Electricity: power supply or regulation systems – External or operator controlled – Zero switching
Patent
1980-04-18
1982-03-09
Beha, Jr., William H.
Electricity: power supply or regulation systems
External or operator controlled
Zero switching
307584, G05F 500
Patent
active
043191827
ABSTRACT:
Electronic switching circuit is provided for controlling transfer of electrical power from an alternating polarity electrical power supply to a load means through use of a field-effect transistor device as the controlling element. A circuit arrangement is provided for switching into the "on" condition primary power control field-effect transistor device only when the voltage thereacross is at a relatively low value and for switching into the "off" condition this device in a gradual manner, relatively slowly reducing currents flowing therethrough. A circuit arrangement for a command source directing operation of the primary power transfer control field-effect transistor device provides command source isolation.
REFERENCES:
patent: 4256977 (1981-03-01), Henrickson et al.
patent: 4256978 (1981-03-01), Pinckaers
patent: 4256979 (1981-03-01), Henrickson et al.
patent: 4258276 (1981-03-01), Beling
Hartranft Marc D.
Hendrickson Thomas E.
Beha Jr. William H.
Honeywell Inc.
Neils Theodore F.
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