A Toshiba motor with AEGIS® installed at
TECHNO FRONTIER 2017.
Toshiba Electric Motors
Realizing that VFDs can destroy motor bearings through stray electrical currents, Toshiba offers AEGIS® Shaft Grounding Rings as a factory modification. AEGIS® Rings give stray current a non-destructive path to ground, protecting motor bearings from electrical damage.
Toshiba highlighted this new mod at the TECHNO FRONTIER 2017 expo, where they exhibited motors with AEGIS® installed. The AEGIS® shaft grounding option can be found in their 2017 Japanese catalog (translations are in progress). For excerpts from the catalog, see below.
Toshiba Industrial Products & Systems Corporation manufactures electric motors of up to IEC frame size 225. Larger motors are made by Toshiba's sister company, TMEIC.