D-C. electric torquing system

Details D-C. electric torquing system D-C. electric torquing system

1978-02-03

1980-01-08

Dobeck, B.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318332, 318689, H02P 700

Patent

active

041829794

ABSTRACT:
An electric torquing device comprises a d-c. motor for producing an output torque that varies in proportion to variations in the armature current, a power source for supplying d-c. current to the armature to produce an output torque, and regulating means for maintaining the d-c. current at a relatively low level during the run-on stage of a torquing operation. Sensing means responsive to a preselected parameter of the torquing operation, such as the velocity of the motor output, produces a control signal when the tightening stage of the torquing operation begins. Control means responsive to the control signal from the sensing means adjusts the regulation of the d-c. current to maintain the current supply to the armature at a relatively high level during the tightening stage of the torquing operation.

REFERENCES:
patent: 3418549 (1968-12-01), Emerson et al.
patent: 3477007 (1969-11-01), Ducommun et al.
patent: 3783716 (1974-01-01), Saito
patent: 3818642 (1974-06-01), Seidel
patent: 3892146 (1975-07-01), Yasoshima
patent: 4035698 (1977-07-01), Soderberg
patent: 4066942 (1978-01-01), Bardwell et al.

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