Hybrid power supply system

Abstract

The utility model provides a hybrid power supply system which can be connected with one or more interfaces of a PoE exchange network port, a USB interface, a TypeC interface, a round head connector and a phoenix terminal, electric signals output by different interfaces are processed differently and then are input into a switch array, the switch array switches one path of electric signals into a DC / DC power supply converter within a preset time, and the DC / DC power supply converter switches the other path of electric signals into a DC / DC power supply. And the electric signal is transformed into the voltage required by the load through the DC / DC power converter. The system supports the connection of a plurality of output interfaces, and provides a plurality of power supply modes for users to select, thereby solving the problem that the terminal equipment is unavailable because the power supply voltage, the power supply protocol and the power supply interface are not matched. Moreover, the hybrid power supply system does not need to convert various power supplies into power supplies required by corresponding terminals through an intermediate-stage power converter, such as an inverter and an industrial switch, and then deploy the power supplies together to be used by the terminals, so that the problems that power supply networking is complicated, the integration level is low and no existing intermediate-stage converter needs to be customized are solved; therefore, the cost and the size of the product are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, in particular to a hybrid power supply system. Background Art

[0002] Most existing terminal devices operate based on a single power supply system, such as 48V / 56V PoE (Power over Ethernet) and 12VDC (Direct Current). However, due to the varying power supply specifications and protection requirements in various sectors, such as industrial and consumer devices, the application of these terminal devices in these fields often faces issues such as incompatibility with power supply voltages, protocols, and interfaces, leading to device unavailability. This, in turn, increases networking complexity, reduces integration, and necessitates customization of custom intermediate converters, impacting product cost, size, and integration.

[0003] In the prior art, the patent with authorization announcement number CN206602386U discloses a new type of power supply equipment, please refer to Figure 1 The device controls data transmission via a USB interface with OTG (plug and play) functionality, and then controls a controllable DC / DC (direct current to direct current) converter circuit to change the output charging voltage, thereby achieving controllable charging voltage and enhancing the compatibility of the power supply device with power-consuming devices. However, this patent only applies to USB-related power supply systems, and its functional scope is also limited, and it cannot be applied to all scenarios.

[0004] In order to solve the above problems, the patent with authorization announcement number CN212137693U proposes a power supply circuit, please refer to Figure 2 The circuit includes a voltage regulator module, a voltage adjustment module, a PD power receiving module, a DC / DC converter module, and a load module. This solution aims to achieve both PoE power supply and DC power adapter power supply through a single power port. However, this existing technology reuses the PoE RJ45 connector for its external interface, does not support the separation of power and network port functions, and its functional scope is limited by the capabilities of the PD chip, making it unusable in some scenarios. Utility Model Content

[0005] The purpose of the present invention is to provide a hybrid power supply system that achieves multi-interface compatibility and adapts to power supply requirements in different scenarios.

[0006] The utility model provides a hybrid power supply system, comprising an input interface unit, a power supply protocol matching module, a switch array and a DC / DC power converter;

[0007] The electrical signal output by the first output interface of the input interface unit passes through the power supply protocol matching module and is input into the switch array together with the electrical signal output by the second interface of the input interface unit; the switch array switches one channel of the electrical signal to the DC / DC power converter, and the DC / DC power converter transforms the electrical signal into the voltage required by the load.

[0008] Furthermore, the first output interface of the input interface unit is a PoE switching network port; the second output interface of the input interface unit includes at least one of a USB interface, a Type C interface, a round head connector and a Phoenix terminal.

[0009] Furthermore, a common input protection module is included; the electrical signals output by the first output interface and the second output interface are respectively input into the power supply protocol matching module and the switch array after passing through the common input protection module.

[0010] Furthermore, the common input protection module includes a TVS and an MOV sequentially connected in parallel on the network connection line.

[0011] Furthermore, the power supply protocol matching module includes a full-bridge rectifier circuit and PoE PD+ (Power over Ethernet Plus); the electrical signal output by the PoE switching network port passes through the common input protection module and is input into the full-bridge rectifier circuit for rectification; after the full-bridge rectifier circuit unifies the voltage polarity output by the PoE switching network port, the electrical signal is transmitted to the switch array through the PoE PD+.

[0012] Furthermore, the full-bridge rectifier circuit includes two sets of full-bridge structures and two sets of transformer secondary windings;

[0013] Each full-bridge structure includes four bridge arms, each of which is provided with a MOS tube for controlling the full-bridge rectifier circuit; the input ends of the two full-bridge structures are electrically connected to the secondary windings of the transformers of the two data pairs and the two spare pairs, respectively; the output ends of the two full-bridge structures are connected in parallel and electrically connected to the input end of the PoE PD+.

[0014] Furthermore, an input protection module is included, and the electrical signal transmitted by the second output interface passes through the common input protection module and the input protection module in sequence and is input into the switch array.

[0015] Furthermore, the input protection module includes a Schottky diode; an anode of the Schottky diode is electrically connected to the input interface unit, and a cathode of the Schottky diode is electrically connected to the input end of the switch array.

[0016] Furthermore, the input protection module includes a Schottky diode; an anode of the Schottky diode is electrically connected to the input interface unit, and a cathode of the Schottky diode is electrically connected to the input end of the switch array.

[0017] Furthermore, the switch array includes multiple MOS tubes, the sources of the MOS tubes are connected to the input end of the DC / DC power converter; the gate of the MOS tube is the control end; the source of the MOS tube is respectively connected to the output end of the power supply protocol matching module or the input end of the input protection module.

[0018] Furthermore, the DC / DC power converter includes at least one of a linear regulator, a switching regulator and a modular power supply.

[0019] Compared with the prior art, the present invention has at least the following technical effects:

[0020] In the present invention, the electrical signal output by the first output interface of the input interface unit passes through the power supply protocol matching module and is input into the switch array together with the electrical signals output by the remaining output interfaces of the input interface unit; the switch array switches one electrical signal to the DC / DC power converter within a preset time, and the DC / DC power converter transforms the electrical signal into the voltage required by the load. It can be seen that the system supports the connection of multiple output interfaces and provides a variety of power supply methods for users to choose from, thereby solving the problem that the terminal device is unavailable due to the mismatch of power supply voltage, power supply protocol and power supply interface. In addition, the above-mentioned hybrid power supply system does not need to use intermediate power converters, such as inverters, industrial switches and other equipment to convert various power sources into the power required by the corresponding terminal, and then deploy them together for use by the terminal, avoiding the problems of complex power supply networking, low integration and the need to customize the existing intermediate converters, thereby reducing the cost and volume of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a power supply circuit in the prior art;

[0022] Figure 2 This is a schematic structural diagram of a power supply device in the prior art;

[0023] Figure 3 Schematic diagram of the structure of the hybrid power supply system in this embodiment;

[0024] Figure 4 Schematic diagram of the structure of the hybrid power supply system in this embodiment;

[0025] Figure 5 Schematic diagram of the structure of the hybrid power supply system in this embodiment;

[0026] Figure 6 This is a schematic diagram of the structure of the power supply protocol matching module in this embodiment. DETAILED DESCRIPTION

[0027] The following description of a hybrid power supply system of the present invention is combined with a schematic diagram, which shows a preferred embodiment of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general knowledge for those skilled in the art and not as a limitation of the present invention.

[0028] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0029] Please refer to Figure 3 , this embodiment provides a hybrid power supply system, including an input interface unit, a power supply protocol matching module, a switch array and a DC / DC power converter.

[0030] The electrical signal output by the first output interface of the input interface unit passes through the power supply protocol matching module and is input into the switch array together with the electrical signal output by the second interface of the input interface unit; the switch array switches one channel of the electrical signal to the DC / DC power converter, and the DC / DC power converter transforms the electrical signal into the voltage required by the load.

[0031] In the present invention, the electrical signal output by the first output interface of the input interface unit passes through the power supply protocol matching module and is input into the switch array together with the electrical signals output by the remaining output interfaces of the input interface unit; the switch array switches one electrical signal to the DC / DC power converter within a preset time, and the DC / DC power converter transforms the electrical signal into the voltage required by the load. It can be seen that the system supports the connection of multiple output interfaces and provides a variety of power supply methods for users to choose from, thereby solving the problem that the terminal device is unavailable due to the mismatch of power supply voltage, power supply protocol and power supply interface. In addition, the above-mentioned hybrid power supply system does not need to use intermediate power converters, such as inverters, industrial switches and other equipment to convert various power sources into the power required by the corresponding terminal, and then deploy them together for use by the terminal, avoiding the problems of complex power supply networking, low integration and the need to customize the existing intermediate converters, thereby reducing the cost and volume of the product.

[0032] In this embodiment, the first output interface of the input interface unit is a PoE switching network port; the second output interface of the input interface unit includes at least one of a USB port, a Type-C port, a round connector, and a Phoenix terminal. The USB port and the Type-C port are compatible with each other, and the round connector and the Phoenix terminal are compatible with each other. It is understood that there can be multiple output interfaces or only one, and those skilled in the art can select the number of output interfaces based on actual conditions.

[0033] It can be seen that the above system supports PoE network power supply and other DC power adapter power supply, and can adapt to various scenarios such as indoor and outdoor, full-type PoE, industrial and 2C fields. For example: it is suitable for various 56V / 48V PoE protocols and standard / non-standard full-polarity PoE power supply, 24VDC / 48VDC and other typical industrial power supply systems, and 12VDC and other typical terminal power supply systems.

[0034] Furthermore, in this embodiment, if the system is applied to the industrial field, the power supply voltage and current in the industrial equipment are usually high. Therefore, before the electrical signal is connected to each signal processing module, it needs to be voltage-protected by a common input protection module. Specifically, the common input protection module is connected between the switch array and the power supply protocol matching module and the switch array; the electrical signals output by the first output interface and the second output interface of the input interface unit are respectively input into the power supply protocol matching module and the switch array after passing through the common input protection module.

[0035] Please refer to Figure 4 In this embodiment, the common input protection module includes MOV and TVS; the TVS is a TVS diode. One end of the MOV (metal oxide varistor) and TVS (breakdown diode) is connected in parallel to the network signal line, and the other end is grounded. MOV and TVS are used to absorb differential mode surges to protect the device from being damaged by surges.

[0036] Furthermore, an input protection module is included. The electrical signal transmitted by the second output interface of the input interface unit passes through the common input protection module and the input protection module in sequence and is then input into the switch array.

[0037] Please refer to Figure 5 In a specific embodiment, the input protection module includes a Schottky diode D1. The anode of the Schottky diode D1 is electrically connected to the input interface unit, and the cathode of the Schottky diode D1 is electrically connected to the input terminal of the switch array.

[0038] Specifically, the electrical signals output from interfaces such as the Type-C / USB port, round connector, and Phoenix terminal port pass through a shared input protection element and are then further protected by a Schottky diode D1. In this embodiment, Schottky diode D1 can at least protect electronic circuits from reverse voltage, overvoltage spikes, and rapid voltage changes.

[0039] Furthermore, in this embodiment, the power supply protocol matching module includes a full-bridge rectifier circuit and PoE PD+.

[0040] Specifically, the electrical signal output by the PoE switching network port passes through a common input protection element and is input into the full-bridge rectifier circuit for rectification; after the full-bridge rectifier circuit rectifies the electrical signal, the electrical signal is transmitted to the switch array through the PoE PD+.

[0041] In this embodiment, the full-bridge rectifier circuit is used to convert the voltage polarity of the PoE output, and can rectify both positive and negative polarity input power to a unified polarity for use by the subsequent stage, so that the network port can adapt to various polarity combinations and the subsequent stage always operates within a safe range.

[0042] In a specific embodiment, please refer to Figure 6 , is the specific structure of the full-bridge rectifier circuit.

[0043] Each full-bridge structure includes four bridge arms, each equipped with a MOS transistor for controlling the full-bridge rectifier circuit. Gate control signals TG12, BG12, BG36, and TG36 control the four MOS transistors in the upper portion of the full-bridge rectifier circuit, respectively. TG45, BG45, BG78, and TG78 control the four MOS transistors in the lower portion of the full-bridge rectifier circuit, respectively. The HSGATE and HSSRC pins of the PoE PD+ are used to control an external high-side power switch. The inputs of the two full-bridge structures are electrically connected to the secondary windings of the transformers of the two data pairs and two spare pairs, respectively. The outputs of the two full-bridge structures are connected in parallel and then electrically connected to the input of the PoE PD+ (Powered Ethernet Plus) through the isolated power supply.

[0044] It's understandable that in a PoE system, the data pairs typically refer to the two pairs of wires in an Ethernet cable used to transmit data (usually pairs 1 and 2). In PoE technology, these wires can transmit power in addition to data signals. The spare pairs typically refer to the other wire pairs in addition to the data pairs (usually pairs 3 and 4). In a standard PoE system, these spare pairs are dedicated to transmitting power and not for data transmission. However, in some designs, the spare pairs can also be used for data transmission in the event of a problem with the data pair, providing a redundant path.

[0045] Furthermore, the output of the full-bridge rectifier circuit is connected to the input of the PoE PD+. It is understood that the function of the PoE PD+ is to process the DC power signal after polarity unification, such as performing protocol matching and power management functions, so that it meets the power supply requirements of the load.

[0046] Through the power supply protocol matching module, the hybrid power supply system can simultaneously support standard and non-standard full-polarity PoE power supply, and support various 48V / 56V PoE protocols.

[0047] Furthermore, after the PoE negotiation is completed, the electrical signal is output to the switch array.

[0048] In this embodiment, the switch array includes multiple MOS transistors. It is understood that the number of MOS transistors is the same as the number of interfaces. The sources of the MOS transistors are connected to the input of the DC / DC power converter; the gates of the MOS transistors are grounded; and the sources of the MOS transistors are connected to the output of the power supply protocol matching module and the output of the input protection module, respectively.

[0049] In one specific example, the switch array's control principle is as follows: the switch array switches signal paths by controlling the gate voltage of MOS transistors. When the gate voltage is high, the MOS transistors conduct, allowing the corresponding input signal to enter the DC / DC power converter; when the gate voltage is low, the MOS transistors turn off, preventing the corresponding input signal from entering the DC / DC power converter. By controlling the gate voltages of different MOS transistors, one of multiple electrical signals can be switched to the DC / DC power converter.

[0050] In this embodiment, by adopting PoE PD+ and a wide-input DC-DC power converter, various PoE protocols of 56V / 48V can be supported to adapt to power supply requirements in different scenarios.

[0051] In a specific embodiment, the DC / DC power converter is a linear regulator, a switching regulator, a modular power supply, etc. Those skilled in the art can select a DC / DC power converter according to actual conditions.

[0052] In another specific embodiment, the voltage output by the DC / DC power converter is a 5V4 bus voltage, which can be used by subsequent loads.

[0053] Those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A hybrid power supply system, characterized in that: Includes input interface unit, power supply protocol matching module, switch array and DC / DC power converter; The electrical signal output by the first output interface of the input interface unit passes through the power supply protocol matching module and is input into the switch array together with the electrical signal output by the second output interface of the input interface unit; The switch array switches one path of the electrical signal to a DC / DC power converter, and the DC / DC power converter transforms the electrical signal into a voltage required by a load.

2. The hybrid power supply system according to claim 1, wherein: The first output interface of the input interface unit is a PoE switching network port; the second output interface of the input interface unit includes at least one of a USB interface, a Type C interface, a round head connector and a Phoenix terminal.

3. The hybrid power supply system according to claim 2, wherein: It also includes a common input protection module; the electrical signals output by the first output interface and the second output interface are respectively input into the power supply protocol matching module and the switch array after passing through the common input protection module.

4. The hybrid power supply system according to claim 3, wherein: The common input protection module includes a TVS and an MOV which are sequentially connected in parallel on the network connection line.

5. The hybrid power supply system according to claim 3, wherein: The power supply protocol matching module includes a full-bridge rectifier circuit and PoE PD+; The electrical signal output by the PoE switching network port passes through the common input protection module and is input into the full-bridge rectifier circuit for rectification; after the full-bridge rectifier circuit unifies the voltage polarity output by the PoE switching network port, the electrical signal is transmitted to the switch array through the PoE PD+.

6. The hybrid power supply system according to claim 5, wherein: The full-bridge rectifier circuit includes two sets of full-bridge structures and two sets of transformer secondary windings; Each full-bridge structure includes four bridge arms, each of which is provided with a MOS tube for controlling the full-bridge rectifier circuit; the input ends of the two full-bridge structures are electrically connected to the secondary windings of the transformers of the two data pairs and the two spare pairs, respectively; the output ends of the two full-bridge structures are connected in parallel and electrically connected to the input end of the PoE PD+.

7. The hybrid power supply system according to claim 3, wherein: It also includes an input protection module. The electrical signal transmitted by the second output interface of the input interface unit passes through the common input protection module and the input protection module in sequence and is then input into the switch array.

8. The hybrid power supply system according to claim 7, wherein: The input protection module includes a Schottky diode; an anode of the Schottky diode is electrically connected to the input interface unit, and a cathode of the Schottky diode is electrically connected to the input end of the switch array.

9. The hybrid power supply system according to claim 5 or 7, characterized in that: The switch array includes multiple MOS transistors, the sources of the MOS transistors are connected to the input end of the DC / DC power converter; the gate of the MOS transistor is the control end; the source of the MOS transistor is respectively connected to the output end of the power supply protocol matching module or the input end of the input protection module.

10. The hybrid power supply system according to claim 1, wherein: The DC / DC power converter includes at least one of a linear regulator, a switching regulator and a modular power supply.

Images