A three-bridge-arm topology circuit, its control method, and an uninterruptible power supply system
A technology of topology circuit and three bridge arms, applied in circuit devices, emergency power supply arrangements, battery circuit devices, etc., can solve the problems of increased system cost, low integration and device utilization, etc., to achieve high power density and reduce current stress. Risk and heat loss risk, effect of reducing heat risk
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Embodiment 2
[0099] In the second embodiment, the first switching transistor Q1 to the sixth switching transistor Q6 form a traditional three-leg topology, and the structure is the same as that of the first embodiment, and will not be repeated here.
[0100] In the second embodiment, the circuit further includes: a bidirectional switching bridge arm. Wherein, the bidirectional switching bridge arm includes: a seventh switching tube Q7 , an eighth switching tube Q8 , a third inductor L3 and a switching switch 10 .
[0101] Such as Figure 11 As shown, the seventh switch tube Q7 and the eighth switch tube Q8 are connected in series between the positive output terminal of the BUS and the negative output terminal of the BUS.
[0102] The common end of the seventh switching tube Q7 and the eighth switching tube Q8 is connected to the first end of the third inductance L3, and the second end of the third inductance L3 is connected to the first end of the switch 10 .
[0103] Such as Figure 1...
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