2results about How to "Solve burnt" patented technology

The utility model relates to power semiconductor's test technical field especially, and more particularly to a kind of double-pulse test structure of power semiconductor, the structure includes: laminated busbar and the protection mechanism being set on the laminated busbar;The protection mechanism includes: switch tube, auxiliary diode, first accommodating groove and second accommodating groove;The switch tube is connected with the auxiliary diode, the first accommodating groove and the second accommodating groove are all set on the laminated busbar, the switch tube is located in the first accommodating groove, the auxiliary diode is located in the second accommodating groove.By the structure, avoid the failure of the device under test when double-pulse test is carried out to the device under test to exert larger voltage and current, to avoid making the test loop be in short-circuit uncontrollable state, test loop current is constantly increasing until the device burns, prevent the entire test system from burning, improve the reliability and security in the double-pulse test process to the device under test.

The invention provides a communication device and a communication method, the communication device comprises a positive input end, a negative input end, a pre-stage circuit device and a post-stage circuit device, one end of the post-stage circuit device is connected with an output end of the pre-stage circuit device, and the other end of the post-stage circuit device is connected with the negative input end. The preceding-stage circuit device comprises a controller and a switching device, the positive input end is connected with the first end of the switching device, the second end of the switching device is connected with the controller, the third end of the switching device is connected with a ground wire, and the controller is used for detecting the voltage difference between the first end and the third end of the switching device; and controlling the switch-on or switch-off of the switching device according to the voltage difference. Based on the above technical problem, the problem of short circuit to ground caused by reverse connection between the RTN of the power distribution system and the-48V of the communication device can be solved, and the problem of carbonization or burning of parts such as a single board, a cable and a device caused by short circuit to ground is further avoided.