Abstract: An example operation may include one or more of detecting a potential event via sensors on a transport, sending data related to the potential event to other transports within a predefined distance, storing the data at the transports and a server, and performing a transport operation response on the transports.

Abstract: In both lateral and vertical gate turn off devices, the P anode emitter efficiency is controlled by a monolithic N channel device. Bipolar control is effected by connecting an electrode to the region that, in the MOS control mode, would have a dielectric layer disposed between it and the MOS gate. In combination with the P anode emitter control, several structures for controlling the cathode N emitter efficiency are disclosed.

Abstract: A pulse arc welding power supply incorporating one or more series resonant converters (SRC) for converting D.C. power to A.C. power which is then rectified to supply welding current. Each series resonant converter includes a series resonant tank circuit consisting of a capacitor, an inductor and the primary winding of a transformer whose secondary winding supplies current to the welding arc. The undesirable secondary output capacitor of the prior art is eliminated, as all the capacitance in the series resonant circuit is located on the primary side of the transformer. Current sensors sense the ringing current in the resonant circuit and also the load current and produce respective feedback signals which are used to control the switching frequency of an SCR bridge in the tank circuit, thereby maintaining the welding current at a desired value.

Abstract: A semiconductor device is manufactured similar to a gate turn off (GTO) thyristor but employs PNP bipolar transistors in place of the usual anode P islands. In one modification, the PNP bipolar transistors of the basic device are replaced with P channel, enhancement mode MOSFETs.

Abstract: An uninterrupted power source (UPS) system is provided by utilizing a synchronous motor to power an alternator which provides the desired uninterrupted output power. Normally, the synchronous motor is powered by utility line power. However, an interruption in utility power will cause the motor-alternator set to slow down, although the inertia of the system will continue generating power. If the utility power interruption is sufficient such that the alternator output frequency drops more than 1 Hz, or if reverse power flow is detected from the synchronizing motor back into the utility grid, the motor is automatically powered by an inverter driven from a battery-powered current source. A feedback system from the alternator output insures that the inverter is synchronized with the synchronous motor in order to quickly bring the alternator's output back up to the desired voltage and frequency level.

Abstract: In a three phase welding power supply, the three phase power is connected to a welding arc by a power control circuit having three conducting paths for straight polarity current and three conducting paths for reverse polarity current. The power control circuit comprises a three phase bridge rectifier circuit having eight bridge arms each including a silicon controlled rectifier with the bridge circuit being connected between the three phase power source and the welding arc which is in turn connected to the three phase power supply neutral. An inductor is connected across the direct current terminals of the bridge circuit so that arc current flows in one direction through the inductor regardless of the polarity of the arc current. The conducting paths are selectively activated at non-zero voltage points to conduct repetitive sequences of independent numbers of straight polarity half cycles of arc current followed by independent numbers of reverse polarity half cycles of arc current to the welding arc.

Abstract: A plurality of SCR diamond bridge circuits are coupled in series to generate frequencies higher than the individual operating frequencies of the SCR's. The series chain of diamond circuits is preferably coupled in parallel with the series combination of a DC blocking capacitor and an inductive load. The chain is provided with current from a substantially ripple-free constant current source, and the firing times of individual SCR's can be controlled to minimize the di/dt in each SCR.

Abstract: The position of the main rheostat on an arc welding machine determines the pre-set welding current. An operator, working at a location remote from the welding machine, carries a pen-type adjustable rheostat which carries calibrations indicative of various percentages of the pre-set welding current. There are no extra electrical connections, such as wires, between the remote rheostat and the welding machine. If the operator wishes to change the magnitude of the welding current, he need not return to the main rheostat at the welding machine, but instead merely sets the remote rheostat for the percentage of pre-set current desired, and inserts the remote rheostat between the electrode holder and the workpiece. The minimum resistance of the remote rheostat is sufficiently high to prevent an arc from being struck. A current transformer in the welding machine senses the output (calibrating) current flowing through the welding cable.

Abstract: A "chopper" type armature current control system for a D.C. motor when connected across the output of a rectifier, A.C. to D.C. type supply source that is characterized by having closed-loop regulating control, and having overhauling load energy dissipating circuit which is automatically connected between the motor armature circuit and the low potential side of the source output whenever the potential across the output sides of the source exceeds a predetermined value. A modified form provides addition of a fixed D.C. potential to afford enhanced speed of system response, and controlled slow speed reverse operation of the motor.

Abstract: A solid state, current source, polyphase inverter induction motor drive is disclosed wherein the current source is derived from a constant potential buss. Each side of the buss is connected to the inverter via a separate chopper. The choppers normally operate in unison to supply a controlled current to the inverter. Each time the inverter sequence is to be advanced, the chopper current is reduced to zero on the side of the inverter, either positive or negative, that requires a commutation. Chopper current is then reinstigated and feeds the next set of inverter thyristors in the inverter sequence. Alternative means for rendering the current source non-inductive during inverter commutations, and transformerless means for providing motor voltages well above rated voltage are also disclosed.