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Mining Publication: Motor Monitoring System for a Continuous Miner
Keywords: Electrical insulation Equipment monitoring Motors
Original creation date: January 1992
Authors: JR Thalimer, JJ McClelland, GT Homce
Information Circular - January 1992
Download PDF Document (2.31 MB)
NIOSHTIC2 Number: 10011188
U.S. Department of the Interior, Bureau of Mines, Information Circular 9306, 1992:1-12
The U.S. Bureau of Mines has investigated the early detection of insulation failure in squirrel cage induction motors for the past 4 years. Research was done using a sophisticated empirical data- modeling technique based on values calculated from a motor's voltage and current phasors. This technique produces two polynomial equations that calculate the insulation leakage current and power. These models were implemented in a prototype system that monitors six motors on a continuous miner for insulation leakage. These insulation leakage values are used to anticipate insulation failure. The system consists of a motor data system for each motor on the machine and a control computer located away from the miner. Each motor data system consists of an analog interface to the motor's voltages and currents, a single-board computer that reads digitized data and calculates voltage and current phasors, and a bus node that interfaces the single-board computer with the rest of the system by way of a serial bus system. Using this bus system, the control computer requests and receives phasor data from the motor data systems. From these data the control computer calculates and displays two deterioration values for each motor, for leakage current and power, using Bureau-developed models. These values are stored in a data base from which the user can display graphs of each motor's deterioration values over time.
Image of publication Motor Monitoring System for a Continuous MinerInformation Circular - January 1992
Download PDF Document (2.31 MB)
NIOSHTIC2 Number: 10011188
U.S. Department of the Interior, Bureau of Mines, Information Circular 9306, 1992:1-12
See Also
Condition-Based Maintenance of Electrical Machines
Derating Factors for Round and Flat Mine Trailing Cables
Distinguishing Motor Starts from Short Circuits through Phase-Angle Measurements
Early Detection of Insulation Failure in Electric Motors
Experimental Investigation of On-Line Methods for Incipient Fault Detection
A General Design and Implementation Procedure for Sensor-Based Electrical Diagnostic Systems for Mining Machinery
A GPS Based System for Minimizing Jolts to Heavy Equipment Operators
A Passive Means to Detect Hot Trolley Insulators
Sound Restoration Hearing Protection: Genesis of a Standard Test Method
Technology News 474 - A Passive Means to Detect Hot Trolley Insulators
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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