Electrical transmission or interconnection systems – Plural supply circuits or sources – Connecting or disconnecting
Patent
1990-05-17
1992-07-28
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Connecting or disconnecting
363 17, 363 37, 363 89, 363126, H02M 7219, H02J 906
Patent
active
051343070
ABSTRACT:
A commercial alternating current power source is provided to a first frequency converting circuit (PC1) through a filter circuit (F) and a reactor (LAC). A high frequency switching power supply circuit (15) of the first frequency converting circuit is switched in response to the commercial alternating current power source to output high frequency power. The high frequency power is transferred to a second frequency converting circuit (PC2) through dielectric materials in capacitors (C1, C2) using electric field thereof as a transfer medium. In the second frequency converting circuit, a rectifying circuit (70) rectifies the high frequency power, so that a charging circuit 72) charges a back-up battery (BT) in response to a rectified output. An inverter 77 included in the second frequency converting circuit is switched to output alternating current power, in response to the output of the first frequency converting circuit when the power source is normal, and in response to the battery when the power source is interrupted, respectively. An isolation barrier 44 of the capacitors isolates the second frequency converting circuit from the first frequency converting circuit, whereby an isolation circuit can be made lighter and more compact.
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B. E. Hart, "Power Filter Configuration", IBM Technical Disclosure Bulletin, vol. 19, No. 7, Dec. 1976, pp. 2596-2597.
Le D.
Pellinen A. D.
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