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Hello I mentioned 'In case the pinion is suddenly locked'. So in fact it is a braking phenomenon - not a problem. Reading the posts by other contributors (in particular drawoh & tbuelna), I felt all understood my question. Nonetheless, sorry if there was any confusion. Thanks!

When I did the calculation as above, the result is almost matching practical data..... Desertfox - Δω = ω2 - ω1; here ω2 = 0, since motor comes to halt upon sudden brake ω1 = angular velocity just before braking (there will be 2 different speeds - one of the pinion&drive...

Time period has to be measured from the vehicle using a digital recorder. Rest is just calculation

Thanks everyone. I got the solution. this phenomenon can be studied by CONSERVATION OF ANGULAR MOMENTUM. ΔL/Δt = T where, L = ΣIω ... Angular Momentum of SoP T = τJ/R Δt = impact time From this, we get the Shear Stress τ.

Thanks everyone for your feedback. The reality (as observed practically) is that the shaft shears at the smallest diameter. In all cases of failure, the pinion has been in tact. only the shaft shears off near a neck region. I tried to use the formula : STRAIN ENERGY = KINETIC ENERGY ; to find...

I have an electric motor with a pinion at the drive end. In case the pinion is suddenly locked, that is, an impact load (to halt) is applied, how will I calculate the torsional stresses on the shaft sections (shaft is stepped)?

Thanks to everyone for their valuable suggestions. I will look in this direction and let you all know what the results are in a few weeks time. CHEERS!

@ dgallup Yup, I agree that annealing gives the desired results. However, it costs. While using the SAE1006, I am additionally trying to cut this additional annealing cost. Any suggestions (like partial magnetization during processing, etc)??

@ MagBen @ EdStainless Thanks for the inputs. In fact we will be plotting a B-H curve soon. However, are there any specific 'boundary conditions' to be defined for conducting the measurement? Last time I interacted with a guy who does B-H curve plotting he bombarded me with questions pertaining...

For a DC application like this, magnetic properties imply: 1. Saturation point 2. B-H product 3. Permeability Apart from these, what else must I look at?

Hello Recently we have changed the supplier for the rotor claw poles of an automotive generator. earlier MAT was equivalent of SAE 1006. new MAT is equivalent of SAE 1008. Current output is low with the new MAT. Kept constant: All Design parameters Changes: A slight process change by the new...