Motor monitoring system for a continuous miner
- Bureau of Mines, Pittsburgh, PA (United States)
The US 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.
- OSTI ID:
- 6210586
- Journal Information:
- Information Circular - United States, Bureau of Mines; (United States), Journal Name: Information Circular - United States, Bureau of Mines; (United States) Vol. 9306; ISSN XIMIAL; ISSN 0096-1914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
012030* -- Coal
Lignite
& Peat-- Underground Mining-- (1987-)
COAL MINING
COMPUTER GRAPHICS
COMPUTERIZED CONTROL SYSTEMS
CONTINUOUS MINERS
CONTROL SYSTEMS
CUTTER LOADERS
CUTTING MACHINES
ELECTRIC MOTORS
ELECTRICAL INSULATION
ENGINES
EQUIPMENT
FAILURES
HAULAGE EQUIPMENT
LOADERS
MATERIALS HANDLING EQUIPMENT
MINING
MINING EQUIPMENT
MONITORING
MOTORS
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS