Abstract: Disclosed herein is a novel bus bar design for use with double-sided cold plates. The bus bar has a ‘symmetry’ such that the same bus bar can be used, depending on its orientation, to connect on either side of the cold plate. Thus, two identically formed bus bar parts, with one of the parts rotated through 180 degrees relative to the other, can be interconnected to form a bus bar assembly. This can reduce unique part counts.

Abstract: A toroidal inductor includes a toroidal core and at least one coil is disclosed. Each coil comprises at least one first winding portion, and at least one second winding portion. At least one first winding portion comprises at least one alpha electrical pathway which extends between a first alpha pathway end to a second alpha pathway end. At least one second winding portion comprises at least one beta electrical pathway which extends between a first beta pathway end to a second beta pathway end (30B). The first and second winding portions are electrically connected to form at least one coil wound around the toroidal core. Each coil is comprised of a plurality of pathway units, and each pathway unit comprises an alpha electrical pathway connected to a beta electrical pathway.

Abstract: A drive system comprises a DC-DC converter that is arranged to receive an input voltage from a battery having a nominal battery voltage. The DC-DC converter has a first mode of operation in which the DC-DC converter generates a regulated output voltage from the input voltage and supplies the regulated output voltage to a load, and a second mode of operation in which the DC-DC converter is by-passed such that the input voltage from the battery is supplied to the load. A controller is arranged to compare the input voltage to a threshold voltage that is less than the nominal battery voltage. The controller operates the DC-DC converter in the first mode when the input voltage is less than the threshold voltage, and operates the DC-DC converter otherwise.

Abstract: A drive system comprises a DC-DC converter that is arranged to receive an input voltage from a battery having a nominal battery voltage. The DC-DC converter has a first mode of operation in which the DC-DC converter generates a regulated output voltage from the input voltage and supplies the regulated output voltage to a load, and a second mode of operation in which the DC-DC converter is by-passed such that the input voltage from the battery is supplied to the load. A controller is arranged to compare the input voltage to a threshold voltage that is less than the nominal battery voltage. The controller operates the DC-DC converter in the first mode when the input voltage is less than the threshold voltage, and operates the DC-DC converter otherwise.

Abstract: A sensor system for monitoring a motor in an aircraft includes a wireless sensor arranged to measure a parameter of the motor. The wireless sensor is further arranged to transmit the parameter to an external wireless receiver. An energy harvesting unit is provided that a mass-spring unit arranged to be mechanically coupled to the aircraft and is arranged to convert mechanical energy arising from motion of the mass-spring unit to electrical energy, and to supply said electrical energy to the wireless sensor.

Abstract: A variable frequency motor drive system configured such that the dc link capacitor charge is increased gradually, thus avoiding the above-mentioned transients. In the most preferred embodiment, the present invention ensures a gradual increase in the rectified voltage by providing the rectifier as a half-controlled thyristor rectifier (SCR) in place of the standard diode rectifier.

Abstract: A variable frequency motor drive system configured such that the dc link capacitor charge is increased gradually, thus avoiding the above-mentioned transients. In the most preferred embodiment, the present invention ensures a gradual increase in the rectified voltage by providing the rectifier as a half-controlled thyristor rectifier (SCR) in place of the standard diode rectifier.