WO2021043300A1 - Procédé de réglage de fréquence de fonctionnement pour une alimentation électrique commutée, et dispositif - Google Patents

Procédé de réglage de fréquence de fonctionnement pour une alimentation électrique commutée, et dispositif Download PDF

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Publication number
WO2021043300A1
WO2021043300A1 PCT/CN2020/113719 CN2020113719W WO2021043300A1 WO 2021043300 A1 WO2021043300 A1 WO 2021043300A1 CN 2020113719 W CN2020113719 W CN 2020113719W WO 2021043300 A1 WO2021043300 A1 WO 2021043300A1
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WO
WIPO (PCT)
Prior art keywords
power supply
switching power
frequency
switching
management unit
Prior art date
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PCT/CN2020/113719
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English (en)
Chinese (zh)
Inventor
谭建
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中兴通讯股份有限公司
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Publication of WO2021043300A1 publication Critical patent/WO2021043300A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Definitions

  • the invention relates to the field of power supply for communication equipment, and in particular to a method and device for adjusting the operating frequency of a switching power supply.
  • the open-loop mode bus module is used to reduce the bus voltage inside the board and improve the efficiency of each voltage conversion circuit inside the board; reduce the LDO of the linear voltage regulator on the board.
  • the embodiment of the present invention provides a method and device for adjusting the operating frequency of a switching power supply, so as to at least solve the problem of how to ensure that the switching power supply circuit operates at the optimal efficiency point in the case of load changes in the related art.
  • a method for adjusting the operating frequency of a switching power supply including: a management unit obtains current load information of the switching power supply in a circuit; and the management unit queries the pre-stored information according to the current load information. The corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions; the management unit adjusts the operating frequency of the switching power supply according to the query result.
  • obtaining the load information of the switching power supply in the circuit by the management unit includes: the management unit obtains the load information of the switching power supply by reading the current and/or voltage value of the switching power supply.
  • the management unit before the management unit queries the pre-stored correspondence table of the switching frequency and efficiency of the switching power supply under different load conditions, it further includes: comparing the correspondence between the switching frequency and efficiency of the switching power supply under different load conditions The table is stored in the storage unit.
  • the management unit inquiring a pre-stored correspondence table of the switching frequency and efficiency of the switching power supply under different load conditions includes: the management unit inquiring the correspondence table to determine that under the current load condition of the switching power supply, The switching frequency of the switching power supply has the highest power efficiency.
  • the management unit adjusting the operating frequency of the switching power supply according to the query result includes: the management unit adjusting the operating frequency of the switching power supply to the inquired switching frequency.
  • the management unit adjusts the operating frequency of the switching power supply through at least one of the following: adjusting the operating frequency of the switching power supply by adjusting the operating frequency setting pin RT of the switching power supply chip; adjusting the operating frequency of the switching power supply through the I2C frequency modulation command Describe the operating frequency of the switching power supply.
  • adjusting the operating frequency of the switching power supply by adjusting the operating frequency of the switching power supply chip to set the parameters of the pin RT includes one of the following: adjusting the switching power supply by adjusting the resistance value or the grounding capacitance value of the pin RT grounded Working frequency.
  • the management unit when acquiring the current load information of the switching power supply in the circuit, the management unit also acquires the temperature information of the switching power supply.
  • the method further includes: monitoring the operating state of the switching power supply by monitoring the voltage, current, and temperature values of the switching power supply.
  • a device for adjusting the operating frequency of a switching power supply is located in a switching power supply circuit and includes: an acquisition module configured to acquire current load information of the switching power supply in the switching power supply circuit; and query The module is configured to query a pre-stored corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions according to the current load information; the adjustment module is configured to adjust the operating frequency of the switching power supply according to the query result.
  • the acquiring module is further configured to acquire the load information of the switching power supply by reading the current and/or voltage value of the switching power supply.
  • the device may further include: a storage module configured to store a corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions.
  • the query module is further configured to query the correspondence table to determine the switching frequency of the switching power supply with the highest power efficiency under the current load condition of the switching power supply.
  • the adjustment adjusts the operating frequency of the switching power supply by at least one of the following: adjusting the operating frequency of the switching power supply by adjusting the parameters of the operating frequency setting pin RT of the switching power supply chip; adjusting the operating frequency of the switching power supply through an I2C frequency modulation command The operating frequency of the switching power supply.
  • the referred device may further include: a monitoring module configured to monitor the operating state of the switching power supply by monitoring the voltage, current, and temperature values of the switching power supply.
  • a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in the above method embodiment when running.
  • an electronic device including a memory and a processor, the memory is stored with a computer program, and the processor is configured to run the computer program to execute the foregoing method embodiments Steps in.
  • the efficiency and frequency correspondence tables of the switching power supplies of all levels of the system under different loads are stored in advance.
  • the efficiency and frequency correspondence tables are used to change the switches at all levels according to the system load.
  • the operating frequency of the power circuit reduces the switching loss in the circuit and achieves the purpose of improving efficiency.
  • Fig. 1 is a flowchart of a method for adjusting the operating frequency of a switching power supply according to an embodiment of the present invention
  • Fig. 2 is a schematic diagram of frequency adjustment of a single power supply according to an embodiment of the present invention
  • Fig. 3 is a schematic diagram of frequency adjustment of multiple power supplies in parallel according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of frequency logic of a single-board bus power module according to an embodiment of the present invention
  • Fig. 5 is a schematic diagram of a frequency adjustment logic of a POL power supply according to an alternative embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a switching power supply operating frequency adjusting device according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural diagram of a switching power supply operating frequency adjusting device according to an alternative embodiment of the present invention.
  • FIG. 1 is a flowchart of the method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 the management unit obtains current load information of the switching power supply in the circuit
  • Step S104 The management unit queries the pre-stored corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions according to the current load information;
  • Step S106 The management unit adjusts the operating frequency of the switching power supply according to the query result.
  • step S102 of this embodiment the management unit obtains the load information of the switching power supply by reading the current and/or voltage value of the switching power supply.
  • the method may further include: storing the corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions in a storage unit.
  • step S104 of this embodiment the management unit queries the correspondence table to determine the switching frequency of the switching power supply with the highest power efficiency under the current load condition of the switching power supply.
  • step S106 of this embodiment the management unit adjusts the operating frequency of the switching power supply to the inquired switching frequency.
  • the management unit adjusts the operating frequency of the switching power supply through at least one of the following: adjusting the operating frequency of the switching power supply by adjusting the operating frequency setting pin RT of the switching power supply chip; adjusting the operating frequency of the switching power supply through I2C frequency modulation Instructions to adjust the operating frequency of the switching power supply.
  • the operating frequency of the switching power supply can be adjusted by adjusting the resistance value or the grounding capacitance value of the pin RT grounded.
  • the management unit when acquiring the current load information of the switching power supply in the circuit, may also acquire the temperature information of the switching power supply.
  • the method may further include: monitoring the operating state of the switching power supply by monitoring the voltage, current, and temperature of the switching power supply.
  • FIG. 2 shows a schematic diagram of frequency adjustment logic of a single power supply according to an embodiment of the present invention
  • FIG. 3 shows a schematic diagram of frequency adjustment logic of multiple parallel power supplies according to an embodiment of the present invention.
  • the entire communication system supplies power to each single board load of the system through a primary power supply module (for example, AC/DC (DC/DC) or high-voltage direct current module, etc.).
  • a primary power supply module for example, AC/DC (DC/DC) or high-voltage direct current module, etc.
  • the entire communication system supplies power to each single board load of the system by connecting multiple primary power modules in parallel.
  • the primary power supply modules used alone or in parallel for supplying power to the system all have an adjustable switching frequency.
  • the primary power module can work at different switching frequencies under different loads and working environment temperatures.
  • the power conversion efficiency of the primary power module at each frequency is different, corresponding to different loads, there is an optimal operating frequency point.
  • the storage unit of the system management unit (system management single board) stores a load-efficiency-frequency comparison table, which records the correspondence between the efficiency of the power module and the switching frequency under each load.
  • the system management unit reads the real-time power value (including current, voltage and load information) of each primary power supply module, and then obtains the operating temperature of each primary power supply through the temperature sampling circuit, and queries according to the current load of each primary power supply module Load-efficiency-frequency comparison table to obtain the optimal switching frequency, and issue frequency adjustment instructions to each primary power supply module.
  • the system management unit can ensure the power supply by reading the internal temperature and output voltage of each primary power supply. The working condition is stable.
  • Fig. 4 shows a schematic diagram of frequency logic of a single-board bus power supply module according to an embodiment of the present invention.
  • the system management unit reads the operating environment temperature of the board, the bus voltage of the board, and the output current of the module. Based on this information, query the saved load frequency correspondence table, which records the optimal frequency of the power supply under various load conditions, so as to set the power supply circuit to the optimal operating frequency and improve the operating efficiency of the power supply module.
  • FIG. 5 shows a logic schematic diagram of frequency adjustment of a POL power supply according to an embodiment of the present invention.
  • the non-isolated power supply inside the single board, the output load of the voltage conversion chip, the input voltage, the output voltage, and the frequency relationship curve are stored in the system management unit.
  • the frequency can be changed by changing the chip operating frequency setting pin RT (generally non-isolated power control chips are designed with this pin or pins with similar functions).
  • Frequency modulation can be achieved by adjusting the resistance value of RT grounding resistor R.
  • Some chips can achieve frequency modulation by adjusting the capacitance value of RT grounding capacitor C.
  • the RC charging circuit realizes the slow change of the RT resistance value or the frequency setting capacitance value to ensure that the circuit loop is not subject to sudden changes and remains stable.
  • the power chip with PMBUS bus interface can use I2C frequency modulation commands, and the system management board can directly transmit commands through the SDA and SCK signal lines according to the actual power consumption of the system.
  • the management units at all levels of the communication equipment system use the storage unit to store the corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions.
  • the system can read the operating temperature, operating voltage, load current and other information of the device through software or hardware, compare the stored information of the optimal efficiency point of the power supply, and adjust the operating frequency of the switching power supply circuit in real time. Make each circuit work at the optimal operating point, while the system monitors the voltage, current and temperature of each power supply to meet the threshold requirements of the system and ensure the stability of the system.
  • the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) execute the method described in each embodiment of the present invention.
  • a terminal device which can be a mobile phone, a computer, a server, or a network device, etc.
  • a device for adjusting the operating frequency of a switching power supply is also provided.
  • the device is used to implement the above-mentioned embodiments and preferred implementations, and what has been described will not be repeated.
  • the term "module” or "unit” can be a combination of software and/or hardware that implements a predetermined function.
  • the devices described in the following embodiments are preferably implemented by software, implementation by hardware or a combination of software and hardware is also possible and conceived.
  • FIG. 6 is a structural block diagram of a device for adjusting the operating frequency of a switching power supply according to an embodiment of the present invention. As shown in FIG. 6, the device is located in a switching power supply circuit. The device includes an acquisition module 10, an inquiry module 20, and an adjustment module 30.
  • the acquiring module 10 is configured to acquire the current load information of the switching power supply in the switching power supply circuit.
  • the query module 20 is configured to query a pre-stored corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions according to the current load information.
  • the adjustment module 30 is configured to adjust the operating frequency of the switching power supply according to the query result.
  • FIG. 7 is a structural block diagram of a device for adjusting the operating frequency of a switching power supply according to an embodiment of the present invention. As shown in FIG. 7, the device includes the acquisition module 10, the query module 20, and the adjustment module 30 shown in FIG. Storage module 40 and monitoring module 50.
  • the storage module 40 is configured to store a corresponding table of the switching frequency and efficiency of the switching power supply under different load conditions.
  • the monitoring module 50 is configured to monitor the operating state of the switching power supply by monitoring the voltage, current, and temperature of the switching power supply.
  • the acquiring module 10 is further configured to acquire the load information of the switching power supply by reading the current and/or voltage value of the switching power supply.
  • the query module 20 is further configured to query a pre-stored correspondence table of switching frequency and efficiency, and determine the switching frequency of the switching power supply with the highest power efficiency under the current load condition of the switching power supply.
  • the operating frequency of the switching power supply can be adjusted by at least one of the following: adjusting the operating frequency of the switching power supply chip by adjusting the operating frequency setting pin RT of the switching power supply chip; adjusting the operating frequency of the switching power supply by the I2C frequency modulation command The operating frequency of the switching power supply.
  • each of the above modules can be implemented by software or hardware.
  • it can be implemented in the following manner, but not limited to this: the above modules are all located in the same processor; or, the above modules can be combined in any combination.
  • the forms are located in different processors.
  • the embodiment of the present invention also provides a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any one of the foregoing method embodiments when running.
  • the foregoing storage medium may include, but is not limited to: U disk, Read-Only Memory (Read-Only Memory, ROM for short), Random Access Memory (Random Access Memory, RAM for short), Various media that can store computer programs, such as mobile hard disks, magnetic disks, or optical disks.
  • An embodiment of the present invention also provides an electronic device, including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in the foregoing method embodiment.
  • the aforementioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the aforementioned processor, and the input-output device is connected to the aforementioned processor.
  • modules or steps of the present invention can be implemented by a general computing device, and they can be concentrated on a single computing device or distributed in a network composed of multiple computing devices.
  • they can be implemented with program codes executable by the computing device, so that they can be stored in the storage device for execution by the computing device, and in some cases, can be executed in a different order than here.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Procédé de réglage d'une fréquence de fonctionnement d'une alimentation électrique commutée pour améliorer l'efficacité globale de l'alimentation électrique d'un système de communication. Le procédé comprend : une unité de gestion acquérant des informations de charge actuelle d'une alimentation électrique commutée dans un circuit ; l'unité de gestion interrogeant, en fonction des informations de charge actuelle, une table de relations de correspondances pré-stockée de fréquences de commutation et d'efficacité de l'alimentation électrique commutée dans différentes conditions de charge ; et l'unité de gestion réglant une fréquence de fonctionnement de l'alimentation électrique commutée en fonction d'un résultat d'interrogation. L'invention pré-stocke une table de correspondances d'efficacité-fréquence pour différentes charges pour une alimentation électrique commutée dans chaque étage d'un système, et pendant les opérations du système, la fréquence de fonctionnement de l'alimentation électrique commutée dans chaque étage est modifiée en fonction d'une condition de charge du système sur la base de la table de correspondances d'efficacité-fréquence, ce qui permet de réduire les pertes de commutation dans un circuit, et d'améliorer l'efficacité. De plus, l'unité de gestion surveille des informations du circuit, telles qu'une tension, un courant, une puissance, et une température pour s'assurer qu'un système d'alimentation électrique fonctionne dans un état stable.
PCT/CN2020/113719 2019-09-06 2020-09-07 Procédé de réglage de fréquence de fonctionnement pour une alimentation électrique commutée, et dispositif WO2021043300A1 (fr)

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CN201910843709.0A CN112467978A (zh) 2019-09-06 2019-09-06 开关电源的工作频率调整方法及装置
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CN113064369A (zh) * 2021-03-19 2021-07-02 深圳市泰祺科技有限公司 一种电源管理芯片微控制方法及系统
CN115202428B (zh) * 2021-04-12 2024-04-16 杭州中天微系统有限公司 片上系统和一种两路电压的调节方法
CN113300577B (zh) * 2021-06-22 2022-07-19 绍兴光大芯业微电子有限公司 针对开关电源进行轻负载电流检测的方法、电路结构及其功率分配电路系统
CN115097923A (zh) * 2022-06-21 2022-09-23 上海燧原科技有限公司 Ai加速卡的电压频率管控方法、装置及ai硬件加速平台
CN117118191A (zh) * 2023-02-10 2023-11-24 荣耀终端有限公司 提升电源效率的方法、电子设备及计算机可读存储介质

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