Regulated Current Pulse Throttle

Published:2013/6/25 22:01:00 Author:muriel | Keyword: Regulated Current , Pulse Throttle | From:SeekIC

The next throttle is more than a little different, it's very different but in its own unique way it works just fine. It is however posted here for interest sake only and should not be viewed as a major discovery or some sort of magic trick. The design uses the variable pulse width oscillator that is the at the heart of the Variable Pulse Type Throttle as shown above. The oscillator in this circuit however switches a current regulator constructed from an LM317 voltage regulator. Rather than regulating the output voltage this throttle instead produces variable width pulses of a fixed current value, for example 200 or 400mA. The voltage can rise to a level that is determined largely by the B+ input voltage and the drop across the LM317 but the motor can only receive the maximum current that the LM317 will pass. This current value is determined by the value of R1.



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