Marconi Communications Gmbh

William I H Chen

Edwin Glenn Yancey

Leroy S Baker

A load management system for monitoring the output from a power supply and managing the load on said power supply, said load management system comprising a hysteresis circuit for signaling a load element to stop drawing current when an output voltage at said output falls below a first threshold and for signaling said load element to resume drawing current when said output voltage rises above a second threshold, said hysteresis circuit comprising a first state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than said first voltage threshold, a second state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than a second voltage threshold, and a state transition circuit having a first input coupled to the output of said first state sensing circuit and a second input coupled to the output of said second state sensing circuit, said state transition circuit having an output for setting a first control signal to a first state when said output voltage falls below said first threshold and resetting said first control signal to a second state when said output voltage rises above said second threshold.

Load management system for an electrical device

A power input protection circuit for an electrical device including a pass device having a full-conduction state, an off state, and a current regulation state, a control device coupled to the pass device for signaling the pass device to operate in one of the full-conduction, off or current regulation states, a high-voltage sensing circuit coupled to the control device for signaling the presence of an over-voltage condition to the control device, a high-current sensing circuit coupled to the control device for signaling the presence of an over-current condition to the control device, and an energy storage circuit coupled to the regulator and for supplying energy to the regulator when the pass device is in the off state is disclosed. In one embodiment the high-current sensing circuit comprises an input current sensor having a first input and a second input, a second voltage reference coupled to the first input, and a current measuring circuit coupled to the second input and the high-voltage sensing circuit comprises an input voltage sensor having a first input and a second input, a first voltage reference coupled to the first input, and an input voltage measuring circuit coupled to the second input. The pass device blocks the flow of current through the voltage regulator when the pass device is in the off state and limits the flow of current through the voltage regulator when the pass device is in the current regulation state.

Power input protection circuit

An energy storage system is provided that includes input terminals for receiving input energy from a remote power source and an energy storage device coupled to the input terminals. The energy storage device is operative to store at least of portion of the input energy and to supply stored energy to the input terminals. A pump device is also coupled to the input terminal and to the storage device. The pump device is operative to cause the energy storage device to store at least a portion of the input energy when the input energy level is above a first threshold level, and to cause the energy storage device to supply energy to the input terminals when the input energy level is below a second threshold level. The energy storage system is optionally provided with a current limiter for added protection against short circuits. In one embodiment, the current limiter is bi-direction; it protects against short circuits originating at both the power source and within the energy storage system. Also, the energy storage system is optionally provided with a safety discharge circuit that discharges the energy storage system upon its removal from the energy storage system.

Growing community of inventors

Bedford, TX, United States of America

William I H Chen