Marposs has announced its NVH Gear Tester for identifying potential gear defects at the component level prior to gearbox assembly. The NVH gear tester, which works on the Single Flank testing principle of one master gear meshing with the component under inspection, is able to detect macro-geometry (nicks, runout, etc.) and micro-geometry (gear mesh excitation, ghost orders) defects that cause gear whine and noise phenomena. With electrification of the automotive industry, many hybrid (HEV) and full electric-vehicle (EV) drivetrains are facing a variety of challenges, such as increased NVH requirements in high-speed e-drives. And, although the number of gear wheels is significantly reduced in EVs due to the use of one or two speed reducers instead of the classic manual, automatic or twin-clutch gearboxes, these gear wheels are loaded with torque and rpm not previously found in high-volume production.
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