Invention Grant
- Patent Title: Variable frequency drive and methods for filter capacitor fault detection
- Patent Title (中): 变频器和滤波电容故障检测方法
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Application No.: US12789853Application Date: 2010-05-28
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Publication No.: US08259426B2Publication Date: 2012-09-04
- Inventor: Yuan Xiao , Navid Zargari , Manish Pande , Vijay Khatri
- Applicant: Yuan Xiao , Navid Zargari , Manish Pande , Vijay Khatri
- 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: Fay Sharpe LLP
- Agent Alexander R. Kuszewski; John M. Miller
- Main IPC: H02H3/00
- IPC: H02H3/00
Abstract:
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node current and/or voltages and detecting changes in the fundamental frequency component of the measured neutral condition at the fundamental frequency of the input power and/or based on input current unbalance.
Public/Granted literature
- US20110292696A1 VARIABLE FREQUENCY DRIVE AND METHODS FOR FILTER CAPACITOR FAULT DETECTION Public/Granted day:2011-12-01
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