Invention Grant
- Patent Title: Methods of balancing reactive power in multi-level motor drives with active front ends
- Patent Title (中): 多级电机驱动与无功前端平衡无功功率的方法
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Application No.: US13596909Application Date: 2012-08-28
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Publication No.: US08804381B2Publication Date: 2014-08-12
- Inventor: John Channing Bousfield, III
- Applicant: John Channing Bousfield, III
- Applicant Address: US GA Alpharetta
- Assignee: Siemens Industry, Inc.
- Current Assignee: Siemens Industry, Inc.
- Current Assignee Address: US GA Alpharetta
- Main IPC: H02M5/42
- IPC: H02M5/42 ; G05F1/70

Abstract:
A method of balancing reactive power at a power delivery system is disclosed. The method may include operating a power delivery system that may have a plurality of power cells that are electrically connected to a first transformer comprising one or more primary windings and a plurality of secondary windings such that each cell is electrically connected to one of the secondary windings and a plurality of the secondary windings are phase-shifted with respect to the primary windings. The method may further include controlling the reactive current flow at each power cell by calculating, at a first controller, a reactive current flow adjustment for at least one power cell so that reactive current flow is balanced among each of the plurality of power cells. Each cell may include a plurality of switching devices.
Public/Granted literature
- US20140063869A1 METHODS OF BALANCING REACTIVE POWER IN MULTI-LEVEL MOTOR DRIVES WITH ACTIVE FRONT ENDS Public/Granted day:2014-03-06
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