Single-tap-inductor Z-source inverter
A source inverter, tapped inductor technology, applied in electrical components, high-efficiency power electronic conversion, conversion of AC power input to DC power output, etc. and other problems, to achieve the effects of suppressing resonant current, large voltage gain, and reducing voltage stress
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[0029] Specific implementation mode 1: the following combination Figure 2-Figure 4 To explain this embodiment, the single-tap inductor Z-source inverter described in this embodiment includes a three-phase inverter 1 and an output filter 2, and it also includes a single-tap inductor Z-source network 3, and the output end of the DC power supply is connected to a single The input end of the tapped inductor Z source network 3, the output end of the single tapped inductor Z source network 3 is connected to the input end of the three-phase inverter 1, the output end of the three-phase inverter 1 is connected to the input end of the output filter 2, and the output The output voltage of the output terminal of filter 2 supplies power to the load;
[0030] The single-tap inductor Z source network 3 includes a capacitor C, a tapped inductor L, a diode D1, a diode D2, a diode D3, and an insulated gate bipolar transistor S1;
[0031] The positive output terminal of the DC power supply is conne...
Example Embodiment
[0033] Specific implementation manner 2: the following combination Figure 2-Figure 4 This embodiment will be described. This embodiment will further explain the first embodiment. The modulation method of the boost control mode of the single-tap inductor Z-source inverter is:
[0034] There are two states to set up a single-tap inductor Z-source inverter:
[0035] State 1. Through state: Turn off the insulated gate bipolar transistor S1 to make the upper and lower arms of the three-phase inverter 1 pass through. At this time, the single-tap inductor Z source network 3 is disconnected from the three-phase inverter 1 ;
[0036] State two, non-through state: make the three-phase inverter 1 in a normal working state, turn on the insulated gate bipolar transistor S1, at this time, the single-tap inductor Z source network 3 and the three-phase inverter 1 provide energy for the load at the same time;
[0037] Set in a switching cycle T, the duration of state 1 is T 0 , The through duty ratio...
Example Embodiment
[0070] Specific implementation manner three: the following combination Figure 5-Figure 7 This embodiment is described. This embodiment will further explain the first embodiment. The space vector modulation method of the single-tap inductor Z-source inverter is:
[0071] There are 6 effective voltage vectors, 2 zero voltage vectors, and 3 through vectors in the modulation method. The 6 effective voltage vectors differ by 60° in sequence, and the direction is fixed. The space is divided into six sectors, and the two zero voltage vectors are fixed. At the origin of the space vector diagram, the three through vectors are generated by the three pairs of bridge arms of the three-phase inverter 1. The reference vector passes through two adjacent effective voltage vectors U u , U v And the corresponding zero voltage vector U 00 Synthesis, through the through vector U shoot To achieve boost, the duty cycle of the two effective voltage vectors is d u And d v , The duty cycle of the zero ve...
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