A device for Pulse-Density-Modulation control of a motor

Japanese Patent JP6123027

B2

A drive mechanism (16A, 16B) configured to drive a thermally isolated actuator (30) between two positions. The drive mechanism includes a rotary actuated motor (18) configured to rotatably drive a motor member (20), and a drive member (22) coupled to the motor member and having a drive arm (24, 42) configured to responsively move from a first position to a second position upon rotation of the motor member. An actuator (30) is responsive to movement of the drive arm (24) moved from the first position to the second position. A drive circuit (60) is configured to generate a pulse width modulated (PWM) drive signal (70) configured to controllably drive the motor, the PWM drive signal having a first duty cycle (Phase 1) configured to advance the drive arm from the first position, and having a second duty cycle (Phase 2) different than the first duty cycle as the drive arm approaches the second position. The drive signal may be removed (Phase3) before the drive arm (42) engages a hard stop (54). The drive mechanism may comprise at least one sensor (40) configured to determine a position of the drive arm (42) proximate the first position and proximate the second position. The actuator is thermally isolated from the drive arm (42) in both the first position and the second position.

Yoshida, Amy Em.
Kostrazewa, Thomas Jay.
Hughes, Eric Tee.
Brest, Michael El.
Griffin, Eric Jay.
Hirschberg, Jerry

JP2016519632A

April 26, 2017

June 11, 2014

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RAYTHEON COMPANY

H02K33/00; H02P8/20; H02P27/08; G01R31/72

JP5150288A
JP2003075886A
JP2006091136A
JP2002162666A
JP2027224A
JP6082874A
JP2002054903A

US4995700
US5402202

Tadashige Ito
Tadahiko Ito
Shinsuke Onuki

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