Invention Grant
- Patent Title: Motor protection using accurate slip calculations
- Patent Title (中): 电机保护采用精确滑差计算
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Application No.: US12208272Application Date: 2008-09-10
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Publication No.: US07675720B1Publication Date: 2010-03-09
- Inventor: Stanley E. Zocholl , Subhash C. Patel
- Applicant: Stanley E. Zocholl , Subhash C. Patel
- Applicant Address: US WA Pullman
- Assignee: Schweitzer Engineering Laboratories, Inc.
- Current Assignee: Schweitzer Engineering Laboratories, Inc.
- Current Assignee Address: US WA Pullman
- Agent Richard M. Edge
- Main IPC: H02H7/08
- IPC: H02H7/08
Abstract:
An accurate slip calculation for providing monitoring and protection to an electric motor. The slip calculation is made using a minimum value of stator resistance as the initial stator resistance, where the minimum value of stator resistance is the minimum value of stator resistance calculated during an initiation period of the motor. The initiation period may be a predetermined time period or a predetermined number of cycles during the motor startup. The initiation period may start after a predetermined settling time or after a predetermined condition is met.
Public/Granted literature
- US20100060227A1 MOTOR PROTECTION USING ACCURATE SLIP CALCULATIONS Public/Granted day:2010-03-11
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