intelligent rotary pulser for generating a mud pulse in a mwd application in the rotary pulser a control circuit activates a brushless motor that rotates a windowed restrictor relative to a fixed housing to act as a shutter and window respectively opening of the windowed restrictor allows generally unrestricted mud flow closing of the windowed restrictor generally restricts mud flow the windowed restrictor is powered both in opening and closing operations by the motor application_number US 47941206 A description the present invention relates to an apparatus and method for actuating a mud pulser telemetry system used during well drilling or well logging operations the present apparatus allows a pulser valve to be powered both in opening e g to allow generally unrestricted flow and in closing e g to generally restrict flow and does not rely on a solenoid system the powered opening and closing of a windowed restrictor results in various functional and economic advantages including the ability to clear debris from the restricted portion of the mud flowpath and faster data rates due to elimination of inherent operating delays in the solenoid systems of previous tools with the end result of providing a pulser driver which consumes a minimal amount of power e g dc or ac electricity while providing more force with which to drive the windowed restrictor in each direction therefore the pulser remains functional at a comprehensive range of downhole drilling conditions furthermore in the embodiment shown in the figures the.