Apparatus and method for controlling the rotation speed of electric motors
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United States of America Patent
Stats
-
Dec 31, 1996
Grant Date -
N/A
app pub date -
Jun 12, 1991
filing date -
Jun 22, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The device for controlling the rotation speed of electric motors comprises an adjustable frequency generator (2) generating an output signal (s.sub.1) having a frequency which can be adjusted in relation to the desired speed (v.sub.d), a pulse generator (3) having a pre-determined period controlled by the adjustable frequency generator in such a way as to generate a control signal (s.sub.2) comprising a series of pulses at the adjustable frequency set by the frequency generator (2). The control signal (s.sub.2) is provided to a control unit (5) for the motor (6) whose rotation speed is to be controlled. The control unit thus provides a supply to the motor (6) corresponding to the control signal pulses. FIG. 1.
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