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Flywheel design for air compressor

Flywheel design for air compressor

Flywheel design for air compressor

(OP)
I am designing a 2 cylinder reciprocating air compressor that uses around 13 HP.   The air compressor is currently connected to a 15 HP motor.  I want to add a flywheel to my design to limit the running torque.  The motor is running at 1725 RPM.  Can anyone guide me the proper method to perform the calculations?   

RE: Flywheel design for air compressor

If the load will be DOL-started, then one consideration for maximum inertia is preventing the motor from damaging itself (or tripping) during starting.

Per NEMA MG-1 2009, Table 12-7 for 15HP, 1800RPM Design A or B motor, the maximum Load WK^2 (exclusive of motor WK^2) is 75 lb^ft^2

If there is belt or gears involved, the inertias need to be adjusted to motor speed.
 

=====================================
(2B)+(2B)'  ?

RE: Flywheel design for air compressor

75 lb^ft^2
 should have been
75 lb*ft^2
   

=====================================
(2B)+(2B)'  ?

RE: Flywheel design for air compressor

(OP)
So pretty much I need to design my flywheel to be less than 75 lb*ft^2?

RE: Flywheel design for air compressor

Flywheel plus compressor inertia less than 75 lb-ft^2, assuming no belts present, based on NEMA requirements.

=====================================
(2B)+(2B)'  ?

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