Clamp actuated by induction motor

Details Clamp actuated by induction motor Clamp actuated by induction motor

1986-10-15

1989-03-14

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318592, A02P 540

Patent

active

048127310

ABSTRACT:
A workpiece clamp actuator system which includes a clamping mechanism and an induction motor having an output coupled to the clamping mechanism for moving the mechanism between an unclamped position in abutment with a stop and a clamped position in abutment with a workpiece. A motor controller selectively feeds energy from first and second power supplies to the induction motor, the first power supply having an output voltage and frequency selected to obtain rapid initial motion at the clamp, and the second power supply having an output frequency equal to the slip frequency of the motor at rated torque and an output voltage selected to provide full load current, and thus maximum torque, at both the clamped and unclamped positions.

REFERENCES:
patent: 3710218 (1973-01-01), Roundy et al.
patent: 3962614 (1974-10-01), Rettig
patent: 4311951 (1982-01-01), Walker et al.
patent: 4376471 (1983-03-01), Uchino et al.
patent: 4459533 (1984-07-01), Ehret et al.
patent: 4503371 (1985-03-01), Sugita
patent: 4524310 (1985-06-01), Nagase et al.
patent: 4559485 (1985-12-01), Whited
patent: 4571499 (1986-02-01), Wein
patent: 4665323 (1987-05-01), Russell et al.

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