Air damper operating system of vehicle air conditioners

Details Air damper operating system of vehicle air conditioners Air damper operating system of vehicle air conditioners

1990-09-25

1991-10-08

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318116, H02P 100

Patent

active

050557505

ABSTRACT:
An air damper operating system for vehicle air conditioners with a plurality of ultrasonic motors. An oscillator circuit, phase shifter and feedback circuit control the frequency of an oscillator of a motor. A feedback signal transfer switch, position sensors and a time-division switching circuit operate the motors until they are rotated to predetermined positions.

REFERENCES:
patent: 4842387 (1989-06-01), Murakami et al.
patent: 4914336 (1990-04-01), Yamasaki
patent: 4915074 (1990-04-01), Arai
patent: 4936307 (1990-06-01), Saito et al.
patent: 4989030 (1991-01-01), Naka et al.
patent: 4991957 (1991-02-01), Sakamoto et al.

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