Motor control for box printing equipment

Details Motor control for box printing equipment Motor control for box printing equipment

1998-01-09

1999-06-22

Ip, Paul

Electricity: motive power systems

Induction motor systems

Primary circuit control

318370, 318758, 318809, H02P 320, H02P 540

Patent

active

059145838

ABSTRACT:
A motor control system for controlling the operating speed and direction of a three-phase induction motor. The invention particularly finds use for bringing a rotary printing cylinder precisely into register for processing products in sheet form, such as for printing sheets of corrugated cardboard in a machine for printing corrugated boxes. A three phase induction motor is single phase powered by an AC drive through a first and a second electrical conductor. Direction switching signals and time delay speed switching signals are applied to the appropriate terminals of the AC drive by the second and a third electrical conductor. This allows motor powering and control using only three conductors, such from as the slip rings on industry standard corrugated box printing equipment.

REFERENCES:
patent: 3594625 (1971-07-01), Richardson
patent: 4095511 (1978-06-01), Woolston
patent: 4411194 (1983-10-01), Davidson, Jr.
patent: 4712054 (1987-12-01), Boldt
patent: 5133465 (1992-07-01), Kalan
patent: 5319292 (1994-06-01), Backstrand
patent: 5342461 (1994-08-01), Murphy
patent: 5350076 (1994-09-01), Kalan
patent: 5828195 (1998-10-01), Zalesski
patent: 5843252 (1998-12-01), Murphy

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