Rexroth Indramat Gmbh

Ingo Hahn

Christoph Mueller

A three-phase machine has a primary part having N grooves and m electrical phase windings; a secondary part having a number p of pole pairs (P-P), each comprised of two magnetic poles of different polarities; wherein the pole gap is essentially the same for all of the pole pairs (P-P) and results from an even distribution of all of the poles on the secondary part; and at least one pole pair (P-P), with no change to its pole gap, is shifted by a predetermined distance in relation to an equidistant distribution of all of the pole pairs.

Polyphase motor with optimised running characteristics

The invention relates to a method for adjusting the degree of engagement of a tool () disposed on the outer radius of at least one associated rotating roll () with a web of material () running past it. The aim of the invention is to improve the method so that the degree of engagement of the tool can be adjusted without loss of time and without producing any scraps. To this end, for adjusting the degree of engagement of the tool () with the web of material (), first several different degrees of engagement are electronically defined by means of different peripheral speeds of the tool () so as to be retrievable. Once an adjuster () is activated, the change to another defined degree of engagement takes place during operation precisely when the tool () engages with the web so that the new degree of engagement is carried out when the tool () engages with the web of material () for the next time.

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Lohr am Main, Germany

Ingo Hahn