Applying the Internet of Things (IOT) to Induction Motor Monitoring
Induction motors are found in all sorts of industries and applications, both on land and offshore.
Smaller Induction Motors (roughly drawing up to 10 Amps Full Load Current) most commonly use Direct Online Starting (D.O.L) methods.
Larger motors typically use starting methods such as Star-Delta starting, which keeps the starting current (surge / inrush) down.
The Internet of Things offers 24/7 monitoring of systems, which can intelligently react based on the input data provided by the networked sensors.
The main parameters of induction motors that could be measured are:-
Voltage (individual phase)
Current being drawn by motor.
Over current in individual phases, such as imbalances due to single phasing faults.
Phase Winding temperature based on measurement using thermistors.
Vibration Monitoring, indicating bearing failure.
Motor speed (inc comparison of actual to Synchronous field speed calculated speed).
(c) Craig Miles 2015. All rights reserved. www.craigmiles.co.uk @acraigmiles