same as the primary winding voltage of the second transformer T2, the secondary winding voltage of the first transformer T1 and the secondary winding voltage of the second transformer T2 are also the same.

[0034] Specifically, the phase-shifting full-bridge circuit 21 is also connected to the bus capacitor. When the phase-shifting full-bridge circuit 21 receives the drive signal output by the controller 10, it converts the bus voltage output by the bus capacitor based on the drive signal, thereby outputting a first voltage signal to the primary windings of the first transformer T1 and the second transformer T2. Since the primary windings of the first transformer T1 and the second transformer T2 are connected in series, and the winding structures and turns ratios of the first transformer T1 and the second transformer T2 are the same, the primary side of the first transformer T1 and the primary side of the second transformer T2 jointly divide the first voltage signal, and the voltages divided on the primary side of the first transformer T1 and the primary side of the second transformer T2 are the same. Based on the same turns ratio of the transformers, after the first transformer T1 and the second transformer T2 convert the first voltage signal into a second voltage signal, the second voltage signal output by the first transformer T1 is the same as the second voltage signal output by the second transformer T2. When the first transformer T1 and the second transformer T2 output the second voltage signal respectively, the magnetic integrated device 24 will process the second voltage signal based on the control signal output by the controller 10, and then output the second voltage signal to the filter module 23.

[0035] It should be noted that by connecting the primary winding of the first transformer T1 in series with the primary winding of the second transformer T2, and connecting the secondary windings of the first transformer T1 and the second transformer T2 in parallel, the power transmission capacity of the power supply is increased while ensuring that the current in the primary windings of the first transformer T1 and the second transformer T2 is the same.

[0036] In yet another embodiment, please refer to Figures 2a-2b , Figure 2a This is a circuit diagram of the fifth and eighth switching transistors after they are turned on in a low-voltage, high-power adjustable power supply provided by an embodiment of this utility model. Figure 2b This is a circuit diagram showing the sixth and seventh switching transistors after they are turned on in a low-voltage, high-power adjustable power supply provided in this embodiment of the utility model. Figures 2a-2b As shown, the corresponding terminal (A) of the primary winding of the first transformer T1 is located in the first position of the first transformer T1, and the corresponding terminal (B) of the primary winding of the second transformer T2 is located in the first position of the second transformer T2.

[0037] The corresponding terminal (a) of the secondary winding of the first transformer T1 is located in the second position of the first transformer T1, and the corresponding terminal (b) of the secondary winding of the second transformer T2 is located in the second position of the second transformer T2.

[0038] It should be noted that by setting the same terminal of the first transformer T1 and the same terminal of the second transformer T2 at the same position of the corresponding transformers, the current in the secondary winding of the first transformer T1 and the secondary winding of the second transformer T2 can be made equal according to the same turns ratio of the transformers, thereby achieving current sharing between the two transformers.

[0039] In some embodiments, such as Figures 2a-2b As shown, the phase-shifted full-bridge circuit 21 includes a fifth switch Q1, a sixth switch Q2, a seventh switch Q3, an eighth switch Q4, diodes D1, D2, D3, and D4, capacitors C1, C2, C3, and C4, and an inductor Lr. Diodes D1, D2, D3, and D4 are the body diodes corresponding to the switches. Capacitors C1, C2, C3, and C4 are the sum of the parasitic capacitances corresponding to the switches and the external parallel capacitances. The inductor Lr is the sum of the leakage inductance of the first transformer T1 and the second transformer T2, and the external inductance.

[0040] Specifically, such as Figure 2a As shown, when the bus capacitance (C) in When the controller 10 outputs a drive signal to the fifth switch Q1 and the eighth switch Q4, the fifth switch Q1 and the eighth switch Q4 are turned on. At this time, the bus voltage flows through the fifth switch Q1 into the primary winding of the first transformer T1 and the primary winding of the second transformer T2, and then into the ground terminal (the negative terminal of the bus capacitor) through the eighth switch Q4. Since the winding structure and turns ratio of the first transformer T1 and the second transformer T2 are the same, the voltage on the primary winding of the first transformer T1 and the primary winding of the second transformer T2 is the same.

[0041] It is known that, as Figure 2a As shown, based on the positions of the corresponding terminals of the first transformer T1 and the second transformer T2, when the fifth switch Q1 and the eighth switch Q4 are turned on, the corresponding terminals of the primary windings of the first transformer T1 and the second transformer T2 are both positive voltages. Therefore, the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2 are also positive voltages, and the voltage of the secondary winding of the first transformer T1 is the same as the voltage of the secondary winding of the second transformer T2.

[0042] In some embodiments, such as Figure 2bAs shown, when the bus capacitor outputs the bus voltage and the controller 10 outputs a drive signal to the control terminals of the sixth switch Q2 and the seventh switch Q3, the sixth switch Q2 and the seventh switch Q3 are turned on. The bus voltage flows into the second transformer T2 through the sixth switch Q2, then into the first transformer T1 from the second transformer T2, and finally into the ground terminal via the seventh switch Q3. At this time, the voltages at the primary winding terminals of the first transformer T1, the secondary winding terminals of the first transformer T1, the primary winding terminals of the second transformer T2, and the secondary winding terminals of the second transformer T2 are all negative voltages.

[0043] It should be noted that while controller 10 primarily employs the upper-side transistor modulation approach when outputting drive signals, in this specification, a 50% duty cycle drive signal is used to drive the lower-side transistors. Specifically, the duty cycle of the drive signals for the seventh switch Q3 and the eighth switch Q4 is set to 50%, causing Q3 and Q4 to conduct alternately for the same duration. This allows adjustment of the output voltage by regulating the pulse width of the drive signals for the fifth switch Q1 and the sixth switch Q2. Setting the duty cycle of the drive signals for the seventh switch Q3 and the eighth switch Q4 to 50% ensures the reliability of the power supply to the upper-side transistor drive circuit. It is understood that the phase-shifted full-bridge circuit 21 primarily achieves positive and negative voltage output by controlling the duty cycle of the upper-side transistor drive signals; therefore, the output voltage can be adjusted by regulating the duty cycle of the upper-side transistor drive signals.

[0044] In another embodiment, the phase-shifted full-bridge circuit 21 can also be implemented in other ways based on the output of positive or negative voltage from the first transformer T1 and the second transformer T2, such as through a body diode or parasitic capacitance. The principle is similar to that of the above-mentioned implementation through a switching transistor, and will not be described again here.

[0045] In another embodiment, please refer to Figures 3-4 , Figure 3 This is a structural block diagram of a magnetic integrated device provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the inductor module provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the magnetic integrated device 24 includes a first magnetic ring 241, a second magnetic ring 242, a first inductor module L1 and a second inductor module L2. The first inductor module L1 includes a first coil n1 and a second coil n2, and the second inductor module L2 includes a third coil n3 and a fourth coil n4. The first coil n1 and the second coil n2 are coupled to each other, and the third coil n3 and the fourth coil n4 are coupled to each other.

[0046] Combination Figure 4 and Figures 2a-2bThe first coil n1 and the second coil n2 are both wound on the first magnetic ring 241, and the third coil n3 and the fourth coil n4 are both wound on the second magnetic ring 242. The first coil n1 and the third coil n3 are also connected to the secondary winding of the first transformer T1, and the second coil n2 and the fourth coil n4 are also connected to the secondary winding of the second transformer T2. Specifically, the first coil n1 is connected to the corresponding terminal of the secondary winding of the first transformer T1, and the second coil n2 is connected to the corresponding terminal of the secondary winding of the second transformer T2.

[0047] The first inductor module L1 is configured such that when a positive voltage is output at the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2, the current flowing through the first inductor module L1 gradually increases, and when a negative voltage is output at the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2, the current flowing through the first inductor module L1 gradually decreases.

[0048] The second inductor module L2 is configured such that when a positive voltage is output at the non-corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2, the current flowing through the second inductor module L2 gradually increases, and when a negative voltage is output at the non-corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2, the current flowing through the second inductor module L2 gradually decreases.

[0049] It is known that when the first coil n1, the second coil n2, the third coil n3, and the fourth coil n4 are all discrete inductors, if the first transformer T1 and the second transformer T2 output voltage to the first coil n1 and the second coil n2, the first coil n1 and the second coil n2 will not only couple with each other, but may also couple with the third coil n3, the first transformer T1, and the second transformer T2, thereby causing voltage oscillations across the windings of the first transformer T1 and the second transformer T2, which in turn leads to unstable output parameters. This application winds the first coil n1 and the second coil n2, which are connected to the same terminal of the first transformer T1 and the same terminal of the second transformer T2, onto the same magnetic ring (first magnetic ring 241). It also winds the third coil n3 and the fourth coil n4, which are connected to the non-same terminal of the first transformer T1 and the non-same terminal of the second transformer T2, onto the same magnetic ring (second magnetic ring 242). This utilizes the magnetic coupling of the first coil n1 and the second coil n2, as well as the magnetic coupling of the third coil n3 and the fourth coil n4, to eliminate voltage oscillations in the secondary windings of the first transformer T1 and the second transformer T2, thereby enabling the low-voltage, high-power adjustable power supply to stably output a preset voltage.

[0050] In some embodiments, such as Figure 3As shown, the magnetic integrated device 24 also includes a switch module 243, which is connected to the first transformer T1 and the second transformer T2 respectively. The switch module 243 is also connected to the first coil n1, the second coil n2, the third coil n3 and the fourth coil n4 respectively.

[0051] The switching module 243 responds to the positive voltage output from the same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2, and applies the positive voltage to the first coil n1 and the second coil n2, so that the current flowing through the first coil n1 and the second coil n2 gradually increases under the action of the positive voltage, so as to output the current to the filter module 23 through the first coil n1 and the second coil n2; and responds to the positive voltage output from the non-same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2, and applies the positive voltage to the third coil n3 and the fourth coil n4, so that the current flowing through the third coil n3 and the fourth coil n4 gradually increases under the action of the positive voltage, so as to output the current to the filter module 23 through the third coil n3 and the fourth coil n4.

[0052] Specifically, when the same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2 output positive voltage, the switching module 243 also receives the control signal output by the controller 10, and inputs the positive voltage into the first inductor module L1 based on the control signal, so that the current in the first inductor module L1 gradually increases. After the current flows through the first inductor module L1, it is output to the filter module 23, thereby causing the filter module 23 to output a preset voltage. When the non-same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2 output positive voltage, the controller 10 outputs a control signal to the switching module 243, thereby causing the current in the second inductor module L2 to gradually increase, and then outputting the current to the filter module 23 through the second inductor module L2.

[0053] In some embodiments, the switching module 243 is configured to control the current in the first coil n1 and the second coil n2 to increase by a preset increment and the current in the third coil n3 and the fourth coil n4 to decrease by a preset decrease based on the positive voltage output from the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2; and to control the current in the first coil n1 and the second coil n2 to decrease by a preset decrease and the current in the third coil n3 and the fourth coil n4 to increase by a preset increment based on the positive voltage output from the non-corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2.

[0054] It should be noted that the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2 will alternately output positive and negative voltages. When a corresponding terminal outputs a positive voltage, a non-corresponding terminal will output a negative voltage, and vice versa. Therefore, when the corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2 output a positive voltage, since the current in the inductor cannot change abruptly, the current flowing through the first inductor module L1 gradually increases under the positive voltage, while the current flowing through the second inductor module L2 gradually decreases under the negative voltage. Conversely, when the non-corresponding terminals of the secondary windings of the first transformer T1 and the second transformer T2 output a positive voltage, the current in the first inductor module L1 gradually decreases, and the current in the second inductor module L2 gradually increases. Based on this, the output voltage of the filter module 23 can be set to a preset voltage based on the first inductor module L1 and the second inductor module L2.

[0055] In some embodiments, the first coil n1 and the second coil n2 are wound in the same direction on the first magnetic ring 241; the third coil n3 and the fourth coil n4 are wound in the same direction on the second magnetic ring 242.

[0056] In another embodiment, the number of turns and inductance of the first coil n1 are the same as those of the second coil n2; the number of turns and inductance of the third coil n3 are the same as those of the fourth coil n4.

[0057] In another embodiment, such as Figures 2a-2b As shown, the filter module 23 is a capacitor Co, which is connected to the first inductor module L1 and the second inductor module L2 respectively. The capacitor Co is also used for grounding. The capacitor Co is used to receive the voltage signals output by the first inductor module L1 and / or the second inductor module L2.

[0058] In some embodiments, such as Figures 2a-2b As shown, the switch module 243 includes a first switch Q5, a second switch Q6, a third switch Q7, and a fourth switch Q8;

[0059] The first terminal of the first switch Q5 is connected to the same-name terminal of the secondary winding of the first transformer T1 and the first coil n1, respectively. The second terminal of the first switch Q5 is connected to the first terminal of the second switch Q6. The second terminal of the first switch Q5 is also connected to the filter module 23. The second terminal of the second switch Q6 is connected to the non-same-name terminal of the secondary winding of the first transformer T1 and the third coil n3, respectively. The first terminal of the third switch Q7 is connected to the same-name terminal of the secondary winding of the second transformer T2 and the second coil n2, respectively. The second terminal of the third switch Q7 is connected to the first terminal of the fourth switch Q8. The second terminal of the third switch Q7 is also connected to the filter module 23. The second terminal of the fourth switch Q8 is connected to the fourth coil n4 and the non-same-name terminal of the secondary winding of the second transformer T2, respectively. The first switch Q5, the second switch Q6, the third switch Q7 and the fourth switch Q8 are also connected to the controller 10.

[0060] The first switch Q5, the second switch Q6, the third switch Q7, and the fourth switch Q8 are all used to receive the control signal output by the controller 10, and are turned on alternately according to the control signal. The first switch Q5 and the third switch Q7 have the same on / off state, the second switch Q6 and the fourth switch Q8 have the same on / off state, and the first switch Q5 and the second switch Q6 are turned on alternately.

[0061] Specifically, such as Figure 2a As shown, when the same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2 output positive voltage, the second switch Q6 and the fourth switch Q8 will also receive control signals and turn on based on the control signals. After the same-name terminal of the secondary winding of the first transformer T1 outputs positive voltage, the positive voltage will be input to the positive terminal of capacitor Co through the same-name terminal of the first transformer T1 and the first coil n1, and then return to the non-same-name terminal of the first transformer T1 through the negative terminal of capacitor Co and the second switch Q6; at the same time, the positive voltage of the same-name terminal of the secondary winding of the second transformer T2 will also flow into the second coil n2 through the same-name terminal of the second transformer T2, and be input to the positive terminal of capacitor Co through the second coil n2, and then flow back to the non-same-name terminal of the second transformer T2 through capacitor Co and the fourth switch Q8.

[0062] In some embodiments, such as Figure 2bAs shown, when a positive voltage is output from the non-same-name terminals of the secondary windings of the first transformer T1 and the second transformer T2, the first switch Q5 and the third switch Q7 will also receive a control signal and turn on based on the control signal. At this time, the positive voltage will return to the same-name terminal of the first transformer T1 through the non-same-name terminal, the third coil n3, the capacitor Co, and the first switch Q5; at the same time, the positive voltage output from the non-same-name terminal of the second transformer T2 will flow back to the same-name terminal of the second transformer T2 through the fourth coil n4, the capacitor Co, and the third switch Q7. Based on this, the filter module 23 can be output when the secondary windings of the first transformer T1 and the second transformer T2 output positive and negative voltages, thereby enabling the low-voltage high-power adjustable power supply to output the preset voltage in real time.

[0063] This utility model provides a magnetic integration device, which includes a first magnetic ring, a second magnetic ring, a first inductor module, and a second inductor module. The first inductor module includes a first coil and a second coil, and the second inductor module includes a third coil and a fourth coil. The first coil and the second coil are coupled to each other, and the third coil and the fourth coil are coupled to each other. The first coil and the second coil are both wound on the first magnetic ring, and the third coil and the fourth coil are both wound on the second magnetic ring. The first coil and the third coil are also connected to the secondary winding of a first transformer, and the second coil and the fourth coil are also connected to the secondary winding of a second transformer. The first coil is connected to the corresponding terminal of the secondary winding of the first transformer, and the second coil is connected to the corresponding terminal of the secondary winding of the second transformer. By winding the first and second coils, which are connected to the same-name terminals of the secondary windings of the first and second transformers, onto the same magnetic ring, and winding the third and fourth coils, which are connected to the different-name terminals of the secondary windings of the first and second transformers, onto the same magnetic ring, the voltage oscillations across the windings of the first and second transformers can be eliminated through the magnetic coupling of the first and second coils and the magnetic coupling of the third and fourth coils.

[0064] The first inductor module is configured such that when a positive voltage is output at the same-named terminals of the secondary windings of the first and second transformers, the current of the first inductor module gradually increases under the influence of the positive voltage, and when a negative voltage is output at the same-named terminals of the secondary windings of the first and second transformers, the current of the first inductor module gradually decreases under the influence of the negative voltage. The second inductor module is configured such that when a positive voltage is output at the non-corresponding terminals of the secondary windings of the first and second transformers, the current of the second inductor module gradually increases under the influence of the positive voltage, and when a negative voltage is output at the non-corresponding terminals of the secondary windings of the first and second transformers, the current of the second inductor module gradually decreases under the influence of the negative voltage. The magnetic coupling between the first and second coils in the first inductor module and the magnetic coupling between the third and fourth coils in the second inductor module are also included. Based on this, voltage oscillations across the first transformer and its windings can be eliminated while outputting a preset voltage.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in detail for the sake of brevity; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A magnetic integrated device, characterized in that, It is applied to a low-voltage, high-power adjustable power supply, which includes a first transformer and a second transformer, and the magnetic integrated device includes a first magnetic ring, a second magnetic ring, a first inductor module and a second inductor module. The first inductor module includes a first coil and a second coil, and the second inductor module includes a third coil and a fourth coil. The first coil and the second coil are coupled to each other, and the third coil and the fourth coil are coupled to each other. The first coil and the second coil are both wound on the first magnetic ring, and the third coil and the fourth coil are both wound on the second magnetic ring. The first coil and the third coil are also connected to the secondary winding of the first transformer, and the second coil and the fourth coil are also connected to the secondary winding of the second transformer. The first coil is connected to the same-name terminal of the secondary winding of the first transformer, and the second coil is connected to the same-name terminal of the secondary winding of the second transformer. The first inductor module is configured such that when a positive voltage is output at the same terminal of the secondary windings of the first transformer and the second transformer, the current flowing through the first inductor module gradually increases, and when a negative voltage is output at the same terminal of the secondary windings of the first transformer and the second transformer, the current flowing through the first inductor module gradually decreases. The second inductor module is configured such that when a positive voltage is output at the non-corresponding terminals of the secondary windings of the first transformer and the second transformer, the current flowing through the second inductor module gradually increases, and when a negative voltage is output at the non-corresponding terminals of the secondary windings of the first transformer and the second transformer, the current flowing through the second inductor module gradually decreases.

2. The magnetic integrated device according to claim 1, characterized in that, The low-voltage high-power adjustable power supply also includes a filter module, which is connected to the first inductor module and the second inductor module. The magnetic integrated device also includes a switching module. The switching module is connected to the first transformer and the second transformer respectively, and the switching module is also connected to the first coil, the second coil, the third coil and the fourth coil respectively; The switching module responds to the positive voltage output from the same terminal of the secondary windings of the first transformer and the second transformer. The positive voltage is applied to the first coil and the second coil, and the current flowing through the first coil and the second coil gradually increases under the action of the positive voltage, so as to output the current to the filter module through the first coil and the second coil. In response to the positive voltage output from the non-corresponding terminals of the secondary windings of the first and second transformers, the positive voltage is applied to the third and fourth coils, and the current flowing through the third and fourth coils gradually increases under the action of the positive voltage, so as to output the current to the filter module through the third and fourth coils.

3. The magnetic integrated device according to claim 2, characterized in that, The switching module is used to control the current in the first coil and the second coil to increase by a preset increment and the current in the third coil and the fourth coil to decrease by a preset decrease based on the positive voltage output from the corresponding terminals of the secondary windings; and to control the current in the first coil and the second coil to decrease by a preset decrease and the current in the third coil and the fourth coil to increase by a preset increment based on the positive voltage output from the non-corresponding terminals of the secondary windings.

4. The magnetic integrated device according to claim 2 or 3, characterized in that, The switching module includes a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor; The first terminal of the first switch is connected to the same-name terminal of the secondary winding of the first transformer and the first coil, respectively. The second terminal of the first switch is connected to the first terminal of the second switch and is also connected to the filter module. The second terminal of the second switch is connected to the non-same-name terminal of the secondary winding of the first transformer and the third coil, respectively. The first terminal of the third switch is connected to the same-name terminal of the secondary winding of the second transformer and the second coil, respectively. The second terminal of the third switch is connected to the first terminal of the fourth switch and is also connected to the filter module. The second terminal of the fourth switch is connected to the fourth coil and the non-same-name terminal of the secondary winding of the second transformer, respectively. The first, second, third, and fourth switches are all connected to the controller. The first, second, third, and fourth switches are all used to receive the control signal output by the controller and are alternately turned on according to the control signal. The first and third switches have the same on / off state, the second and fourth switches have the same on / off state, and the first and second switches are alternately turned on.

5. The magnetic integrated device according to any one of claims 1-3, characterized in that, The first coil and the second coil are wound in the same direction on the first magnetic ring; The third coil and the fourth coil are wound in the same direction on the second magnetic ring.

6. The magnetic integrated device according to any one of claims 1-3, characterized in that, The number of turns and inductance of the first coil are the same as those of the second coil; The number of turns and inductance of the third coil are the same as those of the fourth coil.

7. A low-voltage, high-power adjustable power supply, characterized in that, The low-voltage high-power adjustable power supply includes a phase-shifting full-bridge circuit, a transformer module, a filter module, and a magnetic integrated device as described in any one of claims 1-6. The transformer module includes a first transformer and a second transformer. The primary windings of the first transformer and the second transformer are connected in series. The primary windings of the first transformer and the second transformer are also connected to the phase-shifting full-bridge circuit. The secondary windings of the first transformer and the second transformer are connected in parallel and connected to the magnetic integrated device. The phase-shifting full-bridge circuit is used to receive the bus voltage. The magnetic integrated device is also connected to the filter module. The phase-shifting full-bridge circuit is also used to connect to the controller. The phase-shifting full-bridge circuit is used to receive the drive signal output by the controller, and convert the bus voltage based on the drive signal to output a corresponding first voltage signal to the transformer module. The transformer module is used to receive the first voltage signal, and convert the first voltage signal into a second voltage signal according to the turns ratio of the transformer module, and then input it to the magnetic integrated device, so as to output it to the filter module through the magnetic integrated device.

8. The low-voltage, high-power adjustable power supply according to claim 7, characterized in that, The corresponding terminal of the primary winding of the first transformer is located at the first position of the first transformer, and the corresponding terminal of the primary winding of the second transformer is located at the first position of the second transformer; The corresponding terminal of the secondary winding of the first transformer is located at the second position of the first transformer, and the corresponding terminal of the secondary winding of the second transformer is located at the second position of the second transformer.

9. The low-voltage, high-power adjustable power supply according to claim 7, characterized in that, The winding structure and turns ratio of the first transformer are the same as those of the second transformer.

10. A low-voltage system, characterized in that, The low-voltage system includes: A controller; and a low-voltage, high-power adjustable power supply as described in any one of claims 7-9.

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