Simple and high-reliability overvoltage protection circuit
An overvoltage protection circuit and overvoltage protection technology, which is applied to emergency protection circuit devices, overvoltage-responsive protection, circuit devices, etc., can solve problems such as low reliability and complex overvoltage protection circuits, and improve reliability. performance, simplifies interface complexity, and reduces occupancy
Active Publication Date: 2020-12-08
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology
[0004] The technology of the present invention solves the problem: overcomes the deficiencies of the prior art, provides a simple and highly reliable overvoltage protection circuit, and solves the problem of complex overvoltage protection circuits and relatively low reliability when the power conversion circuits of existing spacecraft are connected in parallel. low problem
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[0070] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0071] The invention discloses a simple and high-reliability overvoltage protection circuit, which effectively protects the overvoltage of the output bus bar of a power conversion circuit with three parallel outputs, reduces the number of components in the circuit; and judges according to a remote measurement value Which channel is overvoltage or which channels are overvoltage at the same time reduces the number of interfaces and calculations in the entire system; the two-stage comparison of the sampling of the output bus can avoid false overvoltage errors caused by interference and glitches on the bus.
[0072] Such as figure 1 , in this embodiment, the simple and highly reliable overvoltage protection circuit includes: a first sampli...
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The invention discloses a simple and high-reliability overvoltage protection circuit which comprises three paths of sampling comparison modules, a telemetering output module and an overvoltage judgment module, the three paths of sampling comparison modules are used for sampling output voltages of three paths of power conversion circuits respectively and outputting a first comparison signal, a second comparison signal and a third comparison signal; the telemetering output module is used for outputting measurement according to the first comparison signal, the second comparison signal and the third comparison signal; and the overvoltage judgment module is used for judging the number of circuits with overvoltage protection according to the telemetering quantity output by the telemetering output module. According to the invention, the problems of complex overvoltage protection circuit and relatively low reliability during parallel output of an existing spacecraft power conversion circuit are solved, the overvoltage protection of multiple paths of power conversion circuits is judged by one overvoltage protection circuit and one telemetering quantity, and the occupation of weight resources of the whole device is reduced to a greater extent. And the interface complexity of a spacecraft energy system is greatly simplified, and meanwhile, the working reliability of the energy system is improved.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a simple and highly reliable overvoltage protection circuit. Background technique [0002] Deep space exploration satellites have an increasing demand for power supply. It is difficult for a single power conversion circuit to meet the demand, and multiple power conversion circuits are required to be used in parallel. The power conversion circuit is the control center of the spacecraft energy system. Whether it works normally directly determines the life and death of the spacecraft and the success or failure of the flight mission. It is very important to effectively identify abnormal phenomena such as overvoltage of the power conversion circuit. [0003] The outputs of conventional spacecraft power conversion circuits are individually overvoltage protected. However, for a spacecraft with parallel output of multiple power conversion circuits, if the output of...
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IPC IPC(8): H02H7/12H02H3/20H02H1/00G01R19/165
CPCH02H7/12H02H3/20H02H1/0007G01R19/165
Inventor 王玉宝张俊亭徐泽锋蔡晓东夏宁杜青陆敏
Owner SHANGHAI INST OF SPACE POWER SOURCES