Power supply circuit and power supply method

Abstract

The invention provides a power supply circuit and a power supply method. The power supply circuit comprises a winding group, a first energy storage module, a second energy storage module, a first switch tube and a second switch tube, the output end of the winding group is electrically connected with the input end of the first energy storage module; the output end of the first energy storage module is electrically connected with the first switch tube and the second switch tube. And the second switch tube is also electrically connected with the second energy storage module and is used for outputting power supply voltage. According to the power supply circuit provided by the embodiment of the invention, power supply can be realized through one winding group, so that the circuit cost is reduced; in addition, the power supply circuit provided by the embodiment of the invention adopts fewer components, and the circuit structure is simpler. In addition, when the winding group outputs high voltage, the first energy storage circuit discharges along with the winding group, so that the voltage fluctuation is reduced, and the power supply efficiency is further improved.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a power supply circuit and a power supply method. Background Art

[0002] The resonant circuit needs power during operation, and the voltage output by the transformer is usually used to power the resonant circuit. In the prior art, the power supply circuit for powering the resonant circuit includes two winding groups, and the transformer output voltage is adjusted through the two winding groups and the components matched with the two winding groups to achieve the purpose of power supply.

[0003] However, the existing circuit requires two winding sets of the transformer and components matching the winding sets, which increases the circuit cost and makes the structure of the power supply circuit more complicated. Summary of the invention

[0004] The main purpose of the present application is to provide a power supply circuit and a power supply method, aiming to solve the technical problems of the existing power supply circuit having high cost and complex structure.

[0005] To achieve the above-mentioned object, the present application provides a power supply circuit, including a winding group, a first energy storage module, a second energy storage module, a first switch tube and a second switch tube;

[0006] The output end of the winding group is electrically connected to the input end of the first energy storage module;

[0007] The output end of the first energy storage module is electrically connected to the first switch tube and the second switch tube respectively;

[0008] The second switch tube is also electrically connected to the second energy storage module, and the second switch tube is used to output a power supply voltage;

[0009] Wherein, when the winding group outputs a negative voltage, the first switch tube is turned on, the second switch tube is turned off, and the winding group charges the first energy storage module through the first switch tube;

[0010] When the winding group outputs high voltage, the first switch tube is turned off, the second switch tube is turned on, the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

[0011] Optionally, the first energy storage module includes a first capacitor and a second capacitor;

[0012] The output end of the winding group is electrically connected to a first connection point, and the first connection point is located between the first end of the first capacitor and the first end of the second capacitor;

[0013] The second end of the second capacitor is electrically connected to the first switch tube;

[0014] The second switch tube is electrically connected to a second connection point, and the second connection point is located between the second end of the first capacitor and the second end of the second capacitor.

[0015] Optionally, the first switch tube is a first diode;

[0016] An anode of the first diode is grounded, and a cathode of the first diode is electrically connected to a second end of the second capacitor.

[0017] Optionally, the second switch tube is a second diode;

[0018] An anode of the second diode is electrically connected to the second connection point, and a cathode of the second diode is electrically connected to the second energy storage module.

[0019] Optionally, the second energy storage module includes an electrolytic capacitor;

[0020] A first end of the electrolytic capacitor is grounded, and a second end of the electrolytic capacitor is electrically connected to the second switch tube.

[0021] Optionally, the power supply circuit further includes a third capacitor;

[0022] A first end of the third capacitor is grounded, a second end of the third capacitor is electrically connected to a third connection point, and the third connection point is located between the second switch tube and the second energy storage module.

[0023] Optionally, the power supply circuit further includes a protection module;

[0024] The protection module is located between the output end of the winding coil and the first energy storage module;

[0025] Wherein, the protection module is used to control the instantaneous current output by the winding coil.

[0026] Optionally, the protection module includes a first resistor;

[0027] The first end of the first resistor is electrically connected to the winding group, and the first end of the first resistor is electrically connected to the input end of the first energy storage module.

[0028] Optionally, the protection module further includes a second resistor;

[0029] The first end of the second resistor is electrically connected to the first end of the first resistor, the second end of the second resistor is electrically connected to the second end of the first resistor, and the second end of the second resistor is also electrically connected to the first energy storage module.

[0030] In addition, to achieve the above object, the present application also provides a power supply method, which is applied to the power supply circuit as described above, and the method includes:

[0031] When the winding group outputs a negative voltage, the first switch tube is turned on and the second switch tube is turned off, so that the winding group charges the first energy storage module through the first switch tube;

[0032] When the winding group outputs high voltage, the first switch tube is turned off and the second switch tube is turned on, so that the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

[0033] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0034] The present application provides a power supply circuit and a power supply method, wherein the power supply circuit comprises: a winding group, a first energy storage module, a second energy storage module, a first switch tube and a second switch tube; the output end of the winding group is electrically connected to the input end of the first energy storage module; the output end of the first energy storage module is electrically connected to the first switch tube and the second switch tube respectively; the second switch tube is also electrically connected to the second energy storage module, and the second switch tube is used to output a power supply voltage; wherein, when the winding group outputs a negative voltage, the first switch tube is turned on, the second switch tube is turned off, and the winding group charges the first energy storage module through the first switch tube; when the winding group outputs a high voltage, the first switch tube is turned off, the second switch tube is turned on, the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the power supply voltage is output. The power supply circuit provided in the embodiment of the present application can realize power supply through a winding group, thereby reducing the circuit cost; and the power supply circuit provided in the embodiment of the present application uses fewer components, and the circuit structure is relatively simple. In addition, when the winding group outputs a high voltage, the first energy storage circuit discharges following the winding group, thereby reducing voltage fluctuations and improving power supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 is one of the circuit diagrams of the power supply circuit provided in the embodiment of the present application;

[0037] Figure 2 This is the second circuit diagram of the power supply circuit provided in the embodiment of the present application;

[0038] Figure 3It is a flow chart of the power supply method provided in an embodiment of the present application. Description of the drawings:

[0040] 10. Winding group; 20. First energy storage module; 30. Second energy storage module; 40. First switch tube; 50. Second switch tube; C1. First capacitor; C2. Second capacitor; D1. First diode; D2. Second diode; EC. Electrolytic capacitor; C3. Third capacitor; R1. First resistor; R2. Second resistor; P1. First connection point; P2. Second connection point; P3. Third connection point. DETAILED DESCRIPTION

[0041] All technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0044] like Figure 1 As shown, the present application provides a power supply circuit, including a winding group 10, a first energy storage module 20, a second energy storage module 30, a first switch tube 40 and a second switch tube 50;

[0045] The output end of the winding group 10 is electrically connected to the input end of the first energy storage module 20;

[0046] The output end of the first energy storage module 20 is electrically connected to the first switch tube 40 and the second switch tube 50 respectively;

[0047] The second switch tube 50 is also electrically connected to the second energy storage module 30 , and the second switch tube 50 is used to output a supply voltage.

[0048] The working principle of the power supply circuit provided in this embodiment is that when the winding group 10 outputs a negative voltage, the first switch tube 40 is turned on, the second switch tube 50 is turned off, and the winding group 10 outputs a negative voltage through the first switch tube 40 to charge the first energy storage module 20. When the winding group 10 outputs a high voltage, the first switch tube 40 is turned off, the second switch tube 50 is turned on, the first energy storage circuit is discharged, the second energy storage module 30 is charged through the second switch tube 50, and the power supply voltage is output.

[0049] The voltage output by the winding group 10 is related to the number of winding coils.

[0050] The power supply circuit provided in the embodiment of the present application can realize power supply through a winding group 10, thereby reducing the circuit cost; and the power supply circuit provided in the embodiment of the present application uses fewer components and has a relatively simple circuit structure. In addition, when the winding group 10 outputs high voltage, the first energy storage circuit discharges with the winding group 10, thereby reducing voltage fluctuations and improving power supply efficiency.

[0051] In addition, the output supply voltage can be controlled between 12V-18V.

[0052] Optionally, the first energy storage module 20 includes a first capacitor C1 and a second capacitor C2;

[0053] The output end of the winding group 10 is electrically connected to a first connection point P1, and the first connection point P1 is located between the first end of the first capacitor C1 and the first end of the second capacitor C2;

[0054] The second end of the second capacitor C2 is electrically connected to the first switch tube 40;

[0055] The second switch tube 50 is electrically connected to a second connection point P2 , and the second connection point P2 is located between the second end of the first capacitor C1 and the second end of the second capacitor C2 .

[0056] like Figure 2 As shown, in this embodiment, the first energy storage module 20 includes two capacitors, namely a first capacitor C1 and a second capacitor C2. When the winding group 10 outputs a negative voltage, the first capacitor C1 and the second capacitor C2 are in a charging state; when the winding group 10 outputs a high voltage, the first capacitor C1 and the second capacitor C2 are in a discharging state.

[0057] Optionally, the first switch tube 40 is a first diode D1;

[0058] An anode of the first diode D1 is grounded, and a cathode of the first diode D1 is electrically connected to a second end of the second capacitor C2.

[0059] Optionally, the second switch tube 50 is a second diode D2;

[0060] An anode of the second diode D2 is electrically connected to the second connection point P2 , and a cathode of the second diode D2 is electrically connected to the second energy storage module 30 .

[0061] like Figure 2 As shown, in this embodiment, the first switch tube 40 is a first diode D1, and the second switch tube 50 is a second diode D2, wherein the anode of the first diode D1 is grounded.

[0062] exist Figure 2 In the circuit diagram shown, when the winding group 10 outputs a negative voltage, the first diode D1 is turned on and the second diode D2 is turned off. When the winding group 10 outputs a high voltage, the first diode D1 is turned off and the second diode D2 is turned off.

[0063] Optionally, the second energy storage module 30 includes an electrolytic capacitor EC;

[0064] A first end of the electrolytic capacitor EC is grounded, and a second end of the electrolytic capacitor EC is electrically connected to the second switch tube 50 .

[0065] like Figure 2 As shown, the second energy storage module 30 includes an electrolytic capacitor EC. When the winding group 10 outputs high voltage, the first switch tube 40 is turned off and the second switch tube 50 is turned on, the first energy storage circuit discharges and the electrolytic capacitor EC is charged through the second switch tube 50.

[0066] Optionally, the power supply circuit further includes a third capacitor C3;

[0067] A first end of the third capacitor C3 is grounded, a second end of the third capacitor C3 is electrically connected to a third connection point P3 , and the third connection point P3 is located between the second switch tube 50 and the second energy storage module 30 .

[0068] like Figure 2 As shown, the power supply circuit further includes a third capacitor C3.

[0069] When the winding group 10 outputs high voltage, the first switch tube 40 is turned off, the second switch tube 50 is turned on, the first energy storage circuit is discharged, and the electrolytic capacitor EC is charged through the second switch tube 50. In this case, the charging efficiency of the electrolytic capacitor EC is the sum of the ratio of the first value to the second value and the pressure difference ratio of the electrolytic capacitor EC; wherein the first value is the sum of the capacitance value of the first capacitor C1 and the capacitance value of the second capacitor C2, and the second value is the sum of the capacitance value of the electrolytic capacitor EC and the capacitance value of the third capacitor C3. It can be expressed by the following formula:

[0070] (C11+C21) / (EC1+C31)+ΔP

[0071] Wherein, C11 represents the capacitance value of the first capacitor C1, C21 represents the capacitance value of the second capacitor C2, EC1 represents the capacitance value of the electrolytic capacitor EC, C31 represents the capacitance value of the third capacitor C3, and ΔP represents the voltage difference ratio of the electrolytic capacitor EC.

[0072] Optionally, the power supply circuit further includes a protection module;

[0073] The protection module is located between the output end of the winding coil and the first energy storage module 20;

[0074] Wherein, the protection module is used to control the instantaneous current output by the winding coil.

[0075] Optionally, the protection module includes a first resistor R1;

[0076] The first end of the first resistor R1 is electrically connected to the winding group 10 , and the first end of the first resistor R1 is electrically connected to the input end of the first energy storage module 20 .

[0077] Optionally, the protection module further includes a second resistor R2;

[0078] The first end of the second resistor R2 is electrically connected to the first end of the first resistor R1 , the second end of the second resistor R2 is electrically connected to the second end of the first resistor R1 , and the second end of the second resistor R2 is also electrically connected to the first energy storage module 20 .

[0079] like Figure 2 As shown, the power supply circuit further includes a protection module. Optionally, the protection module includes two resistors connected in parallel, namely, a first resistor R1 and a second resistor R2 connected in parallel.

[0080] In this embodiment, by providing a first resistor R1 and a second resistor R2 connected in parallel, the instantaneous charging current is controlled to prevent the circuit from being damaged.

[0081] like Figure 3 As shown, the present application provides a power supply method, which is applied to the power supply circuit as described above, and the method includes:

[0082] S310, when the winding group outputs a negative voltage, turning on the first switch tube and turning off the second switch tube, so that the winding group charges the first energy storage module through the first switch tube.

[0083] In this step, when the winding group outputs a negative voltage, the first switch tube is turned on and the second switch tube is turned off, so that the winding group charges the first energy storage module through the first switch tube.

[0084] Optionally, the first switch tube and the second switch tube are both diodes, that is, the first switch tube is a first diode, and the second switch tube is a second diode. The first energy storage module includes two capacitors connected in parallel.

[0085] S320, when the winding group outputs high voltage, the first switch tube is turned off and the second switch tube is turned on, so that the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

[0086] In this step, when the winding group outputs high voltage, the first switch tube is turned off and the second switch tube is turned on, so that the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

[0087] Optionally, the second energy storage module includes an electrolytic capacitor.

[0088] In this step, the supply voltage can be adjusted by debugging the first energy storage module. Optionally, the output supply voltage can be controlled between 12V-18V.

[0089] The power supply circuit provided in the embodiment of the present application can realize power supply through a winding group, thereby reducing the circuit cost; and the power supply circuit provided in the embodiment of the present application uses fewer components and has a relatively simple circuit structure. In addition, when the winding group outputs high voltage, the first energy storage circuit discharges with the winding group, thereby reducing voltage fluctuations and improving power supply efficiency.

[0090] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A power supply circuit, characterized in that: It includes a winding group, a first energy storage module, a second energy storage module, a first switch tube and a second switch tube; The output end of the winding group is electrically connected to the input end of the first energy storage module; The output end of the first energy storage module is electrically connected to the first switch tube and the second switch tube respectively; The second switch tube is also electrically connected to the second energy storage module, and the second switch tube is used to output a power supply voltage; Wherein, when the winding group outputs a negative voltage, the first switch tube is turned on, the second switch tube is turned off, and the winding group charges the first energy storage module through the first switch tube; When the winding group outputs high voltage, the first switch tube is turned off, the second switch tube is turned on, the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

2. The power supply circuit according to claim 1, characterized in that: The first energy storage module includes a first capacitor and a second capacitor; The output end of the winding group is electrically connected to a first connection point, and the first connection point is located between the first end of the first capacitor and the first end of the second capacitor; The second end of the second capacitor is electrically connected to the first switch tube; The second switch tube is electrically connected to a second connection point, and the second connection point is located between the second end of the first capacitor and the second end of the second capacitor.

3. The power supply circuit according to claim 2, characterized in that: The first switch tube is a first diode; An anode of the first diode is grounded, and a cathode of the first diode is electrically connected to a second end of the second capacitor.

4. The power supply circuit according to claim 2, characterized in that: The second switch tube is a second diode; An anode of the second diode is electrically connected to the second connection point, and a cathode of the second diode is electrically connected to the second energy storage module.

5. The power supply circuit according to claim 1, characterized in that: The second energy storage module includes an electrolytic capacitor; A first end of the electrolytic capacitor is grounded, and a second end of the electrolytic capacitor is electrically connected to the second switch tube.

6. The power supply circuit according to claim 1, characterized in that: The power supply circuit also includes a third capacitor; A first end of the third capacitor is grounded, a second end of the third capacitor is electrically connected to a third connection point, and the third connection point is located between the second switch tube and the second energy storage module.

7. The power supply circuit according to claim 1, characterized in that: The power supply circuit also includes a protection module; The protection module is located between the output end of the winding coil and the first energy storage module; Wherein, the protection module is used to control the instantaneous current output by the winding coil.

8. The power supply circuit according to claim 7, characterized in that: The protection module includes a first resistor; The first end of the first resistor is electrically connected to the winding group, and the first end of the first resistor is electrically connected to the input end of the first energy storage module.

9. The power supply circuit according to claim 8, characterized in that: The protection module also includes a second resistor; The first end of the second resistor is electrically connected to the first end of the first resistor, the second end of the second resistor is electrically connected to the second end of the first resistor, and the second end of the second resistor is also electrically connected to the first energy storage module.

10. A power supply method, characterized in that: The power supply method is applied to the power supply circuit according to any one of claims 1 to 9, and the method comprises: When the winding group outputs a negative voltage, the first switch tube is turned on and the second switch tube is turned off, so that the winding group charges the first energy storage module through the first switch tube; When the winding group outputs high voltage, the first switch tube is turned off and the second switch tube is turned on, so that the first energy storage circuit is discharged, the second energy storage module is charged through the second switch tube, and the supply voltage is output.

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