Abstract: A fault detection system for a system having a single DC input and a plurality of A/C loads such as an electric or hybrid electric vehicle. A plurality of inverters convert DC to 3-phase A/C and supply A/C power to a corresponding individual A/C load. Each inverter includes a common mode current transformer and a controller. An individual corresponding common mode current transformer is coupled to the 3-phase A/C output of the inverter. An individual corresponding controller is coupled to the output of an individual corresponding common mode current transformer and is coupled to an individual corresponding A/C load. Each controller is configured to detect a fault at the individual corresponding A/C load and in the case of detection of a fault at an individual corresponding A/C load, the corresponding controller disables the A/C load.

Abstract: An electronic power device formed by a plurality of FETs formed on a circuit board formed of a plurality of layers, the plurality of transistors being formed on a first surface of the circuit board, the plurality of layers including a plurality of gate drive layers, a plurality of gate return layers, and a plurality of power layers. A gate drive circuit is formed on a second surface of the circuit board, the second surface being opposite the first surface, the gate drive circuit being connected to the gate and source of each of the plurality of transistors through the plurality of gate drive layers and the plurality of gate return layers. A voltage supply is connected to the drain of each of the plurality of transistors, the connections of the voltage supply to each of the plurality of transistors being interleaved through the plurality of power layers.

Abstract: Roofing tiles and associated methods are used in the construction of multi-functional roofs. Tiles are fit together to define an internal cavity which can be sealed to maintain a gas, liquid and/or other material therein. Filling materials include such things as fire retardants, colored materials, heatable liquid or other materials to provide different functional aspects for a roof made from the tiles.

Abstract: Roofing tiles and associated methods are used in the construction of multi-functional roofs. Tiles are fit together to define an internal cavity which can be sealed to maintain a gas, liquid and/or other material therein. Filling materials include such things as fire retardants, colored materials, heatable liquid or other materials to provide different functional aspects for a roof made from the tiles.