Three-phase-to-five-phase double-stage matrix converter based on Z source
A technology of matrix converter and matrix converter, which is applied in the direction of conversion equipment for intermediate conversion to DC, output power conversion device, conversion equipment without intermediate conversion to AC, etc., which can solve the problem of large volume, power grid harmonics Pollution, limited service life of inverters, etc.
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[0017] Specific implementation mode 1: Combination figure 2 with image 3 To explain this embodiment, the Z source-based three-phase to five-phase two-stage matrix converter in this embodiment includes a bipolar matrix converter, and it also includes a Z source network 3.
[0018] The bipolar matrix converter is composed of a rectifier stage circuit 1 and an inverter stage circuit 2; the Z source network 3 is connected in series between the rectifier stage circuit 1 and the inverter stage circuit 2.
Example Embodiment
[0019] Embodiment 2: The difference between this embodiment and the Z source-based three-phase-five-phase two-stage matrix converter described in the first embodiment is that the rectifier stage circuit 1 is composed of six bidirectional switches Sap, San , Sbp, Sbn, Scp and Scn composed of three-phase full bridge rectifier circuit.
Example Embodiment
[0020] Specific implementation mode three: combination Figure 4 with Figure 7 This embodiment is described. The difference between this embodiment and the Z source-based three-phase-five-phase two-stage matrix converter described in the second embodiment is that the two-way switch is composed of two IGBTs and two power diodes. The two IGBTs are connected in a common emitter type, and each IGBT is connected in parallel with a power diode, wherein the anode terminal of the power diode is connected with the emitter of the IGBT, and the cathode terminal of the diode is connected with the collector of the IGBT.
[0021] Each of the bidirectional switches has the capability of bidirectional conduction and bidirectional shutdown. However, there is no power electronic switching device that can directly implement the above-mentioned functions on the market. Therefore, in the development of bipolar matrix converters, discrete switching devices are required to form a bidirectional switch. ...
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