General Electric Company

General Electric Technology Gmbh

Andrew Lumley

Massimiliano Visintin

Sanjiv Kumar Mishra

Reinhard Fischer

Eric Seuret

Dominik Loosli

A method and an arrangement is provided for measuring the tightness of a core composed of laminated sheets used in an electric machine. The method for measuring the tightness of a core of an electric machine composed of sheets, includes supplying a sound wave to the core, measuring the speed of the sound wave in the core, and deducing the tightness of the core from the measured data. The arrangement to measure the tightness of a core of an electric machine composed of sheets, includes a hammering system to pound at the core for generating a sound wave in the core, at least two accelerometers arranged at the core at an axial distance for measuring the speed of the sound wave, and a computer to deduce the tightness of the core from the measured data.

Method and arrangement for measuring the tightness of a core in an electric machine

An inspection apparatus, including an extendable structure, an inspection probe, a drive, a sensor, and a processor. The extendable structure includes an end fixed to the inspection probe and insertable into a gap defined between a first surface and a second surface. The extendable structure is configured to maintain physical contact with the first surface as the end transitions across the first surface. The drive is configured to position the inspection probe. The current sensor is coupled to the drive and configured to measure a drive load over a period of time the inspection probe transitions across the first surface. The processor is coupled to the sensor and is configured to receive a signal associated with the drive load corresponding to movement of the inspection probe, and determine an operating condition of the extendable structure based on the drive load signal.

Inspection probe

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Stafford, United Kingdom

Andrew Lumley