Leach International Corporation

Anhtai Le Tran

Imtiaz Ahmad Khan

Farshid Tofigh

Tony Hana

Kyle Richard Cantu

Chad Uyehara

A method of protecting a load circuit includes sensing a load current passing through a switch electrically in series with the load circuit, sensing a voltage drop across the switch, determining a rate of change of the voltage drop across the switch, determining whether to deactivate the switch based on the load current and the rate of change of the voltage drop across the switch, in response to determining to deactivate the switch, deactivating the switch to shut off current to the load circuit.

System and method for distinguishing short-circuit events in high inrush current systems

An electromechanical switching protection system includes an electromechanical switchgear having contacts configured to selectively open and close in response to a control signal, and a junction field effect transistor (JFET) device electrically connected in series with the electromechanical switchgear between an input terminal and an output terminal of the electromechanical switching protection system, a gate of the JFET device being electrically connected to the output terminal.

System for protecting electromechanical switchgears and protection circuits in high-voltage applications

There is provided a protection circuit configured to indicate an overcurrent condition of a conductor conducting a load current, the protection circuit including a first current integrator and a second current integrator, each of the first and second integrators being configured to integrate an input voltage proportional to the load current, a summing amplifier configured to receive an offset voltage, to amplify a signal from the second integrator, and to generate a trip threshold based on the input voltage and the offset voltage, and a comparator configured to compare an output of the first current integrator and the trip threshold, and to generate a trip signal at a trip time when the trip threshold is equal to an output of the first integrator, the trip signal indicating an overcurrent condition.

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Systems and methods for balancing multi-cell batteries are provided. In one embodiment, the battery balancing circuit includes a battery including a plurality of cells coupled in series, a first terminal and a second terminal, a transformer including a primary winding and a plurality of secondary windings, where each secondary winding is coupled to one of the plurality of cells via a secondary switch and a rectifier circuit, where the primary winding is coupled between the first terminal and the second terminal of the battery, a primary switch in series with the primary winding of the transformer, and a control circuitry coupled to the primary switch, the plurality of secondary switches, and each of the plurality of cells.

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Santa Ana, CA, United States of America

Anhtai Le Tran