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公开(公告)号：US11223291B2
公开(公告)日：2022-01-11
申请号：US17268536
申请日：2019-08-15
发明人： Chen Xie , Zhongfeng Zhang , Jie Tian , Yeyuan Xie , Haiying Li , Yu Wang , Jian Ge
摘要： A bipolar bidirectional DC converter comprises at least two valve group series (101, 102) and at least six magnetic elements (103), and said valve group series are divided into a Type-I valve group series (102) and a Type-II valve group series (101) each valve group series (101, 102) comprises a high-voltage DC port, a low-voltage DC port and at least three AC ports, and each AC port is connected to a magnetic element (103); and the other ends of the magnetic elements (103), which are connected to all the AC ports in the same valve group series (101, 102), are connected.
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公开(公告)号：US11342744B2
公开(公告)日：2022-05-24
申请号：US17251274
申请日：2019-04-01
发明人： Yeyuan Xie , Haiying Li , Yu Wang , Zhongfeng Zhang , Dongming Cao
摘要： A multi-voltage level direct current grid system and a control protection method, the direct current grid system comprising: at least two direct current buses; at least one direct current transformer, one end of which is connected to a first direct current bus while another end is connected to a second direct current bus or a lead-out wire, which may achieve direct current voltage conversion; and at least one lead-out wire current limiter, one end of the lead-out wire current limiter being connected to the second direct current bus while another end is connected to the lead-out wire; the lead-out wire current limiter comprises a first current-limiting unit, and the first current limiting unit comprises a group of direct current switches, as well as a first bypass switch and a first current-limiting resistor unit that are connected in parallel.
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公开(公告)号：US11264891B2
公开(公告)日：2022-03-01
申请号：US16966459
申请日：2019-01-21
发明人： Yeyuan Xie , Haiying Li , Tiangui Jiang , Minglian Zhu , Dongming Cao , Zhongfeng Zhang
摘要： A redundant energy acquisition circuit of a power module includes at least one power semiconductor device, a first capacitor, and a first bypass switch. The redundant energy acquisition circuit of the power module includes: a power supply board acquiring energy from the first capacitor, supplying power to a control board, and charging a discharge circuit. A first charging circuit has one end connected to a positive electrode of the first capacitor and another end connected to the discharge circuit, and charges the discharge circuit when the power supply board is not operating normally. The control board controls the discharge circuit to close. The discharge circuit discharges and triggers the first bypass switch to close after the discharge circuit is closed.
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