Electric actuator for automotive air conditioning systems

Details Electric actuator for automotive air conditioning systems Electric actuator for automotive air conditioning systems

1987-07-31

1989-04-04

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318672, 318434, G05B 1302

Patent

active

048189243

ABSTRACT:
An electric actuator apparatus particularly suitable for use as part of an automotive air conditioning system. The apparatus uses a direct current motor to drive a final output element in accordance with an input voltage signal. The apparatus is inherently protected against stalled conditions and no limit switches are required. The apparatus is self-adapting to different physical environments which define the range of travel of the final output element. The apparatus may be operated as a two-position actuator or, with the addition of a feedback signal corresponding to the postion of the final output element, may be operated as an infinite position or multi-position actuator.

REFERENCES:
patent: 4078198 (1978-03-01), Murakoshi et al.
patent: 4388571 (1983-06-01), Tada et al.
patent: 4394605 (1983-07-01), Terazawa
patent: 4481452 (1984-11-01), Kitano et al.
patent: 4514666 (1985-04-01), Suzuki
patent: 4549125 (1985-10-01), Sonobe
patent: 4591773 (1986-05-01), Numata
patent: 4712053 (1987-12-01), Numata

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