Transformer coil winding method, transformer and isolated power supply

Abstract

The embodiment of the present invention discloses a transformer coil winding method, a transformer and an isolated power supply. The transformer coil winding method includes: using a metal wire of a first specification wire diameter to densely wind to form a first layer of coils; outside the first layer of coils, using a metal wire of a second specification wire diameter to densely wind to form a second layer of coils; outside the second layer of coils, using a metal wire of a third specification wire diameter to double-wind and evenly wind to form a third layer of coils; outside the third layer of coils, using a metal wire of a fourth specification wire diameter to densely wind to form a fourth layer of coils; outside the fourth layer of coils, using a metal wire of a second specification wire diameter to densely wind to form a fifth layer of coils; the first layer of coils and the fifth layer of coils are used as the primary coils of the transformer, the second layer of coils and the fourth layer of coils are used as the first secondary coils of the transformer, and the third layer of coils are used as the second secondary coils of the transformer. Therefore, the parameters of the manufactured transformer coils can be adjusted by the above method, thereby optimizing the characteristics of the transformer.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of transformers, and in particular to a transformer coil winding method, a transformer, and an isolated power supply. Background Art

[0002] The parameters of the transformer determine the characteristics of the transformer. Since the parameters of the transformer are difficult to adjust, the characteristics of the transformer are difficult to adjust. Summary of the invention

[0003] The embodiment of the present invention provides a transformer coil winding method, a transformer and an isolated power supply to adjust the parameters of the transformer, thereby optimizing the characteristics of the transformer.

[0004] In a first aspect, an embodiment of the present invention provides a transformer coil winding method, characterized by comprising:

[0005] A first layer of coils is formed by densely winding a metal wire of a first specification wire diameter;

[0006] A second coil is formed by densely winding a metal wire of a second diameter around the first coil;

[0007] A third layer of coil is formed by winding a metal wire of a third specification wire diameter in parallel and evenly outside the second layer of coil;

[0008] A fourth coil is formed by densely winding a metal wire with a fourth diameter outside the third coil;

[0009] A fifth coil is formed by densely winding a metal wire of the second specification wire diameter outside the fourth coil;

[0010] The first coil and the fifth coil are used as the primary coil of the transformer, the second coil and the fourth coil are used as the first secondary coil of the transformer, and the third coil is used as the second secondary coil of the transformer.

[0011] Optionally, after forming the fifth layer of coils, the method further includes:

[0012] A sixth coil is formed by densely winding a metal wire with a fifth wire diameter outside the fifth coil;

[0013] The sixth coil serves as the shielding layer of the transformer.

[0014] In a second aspect, an embodiment of the present invention further provides a transformer, which includes: a magnetic core and a coil;

[0015] The coil is manufactured by any transformer coil winding method proposed in the above embodiments.

[0016] In a third aspect, an embodiment of the present invention further provides an isolated power supply, characterized in that it includes: a switch module, a filter module, a power management module, a feedback module, a control module, and any transformer proposed in the above embodiments;

[0017] The input end of the switch module is connected to the external power supply, the output end of the switch module, the first end of the filter module, the first input end of the transformer and the first end of the power management module are connected, the second end of the filter module, the second input end of the transformer and the first end of the control module are connected, the second end of the control module is connected to the second end of the power management module, the first output end of the transformer is connected to the input end of the feedback module, the first output end of the feedback module is connected to the third end of the power management module, and the second output end of the feedback module is connected to the fourth end of the power management module;

[0018] The switch module is used to control the input of electric energy from an external power source; the transformer is used to output a first voltage signal and a second voltage signal according to a control signal; the filter module is used to filter out noise of the electric energy input to the transformer according to the control signal; the feedback module is used to generate a feedback signal according to the second voltage signal, and the power management module is used to generate an adjustment signal according to the feedback signal; and the control module is used to generate a control signal according to the adjustment signal.

[0019] Optionally, the transformer further includes a second output terminal;

[0020] The first end of the primary coil serves as the first end of the transformer, the second end of the primary coil serves as the second end of the transformer, the two ends of the first secondary coil serve as the first output ends of the transformer, and the two ends of the second secondary coil serve as the second output ends of the transformer.

[0021] Optionally, the transformer further includes a first flow direction control unit, a second flow direction control unit, a first filtering unit and a second filtering unit;

[0022] A first end of the first flow direction control unit is connected to a first end of the first secondary coil, a second end of the first flow direction control unit is connected to a first end of the first filtering unit, and a second end of the first secondary coil is connected to a second end of the first filtering unit;

[0023] The first flow direction control unit is used to control the current flow direction of the first secondary coil, and the first filtering unit is used to filter out the clutter mixed in the first voltage signal;

[0024] A first end of the second flow direction control unit is connected to a first end of the second secondary coil, a second end of the second flow direction control unit is connected to a first end of the second filtering unit, and a second end of the second secondary coil is connected to a second end of the second filtering unit;

[0025] The second flow direction control unit is used to control the current flow direction of the second secondary coil, and the second filtering unit is used to filter out the clutter mixed in the second voltage signal.

[0026] Optionally, the feedback module includes an isolation feedback unit, a feedback signal adjustment unit, a third filtering unit and a voltage adjustment unit;

[0027] The first end of the voltage regulating unit and the second end of the voltage regulating unit serve as input ends of the feedback module, the third end of the isolated feedback unit serves as a first output end of the feedback module, and the fourth end of the isolated feedback unit serves as a second output end of the feedback module;

[0028] The first end of the voltage regulating unit, the first end of the isolation feedback unit and the first end of the feedback signal regulating unit are connected, the second end of the voltage regulating unit and the second end of the feedback signal regulating unit are connected, the third end of the voltage regulating unit, the third end of the feedback signal regulating unit and the first end of the third filtering unit are connected; the second end of the third filtering unit and the fourth end of the feedback signal regulating unit are connected, and the second end of the isolation feedback unit and the fifth end of the feedback signal regulating unit are connected;

[0029] The voltage regulating unit is used to adjust the input second voltage signal to obtain a feedback signal, the third filtering unit is used to filter out the clutter in the feedback signal, the feedback signal regulating unit is used to adjust the filtered feedback signal, and the isolation feedback unit is used to transmit the feedback signal to the power management module.

[0030] Optionally, the power management module includes a power management chip;

[0031] The power management chip includes a power supply terminal, an adjustment signal output terminal, a feedback signal input terminal and a power supply terminal;

[0032] The power supply end serves as the first end of the power management module, the adjustment signal output end serves as the second end of the power management module, the power supply end serves as the third end of the power management module, and the feedback signal input end serves as the fourth end of the power management module.

[0033] Optionally, the control module includes a pull-down unit, a control unit and a current limiting unit;

[0034] The first end of the control unit is connected to the first end of the pull-down unit and serves as the first end of the control module, the second end of the control unit serves as the second end of the control module, the third end of the control unit is connected to the first end of the current limiting unit, and the second end of the pull-down unit and the second end of the current limiting unit are grounded;

[0035] The pull-down unit is used to pull down the potential of the first terminal of the control unit when the control unit does not receive the adjustment signal. The control unit is used to generate a control signal according to the adjustment signal. The current limiting unit is used to limit the current flowing through the control unit.

[0036] Optionally, the input end of the switch module includes a power input end and a conduction signal input end;

[0037] The switch module includes a first switch unit, a second switch unit and a fourth filter unit;

[0038] The first end of the first switch unit is used as a conduction signal input end, the second end of the first switch unit, the first end of the fourth filter unit and the first end of the second switch unit are connected, the third end of the first switch unit is grounded, the second end of the fourth filter unit is grounded, the second end of the second switch unit is used as a power input end, and the third end of the second switch unit is used as an output end of the switch module;

[0039] The filtering module includes a fifth filtering unit and a clamping unit;

[0040] The first end of the fifth filtering unit serves as the first end of the filtering module, the second end of the fifth filtering unit is connected to the second end of the clamping unit, and the first end of the clamping unit serves as the second end of the filtering module.

[0041] In the embodiment of the present invention, a first layer of coils is formed by densely winding a metal wire of a first specification wire diameter. Outside the coil of the first layer of coils, a metal wire of a second specification wire diameter is densely wound to form a second layer of coils. Outside the coil of the second layer of coils, a metal wire of a third specification wire diameter is used to form a third layer of coils by double-wire winding and even winding. Outside the coil of the third layer of coils, a metal wire of a fourth specification wire diameter is used to form a fourth layer of coils. Outside the coil of the fourth layer of coils, a metal wire of a second specification wire diameter is used to form a fifth layer of coils by densely winding. The first layer of coils and the fourth layer of coils are used as the primary coils of the transformer, the second layer of coils and the fourth layer of coils are used as the first secondary coils of the transformer, and the third layer of coils is used as the second secondary coils of the transformer. In summary, the inductance distribution parameters of the transformer coils within the same equivalent length are more uniform, the lateral capacitance distribution within the same equivalent length is more uniform, and the capacitance distribution of the longitudinal capacitance is more uniform when each layer of coils uses the same material. In addition, the primary coil, the first secondary coil, and the first secondary coil of the transformer are composed of coils of different layers, thereby improving the anti-interference ability between the primary coil, the first secondary coil, and the second secondary coil of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A schematic diagram of a process flow of a transformer coil winding method provided by an embodiment of the present invention;

[0044] Figure 2 A schematic flow chart of another transformer coil winding method provided by an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of the structure of an isolated power supply provided by an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the structure of another isolated power supply provided by an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the structure of another isolated power supply provided by an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of the structure of another isolated power supply provided by an embodiment of the present invention;

[0049] Figure 7 A schematic diagram of the structure of another isolated power supply provided by an embodiment of the present invention;

[0050] Figure 8 A schematic diagram of the structure of another isolated power supply provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the term "comprising" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] Figure 1The present invention provides a flow chart of a transformer coil winding method, which can be applied to the winding of transformer coils. The method specifically includes the following steps:

[0054] S110, densely winding a metal wire of a first specification wire diameter to form a first layer of coils.

[0055] S120, forming a second layer of coil by densely winding a metal wire of a second specification wire diameter outside the first layer of coil.

[0056] S130, outside the turns of the second layer coil, use metal wires of a third specification wire diameter to perform double winding and even winding to form a third layer coil.

[0057] S140. A fourth layer of coil is formed by densely winding a metal wire having a fourth diameter outside the third layer of coil.

[0058] S150, outside the fourth coil, use a metal wire of a second diameter to densely wind to form a fifth coil.

[0059] S160, the first layer coil and the fifth layer coil are used as the primary coil of the transformer, the second layer coil and the fourth layer coil are used as the first secondary coil of the transformer, and the third layer coil is used as the second secondary coil of the transformer.

[0060] Among them, the coil of the transformer is wound in layers, which can make the inductance distribution parameters of each layer of coils within the same equivalent length more uniform, the lateral capacitance distribution within the same equivalent length more uniform, and the longitudinal capacitance distribution more uniform when each layer of coils uses the same material. The first layer of coils and the fourth layer of coils are used as the primary coil of the transformer, the second layer of coils and the fourth layer of coils are used as the first secondary coil of the transformer, and the third layer of coils is used as the second secondary coil of the transformer. It can be seen that the primary coil, the first secondary coil and the first secondary coil of the transformer are located in different layers, thereby improving the anti-interference ability between the primary coil, the first secondary coil and the second secondary coil of the transformer.

[0061] Exemplarily, a first layer of coils is formed by densely winding a metal wire with a wire diameter of 0.23MM; outside the first layer of coils, a second layer of coils is formed by densely winding a metal wire with a wire diameter of 0.18MM; outside the second layer of coils, a third layer of coils is formed by winding a metal wire with a wire diameter of 0.25MM in parallel and evenly; outside the third layer of coils, a fourth layer of coils is formed by densely winding a metal wire with a wire diameter of 0.16MM; outside the fourth layer of coils, a fifth layer of coils is formed by densely winding a metal wire with a wire diameter of 0.18MM; the first and fourth layer coils serve as the primary coils of the transformer, the second and fourth layer coils serve as the first secondary coils of the transformer, and the third layer coil serves as the second secondary coil of the transformer. In addition, the material of the metal wire used for winding each layer of coils is consistent, for example, copper wire can be used.

[0062] In the embodiment of the present invention, a first layer of coils is formed by densely winding a metal wire of a first specification wire diameter. Outside the coil of the first layer of coils, a metal wire of a second specification wire diameter is densely wound to form a second layer of coils. Outside the coil of the second layer of coils, a metal wire of a third specification wire diameter is used to form a third layer of coils by double-wire winding and even winding. Outside the coil of the third layer of coils, a metal wire of a fourth specification wire diameter is used to form a fourth layer of coils. Outside the coil of the fourth layer of coils, a metal wire of a second specification wire diameter is used to form a fifth layer of coils by densely winding. The first layer of coils and the fourth layer of coils are used as the primary coils of the transformer, the second layer of coils and the fourth layer of coils are used as the first secondary coils of the transformer, and the third layer of coils is used as the second secondary coils of the transformer. In summary, the inductance distribution parameters of the transformer coils within the same equivalent length are more uniform, the lateral capacitance distribution within the same equivalent length is more uniform, and the capacitance distribution of the longitudinal capacitance is more uniform when each layer of coils uses the same material. In addition, the primary coil, the first secondary coil, and the first secondary coil of the transformer are composed of coils of different layers, thereby improving the anti-interference ability between the primary coil, the first secondary coil, and the second secondary coil of the transformer.

[0063] Figure 2 A schematic diagram of a flow chart of another transformer coil winding method provided by an embodiment of the present invention, such as Figure 2 As shown, the method specifically comprises the following steps:

[0064] S210, densely winding a metal wire of a first specification wire diameter to form a first layer of coil.

[0065] S220, forming a second layer of coil by densely winding a metal wire of a second specification wire diameter outside the first layer of coil.

[0066] S230, outside the turns of the second layer coil, use metal wires of a third specification wire diameter to perform double winding and even winding to form a third layer coil.

[0067] S240, densely winding a metal wire with a fourth specification wire diameter outside the third layer coil to form a fourth layer coil.

[0068] S250, outside the fourth layer of coil, use a metal wire of the second specification wire diameter to densely wind to form a fifth layer of coil.

[0069] S260. A sixth coil is formed by densely winding a metal wire having a fifth wire diameter outside the fifth coil.

[0070] S270, the first layer coil and the fifth layer coil are used as the primary coil of the transformer, the second layer coil and the fourth layer coil are used as the first secondary coil of the transformer, the third layer coil is used as the second secondary coil of the transformer, and the sixth layer coil is used as the shielding layer of the transformer.

[0071] The sixth coil is wound on the outermost side of the remaining coils and serves as a shielding layer of the transformer. The sixth coil can reduce the anti-interference of the transformer to the radiation of external devices and prevent the radiation generated by the transformer from interfering with external devices. Exemplarily, the sixth coil is formed by densely winding a metal wire with a wire diameter of 0.15MM outside the fifth coil.

[0072] An embodiment of the present invention further provides a transformer, which includes: a magnetic core and a coil; the coil is manufactured by using the transformer coil winding method provided by any embodiment of the present invention.

[0073] Among them, the transformer includes a coil made by the transformer coil winding method provided by any embodiment of the present invention, so the transformer has the beneficial effects of the coil made by the transformer coil winding method provided by the embodiment of the present invention, which will not be repeated here.

[0074] Figure 3 A schematic diagram of the structure of an isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the isolated power supply includes: a switch module 310, a filter module 320, a power management module 330, a feedback module 340, a control module 350 and a transformer 360 provided by any embodiment of the present invention; the input end of the switch module 310 is connected to the external power supply 400, the output end of the switch module 310, the first end of the filter module 320, the first input end of the transformer 360 and the first end of the power management module 330 are connected, the second end of the filter module 320, the second input end of the transformer 360 and the first end of the control module 350 are connected, the second end of the control module 350 is connected to the second end of the power management module 330, and the first output end of the transformer 360 is connected to the The input end of the feedback module 340 is connected, the first output end of the feedback module 340 is connected to the third end of the power management module 330, and the second output end of the feedback module 340 is connected to the fourth end of the power management module 330; the switch module 310 is used to control the input of electric energy of the external power supply 400; the transformer 360 is used to output a first voltage signal and a second voltage signal according to a control signal; the filter module 320 is used to filter out the noise of the electric energy input to the transformer 360 according to the control signal; the feedback module 340 is used to generate a feedback signal according to the second voltage signal, and the power management module 330 is used to generate an adjustment signal according to the feedback signal; the control module 350 is used to generate a control signal according to the adjustment signal.

[0075] The control module 350 can generate control signals of different levels, such as a high-level control signal and a low-level control signal. The transformer 360 can control the frequency of its input power according to the control signals of different levels, thereby controlling the frequency of the output power of the transformer 360, that is, controlling the frequency of the first voltage signal and the second voltage signal output by the transformer 360.

[0076] Specifically, the working process of the isolated power supply is as follows: when the switch module 310 is turned on, the electric energy provided by the external power supply 400 is input to the transformer 360 and the power management module 330 through the switch module 310. At the moment when the transformer 360 inputs the electric energy, the transformer 360 can output the first voltage signal and the second voltage signal according to the control signal. At the same time, the filter module 320 will filter out the noise of the electric energy input to the transformer 360 according to the control signal. The feedback module 340 can generate a feedback signal according to the received second voltage signal, the power management module 330 can generate an adjustment signal according to the received feedback signal, the control module 350 can generate a control signal with a constantly changing level according to the adjustment signal, and the transformer 360 controls the frequency of its own input electric energy according to the control signals of different levels, and outputs the first voltage signal and the second voltage signal. It can be seen that the frequency adjustment of the first voltage signal and the second voltage signal output by the transformer 360 in the above process is a closed-loop control process, thereby maintaining the stability of the frequency of the first voltage signal and the second voltage signal output by the transformer 360, thereby ensuring the stability of the first voltage signal and the second voltage signal output by the transformer.

[0077] The embodiment of the present invention can constitute a single-input multi-output isolated power supply through a switch module 310, a filter module 320, a power management module 330, a feedback module 340, a control module 350 and a transformer 360. Among them, according to the characteristics of the transformer 360, the input and output of the isolated power supply can be isolated, and the output and output can be isolated, so as to achieve mutual non-interference between different voltage platforms, thereby enhancing the stability of the isolated power supply. In addition, by making the coil of the transformer 360 by the winding method of the transformer coil, the adjustment of the transformer parameters can be achieved, that is, the adjustment of the characteristics of the transformer 360 can be achieved, thereby being designed according to the specific application requirements of the isolated power supply to meet the application requirements of different powers. In summary, the isolated power supply designed in this scheme is compared with the prior art that uses multiple single-channel output isolated power supplies to overcome the high-voltage crosstalk problem between the voltage power supply systems of each platform, greatly reducing the size of the circuit design, reducing the number of components used, thereby reducing costs.

[0078] Figure 4 A schematic diagram of another isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 4As shown, the transformer also includes a second output end; the first end of the primary coil 361 serves as the first end of the transformer, the second end of the primary coil 361 serves as the second end of the transformer, the two ends of the first secondary coil 362 serve as the first output end of the transformer, and the two ends of the second secondary coil 363 serve as the second output end of the transformer.

[0079] Specifically, the first end of the primary coil 361 serves as the first end of the transformer, and the first end of the primary coil 361, the output end of the switch module 310, the first end of the filter module 320, and the first end of the power management module 330 are connected. The second end of the primary coil 361 serves as the second end of the transformer, and the second end of the primary coil 361, the second end of the filter module 320, and the first end of the control module 350 are connected. Thus, the primary coil 361 can be charged according to the control signal generated by the control module 350. The two ends of the first secondary coil 362 serve as the first output end of the transformer, and the first secondary coil 362 can output a first voltage signal according to the energy input by the primary coil 361. The two ends of the second secondary coil 363 serve as the second output end of the transformer, and the two ends of the second secondary coil 363 can output a second voltage signal according to the energy input by the primary coil 361.

[0080] Figure 5 A schematic diagram of another isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the transformer also includes a first flow control unit 364, a second flow control unit 365, a first filtering unit 367 and a second filtering unit 368; the first end of the first flow control unit 364 is connected to the first end of the first secondary coil 362, the second end of the first flow control unit 364 is connected to the first end of the first filtering unit 367, and the second end of the first secondary coil 362 is connected to the second end of the first filtering unit 367; the first flow control unit 364 is used to control the current flow direction of the first secondary coil 362, and the first filtering unit 367 is used to filter out the clutter doped in the first voltage signal; the first end of the second flow control unit 365 is connected to the first end of the second secondary coil 363, the second end of the second flow control unit 365 is connected to the first end of the second filtering unit 368, and the second end of the second secondary coil 363 is connected to the second end of the second filtering unit 368; the second flow control unit 365 is used to control the current flow direction of the second secondary coil 363, and the second filtering unit 368 is used to filter out the clutter doped in the second voltage signal.

[0081] The first flow direction control unit 364 includes a first diode D1 , the second flow direction control unit 365 includes a second diode D2 , the first filtering unit 367 includes a first capacitor C1 , and the second filtering unit 368 includes a second capacitor C2 .

[0082] Specifically, the anode of the first diode D1 is connected to the first end of the first secondary coil 362, the cathode of the first diode D1 is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is connected to the second end of the first secondary coil 362. The anode of the second diode D2 is connected to the first end of the second secondary coil 363, the cathode of the second diode D2 is connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is connected to the second end of the second secondary coil 363.

[0083] Figure 6 A schematic diagram of another isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the feedback module includes an isolated feedback unit 341, a feedback signal adjustment unit 342, a third filtering unit 343 and a voltage adjustment unit 344; the first end of the voltage adjustment unit 344 and the second end of the voltage adjustment unit 344 serve as the input end of the feedback module, the third end of the isolated feedback unit 341 serves as the first output end of the feedback module, and the fourth end of the isolated feedback unit 341 serves as the second output end of the feedback module; the first end of the voltage adjustment unit 344, the first end of the isolated feedback unit 341 and the first end of the feedback signal adjustment unit 342 are connected, and the second end of the voltage adjustment unit 344 and the second end of the feedback signal adjustment unit 342 are connected The third end of the voltage regulating unit 344, the third end of the feedback signal regulating unit 342 and the first end of the third filtering unit 343 are connected; the second end of the third filtering unit 343 is connected to the fourth end of the feedback signal regulating unit 342, and the second end of the isolated feedback unit 341 is connected to the fifth end of the feedback signal regulating unit 342; the voltage regulating unit 344 is used to adjust the input second voltage signal to obtain a feedback signal, the third filtering unit 343 is used to filter out the clutter doped in the feedback signal, the feedback signal regulating unit 342 is used to adjust the filtered feedback signal, and the isolated feedback unit 341 is used to transmit the feedback signal to the power management module 330.

[0084] Among them, the isolation feedback unit 341 includes an optocoupler relay U1, the feedback signal adjustment unit 342 includes a first resistor R1, a second resistor R2 and a voltage regulator M1, the third filtering unit 343 includes a third capacitor C3, a third resistor R3 and a fourth capacitor C4, and the voltage adjustment unit 344 includes a fourth resistor R4 and a fifth resistor R5.

[0085] Specifically, the first end of the fourth resistor R4 is used as the first end of the voltage regulating unit 344; the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5 and is used as the third end of the voltage regulating unit 344; the second end of the fifth resistor R5 is used as the second end of the voltage regulating unit 344. The first end of the first resistor R1 is used as the first end of the feedback signal regulating unit 342; the anode of the voltage regulator tube M1 is used as the second end of the feedback signal regulating unit 342; the control end of the voltage regulator tube M1 is used as the third end of the feedback signal regulating unit 342; the second end of the first resistor R1, the first end of the second resistor R2 and the cathode of the voltage regulator tube M1 are connected and are used as the fourth end of the feedback signal regulating unit 342; the second end of the second resistor R2 is used as the fifth end of the feedback signal regulating unit 342. The first pin 1 of the optocoupler relay U1 serves as the first end of the isolated feedback unit 341; the second pin 2 of the optocoupler relay U1 serves as the second end of the isolated feedback unit 341; the third pin 3 of the optocoupler relay U1 serves as the third end of the isolated feedback unit 341; the fourth pin 4 of the optocoupler relay U1 serves as the fourth end of the isolated feedback unit 341. The first end of the fourth capacitor C4 serves as the first end of the third filtering unit 343; the second end of the fourth capacitor C4, the first end of the third capacitor C3 and the first end of the third resistor R3 are connected, and the second end of the third capacitor C3 and the second end of the third resistor R3 are connected and serve as the second end of the third filtering unit 343.

[0086] Figure 7 A schematic diagram of another isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the power management module 330 includes a power management chip U2; the power management chip U2 includes a power supply terminal A1, an adjustment signal output terminal A2, a feedback signal input terminal A3 and a power supply terminal A4; the power supply terminal A1 serves as the first terminal of the power management module 330, the adjustment signal output terminal A2 serves as the second terminal of the power management module 330, the power supply terminal A4 serves as the third terminal of the power management module 330, and the feedback signal input terminal A3 serves as the fourth terminal of the power management module 330.

[0087] Among them, the power supply terminal A1 of the power management chip U2 serves as the first end of the power management module 330, that is, the power supply terminal A1 of the power management chip U2, the output end of the switch module 310, the first end of the filter module 320, and the first input end of the transformer are connected; the adjustment signal output terminal A2 of the power management chip U2 serves as the second end of the power management module 330, that is, the adjustment signal output terminal A2 of the power management chip U2 is connected to the second end of the control module 350; the power supply terminal A4 of the power management chip U2 serves as the third end of the power management module 330, that is, the power supply terminal A4 of the power management chip U2 is connected to the power supply terminal A4 of the power management chip U2; the feedback signal input terminal A3 of the power management chip U2 serves as the fourth end of the power management module 330, that is, the feedback signal input terminal A3 of the power management chip U2 is connected to the second output end of the feedback module.

[0088] Figure 8 A schematic diagram of another isolated power supply provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the control module includes a pull-down unit 351, a control unit 352 and a current limiting unit 353; the first end of the control unit 352 is connected to the first end of the pull-down unit 351 and serves as the first end of the control module, the second end of the control unit 352 serves as the second end of the control module, the third end of the control unit 352 is connected to the first end of the current limiting unit 353, and the second end of the pull-down unit 351 and the second end of the current limiting unit 353 are connected to a common ground; the pull-down unit 351 is used to pull down the potential of the first end of the control unit 352 when the control unit 352 does not receive an adjustment signal, the control unit 352 is used to generate a control signal according to the adjustment signal, and the current limiting unit 353 is used to limit the current flowing through the control unit 352.

[0089] The pull-down unit 351 includes a sixth resistor R6, the control unit 352 includes a first transistor Q1, and the current limiting unit 353 includes a seventh resistor R7. Specifically, the first electrode of the first transistor Q1 serves as the second end of the control unit 352, the control end of the first transistor Q1 serves as the first end of the control unit 352, and the second electrode of the first transistor Q1 serves as the third end of the control unit 352. The first end of the sixth resistor R6 serves as the first end of the control unit 352, the second end of the sixth resistor R6 serves as the second end of the pull-down unit 351, the first end of the seventh resistor R7 serves as the first end of the current limiting unit 353, and the second end of the seventh resistor R7 serves as the second end of the current limiting unit 353.

[0090] Optionally, continue to refer to Figure 8The input end of the switch module includes a power input end and a conduction signal input end; the switch module includes a first switch unit 311, a second switch unit 312 and a fourth filter unit 313; the first end of the first switch unit 311 is used as the conduction signal input end, the second end of the first switch unit 311, the first end of the fourth filter unit 313 and the first end of the second switch unit 312 are connected, the third end of the first switch unit 311 is grounded, the second end of the fourth filter unit 313 is grounded, the second end of the second switch unit 312 is used as the power input end, and the third end of the second switch unit 312 is used as the output end of the switch module.

[0091] When the first switch unit 311 receives a conduction signal, the first switch unit 311 can control the second switch unit 312 to conduct, thereby enabling the input of power from the external power source 400. When the first switch unit 311 does not receive a conduction signal, the first switch unit 311 can control the second switch unit 312 to be disconnected, thereby prohibiting the input of power from the external power source 400.

[0092] In addition, the first switch unit 311 includes an eighth resistor R8, a second transistor Q2 and a ninth resistor R9, the second switch unit 312 includes a tenth resistor R10 and a third transistor Q3, and the fourth filter unit 313 includes a fifth capacitor C5.

[0093] Specifically, the first end of the eighth resistor R8 serves as the first end of the first switch unit 311, the second end of the eighth resistor R8 is connected to the control end of the second transistor Q2, the second electrode of the second transistor Q2 serves as the third end of the first switch unit 311, the first electrode of the second transistor Q2 is connected to the second end of the ninth resistor R9, and the first end of the ninth resistor R9 serves as the second end of the first switch unit 311. The first end of the fifth capacitor C5 serves as the first end of the fourth filter unit 313, and the second end of the fifth capacitor C5 serves as the second end of the fourth filter unit 313. The first end of the tenth resistor R10 is connected to the control end of the third transistor Q3 and serves as the first end of the second switch; the first end of the tenth resistor R10 is connected to the first electrode of the third transistor Q3 and serves as the second end of the second switch unit 312 of the second switch; the second electrode of the third transistor Q3 serves as the third end of the second switch unit 312.

[0094] Optionally, continue to refer to Figure 8 The filtering module includes a fifth filtering unit 321 and an embedding unit 322; the first end of the fifth filtering unit 321 serves as the first end of the filtering module, the second end of the fifth filtering unit 321 is connected to the second end of the embedding unit 322, and the first end of the embedding unit 322 serves as the second end of the filtering module.

[0095] The fifth filtering unit 321 includes a sixth capacitor C6 and an eleventh resistor R11, and the clamping unit 322 includes a third diode D3. Specifically, the first end of the sixth capacitor C6 is connected to the first end of the eleventh resistor R11 and serves as the first end of the fifth filtering unit 321; the second end of the sixth capacitor C6 is connected to the second end of the eleventh resistor R11 and serves as the second end of the fifth filtering unit 321. The anode of the third diode D3 serves as the second end of the clamping unit 322, and the cathode of the third diode D3 serves as the first end of the clamping unit 322.

[0096] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0097] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An isolated power supply, characterized in that: include: Switch module, filter module, power management module, feedback module, control module and transformer; The transformer comprises: a magnetic core and a coil; The coil is made by a transformer coil winding method; The transformer coil winding method comprises: A first layer of coils is formed by densely winding a metal wire of a first specification wire diameter; A second layer of coil is formed by densely winding a metal wire with a second wire diameter outside the first layer of coil; A third layer of coils is formed by winding a metal wire of a third specification wire diameter in parallel and evenly outside the second layer of coils; A fourth layer of coil is formed by densely winding a metal wire with a fourth wire diameter outside the third layer of coil; A fifth coil is formed by densely winding metal wires of the second specification wire diameter outside the fourth coil; The first layer coil and the fifth layer coil are used as the primary coil of the transformer, the second layer coil and the fourth layer coil are used as the first secondary coil of the transformer, and the third layer coil is used as the second secondary coil of the transformer; The input end of the switch module is connected to an external power supply, the output end of the switch module, the first end of the filter module, the first input end of the transformer and the first end of the power management module are connected, the second end of the filter module, the second input end of the transformer and the first end of the control module are connected, the second end of the control module is connected to the second end of the power management module, the first output end of the transformer is connected to the input end of the feedback module, the first output end of the feedback module is connected to the third end of the power management module, and the second output end of the feedback module is connected to the fourth end of the power management module; The switch module is used to control the input of the external power supply electric energy; the transformer is used to output a first voltage signal and a second voltage signal according to a control signal; the filter module is used to filter out the noise of the electric energy input to the transformer according to the control signal; the feedback module is used to generate a feedback signal according to the second voltage signal, and the power management module is used to generate an adjustment signal according to the feedback signal; the control module is used to generate the control signal according to the adjustment signal.

2. The isolated power supply according to claim 1, characterized in that: After forming the fifth layer of coil, the transformer coil winding method further comprises: A sixth coil is formed by densely winding a metal wire with a fifth wire diameter outside the fifth coil; The sixth coil serves as a shielding layer of the transformer.

3. The isolated power supply according to claim 1, characterized in that: The transformer also includes a second output terminal; The first end of the primary coil serves as the first end of the transformer, the second end of the primary coil serves as the second end of the transformer, the two ends of the first secondary coil serve as the first output end of the transformer, and the two ends of the second secondary coil serve as the second output end of the transformer.

4. The isolated power supply according to claim 1, characterized in that: The transformer further includes a first flow direction control unit, a second flow direction control unit, a first filtering unit and a second filtering unit; A first end of the first flow direction control unit is connected to a first end of the first secondary coil, a second end of the first flow direction control unit is connected to a first end of the first filter unit, and a second end of the first secondary coil is connected to a second end of the first filter unit; The first flow direction control unit is used to control the current flow direction of the first secondary coil, and the first filtering unit is used to filter out clutter doped in the first voltage signal; A first end of the second flow direction control unit is connected to a first end of the second secondary coil, a second end of the second flow direction control unit is connected to a first end of the second filtering unit, and a second end of the second secondary coil is connected to a second end of the second filtering unit; The second flow direction control unit is used to control the current flow direction of the second secondary coil, and the second filtering unit is used to filter out clutter mixed in the second voltage signal.

5. The isolated power supply according to claim 1, characterized in that: The feedback module includes an isolation feedback unit, a feedback signal adjustment unit, a third filtering unit and a voltage adjustment unit; The first end of the voltage regulating unit and the second end of the voltage regulating unit serve as input ends of the feedback module, the third end of the isolated feedback unit serves as a first output end of the feedback module, and the fourth end of the isolated feedback unit serves as a second output end of the feedback module; The first end of the voltage regulating unit, the first end of the isolation feedback unit and the first end of the feedback signal regulating unit are connected, the second end of the voltage regulating unit and the second end of the feedback signal regulating unit are connected, the third end of the voltage regulating unit, the third end of the feedback signal regulating unit and the first end of the third filtering unit are connected; the second end of the third filtering unit and the fourth end of the feedback signal regulating unit are connected, and the second end of the isolation feedback unit and the fifth end of the feedback signal regulating unit are connected; The voltage regulating unit is used to adjust the input second voltage signal to obtain a feedback signal, the third filtering unit is used to filter out the clutter in the feedback signal, the feedback signal adjusting unit is used to adjust the feedback signal after filtering, and the isolated feedback unit is used to transmit the feedback signal to the power management module.

6. The isolated power supply according to claim 1, characterized in that: The power management module includes a power management chip; The power management chip includes a power supply terminal, an adjustment signal output terminal, a feedback signal input terminal and a power supply terminal; The power supply end serves as the first end of the power management module, the adjustment signal output end serves as the second end of the power management module, the power supply end serves as the third end of the power management module, and the feedback signal input end serves as the fourth end of the power management module.

7. The isolated power supply according to claim 1, characterized in that: The control module includes a pull-down unit, a control unit and a current limiting unit; The first end of the control unit is connected to the first end of the pull-down unit and serves as the first end of the control module, the second end of the control unit serves as the second end of the control module, the third end of the control unit is connected to the first end of the current limiting unit, and the second end of the pull-down unit and the second end of the current limiting unit are connected to a common ground; The pull-down unit is used to pull down the potential of the first terminal of the control unit when the control unit does not receive the adjustment signal, the control unit is used to generate the control signal according to the adjustment signal, and the current limiting unit is used to limit the current flowing through the control unit.

8. The isolated power supply according to claim 1, characterized in that: The input end of the switch module includes a power input end and a conduction signal input end; The switch module includes a first switch unit, a second switch unit and a fourth filter unit; The first end of the first switch unit is used as the conduction signal input end, the second end of the first switch unit, the first end of the fourth filter unit and the first end of the second switch unit are connected, the third end of the first switch unit is grounded, the second end of the fourth filter unit is grounded, the second end of the second switch unit is used as the power input end, and the third end of the second switch unit is used as the output end of the switch module; The filtering module includes a fifth filtering unit and a clamping unit; The first end of the fifth filtering unit serves as the first end of the filtering module, the second end of the fifth filtering unit is connected to the second end of the clamping unit, and the first end of the clamping unit serves as the second end of the filtering module.

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