Speed regulator by pulse width modulation for direct current motors
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United States of America Patent
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Dec 14, 2004
Grant Date -
N/A
app pub date -
Jan 11, 2002
filing date -
Apr 15, 1999
priority date (Note) -
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Abstract
Disclosed is an electronic pulse width modulation (PWM) regulator of a low frequency rectangular wave signal serving to control the speed of a direct current motor. The invention aims at simplifying the design of said regulator by eliminating the classical inductive element so that the motor continuously operates as a filter of the output signal provided by the switching component. The invention also aims at preventing noises caused by switching. To this end, subsonic switching frequencies of less than 50 Hz are used.
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