AC power supplying unit with self monitoring of AC out and detec

Details AC power supplying unit with self monitoring of AC out and detec AC power supplying unit with self monitoring of AC out and detec

1994-03-15

1995-05-16

Dougherty, Thomas M.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363132, 361 45, H02M 7525

Patent

active

054166926

ABSTRACT:
An invertor-controlled power unit includes an invertor circuit which performs switching control of direct current output from a direct current power source circuit in response to a driving signal. A bridge balanced circuit is connected to a pair of output lines extending from an output circuit of the power unit. The bridge balanced circuit has at least two balanced points and comprises a plurality of impedance elements connected to the pair of output lines. One of the balanced points is grounded. A potential difference between the one of the balanced points and another of same is detected, and a detection signal indicative of the potential difference is produced. When the detection signal falls outside a predetermined range, i.e. it is determined that a leak occurs, a stoppage instruction signal is produced to stop the supply of the driving signal to the invertor circuit.

REFERENCES:
patent: 2083920 (1937-06-01), Powell
patent: 3066284 (1962-11-01), McKinley
patent: 3609281 (1971-09-01), Kauffman
patent: 3699392 (1972-10-01), Lee et al.
patent: 4172982 (1979-10-01), Kompelien
patent: 4238784 (1980-12-01), Keen et al.
patent: 4403267 (1983-09-01), Verhoff et al.
patent: 4872100 (1989-10-01), Diaz
patent: 5019935 (1991-05-01), Nakamura
patent: 5166870 (1992-11-01), Shimizu et al.
patent: 5309345 (1994-05-01), Nakamura et al.

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