there is no significant difference in the weights, as there are similar windings in both kinds, only the written-pole's configuration is much different. the nema frame sizes are the same. the biggest difference i can see is the price. the written-pole motor is significantly more expensive, (maybe 5 times as much as a standard motor), but the manufacturer promises the prices going down, as production problems are worked out and the market expands. they are available to the public now, up to 75 h.p., but are still considered in the "prototype" and "development" stages. next on the horizon, according to Precision Power, (the patent-holder), are 100, 125, and 150 h.p. motors.
btw, i am looking at becoming a midwestern distributor for this technology..... [Linked Image]

gramps