Control for dual stepper motors

Details Control for dual stepper motors Control for dual stepper motors

2007-11-13

2007-11-13

Wilson, Gregory (Department: 3749)

Ventilation

Having inlet airway

Including specific air distributor

C454S202000, C454S314000

Reexamination Certificate

active

10909884

ABSTRACT:
In an air handling unit for discharging a flow of air into the surrounding ambient, having a series of horizontal louvers and a series of vertical louvers mounted in the discharge flow. A first multi-phase stepper motor is arranged to step the horizontal louvers to deflect the air flow in a vertical direction and a second multi-phase stepper motor is arranged to step vertical louvers to deflect the flow in a transverse direction. A controller is programmed to alternately apply power from a single power source to each of the motors during each phase to step each motor in equal increments during each phase.

REFERENCES:
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patent: 5743103 (1998-04-01), Taniguchi et al.
patent: 5775989 (1998-07-01), Choi
patent: 6012297 (2000-01-01), Ichishi et al.
patent: 6170274 (2001-01-01), Ichishi et al.
patent: 6171185 (2001-01-01), Jeong
patent: 6347987 (2002-02-01), Ichishi et al.
patent: 2003/0072675 (2003-04-01), Takeda et al.
KR 9306064 B, Abstract, “Louver control System . . . ”, Jul. 3, 1993 image unavailable.

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