Safety control device and process with analog power output

Details Safety control device and process with analog power output Safety control device and process with analog power output

1994-05-05

1996-04-23

Wong, Peter S.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 71, 363 58, 363 98, H02M 744

Patent

active

055109713

ABSTRACT:
The safety control device with digital input and analog output, is intended to deliver a mean output power above a specified threshold when two binary input sequences which are complementary or in phase opposition are applied to the input and an output power appreciably below the threshold in all other cases. It comprises a primary voltage source (18) supplying a cascade of several modules (16.sub.1 , . . . , 16.sub.k) each having an AC converter bridge and a rectifier, each branch of the AC converter bridge being controlled by one of the sequences.

REFERENCES:
patent: 3867643 (1975-02-01), Baker et al.
patent: 4052657 (1977-10-01), Kleiner et al.
patent: 4150425 (1979-04-01), Nagano et al.
patent: 4695933 (1987-09-01), Nguyen et al.
patent: 4853832 (1989-08-01), Stuart
patent: 4873606 (1989-10-01), Pannier
patent: 4956762 (1990-09-01), Loveness et al.

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