Serially connected 24 pulse rectifier using DC side voltage injection method
A DC side voltage and pulse wave rectification technology, applied in the direction of converting AC power input into DC power output, irreversible AC power input into DC power output, electrical components, etc., to reduce harmonic content, easy to implement, design The effect of simple method
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[0021] Example one: such as figure 1 As shown, the series-type 24-pulse rectifier using the DC side voltage injection method involved in this embodiment includes an input inductor, an isolation transformer, a first group of three-phase full-bridge rectifier circuits, and a second group of three-phase full-bridge rectifiers. Circuit, output capacitor, load, injection transformer and single-phase full-wave rectifier circuit, input inductance and three-phase AC voltage u sa , U sb , U sc Connected in series, the rectifier is equivalent to a current source converter; the input end of the isolation transformer is connected to the right side of the input inductor, the primary winding of the isolation transformer adopts delta connection, and the two secondary windings of the isolation transformer adopt delta connection and star connection respectively The two secondary windings of the isolation transformer output two sets of three-phase voltages with a phase difference of 30°; the in...
Example Embodiment
[0022] Embodiment two: such as figure 1 As shown, this embodiment relates to a series-type 24-pulse rectifier using the DC side voltage injection method, and the input inductor includes three inductors L of the same size. s , These three inductances and the three-phase AC voltage u sa , U sb , U sc Connected in series, the rectifier is equivalent to a current source converter; the output capacitor is composed of two identical large capacitors in series, the load voltage ripple is small, and it is equivalent to a constant voltage load.
Example Embodiment
[0023] Example three: such as figure 1 with 2 As shown, this embodiment relates to a series-type 24-pulse rectifier using the DC side voltage injection method. The isolation transformer is composed of core column 1, core column 2, and core column three and has a symmetrical structure. There are three windings on the core column, one primary winding and two secondary windings, the turns ratio of the three windings is Winding a, winding b, and winding c are the primary windings of the isolation transformer, which adopt delta connection, winding a1, winding b1, and winding c1 are the secondary windings of delta connection, winding a2, winding b2, and winding c2 are the secondary windings of star connection. Side winding; winding a, winding a1 and winding a2 are located on the same magnetic core column, winding b, winding b1 and winding b2 are located on the same magnetic core column, winding c, winding c1 and winding c2 are located on the same magnetic core column.
[0024] The iso...
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