Method for automatic recongniting phase-sequence of phase control rectifier and its phase control rectifier
A phase-controlled rectification and automatic identification technology, which is applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., to achieve the effect of simplifying the installation and debugging process and simple circuit design
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[0037] The three-phase fully-controlled bridge rectifier circuit is shown in Figure 1. Each bridge arm is composed of a half-controlled device or a group of half-controlled devices through series-parallel technology (a bridge arm is called a valve at this time), and the half-controlled device generally uses a thyristor. It is customary to hope that the six bridge arms are triggered in the order from T1 to T6, so the six bridge arms are numbered in the order shown in Figure 1, where T1 and T4 are connected to the A phase of the power supply, T3 and T6 are connected to the B phase of the power supply, and T2 And T2 connected to the C phase. The cathodes of the upper three bridge arms (T1, T3, T5) are connected together, called a common cathode group, and the anodes of the lower three bridge arms (T4, T6, T2) are connected together, called a common anode group, common cathode The group and the common anode group must have a bridge arm of a different phase conduction at the same ...
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