Designer69
Senior Member
I'd like to learn more about motor torque vs. pump torque. anyone know any good publications to read?
+1 on Eric's response to what you probably meant ... but assuming direct coupled, pump torque IS motor torque.I'd like to learn more about motor torque vs. pump torque. anyone know any good publications to read?
Minor edits to a great explanation.What George was saying is that the torque coming out of the motor must at least equal the torque absorbed by the pump, at the operating point.
The over-all torque characteristic of the motor must be different than that of the pump, otherwise the system could never accelerate up to the operating point. At start the motor must produce more torque than the pump consumes.
If you overlap a graph of the motor torque output characteristic and the pump torque requirement characteristic, the operating point will be at the intersection of the two. If there are multiple intersections, then there are multiple possible operating points.
-Jon
After selecting the pump its torque speed characteristics should be sent to a motor manufacturer or supplier to quote for a suitable motor for that particular application.