Invention Grant
- Patent Title: Wear-balanced electromagnetic motor control switching
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Application No.: US14832885Application Date: 2015-08-21
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Publication No.: US10141143B2Publication Date: 2018-11-27
- Inventor: Christopher H. Bock , Christopher J. Wieloch , James J. Kinsella , Stefan T. Dziekonski , James P. Miller
- Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
- Applicant Address: US OH Mayfield Heights
- Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee Address: US OH Mayfield Heights
- Agency: Fletcher Yoder, P.C.
- Main IPC: H01H47/22
- IPC: H01H47/22 ; H01H47/32 ; H01H50/00 ; H01H9/56 ; H02P1/32 ; H01H50/86 ; H02P25/18

Abstract:
One embodiment describes a method that includes in a first switching operation of an electrical power switching system including three separately controllable single pole, single current-carrying path switching devices that provide three-phase power to a load, and control circuitry coupled to the switching devices to control closing and opening of the current-carrying paths, commanding at least one of the switching devices to open or close in advance of at least one other of the switching devices based upon a current zero-crossing or a predicted current zero-crossing of input three-phase power; and in subsequent switching operations alternating which of the three switching devices is closed or opened in advance of another of the switching devices.
Public/Granted literature
- US20160133415A1 WEAR-BALANCED ELECTROMAGNETIC MOTOR CONTROL SWITCHING Public/Granted day:2016-05-12
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