Apparatus for tension control of a flexible material during wind

Details Apparatus for tension control of a flexible material during wind Apparatus for tension control of a flexible material during wind

1986-12-02

1988-12-06

Ro, Bentsu

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

242 7551, B65H 5938

Patent

active

047898135

ABSTRACT:
Apparatus for controlling the tension of travelling filamentary material such as that being unwound from a drum or spool. It comprises a three phase induction motor for turning the drum or spool modified to have a high resistance rotor providing a torque speed characteristic of falling torque with increasing speed. The motor drive, and torque in either forward or reverse drive, is controlled by a pair of thyristor banks selectively triggered for forward and reverse drive modes by error signals representative of variation in tension from the required value.

REFERENCES:
patent: 2844773 (1958-07-01), Turner et al.
patent: 2981491 (1961-04-01), Eans
patent: 3348107 (1967-10-01), Hamby
patent: 4196375 (1980-04-01), Findeisen

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