Brake module
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Sep 18, 2003
app pub date -
Jan 21, 2003
filing date -
Mar 23, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention relates to a braking module for an asynchronous motor, in particular that used in a circular saw. In order that the braking process can run its course as gently and noiselessly as possible, independently of the inertial moment of the element driven by the motor, according to the invention provision is made for switching means (1, 2, 3, S1-S5) for separating the stator windings (U, V, W) of the asynchronous motor from the operating-voltage supply (L1, L2, L3) and for applying a direct current voltage (G1, G2) to at least two stator windings (U, V) in order to brake the asynchronous motor, a measuring unit (9) for measuring a remanence voltage on at least one stator winding (W), and a control unit (12) for regulating a braking current, which, for the purpose of braking, flows through the stator windings affected by the direct current voltage, in dependence on the measured remanence voltage. In further developments, provision is made for the regulation of the braking current by means of a predetermined value table or in an adaptive manner.
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