Electricity: motive power systems – Braking – Dynamic braking
Reexamination Certificate
2000-04-12
2002-04-16
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Braking
Dynamic braking
C318S380000, C318S696000, C318S685000
Reexamination Certificate
active
06373209
ABSTRACT:
BACKGROUND OF THE INVENTION
TECHNICAL DOMAIN
The invention relates to a stepping motor and an arrangement with a stepping motor.
SUMMARY OF THE INVENTION
The object of the invention is to devise a stepping motor with simple electrical control which has adjustable braking behavior and to use this stepping motor in an arrangement for winding and/or unwinding of strip or filament material.
The aforementioned object is achieved in that a stipulated resistance with a duty factor can be applied to each exciter winding and can be turned off in order to achieve a predetermined braking variation depending on the rpm of the motor. This process is done in addition to having a controllable current flow through the exciter windings of a stepping motor to its drive with an activation circuit. This is done passively without any feed of an external current through each exciter winding with the activation circuit.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following, examples of the stepping motor and its use are detailed with reference to the figures in the drawings.
FIG. 1
shows a schematic of an arrangement with sample use of the stepping motor, in accordance with the systems and methods of the invention;
FIG. 2
shows an activation circuit for a stepping motor which acts with a predefinable variation of the braking force, in accordance with the systems and methods of the invention;
FIG. 3
shows the variation of the braking force in known activation of stepping motors, in accordance with the systems and methods of the invention;
FIG. 4
shows the variation of the braking force in activation of the stepping motors, in accordance with the systems and methods of the invention; and
FIG. 5
shows one version of the arrangement which is shown in
FIG. 1
, in accordance with the systems and methods of the invention.
REFERENCES:
patent: 4486696 (1984-12-01), Matsushita et al.
patent: 5117171 (1992-05-01), Bonss
patent: 6002225 (1999-12-01), Gleim et al.
patent: 6100662 (2000-08-01), Hansen
patent: A1-3326358 (1984-01-01), None
patent: A1-4022637 (1992-01-01), None
patent: A1367693 (1990-05-01), None
patent: A2583724 (1994-02-01), None
Patent Abstract of Japan, vol. 96, No. 7, 08 067382, Mar. 12, 1996.
Gaeumann Olivier
Gerber Georges
Monneron Pierre-Yves
Ascom AG
Ro Bentsu
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