Peripheral device power activation circuit and method therefor

Details Peripheral device power activation circuit and method therefor Peripheral device power activation circuit and method therefor

H - Electricity

01

H

348/26, 323/4

H01H 47/00 (2006.01)

Patent

CA 1304125

ABSTRACT OF THE DISCLOSURE A first embodiment of the present invention has toroidal current transformer having its outputs connected across full-wave bridge rectifier. The induced, rectified current produced by full-wave rectifier is converted to a voltage by a load resistor. This voltage is compared to a reference signal, the magnitude of which corresponds to a quiescent current level, by a comparator. When the load resistor voltage exceeds that of the reference voltage, a current surge is detected. The output of the comparator is directed to a retriggerable monostable multivibrator which produces an activation pulse of a selectable and known duration. The activation pulse is directed to an electromagnetic or solid-state relay which activates peripheral device by connacting it to its power supply. The second embodiment of the present invention has a line sensor electro- magnetically coupled to a power supply line. The output of the sensor is integrated by an integrator. The integrated signal is then digitized by a digitizer and input into a selector. A crossover detector and a line voltage sensor are operably connected to a power supply line to monitor the crossover points and voltage level of the supply. The monitored voltage is digitized by a digitizer and input into a selector. The selector alternatively supplies a microcontroller with the digitized line current and voltage level values. The microcontroller compares the relative values of the line current and voltage level to detect current surges in a power supply line due to increased activity of the parent device. The microcontroller then activates a solid-state relay, thereby activating a peripheral device.

613612

Affiliated with

Also associated with

Rating

Peripheral device power activation circuit and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Peripheral device power activation circuit and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Peripheral device power activation circuit and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1189241