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CN-122001177-A - Output adapting method of power conversion circuit, charger and computer program product

CN122001177ACN 122001177 ACN122001177 ACN 122001177ACN-122001177-A

Abstract

The application relates to an output adaptation method, an adapter and a computer program product of a power conversion circuit, wherein in the technical scheme of the embodiment of the application, the output voltage of the power conversion circuit is controlled to gradually increase with a preset initial voltage value until the output current is changed from more than 0 to 0, the overvoltage protection of a load is triggered, and then a target output gear is determined according to the previous output voltage value when the output current is changed from more than 0 to 0, so that the output voltage of the power conversion circuit is ensured to adapt to the power supply voltage range of load adaptation, manual configuration by a user is not needed, and the problem that the power supply voltage gear of the load needs to be manually adapted is solved.

Inventors

  • FENG JIE
  • WANG LEI
  • CHEN XI

Assignees

  • 深圳市正浩创新科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250616

Claims (10)

  1. 1. An output adaptation method of a power conversion circuit, wherein an output voltage of the power conversion circuit comprises n output gears, n being greater than 1, the method comprising: controlling the output voltage of the power conversion circuit to be output with a preset initial voltage value, and obtaining output current; Controlling the output voltage to gradually increase until the output current is changed from 0 to 0; And determining a target output gear in the n output gears according to a first voltage value of the output voltage, wherein the first voltage value is the previous output voltage value when the output current is changed from more than 0 to 0.
  2. 2. The method of claim 1, wherein each of the output gears includes a corresponding upper limit value and a corresponding lower limit value, the controlling the output voltage to gradually increment comprising: before the output voltage reaches a first percentage of an upper limit value corresponding to each output gear, the output voltage is controlled to gradually increase in a first preset step size; And when the output voltage reaches more than a first percentage of the upper limit value corresponding to each output gear, controlling the output voltage to gradually increase in a second preset step length, wherein the first preset step length is greater than or equal to the second preset step length, and the first percentage is greater than or equal to 50% and less than 100%.
  3. 3. The method of claim 1, wherein the n output gears correspond to n voltage intervals, and wherein determining a target output gear among the n output gears from a first voltage value of the output voltage comprises: Comparing the first voltage value with the limit values of the n voltage intervals to determine a first voltage interval in which the first voltage value is located; And determining the output gear of the lower one gear of the output gear corresponding to the first voltage interval as the target output gear.
  4. 4. The method according to claim 1, wherein the method further comprises: and under the condition that the output voltage is gradually increased to the maximum output voltage of the power conversion circuit and the output current is larger than 0, determining that the highest output gear in the n output gears is the target output gear.
  5. 5. The method according to any one of claims 1 to 4, further comprising, after determining the target output gear: In the case where the output current is changed from greater than 0 to 0, the step of controlling the output voltage of the power conversion circuit to be output at a preset initial voltage value is performed.
  6. 6. The method according to any one of claims 1 to 4, wherein after determining the target output gear, the method further comprises: changing the output voltage of the power conversion circuit by a third preset step length; Calculating the output power of the power conversion circuit after each voltage change, and determining the maximum output power; and controlling the output voltage of the power conversion circuit to be an output voltage value corresponding to the maximum output power.
  7. 7. The method of claim 6, wherein each of the output gears includes a corresponding upper limit value and a corresponding lower limit value, the target output gear includes a target lower limit value and a target upper limit value, and wherein changing the output voltage of the power conversion circuit in a third preset step size includes: Taking the lower limit value corresponding to the lowest output gear, the preset initial voltage value or the target lower limit value as the initial value of the output voltage, and increasing the initial value to the target upper limit value by the third preset step length And taking the target upper limit value as an initial value of the output voltage, and reducing the target upper limit value, the preset initial voltage value or a lower limit value corresponding to the lowest output gear by the third preset step length.
  8. 8. The method according to claim 7, wherein: Recording an initial value of the output voltage and/or the preset initial voltage value of the connected load as the voltage value when the output current is changed from more than 0 to 0 in the process of increasing to the target upper limit value by the third preset step length, or, And recording the initial value of the output voltage and/or the preset initial voltage value of the connected load when the voltage value of the output current is changed from more than 0 to 0 in the lower limit value of the output gear which is reduced to the target lower limit value, the preset initial voltage value or the lowest by the third preset step length.
  9. 9. A charger is characterized by comprising a power conversion circuit and a controller, wherein the output voltage of the power conversion circuit comprises n output gears, and the controller is used for executing the output adaptation method of the power conversion circuit according to any one of claims 1-8.
  10. 10. A computer program product, characterized in that it, when run on a computer, causes the computer to perform the output adaptation method of a power conversion circuit as claimed in any one of claims 1 to 8.

Description

Output adapting method of power conversion circuit, charger and computer program product Technical Field The present application relates to power electronics, and more particularly, to an output adapting method for a power conversion circuit, a charger and a computer program product. Background For a direct current adapter with a wide output voltage range, whether any electronic equipment can be powered can work normally is an important index for influencing user experience. However, the input voltage range of the electronic devices on the market is large, and the user is often required to set the output voltage of the adapter according to the input voltage range of the electronic device or select a suitable adapter by itself. If the user selects an unsuitable output voltage gear or adapter, the situation that power cannot be supplied and even the equipment is damaged can occur. Disclosure of Invention The application aims to provide an output adaptation method of a power conversion circuit, a charger and a computer program product, and aims to solve the problem that a power supply voltage gear of equipment needs to be manually adapted. In a first aspect, an embodiment of the present application provides an output adapting method of a power conversion circuit, where an output voltage of the power conversion circuit includes n output gears, n is greater than 1, and the method includes: controlling the output voltage of the power conversion circuit to be output with a preset initial voltage value, and obtaining output current; Controlling the output voltage to gradually increase until the output current is changed from 0 to 0; And determining a target output gear in the n output gears according to a first voltage value of the output voltage, wherein the first voltage value is the previous output voltage value when the output current is changed from more than 0 to 0. In some embodiments, each of the output gears includes a corresponding upper limit value and a corresponding lower limit value, the controlling the output voltage to gradually increment includes: before the output voltage reaches a first percentage of an upper limit value corresponding to each output gear, the output voltage is controlled to gradually increase in a first preset step size; And when the output voltage reaches more than a first percentage of the upper limit value corresponding to each output gear, controlling the output voltage to gradually increase in a second preset step length, wherein the first preset step length is greater than or equal to the second preset step length, and the first percentage is greater than or equal to 50% and less than 100%. In some embodiments, the n output gears correspond to n voltage intervals, and the determining a target output gear from the n output gears according to the first voltage value of the output voltage includes: Comparing the first voltage value with the limit values of the n voltage intervals to determine a first voltage interval in which the first voltage value is located; And determining the output gear of the lower one gear of the output gear corresponding to the first voltage interval as the target output gear. In some embodiments, the method further comprises: and under the condition that the output voltage is gradually increased to the maximum output voltage of the power conversion circuit and the output current is larger than 0, determining that the highest output gear in the n output gears is the target output gear. In some embodiments, after determining the target output gear, further comprising: In the case where the output current is changed from greater than 0 to 0, the step of controlling the output voltage of the power conversion circuit to be output at a preset initial voltage value is performed. In some embodiments, after determining the target output gear, the method further comprises: changing the output voltage of the power conversion circuit by a third preset step length; Calculating the output power of the power conversion circuit after each voltage change, and determining the maximum output power; and controlling the output voltage of the power conversion circuit to be an output voltage value corresponding to the maximum output power. In some embodiments, each of the output gears includes a corresponding upper limit value and a corresponding lower limit value, the target output gear includes a target lower limit value and a target upper limit value, and the changing the output voltage of the power conversion circuit in a third preset step includes: Taking the lower limit value corresponding to the lowest output gear, the preset initial voltage value or the target lower limit value as the initial value of the output voltage, and increasing the initial value to the target upper limit value by the third preset step length And taking the target upper limit value as an initial value of the output voltage, and reducing the target upper limit value, the preset initial voltag