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Edward Lowton
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Robot improves motor inspection
13 December 2015
A miniature robot fitted with five cameras is being used to crawl in the air gap between the stator and rotor of large motors or generators to visually inspect their status, thereby reducing downtime, inspection costs and the need to withdraw the rotor.
Called the ABB InSight, the 8.5 mm high robotic inspection crawler is tethered to a control cabinet that features two large and three small monitors. A joystick and speed controller is used to navigate the crawler – which uses a magnetic roller mechanism – around the air gap and to adjust four of the five cameras.
On board LEDs illuminate the journey, while a microprocessor, accelerometers, RS485 communication and video multiplexing provides a video feed of the stator and rotor core, winding, wedges, stator teeth, air ducts, rotor support blocks and parts of the end windings.
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