Electrical transmission or interconnection systems – Plural supply circuits or sources – Load current control
Patent
1999-08-04
2000-12-12
Jackson, Stephen W.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Load current control
323237, H02J 110, H02J 338
Patent
active
061603201
ABSTRACT:
A method of controlling the load in an electric circuit by means of detecting the time state of same frequency of alternating current sine wave and alternating current square wave, which includes the step of picking up a half cycle wave signal, then attenuating the picked up half cycle wave signal and shaping the signal into a pulse wave signal, the step of chopping the picked up half cycle wave signal and shaping the signal into a square wave signal and then delayed the square wave signal, the step of comparing the rising edge of the square wave signal with the descending edge of the pulse signal so as to obtain a time difference, and the step of controlling the load of the electric circuit by means of a first control mode if the voltage level of the time difference thus obtained is at low potential, or by means of a second control mode if the voltage level of the time difference thus obtained is at high potential.
REFERENCES:
patent: 2806963 (1957-09-01), Woll
patent: 4100426 (1978-07-01), Baranowski et al.
patent: 5994883 (1999-11-01), Liu
Henry Andre
Jackson Stephen W.
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