Breakdown Torque
Breakdown Torque
(OP)
Is there a rule of thumb for the ratio of breakdown torque to full load running torque for NEMA B 3 phase motors? I've been told it is aroung 3.0 +/-.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Breakdown Torque
Of course, there is nothing to stop a manufacturer from designing a motor with more than the minimum breakdown torque.
RE: Breakdown Torque
I don't know if you could derive a rule of thumb that the ratio is 300% (breakdown to full-load torque). In general, the smaller motors have higher breakdown torque than the big ones.
RE: Breakdown Torque
RE: Breakdown Torque
http://www.textrolinc.com/formulas.html
for more info.