Since 1967

Unico, Inc.
3725 Nicholson Rd.
P. O. Box 0505
Franksville, WI
53126-0505
262.886.5678
262.504.7396 fax
oilgas@unicous.com
unicous.com

Copyright © 2010
Unico, Inc.
All rights reserved.

All trade designations
are provided without
reference to the rights
of their respective
owners.

Harmonics Calculator
Simple Harmonic Analysis for Various Drive Types

	Supply Short-Circuit Ratio			Supply Effective Impedance	0.75%
	Drive Demand Ratio	%		Total Effective Impedance	3.75%
	Drive Reactor Impedance	%

	Harmonic	6-Pulse	12-Pulse	18-Pulse	24-Pulse	Supply	IEEE-519
	5	18.73%	—	—	—	14.05%	12.00%
	7	12.68%	—	—	—	9.51%	12.00%
	11	6.85%	6.85%	—	—	5.14%	5.50%
	13	5.18%	5.18%	—	—	3.88%	5.50%
	17	2.98%	—	2.98%	—	2.23%	5.00%
	19	2.24%	—	2.24%	—	1.68%	5.00%
	23	1.29%	1.29%	—	1.29%	0.96%	2.00%
	25	1.01%	1.01%	—	1.01%	0.76%	2.00%
	29	0.75%	—	—	—	0.56%	2.00%
	31	0.69%	—	—	—	0.52%	2.00%
	35	0.61%	0.61%	0.61%	—	0.45%	1.00%
	37	0.56%	0.56%	0.56%	—	0.42%	1.00%
	41	0.45%	—	—	—	0.34%	1.00%
	43	0.39%	—	—	—	0.29%	1.00%
	47	0.30%	0.30%	—	0.30%	0.23%	1.00%
	49	0.27%	0.27%	—	0.27%	0.20%	1.00%
	...97	0.07%	0.07%	—	0.07%	0.05%	1.00%
	Drive	24.59%	8.80%	3.84%	1.70%	—	—
	Supply	18.44%	6.60%	2.88%	1.27%	—	15.00%
	Excess	-3.44%	8.40%	12.12%	13.73%	—	—