CN204497835U - A PoE switch with uninterrupted power supply - Google Patents

Abstract

The utility model relates to a PoE switch of uninterrupted power supply, especially PoE switch uninterrupted power source controller. The utility model relates to a PoE switch of uninterrupted power supply, including PoE switch main power source module, PoE system module, its characterized in that: and a PoE switch uninterrupted power supply controller module is arranged between the PoE switch main power supply module and the PoE system module. After the structure is adopted, the utility model fully utilizes the advantages of the high-power supply of the PoE system, and does not need an independent charging power supply; the residual power of a power supply built in the PoE system automatically adjusts the charging power, so that the power supply is prevented from being overloaded; the PoE system can know the residual power of the UPS controller of the PoE switch through the communication interface, so that the power supply scheme of the terminal equipment is optimized.

Description

A PoE switch with uninterrupted power supply

technical field

The utility model relates to a PoE switch for uninterrupted power supply, in particular to an uninterruptible power supply controller for the PoE switch.

Background technique

In order to solve the problem of providing stable and uninterrupted power supply to PoE switches, single computers, computer network systems or other power electronic equipment such as solenoid valves and pressure transmitters, the existing technology is to add a UPS to the above equipment without interruption. power supply. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC mains voltage stabilizer, and it also charges the battery inside the machine; when the mains is interrupted (accident blackout) At this time, the UPS will continue to supply 220V AC power to the load through the method of zero-switching conversion of the DC power of the battery immediately, so as to maintain the normal operation of the load and protect the software and hardware of the load from damage. At present, there are two types of UPS uninterruptible power supplies for communication systems on the market: 1. It is designed for the mains voltage, and the output voltage is AC 220V; 2. It is specially designed for traditional communication systems, and the output voltage is negative voltage (negative 48V).

The main disadvantage of UPS power supply with mains output voltage is the increased power loss of the power supply. The power inverter first converts the low voltage of the battery into AC 220V mains power. During this conversion process, there will be about 15% power loss; then input it to the power supply in the PoE system, and then convert the voltage When the voltage is reduced to the voltage required by the PoE system, there will be a power loss of about 15% in this process. Therefore, at least 32.25% of the power is lost during the two voltage conversions.

The UPS uninterruptible power supply for traditional communication systems also has the following disadvantages:

A. The output voltage range cannot meet the voltage requirements of PoE standards. In the IEEE802.3AT standard, the required minimum voltage is above 50V, while the traditional communication power supply voltage is generally 48V.

B. Large size. The UPS uninterruptible power supply of the communication system is designed for large-scale communication system computer rooms. This kind of UPS uninterruptible power supply cannot meet the needs of some small and simple deployment of PoE switches.

C. The cost is high, and it is not suitable for mass users.

Utility model content

In order to overcome the above-mentioned technical defects, the technical problem to be solved by this utility model is to provide a small uninterruptible power supply controller for PoE switches, which has the advantages of low loss, meeting IEEE802.3AT standard voltage, small size and low cost.

In order to solve the above technical problems, the utility model provides a PoE switch with uninterrupted power supply, which includes a PoE switch main power module and a PoE system module, and is characterized in that a PoE switch is provided between the PoE switch main power module and the PoE system module. Switch uninterruptible power supply controller module.

The PoE switch for uninterruptible power supply is characterized in that: the uninterruptible power supply controller module of the PoE switch includes

Auxiliary power supply module: provide 3.3V power supply for MCU microcontroller module and communication interface circuit module;

MCU microcontroller module: used to monitor in real time whether the main power module of the PoE switch is supplying power normally, detect whether the voltage of the battery pack module needs to be charged and discharged, and control the work of each module;

Communication interface circuit module: the MCU microcontroller module communicates with the PoE system module through the communication interface circuit module.

DC/DC step-down circuit module: used to charge the battery pack module;

Charging circuit module: used to charge the battery pack module;

DC/DC boost circuit module: Boost the voltage of the battery pack module to the voltage required by the PoE switch;

Battery pack module: store power;

One-two switch: to choose whether to use the mains or the power supply in the battery pack module to supply power to the PoE system module;

The auxiliary power supply module, MCU microcontroller module, and communication interface circuit module are connected to the PoE system module in turn;

The main power supply module of the PoE switch, the DC/DC step-down circuit module, the charging circuit module, and the DC/DC step-up circuit module are connected in sequence, and are connected to the PoE system module through a two-choice switch;

The MCU microcontroller module is connected to the PoE system module through a two-select-one switch;

The MCUT micro-controller module is respectively connected with the DC/DC step-down circuit module, the charging circuit module and the DC/DC boosting circuit module, and a battery pack module is arranged between the charging circuit module and the DC/DC boosting circuit.

The PoE switch with uninterrupted power supply is characterized in that: the DC/DC step-up circuit module can boost the voltage of the storage battery module to a voltage between 50V-57V for use by the PoE system.

The PoE switch for uninterrupted power supply is characterized in that: the battery pack module can be a lead-acid battery, a high-energy nickel-cadmium battery, a nickel-metal hydride battery, a nickel-zinc battery, a lead cloth battery, a lithium-ion battery, lithium polymer battery.

After adopting such a structure, the utility model makes full use of the advantages of the high-power power supply of the PoE system, and does not need an independent charging power supply; the residual power of the built-in power supply of the PoE system automatically adjusts the charging power to avoid overloading of the power supply; the PoE system The remaining power of the uninterruptible power supply controller of the PoE switch can be known through the communication interface, so as to optimize the power supply scheme for the terminal equipment; the utility model is connected in series between the main power supply and the PoE system, which reduces some conversion links of the power supply and improves the Efficiency, energy saving and environmental protection.

Description of drawings

Figure 1: A system block diagram of a PoE switch with uninterrupted power supply of the utility model;

Fig. 2: A working flow chart of a POE switch with uninterrupted power supply of the utility model.

Detailed ways

Now with reference to Fig. 1 and Fig. 2, it will be described in detail.

Embodiment 1: As shown in Figure 1, the PoE switch uninterruptible power supply controller module is connected in series between the main power supply of the PoE system and the PoE system module. This module can be selected according to the needs of customers. The auxiliary power supply module, MCU microcontroller module, and communication interface circuit module are connected to the PoE system module in sequence; the main power supply module of the PoE switch, the DC/DC step-down circuit module, the charging circuit module, and the DC/DC boost circuit module are connected in sequence, and Connect to the PoE system module through a two-select one switch; MCU microcontroller is connected to the PoE system module through a two-select one switch; the MCU microcontroller module is connected to the DC/DC step-down circuit module, charging circuit module, DC/DC The boost circuit modules are connected; a storage battery pack module is arranged between the charging circuit module and the DC/DC boost circuit. Connecting the battery pack in this way does not require an independent charging power source, which reduces some conversion links of the power source, improves efficiency, and is energy-saving and environmentally friendly.

Implementation mode two

Fig. 2 has shown the work flowchart of the present utility model, at first the voltage of auxiliary power module output 3.3V is used for MCU microcontroller module and communication interface circuit module, and its input power comes from PoE switchboard main power module (if there is power supply , priority) or battery pack module (when the main power module of the PoE switch is out of power).

The MUC microcontroller is used to monitor in real time whether the main power module of the PoE switch is supplying power normally. If there is no normal power supply, the MUC microcontroller module first detects the power of the battery pack module. At the same time, the MUC microcontroller module communicates with the PoE system module to calculate the external The power required by the source equipment, if it is detected that the power of the battery pack module is sufficient for the normal operation of each external source device, then the MUC microcontroller controls the DC/DC boost circuit module to work, so that the DC/DC boost circuit module takes the power of the battery pack The voltage boosted to a voltage between 50-57V is provided to the PoE system module, and the PoE system module is switched to an uninterruptible power supply mode. When the MUC microcontroller detects that the power of the battery has dropped to a certain value and the main power module of the PoE system fails to supply power normally, the MCU microcontroller will stop supplying power to the low-priority external device according to the priority level of the external source device. Make the external device with higher priority work.

Implementation Mode Three

If it is found that the main power supply can supply power normally, the MUC microcontroller module first detects whether the battery module needs to be charged. If it needs to be charged, then the MUC microcontroller communicates with the PoE system module to calculate the power required by the external source. If the main power module still has remaining power, adjust the size of the charging current according to the remaining power of the main power module of the PoE system, control the DC/DC step-down circuit module and the charging circuit module to work, and charge the battery pack; If the capacity is full and there is no excess electric power to charge the battery pack, then the battery pack will not be charged temporarily until the MUC detects that there is excess electric power to charge the battery pack. If the battery pack module does not need to be charged, the main power module of the PoE switch only needs to supply power to external devices.

In the MUC microcontroller, there are two values for the charge and discharge of the battery pack module, which are the maximum value of the battery pack module and the minimum value of the battery pack module. When the battery pack module is charging, the MUC microcontroller detects that the power of the battery pack is greater than or equal to the maximum value, it will stop charging; when the battery pack module is charging, the MUC microcontroller will stop discharging when it detects that the power of the battery pack is less than or equal to the minimum value. During the charging and discharging process, the MUC microcontroller constantly monitors the charging and discharging of the battery pack, so that the battery pack is not overcharged and discharged, and the service life of the battery pack is extended.

The preferred specific embodiments and examples of the utility model have been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation methods and examples, within the scope of knowledge of those skilled in the art, it can also be Various changes are made under the premise of breaking away from the utility model design.

Claims (4)

1. A PoE switch for uninterrupted power supply, comprising a PoE switch main power module and a PoE system module, characterized in that: a PoE switch uninterruptible power supply controller module is provided between the PoE switch main power module and the PoE system module . 2. A kind of uninterruptible power supply PoE switch according to claim 1, is characterized in that: described PoE switch uninterruptible power supply controller module comprises Auxiliary power supply module: provide 3.3V power supply for MCU microcontroller module and communication interface circuit module; MCU microcontroller module: used to monitor in real time whether the main power supply of the PoE switch is in normal power supply, detect whether the voltage of the battery pack module needs to be charged and discharged, and control the work of each module; Communication interface circuit module: the MCU microcontroller module communicates with the PoE system module through the communication interface circuit module; DC/DC step-down circuit module: used to charge the battery pack module; Charging circuit module: used to charge the battery pack module; DC/DC boost circuit module: Boost the voltage of the battery pack module to the voltage required by the PoE system module; Battery pack module: store power; One-two switch: to choose whether to use the mains or the power supply in the battery pack module to supply power to the PoE system module; The auxiliary power supply module, MCU microcontroller module, and communication interface circuit module are connected to the PoE system module in sequence; The main power supply module of the PoE switch, the DC/DC step-down circuit module, the charging circuit module, and the DC/DC boost circuit module are connected in sequence, and are connected to the PoE switch through a two-choice switch; The MCU microcontroller module is connected to the PoE switch through a two-choice switch; The MCU microcontroller module is respectively connected with the DC/DC step-down circuit module, the charging circuit module, and the DC/DC boost circuit module A battery pack module is arranged between the charging circuit module and the DC/DC step-up circuit. 3. A PoE switch with uninterrupted power supply according to claim 2, characterized in that: the DC/DC boost circuit module can boost the voltage of the battery pack module to a voltage between 50V-57V to provide PoE system module used. 4. A PoE switch with uninterrupted power supply according to claim 2, characterized in that: the battery pack can be lead-acid battery, high-energy nickel-cadmium battery, nickel metal hydride battery, nickel-zinc battery, lead cloth battery , lithium-ion battery, lithium polymer battery.