Drive for a yarn feeder for a textile machine

Details Drive for a yarn feeder for a textile machine Drive for a yarn feeder for a textile machine

1977-10-26

1979-01-02

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

66132R, 139452, B65H 5120

Patent

active

041323688

ABSTRACT:
The drive motor for the yarn storage device is controlled by a circuit arrangement which converts a direct current into a variable-frequency three-phase alternating current. The circuit arrangement includes an integrator to produce a trapezoidal control voltage as well as an oscillator, digital counting circuit, three inverter stages and three amplifiers which emit sinusoidal phase currents to the windings of the drive motor.
An electromagnetic brake is also used to brake the drive motor.

REFERENCES:
patent: 3225446 (1965-12-01), Sarfati et al.
patent: 3670976 (1972-06-01), Vischiani
patent: 3759300 (1973-09-01), Pfarrwaller
patent: 3761031 (1973-09-01), Pfarrwaller
patent: 3791599 (1974-02-01), Jacobsson
patent: 3798929 (1974-03-01), Balgalvis
patent: 3820731 (1974-06-01), Rosen
patent: 3924818 (1975-12-01), Pfeifle

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