Power supply integrated circuit

Abstract

The utility model discloses a power supply integrated circuit, which relates to the field of power supply, and is provided with a first switch, a second switch, a third switch, a controller and a multi-channel transformer, when the controller controls the first switch, the second switch and the third switch to be turned on at the same time, the photovoltaic power supply, the battery and the alternating current power supply module can supply power to electric equipment through the multi-channel transformer; the photovoltaic power supply, the battery and the AC power supply module with the maximum output voltage can supply power to the electric equipment through the corresponding switch and the multi-channel transformer, and the power supply integrated circuit adopted by the utility model is only provided with one transformer and one controller, so that the size and the cost of the power supply circuit are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of power supply, in particular to a power supply integrated circuit. Background Art

[0002] At present, the power supply integrated circuit is input by multiple power sources such as batteries, photovoltaic power supplies, and power grids, and several power supplies are isolated. In the power supply integrated circuit, it is necessary to be able to realize that multiple power supplies can power the electrical equipment. In the current general scheme, the power supply integrated circuit is composed of a battery auxiliary power module, a photovoltaic power auxiliary module, and an AC power auxiliary module. The battery, photovoltaic power supply, and AC power supply are respectively controlled by the battery auxiliary power module, the photovoltaic power auxiliary module, the AC power auxiliary module and their corresponding controllers to realize voltage conversion and finally complete the power supply to the electrical equipment. However, this scheme is costly and bulky, which is not conducive to the miniaturization of the product. Utility Model Content

[0003] The purpose of the utility model is to provide a power supply integrated circuit, in which photovoltaic power, battery and alternating current are used to supply power to electrical equipment through a multi-channel transformer. The power supply integrated circuit used in the present application is only provided with a transformer and a controller, which greatly reduces the volume and cost of the power supply circuit.

[0004] In order to solve the above technical problems, the utility model provides a power supply integrated circuit, comprising: a first switch, a second switch, a third switch, a controller, and a multi-channel transformer;

[0005] The first switch and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source;

[0006] The second switch and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery;

[0007] The third switch and the third primary winding of the multi-channel transformer are connected in series at both ends of the AC power supply module;

[0008] The controller is respectively connected to the control end of the first switch, the control end of the second switch and the control end of the third switch;

[0009] The multi-channel transformer, the two ends of the secondary winding of the multi-channel transformer are connected to the electrical equipment.

[0010] Optionally, also include:

[0011] A voltage acquisition module, wherein the acquisition end of the voltage acquisition module is connected to the first end of the secondary winding of the multi-channel transformer, and the output end is connected to the controller, and is used to acquire the voltage value on the secondary winding.

[0012] Optionally, the AC power supply module includes a rectifier module and an AC power supply, and an input end of the rectifier module is connected in parallel with the AC power supply to convert the AC voltage output by the AC power supply into a corresponding DC voltage.

[0013] Optionally, also include:

[0014] A first anti-reverse module, wherein the first anti-reverse module, the first switch and the first primary winding of the multi-channel transformer are connected in series at two ends of the photovoltaic power source;

[0015] A second reverse anti-reverse module, wherein the second reverse anti-reverse module, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery;

[0016] A third anti-reverse module is connected to the first end of the secondary winding of the multi-channel transformer.

[0017] Optionally, the first anti-reverse module is a first diode, and the first diode, the first switch and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source;

[0018] The second anti-reverse module is a second diode, and the second diode, the second switch, and the second primary winding of the multi-channel transformer are connected in series at both ends of the battery;

[0019] The third anti-reverse module is a third diode, and the third diode is connected to the first end of the secondary winding of the multi-channel transformer.

[0020] Optionally, also include:

[0021] A first current limiting module, wherein the first current limiting module, the first switch and the first primary winding of the multi-channel transformer are connected in series at two ends of the photovoltaic power source;

[0022] A second current limiting module, wherein the second current limiting module, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery;

[0023] A third current limiting module, the third current limiting module, the third switch and the third primary winding of the multi-channel transformer are connected in series at both ends of the AC power supply module.

[0024] Optionally, the first current limiting module is a first resistor, and the first resistor, the first switch and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source;

[0025] The second current limiting module is a second resistor, and the second resistor, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery;

[0026] The third current limiting module is a third resistor. The third resistor, the third switch and the third primary winding of the multi-channel transformer are connected in series at two ends of the AC power supply module.

[0027] Optionally, also include:

[0028] A filter module, wherein a first end of the filter module is respectively connected to a first end of the secondary winding of the multi-channel transformer and the electrical device, and a second end of the filter module is respectively connected to a second end of the secondary winding of the multi-channel transformer and a ground wire.

[0029] Optionally, the filtering module is a capacitor, a first end of the capacitor is respectively connected to the first end of the secondary winding of the multi-channel transformer and the electrical device, and a second end is respectively connected to the second end of the secondary winding of the multi-channel transformer and a ground wire.

[0030] To solve the above technical problems, the utility model also provides a power supply integrated system, including: a photovoltaic power supply, a battery, an AC power supply module and the power supply integrated circuit as described above, wherein the power supply integrated circuit is respectively connected to the photovoltaic power supply, the battery and the AC power supply module.

[0031] The purpose of the utility model is to provide a power supply integrated circuit, which is provided with a first switch, a second switch, a third switch, a controller, a rectifier module, and a multi-channel transformer. The rectifier module can convert the AC voltage of the AC power supply into a corresponding DC voltage, wherein the controller controls the opening or disconnection of the first switch, the second switch and the third switch respectively. When the corresponding switches are turned on, the photovoltaic power supply, the battery and the AC power will supply power to the electrical equipment through the multi-channel transformer. In addition, the power supply integrated circuit used in the present application is only provided with a transformer and a controller, which greatly reduces the volume and cost of the power supply circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a power supply integrated circuit provided by the utility model;

[0034] Figure 2 A schematic diagram of the structure of another power supply integrated circuit provided by the utility model;

[0035] Figure 3 A schematic diagram of power supply control provided by the utility model. DETAILED DESCRIPTION

[0036] The core of the utility model is to provide a power supply integrated circuit. Photovoltaic power, battery and alternating current will supply power to electrical equipment through a multi-channel transformer. The power supply integrated circuit used in this application only has one transformer and controller, which greatly reduces the size and cost of the power supply circuit.

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a power supply integrated circuit provided by the utility model. It includes: a first switch 1, a second switch 2, a third switch 3, a controller 4, and a multi-channel transformer 5;

[0039] The first switch 1 and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source;

[0040] The second switch 2 and the second primary winding of the multi-channel transformer are connected in series to both ends of the battery;

[0041] The third switch 3 and the third primary winding of the multi-channel transformer are connected in series to both ends of the AC power supply module;

[0042] The controller 4 is respectively connected to the control end of the first switch, the control end of the second switch and the control end of the third switch;

[0043] The two ends of the secondary winding of the multi-channel transformer 5 are connected to the electrical equipment.

[0044] In the present utility model, in order to realize the transmission of electric energy output by multiple power sources to the electric equipment, when the power supply is a photovoltaic power source, a battery and an AC power source, a first switch 1, a second switch 2, a third switch 3, a controller 4 and a multi-channel transformer 5 are provided in the power supply integrated circuit, wherein the controller 4 controls the conduction of the first switch 1, the second switch 2 and the third switch 3 respectively. When the controller 4 controls the first switch 1, the second switch 2 and the third switch 3 to be turned on, if the photovoltaic power source has the largest output voltage among the photovoltaic power source, the battery and the AC power source module, then the circuit for supplying power to the electric equipment through the voltage transformation of the multi-channel transformer 5 should be the photovoltaic power source, the first switch 1, the multi-channel transformer 5. The first primary winding, the secondary winding of the multi-channel transformer 5, and the electrical equipment; on the contrary, if the battery has the largest output voltage among the photovoltaic power supply, the battery, and the AC power supply module, then the circuit for supplying power to the electrical equipment through the voltage transformation of the multi-channel transformer 5 should be the battery, the second switch 2, the second primary winding of the multi-channel transformer 5, the secondary winding of the multi-channel transformer 5, and the electrical equipment; if the AC power supply module has the largest output voltage among the photovoltaic power supply, the battery, and the AC power supply module, then the circuit for supplying power to the electrical equipment through the voltage transformation of the multi-channel transformer 5 should be the AC power supply module, the third switch 3, the third primary winding of the multi-channel transformer 5, the secondary winding of the multi-channel transformer 5, and the electrical equipment. In addition, the power supply integrated circuit used in this application only has one multi-channel transformer 5 and a controller 4, and realizes multi-isolated power input through the coupling integration of the multi-channel transformer 5. Compared with the traditional power supply scheme, the circuit components are greatly reduced, the volume is reduced, and the system cost is reduced.

[0045] It should be noted that the present invention adopts a coupling transformer solution, such as Figure 2 As shown, multiple isolated power inputs can be realized to power electrical equipment. Only one controller 4 is needed to realize multiple power supplies to power electrical equipment. Secondly, diodes D3, D4, and D5 all have the function of preventing current from flowing back into the input power supply. According to the principle of diode conduction, when the power supply with a high voltage is connected, the corresponding diode is in the on state, and the other diodes are in the off state, realizing automatic energy distribution. Controller 4 can use the traditional flyback power supply control solution, which will not be described in detail here. The following is an explanation of the three-port input: when Figure 2 When Q1 (first switch 1), Q2 (second switch 2), and Q3 (third switch 3) are turned on at the same time, the working mode is as follows Figure 3 As shown, Figure 3Where D1, D2, D3, and Do are all diodes, UDC1 is the voltage corresponding to DC1 (photovoltaic power source), UDC2 is the voltage corresponding to DC2 (battery), and UDC3 is the voltage corresponding to DC3 (AC power module). NP1, NP2, and NP3 are the first primary winding, the second primary winding, and the third primary winding, respectively. Lm is the excitation inductance corresponding to the transformer, and Lp1, Lp2, and Lp3 are the leakage inductances of the corresponding windings, respectively:

[0046] Set the number of turns of each primary winding to be the same: Np1 = Np2 = Np3 = n----------------①;

[0047] Since the number of winding turns is the same, Lp1≈Lp2≈Lp3------------------------②;

[0048] During the on-time Ton, there is the following formula:

[0049] UAB=UCD=UEF-----------------③;

[0050] Itx=Ip2=Ip3----------------------④;

[0051] Ip1=(UDC1-UAB) / Lp1*Ton----------⑤;

[0052] Im=UAB / Lm*Ton----------------------⑥;

[0053] Ip2=(UDC2-UCD) / Lp2*Ton----------⑦;

[0054] Ip3=(UDC3-UEF) / Lp3*Ton----------⑧;

[0055] Ip1+Itx=Im--------------------------------⑨;

[0056] It should also be noted that according to the general process of the transformer, Lp1, Lp2 and Lp3 are much smaller than Lm. According to the unidirectional conduction characteristics of the diode, Ip1≥0, Ip2≥0, Ip3≥0. When UDC1>UDC2, UDC1>UDC3, then Ip1>>Ip2, Ip1>>Ip3; Based on the above, it can be obtained that the current of the UDC input with the highest voltage is much greater than that of the other two.

[0057] It should also be noted that the winding with the largest number of turns among the first primary winding, the second primary winding, and the third primary winding of the multi-channel transformer 5 has the highest operating voltage of the corresponding power supply branch, but the present application does not specifically limit the number of turns of the first primary winding, the second primary winding, and the third primary winding, and the number of turns of the first primary winding, the second primary winding, and the third primary winding is determined by actual needs.

[0058] The present embodiment provides a power supply integrated circuit, which is provided with a first switch 1, a second switch 2, a third switch 3, a controller 4, and a multi-channel transformer 5, wherein the controller 4 controls the opening or disconnection of the first switch 1, the second switch 2, and the third switch 3 respectively. When the corresponding switches are turned on, the photovoltaic power supply, the battery, and the AC power supply module can supply power to the electrical equipment through the multi-channel transformer 5. In addition, when the controller 4 controls the first switch 1, the second switch 2, and the third switch 3 to be turned on at the same time, the photovoltaic power supply, the battery, and the AC power supply module with the largest output voltage will supply power to the electrical equipment through the corresponding switch and the multi-channel transformer 5. The power supply integrated circuit used in the present application is only provided with one transformer and a controller 4, which greatly reduces the volume and cost of the power supply circuit.

[0059] As an optional embodiment, it also includes:

[0060] A voltage acquisition module, wherein the acquisition end of the voltage acquisition module is connected to the first end of the secondary winding of the multi-channel transformer 5, and the output end is connected to the controller 4, and is used to acquire the voltage value on the secondary winding.

[0061] In the utility model, a voltage acquisition module is also provided in the power supply integrated circuit. The function of the voltage acquisition module is to collect the voltage value on the secondary winding of the multi-channel transformer 5 and transmit the collected voltage value to the controller 4, so that the controller 4 can control the opening and closing of the first switch 1, the second switch 2 and the third switch 3 according to the collected voltage value, so as to improve the stability of the transformed voltage of the multi-channel transformer 5.

[0062] It should be noted that the voltage acquisition module may be a voltage divider circuit or a voltage acquisition device such as a voltmeter.

[0063] As an optional embodiment, the AC power supply module includes a rectifier module and an AC power supply, and an input end of the rectifier module is connected in parallel with the AC power supply to convert the AC voltage output by the AC power supply into a corresponding DC voltage.

[0064] In the utility model, the AC power supply module includes a rectifier module and an AC power supply, wherein the rectifier module can convert the AC voltage output by the AC power supply into a corresponding DC voltage, so that when the third switch 3 is closed, the electrical equipment can be powered and work normally, thereby improving the reliability of the solution.

[0065] As an optional embodiment, it also includes:

[0066] A first anti-reverse module, wherein the first anti-reverse module, the first switch 1 and the first primary winding of the multi-channel transformer 5 are connected in series at both ends of the photovoltaic power source;

[0067] A second anti-reverse module, the second anti-reverse module, the second switch 2, and the second primary winding of the multi-channel transformer 5 are connected in series at both ends of the battery;

[0068] The third anti-reverse module is connected to the first end of the secondary winding of the multi-channel transformer 5 .

[0069] In the utility model, the power supply integrated circuit is also provided with a first anti-reverse module, a second anti-reverse module, and a third anti-reverse module. The first anti-reverse module is arranged in the first primary circuit of the multi-channel transformer 5 to prevent the current from flowing back into the photovoltaic power supply. Similarly, the second anti-reverse module prevents the current from flowing back into the battery, and the third anti-reverse module ensures that the current can be accurately transmitted to the electrical equipment.

[0070] As an optional embodiment, the first anti-reverse module is a first diode, and the first diode, the first switch 1 and the first primary winding of the multi-channel transformer 5 are connected in series at both ends of the photovoltaic power source;

[0071] The second anti-reverse module is a second diode, and the second diode, the second switch 2, and the second primary winding of the multi-channel transformer 5 are connected in series at both ends of the battery;

[0072] The third anti-reverse module is a third diode, and the third diode is connected to the first end of the secondary winding of the multi-channel transformer 5 .

[0073] In the utility model, the specific structures of the first anti-reverse module, the second anti-reverse module and the third anti-reverse module are all diodes, which have the advantages of low driving voltage, small working current, strong anti-vibration and impact ability, small size, high reliability, low power consumption and long life.

[0074] As an optional embodiment, it also includes:

[0075] A first current limiting module, the first current limiting module, the first switch 1 and the first primary winding of the multi-channel transformer 5 are connected in series at both ends of the photovoltaic power source;

[0076] A second current limiting module, the second current limiting module, the second switch 2, and the second primary winding of the multi-channel transformer 5 are connected in series at both ends of the battery;

[0077] The third current limiting module, the third current limiting module, the third switch 3 and the third primary winding of the multi-channel transformer 5 are connected in series at both ends of the AC power supply module.

[0078] In the utility model, a first current limiting module, a second current limiting module and a third current limiting module are also provided in the power supply integrated circuit. The first current limiting module, the second current limiting module and the third current limiting module are respectively provided in the first primary circuit, the second primary circuit and the third primary circuit of the multi-channel transformer 5, so as to play a role of current limiting and improve the safety of the scheme.

[0079] As an optional embodiment, the first current limiting module is a first resistor, and the first resistor, the first switch 1 and the first primary winding of the multi-channel transformer 5 are connected in series at both ends of the photovoltaic power source;

[0080] The second current limiting module is a second resistor, and the second resistor, the second switch 2, and the second primary winding of the multi-channel transformer 5 are connected in series at both ends of the battery;

[0081] The third current limiting module is a third resistor. The third resistor, the third switch 3 and the third primary winding of the multi-channel transformer 5 are connected in series at two ends of the AC power supply module.

[0082] In the utility model, the first current limiting module, the second current limiting module and the third current limiting module are all resistors. The advantages of the current limiting solution using a single resistor are small size and low cost.

[0083] As an optional embodiment, it also includes:

[0084] A filter module, wherein a first end of the filter module is respectively connected to a first end of a secondary winding of the multi-channel transformer 5 and an electrical device, and a second end of the filter module is respectively connected to a second end of a secondary winding of the multi-channel transformer 5 and a ground wire.

[0085] In the utility model, a filter module is also provided in the power supply integrated circuit. The filter module is provided between the two ends of the secondary winding and the ground wire, and its function is to filter out interference in the electric energy transmitted from the secondary winding to the electric equipment.

[0086] It should be noted that, in practical applications, the filter module may be a capacitor, an RC filter circuit, an LC filter circuit or other filter modules.

[0087] As an optional embodiment, the filtering module is a capacitor, the first end of the capacitor is respectively connected to the first end of the secondary winding of the multi-channel transformer 5 and the electrical equipment, and the second end is respectively connected to the second end of the secondary winding of the multi-channel transformer 5 and the ground wire.

[0088] In the utility model, the filter module is a capacitor, and the function of the capacitor is to filter out the interference in the electric energy transmitted from the secondary winding to the electric equipment. The capacitor has a small size and low cost.

[0089] The utility model also provides an embodiment corresponding to a power supply integrated system, comprising: a photovoltaic power supply, a battery, an AC power supply module and the power supply integrated circuit as described above, wherein the power supply integrated circuit is respectively connected to the photovoltaic power supply, the battery and the AC power supply module.

[0090] The power supply integration system provided in this embodiment corresponds to the above-mentioned circuit, and thus has the same beneficial effects as the above-mentioned circuit. Therefore, for the embodiments of the power supply integration system part, please refer to the description of the embodiments of the circuit part, which will not be repeated here.

[0091] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0092] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply integrated circuit, characterized in that: include: A first switch, a second switch, a third switch, a controller, and a multi-channel transformer; The first switch and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source; The second switch and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery; The third switch and the third primary winding of the multi-channel transformer are connected in series at both ends of the AC power supply module; The controller is respectively connected to the control end of the first switch, the control end of the second switch and the control end of the third switch; The multi-channel transformer, the two ends of the secondary winding of the multi-channel transformer are connected to the electrical equipment.

2. The power supply integrated circuit according to claim 1, characterized in that: Also includes: A voltage acquisition module, wherein the acquisition end of the voltage acquisition module is connected to the first end of the secondary winding of the multi-channel transformer, and the output end is connected to the controller, and is used to acquire the voltage value on the secondary winding.

3. The power supply integrated circuit according to claim 1, characterized in that: The AC power supply module includes a rectifier module and an AC power supply. The input end of the rectifier module is connected in parallel with the AC power supply and is used to convert the AC voltage output by the AC power supply into a corresponding DC voltage.

4. The power supply integrated circuit according to claim 1, characterized in that: Also includes: A first anti-reverse module, wherein the first anti-reverse module, the first switch and the first primary winding of the multi-channel transformer are connected in series at two ends of the photovoltaic power source; A second reverse anti-reverse module, wherein the second reverse anti-reverse module, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery; A third anti-reverse module is connected to the first end of the secondary winding of the multi-channel transformer.

5. The power supply integrated circuit according to claim 4, characterized in that: The first anti-reverse module is a first diode, and the first diode, the first switch and the first primary winding of the multi-channel transformer are connected in series at both ends of the photovoltaic power source; The second anti-reverse module is a second diode, and the second diode, the second switch, and the second primary winding of the multi-channel transformer are connected in series at both ends of the battery; The third anti-reverse module is a third diode, and the third diode is connected to the first end of the secondary winding of the multi-channel transformer.

6. The power supply integrated circuit according to claim 1, characterized in that: Also includes: A first current limiting module, wherein the first current limiting module, the first switch and the first primary winding of the multi-channel transformer are connected in series at two ends of the photovoltaic power source; A second current limiting module, wherein the second current limiting module, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery; A third current limiting module, the third current limiting module, the third switch and the third primary winding of the multi-channel transformer are connected in series at both ends of the AC power supply module.

7. The power supply integrated circuit according to claim 6, characterized in that: The first current limiting module is a first resistor, and the first resistor, the first switch and the first primary winding of the multi-channel transformer are connected in series at two ends of the photovoltaic power source; The second current limiting module is a second resistor, and the second resistor, the second switch, and the second primary winding of the multi-channel transformer are connected in series at two ends of the battery; The third current limiting module is a third resistor. The third resistor, the third switch and the third primary winding of the multi-channel transformer are connected in series at two ends of the AC power supply module.

8. The power supply integrated circuit according to any one of claims 1 to 7, characterized in that: Also includes: A filter module, wherein a first end of the filter module is respectively connected to a first end of the secondary winding of the multi-channel transformer and the electrical device, and a second end of the filter module is respectively connected to a second end of the secondary winding of the multi-channel transformer and a ground wire.

9. The power supply integrated circuit according to claim 8, characterized in that: The filtering module is a capacitor, a first end of which is respectively connected to the first end of the secondary winding of the multi-channel transformer and the electrical device, and a second end of which is respectively connected to the second end of the secondary winding of the multi-channel transformer and a ground wire.

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