Power transmission system and method

Abstract

The invention discloses an electric energy transmission system and method. The electric energy transmission system includes: a first main switch, which transmits electric energy from a first interface to an output end; a first path, which transmits a first current from the first interface to an output end and controls the first The current is within the first predetermined range; the second main switch transmits electric energy from the second interface to the output terminal; the second path transmits the second current from the second interface to the output terminal and controls the second current to be within the second predetermined range; And the control circuit group, if when the second power supply is supplying power to the output terminal via the second interface, the control circuit group detects that an available first power supply is connected to the first interface, and the control circuit group disconnects the second main switch and the second main switch. The two channels are turned on and the first channel is turned on. After the first switching time interval counted from the moment when the first channel is turned on, the control circuit group turns on the first main switch. The invention can prevent the voltage jump caused by the voltage difference between the first power supply and the second power supply on the output terminal.

Description

technical field [0001] The present invention relates to the technical field of electric energy transmission, in particular to an electric energy transmission system and method. Background technique [0002] figure 1 Shown is a prior art power transfer system 100 . The power transmission system 100 selectively transmits power from an adapter interface 102A or a Universal Serial Bus (USB) interface 102U to a load 108 . More specifically, the power transfer system 100 includes a switch 106A connected between the adapter interface 102A and the load 108 , and a switch 106U connected between the USB interface 102U and the load 108 . If the USB power supply 134U is plugged into the USB interface 102U, and no adapter power supply is plugged into the adapter interface 102A, then the power transmission system 100 can transmit power from the USB interface 102U to the load by turning on the switch 106U and turning off the switch 106A. 108. When the USB power supply is supplying powe...

AI Technical Summary

Problems solved by technology

If the higher output voltage adapter power supply 134A is plugged into the adapter interface 102A while the lower output voltage USB power supply 134U is supplying power to the load 108, it may cause a voltage jump on node 110

If the difference between the output voltages of the adapter power supply 134A and the USB power supply 134U is relatively large, the voltage jump may be relatively high, which may also damage the power transmission system 100

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