AN ELECTRIC ROTATING MACHINE

Patentradars sammanfattning

TRATON AB's invention integrates the shaft-grounding function directly into the rotor shaft's inner section, which co-rotates with the shell while forming an annular cooling-fluid compartment between them. The inner section acts as the first (rotating) contact device of a discharge arrangement, making direct or indirect electrical contact with a stationary second contact device to bleed off induced voltages and bearing currents. A recess in the inner section's end portion accommodates the second contact device, which includes a spring-biased contact member and an elongated grounding rod aligned with the axis of rotation, supported by small bearings attached to the inner section. This design eliminates the need for a separate rotating contact ring, reducing bulk and improving robustness against vibration and misalignment.

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