Honeywell International Inc.

Boris Plivcic

Zhenning Liu

Wenjiang Yu

Daniel G Filimon

Randy Fuller

Yang Ye

Ted J Gayowsky

That Nguyen

Anita Ramroop

Methods and apparatuses implement a thermal memory effect for a solid state power controller. A solid state power controller trip apparatus with thermal memory according to one embodiment comprises: a trip module including a first capacitor () and a counter (), wherein the first capacitor () charges multiple times, when an over current event occurs, and the counter () accumulates a count related to the charging of the first capacitor () for the multiple times, to detect a trip condition; and a discharging module connected to the trip module, the discharging module including a resistor () and a second capacitor (), wherein an electrical parameter associated with the count decays with time using the resistor () and the second capacitor ().

SSPC technology incorporated with thermal memory effects to achieve the fuse curve coordination

The invention provides an apparatus for shunting leakage current of a solid state switching device (SSSD) (). The apparatus selectively provides a shunt pathway to divert current away from the output load based on the switching state of the SSSD. The apparatus may include a shunt impedance component () connected to the SSSD, and a switching element () for selectively connecting the other end of the shunt impedance component to ground based on the switching state of the SSSD. Accordingly, when the SSSD is turned off, the switching element is switched to a state that connects the shunt impedance component to ground, thereby shunting leakage current.

Leakage current shunt in an electrical power distribution system utilizing solid state relays

Redundant functionality is implemented in a control of solid state power switching controller (SSPC) () to ensure that each power switching channel operates according to a default configuration in case of failure. Each power switching channel in the SSPC includes a solid state switching device (SSSD) () that is controlled by a supervisory controller () to perform power switching functions for a corresponding load. The SSPC further includes a nonvolatile memory device () that stores default commands for controlling the SSSDs in case the SSPC enters into a backup mode, e.g., due to a failure in the supervisory controller. The nonvolatile memory device may be assembled on the same SSPC circuit board as the power switching channels, thereby ensuring that backup control is performed locally in the SSPC device.

Backup control for solid state power controller (SSPC)

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Oakville, Canada

Boris Plivcic