Reversion subversion protector for three-phase thyristor and full control bridge active reverser
A source inverter and inverter subversion technology, applied in the field of control, can solve problems such as incomplete protection functions, and achieve the effect of strong versatility
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[0026] The subversion of the inverter refers to the state where the normal working conditions of the inverter are damaged. It includes the straight-through, cut-off, false triggering and loss of triggering of converter faults and so on. From the perspective of the phenomenon, the current cannot be successfully transferred from the conduction valve to the successive valve according to the normal commutation procedure. There are two forms of expression: one is that the fault current passes through two valves connected to one phase of the transformer, that is, single-phase subversion, such as Figure 5 As shown, the other is that under the simultaneous action of the transformer phase-to-phase voltage and the DC voltage, a large fault current flows through the transformer winding and the DC circuit, that is, two-phase subversion, such as Figure 6 shown.
[0027] The external factors causing the subversion of the inverter include the increase of the DC voltage (corresponding to ...
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