Yarn feeding device

Details Yarn feeding device Yarn feeding device

2006-08-01

2006-08-01

Matecki, Kathy (Department: 3654)

Winding, tensioning, or guiding

Unidirectional winding and unwinding

Threading

C242S365300, C242S365600

Reexamination Certificate

active

07083134

ABSTRACT:
The invention relates to a yarn feeding device (F) for weaving or knitting machines whose winding element (W) is driven by an electric motor (M) controlled by an electronic speed control device (CU). According to the invention, the electric motor (M) is a synchronous motor, in particular, a permanent magnet (PM) motor with the speed control device (CU) provided for effecting a permanent vector control with the stator being sinusoidally acted upon. Continuously determined information pertaining to the relevant rotational position of the rotor (R) of the motor (M) is used in the speed control device (CU), which serves to perform permanent vector control, in order to adjust at least one predetermined rotational position (X1, X2) of the winding element (W).

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U.S. Appl. No. 10/468,632, filed Feb. 13, 2002 as PCT Int'l. Application No. PCT/EP02/01512, Inventors: Egon Johansson et al.; including written description (7 pages) , claims (3 pages) and drawings (2 sheets).

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