Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1980-01-14
1982-09-14
Robinson, Thomas A.
Communications: electrical
Condition responsive indicating system
Specific condition
310 68R, 340639, 340645, 363 53, G08B 2100, H02H 7125
Patent
active
043498132
ABSTRACT:
Each arm forming a three-phase full wave rectifier bridge includes a semiconductor diode, a current transformer and a fuse. The current transformer is connected to a pulse extinction indicator circuit through a pulse transformer. When no current flows through the arm for a predetermined time or more, the pulse extinction detection circuit produces a DC signal indicating the blowing of the fuse. The rectifier bridge, the current transformers, the fuses and the pulse extinction detection circuit are all disposed on the rotor of a brushless synchronous machine.
REFERENCES:
patent: 3030531 (1962-04-01), Lessmann
patent: 3200392 (1965-08-01), Chumakov
patent: 3205423 (1965-09-01), Kanngiesser
patent: 3462754 (1969-08-01), Kelley
patent: 3512073 (1970-05-01), South
patent: 3670231 (1972-06-01), Maddick
patent: 3866196 (1975-02-01), Mann et al.
patent: 4074346 (1978-02-01), Riley
Ichinose Yosaburo
Ishibashi Naoto
Miyaji Junichi
Taniguti Ryosuke
Mitsubishi Denki & Kabushiki Kaisha
Myer Daniel
Robinson Thomas A.
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