CN-115940633-B - Power self-adaptive control method and device of switching power supply and switching power supply

CN115940633BCN 115940633 BCN115940633 BCN 115940633BCN-115940633-B

Abstract

The application is applicable to the technical field of power supplies, and particularly provides a power self-adaptive control method and device of a switching power supply and the switching power supply, wherein the method comprises the steps of obtaining working states of all power outputs of the switching power supply, wherein the switching power supply has at least two paths of power outputs, and the working states comprise a starting state and a closing state; when at least two paths of power outputs in the switching power supply are confirmed to be in a starting state, current power of each path of power output in the starting state is obtained, power change information of each path of power output is calculated according to output power historical data of each path of power output and corresponding current power, and maximum allowable output power of each path of power output is set according to the power change information of each path of power output and full power of the switching power supply. According to the application, the switching power supply is arranged to comprise at least two paths of power output, namely, the power supply adopts a scheme of one PFC (power factor correction) with a plurality of DCDC (direct current to direct current), so that the number of PFC circuits is reduced, and the hardware cost is effectively reduced.

Inventors

LIU DENGJI
LAN NING
LI TONGQING

Assignees

深圳拓邦股份有限公司

Dates

Publication Date: 20260508
Application Date: 20221117

Claims (9)

1. A power adaptive control method for a switching power supply, comprising: Acquiring working states of all power outputs of the switching power supply, wherein the switching power supply has at least two paths of power outputs, and the working states comprise a starting state and a closing state; when at least two paths of power outputs in the switching power supply are confirmed to be in a starting state, acquiring the current power of each path of power output in the starting state; Respectively calculating power change information of each path of power output according to the output power history data of each path of power output and the corresponding current power; Setting the maximum allowable output power of each path of power output according to the power change information of each path of power output and the full power of the switching power supply; The method further includes, after the step of obtaining the working state of all power outputs of the switching power supply, wherein the switching power supply has at least two paths of power outputs, the working state includes a power-on state and a power-off state: when only one path of power output in the switching power supply is confirmed to be in a starting state, acquiring the required power of the power output in the starting state; and regulating the actual output power of the power output in the starting state according to the required power.
2. The power adaptive control method of a switching power supply according to claim 1, wherein said step of calculating power variation information of each power output according to output power history data of each power output and corresponding current power comprises: For each path of power output, acquiring historical data of output power of corresponding power output in preset time; And calculating a difference value according to the current power of the same power output and the historical data to obtain power change information of the corresponding power output.
3. The power adaptive control method of a switching power supply according to claim 1, wherein the step of setting the maximum allowable output power of each path of power output according to the power variation information of each path of power output and the full power of the switching power supply comprises: when the output power of the power output of the current path is increased, reducing the output power of the other power outputs except the power output of the current path to preset power, wherein the preset power is obtained by dividing the full power by the number of paths of the power output in a starting state; And calculating the maximum allowable output power of the power output of the current path according to the full power and the output power of the rest power outputs.
4. The power adaptive control method of a switching power supply according to claim 1, wherein the step of setting the maximum allowable output power of each path of power output according to the power variation information of each path of power output and the full power of the switching power supply comprises: when the output power of the power output of the current path is reduced, calculating to obtain the residual power according to the full power and the current power of the power output of the current path; And adjusting the output power of the other power outputs except the current power output to target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.
5. A power adaptive control apparatus for a switching power supply, comprising: The working state acquisition unit is used for acquiring working states of all power outputs of the switching power supply, wherein the switching power supply has at least two paths of power outputs, and the working states comprise a starting state and a closing state; the current power acquisition unit is used for acquiring the current power of each power output in the starting state when confirming that at least two paths of power outputs in the switching power supply are in the starting state; The power change information calculation unit is used for calculating power change information of each path of power output according to the output power history data of each path of power output and the corresponding current power respectively; the allowable output power adjusting unit is used for setting the maximum allowable output power of each path of power output according to the power change information of each path of power output and the full power of the switching power supply; The device comprises: The required power acquisition unit is used for acquiring the required power of the power output in the starting state when confirming that only one path of power output in the switching power supply is in the starting state; And the actual output power adjusting unit is used for adjusting the actual output power of the power output in the starting state according to the required power.
6. The power adaptive control apparatus of a switching power supply according to claim 5, wherein the power variation information calculation unit includes: The historical data acquisition subunit is used for acquiring the historical data of the output power of the corresponding power output in the preset time aiming at each path of power output; And the difference value calculating subunit is used for calculating a difference value according to the current power of the same power output and the historical data to obtain power change information of the corresponding power output.
7. The power adaptive control apparatus of a switching power supply according to claim 5, wherein said allowable output power adjusting unit further includes: The first power adjustment subunit is used for reducing the output power of the other power outputs except the current power output to preset power when the output power of the current power output is increased, wherein the preset power is calculated by dividing the full power by the number of the power outputs in a starting state; and the first power calculation subunit is used for calculating the maximum allowable output power of the power output of the current path according to the full power and the output power of the rest power outputs.
8. The power adaptive control apparatus of a switching power supply according to claim 5, wherein said allowable output power adjusting unit further includes: the second power adjustment subunit is used for calculating the residual power according to the full power and the current power of the current power output of the current path when the power change information of the current power output of the current path is that the output power is reduced; and the second power calculation subunit is used for adjusting the output power of the other power outputs except the current power output to the target power, wherein the target power is calculated by dividing the remaining power by the number of the other power outputs.
9. A switching power supply, characterized in that it comprises a power adaptive control device of a switching power supply as claimed in any one of claims 5 to 8.

Description

Power self-adaptive control method and device of switching power supply and switching power supply Technical Field The invention belongs to the technical field of power supplies, and particularly relates to a power self-adaptive control method and device of a switching power supply and the switching power supply. Background A switching power supply (Switch Mode Power Supply, SMPS for short), also called a switching power supply or a switching converter, is a high-frequency electric energy conversion device and is a power supply. The function is to convert a voltage of one level into a voltage or current required by the user terminal through different types of structures. Existing switching power supplies typically employ a PFC (Power Factor Correction ) with a DCDC output scheme. When multiple outputs exist in the product, how many outputs need to be correspondingly configured with how many power supplies, for example, in a power conversion cabinet system, if 8 outputs are shared in the power conversion cabinet system, 8 power supplies are needed, and the hardware cost is high. Disclosure of Invention The invention provides a power self-adaptive control method of a switching power supply, which solves the problems that the switching power supply in the prior art is complex in circuit structure and increases hardware cost due to the fact that one PFC (power factor correction) is matched with one DCDC. The invention is realized in such a way that a power self-adaptive control method of a switching power supply comprises the following steps: acquiring working states of all power output of a switching power supply, wherein the switching power supply has at least two paths of power output, and the working states comprise a starting state and a closing state; When at least two paths of power outputs in the switching power supply are confirmed to be in a starting state, acquiring the current power of each path of power output in the starting state; respectively calculating power change information of each path of power output according to the output power history data of each path of power output and the corresponding current power; and setting the maximum allowable output power of each power output according to the power change information of each power output and the full power of the switching power supply. Further, the method further includes, after the step of obtaining the working state of all power outputs of the switching power supply, wherein the switching power supply has at least two paths of power outputs, the working state includes a start-up state and a shut-down state, the method further includes: when only one path of power output in the switching power supply is confirmed to be in a starting state, acquiring the required power of the power output in the starting state; And regulating the actual output power of the power output in the starting state according to the required power. Further, the step of calculating power change information of each path of power output according to the output power history data of each path of power output and the corresponding current power comprises the following steps: For each path of power output, acquiring historical data of output power of corresponding power output in preset time; and calculating a difference value according to the current power and the historical data of the same power output to obtain power change information of the corresponding power output. Further, the step of setting the maximum allowable output power of each power output according to the power variation information of each power output and the full power of the switching power supply includes: When the output power of the power output of the current path is increased, reducing the output power of the other power outputs except the power output of the current path to preset power, wherein the preset power is obtained by dividing full power by the number of paths of the power output in a starting state; And calculating the maximum allowable output power of the power output of the current path according to the output power of the full power and the output power of the rest power outputs. Further, the step of setting the maximum allowable output power of each power output according to the power variation information of each power output and the full power of the switching power supply includes: When the output power of the power output of the current path is reduced, calculating to obtain the residual power according to the full power and the current power of the power output of the current path; And adjusting the output power of the other power outputs except the current power output of the current path to target power, wherein the target power is calculated by dividing the remaining power by the path number of the other power outputs. In a second aspect, the present application further provides a power adaptive control apparatus for a switching power supply, including: The working state