Abstract: An electrical connection system including a triaxial socket and a triaxial plug, each having three concentric contacts—an inner, an intermediate and an outer contact. In the process of connecting, the outer contacts connect first, the inner contacts connect second, and the intermediate contacts connect third. All contacts except the plug inner contact are connected to an insulator that covers one radial side of the contact, and extends past and over the end of the contact. Two of the insulators isolate the inner contacts from the intermediate contacts prior to either of their connections being made.

Abstract: An electrical connection system including a triaxial socket and a triaxial plug, each having three concentric contacts—an inner, an intermediate and an outer contact. In the process of connecting, the outer contacts connect first, the inner contacts connect second, and the intermediate contacts connect third. All contacts except the plug inner contact are connected to an insulator that covers one radial side of the contact, and extends past and over the end of the contact. Two of the insulators isolate the inner contacts from the intermediate contacts prior to either of their connections being made.

Abstract: An electrical power conversion system that supplies the maximum available output power from a power source such as a solar array to a plurality of loads such as rechargeable batteries. The output power of the solar array peaks at an optimum current that is less than is maximum available output current. The system includes a controller and a plurality of dc-to-dc converters that charge the batteries. The controller monitors the solar array's output power and adjusts the battery charging by generating a current control signal that tracks a peak of the solar array's available output power and sets a current limit such that the combined current draw of the plurality of dc-to-dc converters is substantially equal to the solar array's optimum current at which it provides its maximum available power. The electrical power and control signals are transmitted from the power source and controller to the power converters on three bus bars, including a power bus, a control bus, and a common bus.

Abstract: AC mains voltage input is directed to a bridge rectifier and converted to a DC voltage output. This DC power supplies an inverter which reconverts it to variable frequency AC output, used to drive a variable-speed AC motor.A microprocessor-based control unit generates firing pulses for SCR's in both the rectifier and inverter. It maximizes the efficiency of the rectifier by generating phase delay and sequencing data in advance of each line-to-netural zero-crossover of the AC mains voltage input; it makes the voltage and frequency of the inverter AC output both proportional to the value of the DC voltage output, enabling the system to maintain a constant volts/Hertz ratio between the AC output voltage and the AC output frequency.Appropriate fault protection circuits are included with the control unit to prevent fault conditions from damaging the system.