Invention Grant
- Patent Title: Voltage balancing system and method for multilevel converters
- Patent Title (中): 多电平转换器的电压平衡系统和方法
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Application No.: US13853335Application Date: 2013-03-29
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Publication No.: US09246407B2Publication Date: 2016-01-26
- Inventor: Stefan Schroeder , Qingyun Chen
- Applicant: GENERAL ELECTRIC COMPANY
- Applicant Address: US NY Niskayuna
- Assignee: General Electric Company
- Current Assignee: General Electric Company
- Current Assignee Address: US NY Niskayuna
- Agent Nitin N. Joshi
- Main IPC: H02M7/00
- IPC: H02M7/00 ; H02M7/483 ; H02M1/00 ; H02M7/487

Abstract:
A method of operating a flying capacitor multilevel converter having a direct current link and a plurality of phase legs each having a plurality of flying capacitors includes employing redundant states to balance flying capacitor voltages by charging or discharging flying capacitors. The redundant states are employed by obtaining a load current of the flying capacitor multilevel converter. If a load current value is lower than a threshold value then a capacitor current of a phase terminal capacitor is utilized to determine redundant states else a load current direction is utilized to determine the redundant states.
Public/Granted literature
- US20140293667A1 VOLTAGE BALANCING SYSTEM AND METHOD FOR MULTILEVEL CONVERTERS Public/Granted day:2014-10-02
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