Stepping motor with an electrical activation circuit and arrangement with a stepping motor
AssigneeAscom AG
InventorsGeorges Gerber, Olivier Gaeumann, Pierre-Yves Monneron
Life of this patent
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Abstract
A stepping motor with an electrical activation circuit for electrical control of its exciter windings, is made as a driving motor and also as a braking motor with an adjustable braking action. The predefinable braking action is achieved passively without any current feed into the exciter windings. For this purpose a stipulated impedance with an adjustable duty factor can be connected to each exciter winding. One such stepping motor that is controlled in its braking action is used in an arrangement in which a strip or filament material can be transported braked from a storage.
Claims14
A stepping motor with an electrical activation circuit for electrical control of its exciter windings, characterized in that in addition to controlling current flow through the exciter windings of the stepping motor to its drive with the activation circuit, passively without any feed of an external current through each exciter winding with the activation circuit, a stipulated impedance with a duty factor can be applied to each exciter winding and can be turned off in order to achieve a predefinable braking variation depending on the rpm of the unexcited motor.
Dependencies are inferred from the claim text.