Multi-level inverter
A multi-level inverter, inverter circuit technology, applied in electrical components, AC power input into DC power output, output power conversion devices, etc., can solve the problem of electromagnetic interference at the DC end, reduce the inverter Power efficiency, inconsistent control circuit parameters, etc., to achieve the effect of improving electromagnetic interference, improving inductor utilization, and reducing DC electromagnetic interference.
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Embodiment 1
[0032] The multilevel inverter of this example, such as figure 1 As shown, it includes a DC energy generating device Vdc, an AC energy generating device Vac, a modulation circuit and an MCU, and is characterized in that it also includes an inverter circuit, and the inverter circuit includes a switch module S1, a switch module S2, and a switch module three S3, switch module four S4, switch module five S5, switch module six S6, switch module seven S7, switch module eight S8, switch module nine S9, switch module diode one D1, diode two D2, diode three D3, diode four D4, Diode 5 D5, Diode 6 D6, Diode 7 D7, Diode 8 D8, Diode 9 D9, Inductor 1 L1, Inductor 2 L2, Capacitor 1 C1 and Capacitor 2 C2. The anode of switch mode diode one D1 is connected to the input terminal of switch module one S1, the output terminal of switch module one S1 is connected with the input terminal of switch module two S2, the input end of switch module three S3, and the input terminal of switch module one S3 ...
Embodiment 2
[0039] When the multilevel inverter in Embodiment 1 is working, when the output is a positive half cycle, the MCU controls the switch module two S2, the switch module seven S7 and the switch module eight S8 to open in the whole positive half cycle, and at the same time makes the switch modules three S3, The switch module six S6 and the switch module nine S9 are cut off, and the switch module one S1 and the switch module five S5 are switched at high frequency, so that the outside of the inductor one L1 and the inductor two L2 outputs the positive half cycle of the AC power.
[0040] When the output is a negative half cycle, the MCU controls switch module three S3, switch module six S6 and switch module nine S9 to turn on during the entire negative half cycle, and at the same time makes switch module two S2, switch module seven S7 and switch module eight S8 cut off, and makes the switch Module 1 S1 and switch module 4 S4 work in high-frequency switching, so that the outside of in...
Embodiment 3
[0047]During the negative half cycle of the AC energy generating device Vac at the outer end of the inductor one L1 and the inductor two L2, the switch module three S3, the switch module six S6 and the switch module nine S9 are opened in the entire positive half cycle; when the switch module one S1 is high When the high-frequency trigger signal is at a high level and the high-frequency trigger signal of the switching module four S4 is at a low level, the positive pole of the DC energy generating device Vdc, the switching module one S1, the switching module three S3, the inductor two L2, the AC energy generating device Vac, Inductor 1 L1, diode 7 D7, switch module 6 S6, capacitor 2 C2 and the negative pole of DC energy generating device Vdc constitute a current loop in sequence, and its current direction is as follows: Figure 7 shown.
[0048] When the high-frequency trigger signals of switch module one S1 and switch module four S4 are at high level, switch module one S1 and s...
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