A general-purpose twelve-phase rectifier bridge fault detection method
A fault detection, twelve-phase technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of unable to display generator voltage and generator status, unable to collect waveforms and view historical faults, unable to complete motor detection, etc. problem, to achieve the effect of simple structure, convenient operation and strong versatility
Active Publication Date: 2019-04-23
WUHAN NEW ENERGY INST OF ACCESS EQUIP & TECH
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Problems solved by technology
[0002] The existing 12-phase rectification fault detection device is completed by a 51 single-chip microcomputer through a voltage comparison chip. It is a digital fault detection device. The hardware circuit of the digital fault detection device is designed according to the voltage of the matched motor, which cannot be completed. The detection of most motors on the market is not universal
And the digital fault detection device judges the state of the corresponding diode by the color of the flashing LED light, which cannot display the voltage and state of the generator, let alone collect waveforms and view historical faults
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[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0016] Such as figure 1 The schematic diagram of the 12-phase rectifier generator is shown, and the 12-phase rectification is formed by connecting four sets of three-phase uncontrollable rectifier bridges in parallel, among which U1, V1, W1, U2, V2, W2, U3, V3, W3, U4, V4 and W4 are four sets of three-phase voltages, a total of twelve phase voltages, and P and N are rectified DC voltages.
[0017] In order to judge rectifier diode faults more accurately and comprehensively, after simulating all possible fault combination states, according to the analysis of the simulation results, it can be known that as long as all the upper diodes or all the lower diodes are not open circuit faults at the same time, the detection diode The volt...
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The invention discloses a general-purpose twelve-phase rectifier bridge fault detection method and device. It includes AD sampling circuit, digital signal processor, display screen, first analog multiplexer and second analog multiplexer, first analog multiplexer and second analog multiplexer The input terminals are respectively connected to the twelve-phase rectifier bridge through voltage dividing resistors, the control terminals of the first analog multiplexer and the second analog multiplexer are connected to the control terminal of the digital signal processor, and the first analog multiplexer The output terminals of the user and the second analog multiplexer are respectively connected to the input terminal of the AD sampling circuit through the isolation operational amplifier and the optocoupler, the output terminal of the AD sampling circuit is connected to the input terminal of the digital signal processor, and the output terminal of the digital signal processor is connected to the display Screen. The invention collects the diode voltage through an AD sampling circuit, determines the state of the corresponding diode through digital signal processing and analysis data, and displays various fault states through a display screen, and has simple structure, convenient operation and strong versatility.
Description
technical field [0001] The invention belongs to the technical field of rectifier bridge device fault detection, and in particular relates to a general-purpose twelve-phase rectifier bridge fault detection method. Background technique [0002] The existing 12-phase rectification fault detection device is completed by the 51 single-chip microcomputer through the voltage comparison chip. It is a digital fault detection device. The hardware circuit of the digital fault detection device is designed according to the voltage of the matched motor, which cannot be completed. The detection of most motors on the market is not universal. Moreover, the digital fault detection device judges the state of the corresponding diode by the color of the flashing LED light, and cannot display the voltage and state of the generator, let alone collect waveforms and view historical faults. Contents of the invention [0003] The object of the present invention is to provide a general-purpose twelv...
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IPC IPC(8): G01R31/28
CPCG01R31/282G01R31/2836
Inventor 孙建龙武美娜卿意刘娣
Owner WUHAN NEW ENERGY INST OF ACCESS EQUIP & TECH