Online fast-charging APS power supply for 5G micro base station

Abstract

The utility model discloses an on-line fast charging APS power supply for a 5G micro base station, which comprises a filtering device used for being connected with an external power supply and a PFC rectifying device electrically connected with the filtering device, and is characterized in that the PFC rectifying device is electrically connected to an APS power supply device, the APS power supply device is also connected with a storage battery, and the storage battery is electrically connected with the external power supply. The APS power supply device is provided with an output port used for being connected with a load, and the APS power supply device comprises a multi-phase synchronous DC-DC module. According to the technical scheme of the utility model, automatic distribution and sharing of electric power among the power supply modules can be realized, so that the whole micro base station power supply is ensured to work in an optimal state, and the stability and reliability of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, and in particular to an energy-saving 5G online micro base station power supply. Background Art

[0002] At present, most 5G micro base station groups at home and abroad use UPS uninterruptible power supply for power supply. According to the working principle, UPS uninterruptible power supply can be divided into three types: backup type, online type and online interactive type. Online UPS is suitable for fields with strict requirements on power supply such as banking, securities, medical treatment, and communications. Its composition includes filters, rectifiers, chargers, batteries, inverters and other structures.

[0003] For 5G micro base stations, when the online UPS is powered by the grid normally, the voltage input from the grid passes through the filter to remove the high-frequency interference in the grid, obtaining pure AC power, which then enters the rectifier for rectification and filtering, converting the AC power into smooth DC power. After that, it is divided into two paths, one entering the charger to charge the battery, and the other supplying the inverter, which converts the DC power into AC power for the load.

[0004] When the city power is interrupted, the input of AC power is cut off and the rectifier no longer works. At this time, the battery discharges and transmits energy to the inverter, which then converts DC power into AC power for use by the load.

[0005] When an online UPS fails, the load can be directly powered by AC power by manually switching to bypass mode, so that the UPS can be repaired without affecting the operation of the load.

[0006] Online UPS can provide temporary power supply when the power grid is out of power or the voltage fluctuates, protecting key equipment from power outages. However, its working mode is single and lacks a management system. When a 5G micro base station cluster with high power consumption is working, the output voltage noise will increase and the system will be unstable. Utility Model Content

[0007] The purpose of the utility model is to provide a.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A 5G micro base station online fast-charging APS power supply, including a filtering device for connecting to an external power supply, and a PFC rectifier device electrically connected to the filtering device, wherein the PFC rectifier device is electrically connected to an APS (Advanced Power System) power supply device, a battery is also connected to the APS power supply device, and an output port for connecting to a load is provided on the APS power supply device, and the APS power supply device includes a multi-phase synchronous DC-DC module.

[0010] Some preferred technical solutions of the utility model are as follows:

[0011] Preferably, the APS power supply device includes an APS control device and a plurality of the multi-phase synchronous DC-DC modules controlled by the APS control device, the plurality of multi-phase synchronous DC-DC modules respectively output to their respective single-phase detection modules, and then the single-phase detection module outputs a detection signal to the APS control device, the single-phase detection module outputs to a load detection module, the load detection module outputs a detection signal to the APS control device, and the load detection module outputs to an inverter AC output and a DC direct output.

[0012] Preferably, the PFC rectifier device and the battery are connected to the multi-phase synchronous DC-DC module via a relay.

[0013] Preferably, each of the multi-phase synchronous DC-DC modules is controlled separately by the APS control device.

[0014] Preferably, the APS control device is also connected to a temperature sensor, which is used to measure the temperature of the 5G micro base station online fast charging APS power supply.

[0015] Preferably, the load detection module detects current by differential resistance sampling and detects voltage by voltage-dividing resistance sampling.

[0016] Preferably, the PFC rectifier device is a boost type active PFC.

[0017] Preferably, there are three multi-phase synchronous DC-DC modules.

[0018] Preferably, the output voltage range of the multi-phase synchronous DC-DC module is 75V to 85V.

[0019] Preferably, the output voltage of the multi-phase synchronous DC-DC module is 80V.

[0020] To sum up, due to the adoption of the above-mentioned technical scheme, the beneficial effects of the utility model are as follows: after the micro base station power supply inputs AC power, the AC power is filtered, and the power factor is calibrated and then rectified, and the output DC voltage provides uninterrupted power supply to the load through the APS power supply device. Since the APS power supply device has the function of adjusting each multi-phase synchronous DC-DC module, it can realize automatic distribution and sharing of power between power modules, thereby ensuring that the overall micro base station power supply works in the best state, reducing the noise and ripple interference of the power supply, and improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a system block diagram of an embodiment of a 5G micro base station online fast charging APS power supply of the utility model.

[0022] Figure 2 for Figure 1 Schematic diagram of the APS power supply device in the illustrated embodiment.

[0023] Figure 3 for Figure 1 A connection diagram of the modules of the illustrated embodiment. DETAILED DESCRIPTION

[0024] The utility model is described in detail below in conjunction with the accompanying drawings.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Example 1

[0027] This embodiment provides a 5G micro base station online fast charging APS power supply, such as Figures 1 to 3As shown, it includes a filter device for accessing an external power supply, a PFC rectifier device electrically connected to the filter device, wherein the PFC rectifier device is electrically connected to an APS power supply device, a battery is also connected to the APS power supply device, and an output port for connecting to a load is provided on the APS power supply device, and the APS power supply device includes a multi-phase synchronous DC-DC module. The APS power supply device can be based on the VersaPower architecture of Keysight to ensure that the output voltage (voltage regulator source) or current (current source) is accurate, pure and stable. It can also be assembled by a technician in this field based on the APS control device. The APS control device can be based on the TL494 power control chip to realize the control of a single DCDC module, and cooperate with the LM393 voltage comparator, LM358 operational amplifier, and Ref3318 voltage reference chip to realize automatic monitoring and control. LM358 is used to amplify voltage, current and temperature detection signals; Ref3318 provides reference comparison voltage; LM393 compares the voltage, current and temperature signals amplified by LM358 with the reference comparison voltage provided by Ref3318, and then outputs an enable signal to control TL494.

[0028] Based on the above technical solution, through the calibration function, dynamic energy saving and calibration of APS, it can cooperate with the grid power input and battery power input, and reasonably allocate the number of power supply phases by monitoring the load conditions.

[0029] On the basis of the above technical solution, each component can be optimized and designed according to actual conditions and requirements, as follows.

[0030] In the above embodiment, a single-phase three-stage power filter can be used. By utilizing its good common-mode and differential-mode suppression characteristics, it can help the 5G micro base station online fast-charging APS power supply obtain a good AC input. The AC filter device and the power grid are connected to the PFC module, where the input is the 220V AC voltage of the power grid. After filtering, a relatively pure sinusoidal 220V AC is output to the PFC rectifier part to ensure the overall stable operation of the system. The PFC module is connected between the filter device and the APS power supply device. The input of the PFC module is the AC filter module, and the output is the APS power supply device. The PFC adopts a boost-type active PFC method to convert the input AC power into DC power, while reducing reactive power, improving the power factor, and providing a DC voltage for the subsequent circuit.

[0031] The APS power supply device in the above embodiment includes a multi-phase synchronous DC-DC module and an APS control device.

[0032] In a multi-phase synchronous DC-DC module, multiple multi-phase synchronous DC-DC modules are connected in parallel and are uniformly controlled by one control module. Figure 2 The detection module shown in the figure checks the output voltage value of each module and outputs the output voltage to the APS control device, so that the APS control device can control each module to maintain a constant voltage and complete the parallel constant voltage output. Through the parallel topology, each unit sub-multiphase synchronous DC-DC module can distribute the power consumed by the load, avoiding the large heat generation, low efficiency, and large voltage ripple caused by the large current of the single topology. The input of this module is the output voltage of the PFC module and the battery. The PFC rectifier converts it into a DC voltage and boosts it. The output to the subsequent connected output module is a single-phase detection submodule. Multiple multi-phase synchronous DC-DC submodules are input by a PFC rectifier device, and multiple boosted DC voltages are output. They are connected in parallel to power the subsequent modules, thereby dispersing the current, reducing heat, and increasing power. At the same time, it provides a hardware basis for the APS control module to adjust the number of power supply phases. The battery and PFC module can switch the input source through a relay to achieve an uninterrupted effect. Among them, the battery is connected to the APS power supply device, and the input and output of the battery are both APS power supply devices. When the system is powered by the power grid, the battery device is used as an input device and charged by the APS power supply device. When the power grid is insufficient or missing, the battery is used as an output device to power the APS power supply device to ensure that its load can still work normally when the power grid is unstable. The multi-phase synchronous DC-DC module boosts the input voltage to about 80V (or a voltage between 75V and 85V) to directly power its load, or outputs AC power through an inverter. Multiple synchronous DC-DC modules can be controlled separately, which increases the flexibility of power conversion. With the control device, the number of power supply phases required by the load can be accurately controlled, while also dispersing the power, reducing the danger of the power supply and increasing the convenience of maintenance. After passing through the single-phase detection module, they are respectively input to the load detection module, and then after passing through the load detection module to the output, and are output to direct DC output and inverter AC output respectively. Among them, the inverter AC output converts DC power into AC power for use in various situations. If the input source is lost and the system is powered by a battery, the module can still output an AC power, completing the system's uninterrupted power supply feature.

[0033] The load detection module can detect the current, voltage, power and other information required by the load, and feed it back to the APS control module. The current detection method is differential resistance sampling, the voltage detection is voltage divider resistance sampling, and the power detection is obtained by calculating the voltage and current. A thermocouple is also connected to the APS control module as a corresponding temperature sensor for detection.

[0034] The APS control device detects the output voltage, output current, output power, module temperature and other parameters of each unit DC-DC module and load, and then sends an electrical signal to each unit DC-DC module to enable or disable it.

[0035] The APS control device can monitor the working status of each unit sub-DC-DC module. Once a sub-DC-DC module fails or is overloaded, it will trigger the LM393 comparison circuit to automatically transfer the load from the output to the backup bypass input to ensure that the continuous power supply is not affected. When the system requires a large current, it can reasonably distribute the current to multiple sub-modules to reduce system heating and loss. When the system needs maintenance, repair or overhaul, the APS control device can use the automatic bypass switching function to switch the load to the backup power supply, so that maintenance work can be carried out without interrupting the power supply, ensuring the continuous operation of the equipment and system. The APS control device can also monitor the output load conditions, control the required number of sub-DC-DC module phases by monitoring the load power conditions, reasonably distribute power, and increase the stability of the system. Once the load exceeds the tolerable range, it will trigger the LM393 comparison circuit to automatically switch to bypass to avoid overload and cause system paralysis or equipment damage.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 5G micro base station online fast charging APS power supply, comprising a filter device for accessing an external power supply, and a PFC rectifier device electrically connected to the filter device, characterized in that: The PFC rectifier device is electrically connected to an APS power supply device, a battery is also connected to the APS power supply device, and an output port for connecting to a load is provided on the APS power supply device. The APS power supply device includes a multi-phase synchronous DC-DC module.

2. According to claim 1, a 5G micro base station online fast charging APS power supply is characterized in that: The APS power supply device includes an APS control device and a plurality of multi-phase synchronous DC-DC modules controlled by the APS control device. The plurality of multi-phase synchronous DC-DC modules respectively output to respective single-phase detection modules, and then the single-phase detection module outputs a detection signal to the APS control device, the single-phase detection module outputs to a load detection module, the load detection module outputs a detection signal to the APS control device, and the load detection module outputs to an inverter AC output and a DC direct output.

3. According to claim 2, a 5G micro base station online fast charging APS power supply is characterized in that: The PFC rectifier device and the battery are connected to the multi-phase synchronous DC-DC module through relays.

4. According to claim 3, a 5G micro base station online fast charging APS power supply is characterized in that: Each of the multi-phase synchronous DC-DC modules is controlled separately by the APS control device.

5. According to claim 4, a 5G micro base station online fast charging APS power supply is characterized in that: The APS control device is also connected to a temperature sensor, which is used to measure the temperature of the 5G micro base station online fast charging APS power supply.

6. According to claim 5, a 5G micro base station online fast charging APS power supply is characterized in that: The load detection module detects current by differential resistance sampling and detects voltage by voltage-dividing resistance sampling.

7. A 5G micro base station online fast charging APS power supply according to claim 6, characterized in that: The PFC rectifier is a boost type active PFC.

8. A 5G micro base station online fast charging APS power supply according to claim 4, characterized in that: There are three multi-phase synchronous DC-DC modules.

9. A 5G micro base station online fast charging APS power supply according to claim 8, characterized in that: The output voltage range of the multi-phase synchronous DC-DC module is 75V to 85V.

10. A 5G micro base station online fast charging APS power supply according to claim 8, characterized in that: The output voltage of the multi-phase synchronous DC-DC module is 80V.

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