Multi-switch tube parallel fault detection method, detection circuit and DC conversion circuit
A DC conversion circuit and fault detection technology, applied in the field of power electronics, can solve problems such as excessive current stress, unfavorable DC conversion circuit overcurrent or heat dissipation capacity, damage, etc., and achieve the effect of avoiding current stress exceeding the standard
Active Publication Date: 2017-07-28
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0002] Usually, if only one switch tube is used in the DC conversion circuit, it is not conducive to improving the overcurrent or heat dissipation capacity of the DC conversion circuit, so it is designed as a structure in which multiple switch tubes are connected in parallel. When the switch tube is damaged or driven abnormally and cannot work, the remaining switch tubes must bear a large current, and long-term operation will cause the current stress to exceed the standard and be damaged
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[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0039] The embodiment of the present invention discloses a multi-switching tube parallel fault detection method to avoid damage to the parallel switching tubes in the DC conversion circuit due to excessive current stress, including: performing fault detection on each unit to be tested in the DC conversion circuit one by one , each of the units to be tested is composed of a switch tube in a parallel structure of switch tubes and a driving circuit of the switch t...
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The present application discloses a multi-switch parallel fault detection method, a detection circuit, and a DC conversion circuit, wherein the method includes: performing fault detection on each unit to be tested in the DC conversion circuit one by one, and each unit to be tested is composed of One switch tube in the parallel connection structure of switch tubes and the drive circuit of the switch tube; wherein, the fault detection method for each unit to be tested includes: controlling the drive circuit in the unit to be tested to send a drive signal to the switch tube , the driving signals of the switching tubes in the remaining several units to be tested are kept closed; the output voltage of the DC conversion circuit is obtained; and it is judged whether the output voltage of the DC conversion circuit reaches a preset voltage, and the judgment result is saved to avoid The switch tubes connected in parallel in the DC conversion circuit are damaged due to excessive current stress.
Description
technical field [0001] The invention relates to the technical field of power electronics, and more specifically, to a multi-switch tube parallel fault detection method, a detection circuit and a DC conversion circuit. Background technique [0002] Usually, if only one switch tube is used in the DC conversion circuit, it is not conducive to improving the overcurrent or heat dissipation capacity of the DC conversion circuit, so it is designed as a structure of multiple switch tubes connected in parallel. When the switch tube is damaged or driven abnormally and cannot work, the remaining switch tubes must bear a large current, and long-term operation will cause the current stress to exceed the standard and be damaged. Contents of the invention [0003] In view of this, the present invention provides a multi-switch tube parallel fault detection method, a detection circuit and a DC conversion circuit, so as to prevent the parallel switch tubes in the DC conversion circuit from ...
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IPC IPC(8): G01R31/00G01R31/28
Inventor 耿后来徐清清邢军李浩源
Owner SUNGROW POWER SUPPLY CO LTD