Direct-current side harmonic suppression system and method of 12-pulse rectification system on basis of interleaved Boost APFC circuit
A pulse wave rectification and harmonic suppression technology, applied in electrical components, output power conversion devices, etc., can solve the problems of difficulty in obtaining synchronization signals and suppressing harmonics, complex active circuit structure, etc., to improve the current tracking effect, Easy to obtain, the effect of reducing the harmonic content of the input current
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[0026] Specific embodiment one: see figure 1 To explain this embodiment, the DC side harmonic suppression system based on the 12-pulse rectifier system of the interleaved parallel Boost APFC circuit described in this embodiment includes a first three-phase rectifier bridge 8-1 and a second three-phase rectifier bridge 8-2 and phase-shifting transformer 9, it also includes balanced reactor 1, interleaved parallel Boost APFC circuit 2, signal processing and control circuit 3, drive circuit 4, current sensor No. 1 5, current sensor No. 2 6 and voltage sensor 7;
[0027] The three-phase input end of the phase-shifting transformer 9 is connected to the power grid, and the first three-phase output end of the phase-shifting transformer 9 is connected to the three-phase input end of the first three-phase rectifier bridge 8-1. The second three-phase output end of the phase-shifting transformer 9 is connected to the three-phase input end of the second three-phase rectifier bridge 8-2,
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Example Embodiment
[0036] Specific implementation manner 2: see figure 1 with 2 To explain this embodiment, the difference between this embodiment and the DC side harmonic suppression system of the 12-pulse rectifier system based on the interleaved parallel Boost APFC circuit described in the first embodiment is that the interleaved parallel Boost APFC circuit 2 Including single-phase rectifier bridge 2-1, first inductor L 1 , The second inductor L 2 , The first diode D 1 , The second diode D 2 , The third diode D 21 , The fourth diode D 22 , The first capacitor C 21 , The second capacitor C 22 , The third capacitor C 23 , The first resistance R 21 , The second resistor R 22 , The first switch tube S 21 And the second switch S 22 ,
[0037] The AC signal input terminal of the single-phase rectifier bridge 2-1 is connected in parallel with the secondary winding of the balanced reactor 1, and the positive output terminal of the DC side of the single-phase rectifier bridge 2-1 is simultaneously connecte...
Example Embodiment
[0048] Specific implementation manner three: see figure 1 To illustrate this embodiment, the difference between this embodiment and the DC side harmonic suppression system of the 12-pulse rectifier system based on the interleaved parallel Boost APFC circuit described in the first embodiment is that the first switching tube S 21 MOSFET or IGBT, the second switch tube S 22 It is MOSFET or IGBT.
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