This technology belongs to the field of power supply technology, in particular to a power supply control method, device, and power supply equipment. Background Technology: 2. A power supply device is a device used to store electrical energy and provide power to a load when needed. In order to enable the power supply device to detect and supply power to the load as soon as it is connected, traditional power supply devices will always keep the power supply circuit in the on state after startup. When the power supply circuit is in the on state, the switch semiconductors inside the power supply circuit will inevitably generate switch losses, which will lead to unnecessary power loss when the power supply device is unloaded, Thus reducing the power reserve and effective utilization rate of power equipment. 3. In order to reduce the electrical energy loss of the power supply device when it is unloaded, the traditional method is to turn off the active components of the power supply device for a fixed time and then turn on the active components again when it detects that the load is not connected to the output terminal of the power supply device. However, this method may result in no-load misjudgment, which prevents timely power supply and narrows the applicability of power equipment. Technical implementation elements: 4. In view of this, this technical embodiment provides a power supply control method, device, and power supply equipment to reduce the occurrence of no-load misjudgment in the power supply equipment. 5. In the first aspect, this technical embodiment provides a power supply control method applied to a power supply device, comprising: 6. In the first power supply control mode, power supply control is performed on the power supply device based on multiple consecutive cycles, opening the power supply circuit of the power supply device during the opening period of each cycle, and closing the power supply circuit during the closing period of each cycle; Among them, the sum of the duration of each cycle's opening and closing periods is equal to the duration of each cycle. The duration of the opening period in the subsequent cycle differs by a preset step from the duration of the opening period in the previous cycle; 7. During any period of opening, if load current is detected, exit the first power supply control mode and enter the second power supply control mode to control the power supply circuit to remain open. 8. In an optional implementation method of the first aspect, the power supply control method further includes: 9. If no load current is detected during the opening time of the multiple consecutive cycles, controlling the power supply device to shut down. 10. In an optional implementation method of the first aspect, the power supply control method further comprises: 11. cyclically executing steps for power supply control of the power supply device based on multiple consecutive cycles, and recording the number of cycles; 12. If no load current is detected during the opening period of the multiple consecutive cycles, and the number of cycles reaches the preset threshold, the power supply device is controlled to shut down
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