Electricity: motive power systems – With particular motor-driven load device – Tension-maintaining type of motor-control system
Patent
1987-09-21
1988-05-10
Ro, Bentsu
Electricity: motive power systems
With particular motor-driven load device
Tension-maintaining type of motor-control system
318138, 318254, 242 7551, 360 73, B65H 5938, G11B 1546
Patent
active
047438118
ABSTRACT:
A reel to reel web transport apparatus includes an adaptive control which eliminates the necessity (1) for mechanical or vacuum web buffers, (2) for a capstan or tachometer to meter or control web velocity; and (3) for a tension transducer to control web tension. The web transport apparatus includes supply and takeup reels driven by brushless direct current (DC) motors. Hall device assemblies associated with the brushless DC motors provide Hall signals which are used during a learning mode to determine several unknown parameters for servo control of the web transport apparatus.
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Eastman Kodak Company
Noval William F.
Ro Bentsu
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