24-02-2022 дата публикации
Номер: US20220060124A1
Принадлежит:
The present invention provides an adaptively modulated multi-state inverter system, comprising: a split capacitor, four bridge arms and an isolation switch group, on each of the four bridge arms a pair of complementary power switch groups is arranged; the isolation switch group comprises four fuses and six bidirectional thyristors. The output branches of the first bridge arm, the second bridge arm and the third bridge arm are respectively connected in series with a fuse to output a three-phase voltage, and at three-phase output voltage side two shared auxiliary branches are arranged, one auxiliary branch starts from the fourth bridge arm output branch on which a fuse is connected in series and is then connected to the output terminal of the three-phase voltage via three bidirectional thyristors. The other auxiliary branch starts from the DC side feed branch from the midpoint of the split capacitor, and is connected with the output terminal of the three-phase voltage via three bidirectional thyristors respectively. The invention also provides a modulating method of the multi-state inverter system. The use of the adaptive modulating technology enables the multi-state inverter to have the functions of overcurrent protection, isolation of faulty bridge arms and fault-tolerant control on any single and double bridges. 1. An adaptively modulated multi-state inverter system , comprising: a split capacitor , a first bridge arm , a second bridge arm , a third bridge arm , a fourth bridge arm and an isolation switch;wherein on each of the first, second and third bridge arms a pair of complementary power switch groups is arranged;the isolation switch group comprises a first fuse, a second fuse, a third fuse and a fourth fuse as well as a first bidirectional thyristor, a second bidirectional thyristor, a third bidirectional thyristor, a fourth bidirectional thyristor, a fifth bidirectional thyristor and a sixth bidirectional thyristor;on each output branch of the first bridge ...
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