US 7,321,211 B2 | ||
Power variation control system for cyclic loads | ||
Ronald G. Peterson, Racine, Wis. (US) | ||
Assigned to Unico, Inc., Franksville, Wis. (US) | ||
Filed on Apr. 28, 2006, as Appl. No. 11/380,861. | ||
Prior Publication US 2007/0252546 A1, Nov. 01, 2007 | ||
Int. Cl. H02P 23/04 (2006.01) |
U.S. Cl. 318—432 [318/268; 318/448; 166/104; 417/45] | 34 Claims |
1. A method for reducing the power demand variations of a motor for driving a mechanical system having a cyclic load and a
rotating inertia, the method comprising the steps of:
determining a signal representing a velocity output of the motor;
generating a torque limit signal by multiplying a signal representing a desired power level of the mechanical system by a
torque scaling factor divided by the signal representing the velocity output of the motor; and
causing the motor to operate at the torque represented by the torque limit signal.
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