Abstract: A vector controller for a polyphase synchronous rectifier, a method of vector-controlling a polyphase synchronous rectifier, and a synchronous rectifier incorporating the vector controller or the method. In one embodiment, the vector controller includes: (1) an input line voltage detector configured to detect voltages on at least two rectifier input lines and produce therefrom a neutral excursion vector and (2) a neutral excursion compensator, coupled to said input line voltage detector, that applies said neutral excursion vector to a partially compensated drive vector to yield an excursion-compensated drive vector suitable for generation of excursion-compensated pulse-width modulated drive signals for said synchronous rectifier.

Abstract: The present invention provides a phase voltage circuit. In one embodiment, the phase voltage circuit includes a line voltage stage coupled to at least three input voltage lines and configured to provide at least two corresponding line voltages. Additionally, the phase voltage circuit also includes a difference voltage stage coupled to the line voltage stage and configured to provide at least one phase voltage from the at least two corresponding line voltages.

Abstract: The present invention is directed to an environmental control system for use with a battery cabinet having at least one battery and a fan employable to circulate air through the battery cabinet, and method of operating the fan to circulate air through the battery cabinet. In one embodiment, the environmental control system includes a voltage sensor that monitors a voltage associated with the battery, and a battery temperature sensor that monitors a temperature of the battery. The environmental control system also includes a fan control subsystem, coupled to the voltage and battery temperature sensors, that activates the fan upon an occurrence of one of: the temperature of the battery exceeding a predetermined temperature, and the voltage associated with the battery exceeding a predetermined voltage.

Abstract: A magnetic device is provided that may be employed with surface mount technology. In an advantageous embodiment, the magnetic device includes a magnetic core having a magnetic core half and a springable winding positioned about at least a portion of the magnetic core half. The springable winding includes a terminus biased against the magnetic core half.

Abstract: A multiple output converter, and related method of operation thereof, that includes a primary output and at least one auxiliary output. In one embodiment, the multiple output converter includes a transformer having a primary winding and at least one secondary winding. The multiple output converter also includes a switch, coupled to the primary winding, that impresses an input voltage across the transformer. A first output voltage of the multiple output converter is produced at the primary output via a magnetizing inductance associated with the transformer. The multiple output converter still further includes an output inductor coupled to the at least one secondary winding. A second output voltage of the multiple output converter is produced at the auxiliary output via the output inductor.

Abstract: The present invention is directed to an auxiliary active clamp circuit and a method of clamping a voltage of a rectifier switch associated with a power converter. The power converter includes a main active clamp circuit associated with a main power switch coupled to a primary winding of a transformer and a rectifier switch coupled to a secondary winding of the transformer. The main power switch conducts during a main conduction period of the power converter and the rectifier switch conducts during an auxiliary conduction period of the power converter. In one embodiment, the auxiliary active clamp circuit includes an auxiliary clamp capacitor, coupled across the rectifier switch, that stores a clamping voltage substantially equal to an off-state voltage of the rectifier switch.

Abstract: An apparatus for providing battery power to a telecommunication system having a plurality of components mounted in an equipment rack that presents a standard width for receiving the components. In one embodiment, the apparatus includes: (1) a housing configured for mounting above at least some of the plurality of components in the equipment rack and (2) at least one battery pack contained within the housing and consisting of sealed unit battery cells. In another embodiment, the apparatus includes: (1) a housing configured for mounting anywhere in the equipment rack and (2) at least one battery pack contained within the housing and consisting of sealed unit battery cells that employ lithium battery technology.

Abstract: An apparatus for effecting an improved electrical connection structure between a component and a substrate in an installed orientation is employed where the component presents at least one electrical connection lead for establishing the electrical connection. The apparatus includes a mass of compressible dielectric material substantially fixedly situated between the component and the substrate in the installed orientation in substantially surrounding relation about the at least one electrical connection lead and substantially in register with the component.

Abstract: A controller for, and related method of, controlling first and second alternately conducting switches of a power converter. In one embodiment, the controller includes a sensing circuit configured to sense a parameter representative of an input voltage of the power converter. The controller also includes a modification circuit configured to alter a drive signal to one of the first and second switches thereby modifying a delay between conduction intervals of the first and second switches as a function of the input voltage.

Abstract: A system is configured for installing a replaceable component at a replaceable component locus in an equipment cabinet having a front and back plane and a plurality of sides. A fixed component occupies a first volume that establishes a replaceable component volume between the first volume and the back plane. The system includes: (a) a substrate supporting the replaceable component that presents substantially parallel first and second edges in a substrate plane; and (b) a guide structure fixed with the cabinet that cooperates with the substrate to slidingly move the substrate along a replacement route between the front plane and a replacement locus in the replaceable component volume in alternate first and second installation movements. The first installation movement is responsive to a first installation force applied to the substrate in the substrate plane. The second installation movement is responsive to a second installation force applied generally perpendicular with the substrate plane.

Abstract: A gate driver and a method of driving a switch for use with a power converter having a main active clamp circuit associated with a main power switch coupled to a primary winding of a transformer and a rectifier switch coupled to a secondary winding of the transformer. The main power switch conducts during a main conduction period of the power converter and the rectifier switch conducts during an auxiliary conduction period of the power converter. In one embodiment, the gate driver includes a DC offset bias circuit, coupled to a secondary winding of the transformer, that provides a gate drive signal having a DC bias voltage to a gate terminal of the rectifier switch.

Abstract: The present invention provides a bias supply selection circuit employable with a linear regulating device configured to provide a first bias supply voltage and a main bias supply stage configured to provide a second bias supply voltage. In one embodiment, the bias supply selection circuit includes a voltage monitoring circuit configured to monitor a level of the second bias supply voltage and to provide a control voltage proportional to the level. Additionally, the bias supply selection circuit includes a controllable switching circuit, coupled to the voltage monitoring circuit, configured to select the second bias supply voltage by deactivating the linear regulating device when the control voltage reaches a predetermined value.

Abstract: The present invention provides an integrated controller for use with a power supply employing a pulse width modulator and a method of operation thereof. In one embodiment, the integrated controller includes a primary control circuit configured to provide a control signal to the pulse width modulator. Additionally, the integrated controller includes a feedback circuit configured to monitor an output signal of the pulse width modulator and to modify the control signal thereby enabling a substantially monotonic increase in an output voltage of the power supply output voltage during a non-steady state period of operation thereof.

Abstract: A bias supply circuit and a method of operating a bias supply circuit for use with a switching power supply employing a main switch and an auxiliary switch and having an input voltage and a voltage across a clamp capacitor coupled to a transformer. In one embodiment, the bias supply circuit includes a bias supply winding associated with the transformer and configured to provide a first voltage dependent on at least one of the input voltage and the voltage across the clamp capacitor during a conduction period of the main switch or the auxiliary switch. Additionally, the bias supply circuit further includes a bias supply storage capacitor coupled to the bias supply winding and configured to provide a second voltage dependent on at least another of the input voltage and the voltage across the clamp capacitor during a conduction period of another of the main switch or the auxiliary switch. A sum of the first voltage and the second voltage provides a bias supply voltage.

Abstract: For use with a rack for supporting a first battery having first terminals and a second battery having second terminals, an interlock kit comprising a partition mount and a partition. The partition mount is couplable to the rack proximate the first battery and the second battery. The partition is coupled to the partition mount and translatable between a first battery access position that allows access to ends of the first terminals and obstructs access to the second terminals and a second battery access position that allows access to ends of the second terminals and obstructs access to the first terminals.

Abstract: For use with an electronic circuit having first and second reference nodes, a voltage reference translation system and a method of converting signals between the first and second reference nodes are provided. In one embodiment, the voltage reference translation system includes first and second inductors coupled to a common magnetic core and interposed between the first and second reference nodes. Additionally, the voltage reference translation system includes a conversion path coupled through a portion of the common magnetic core configured to substantially convert a signal associated with the first reference node into a signal associated with the second reference node.

Abstract: The present invention provides for a self-aligned, panel mounted cord set, a method of manufacture therefor and an electronic equipment chassis employing the same. One end of the cord set is mounted in an aperture on a panel of an electronic equipment chassis (typically a back panel). The cord set self-aligns when mounted in the aperture to provide a mating connection with an electronic module housed in the chassis. In one embodiment of the invention the self-aligned panel mounted cord set has an elongated body with first and second opposing ends. Coupled to the first end is a power cord configured to mate with an electrical source, such as an AC wall outlet. Coupled to the second end is an electronic module connector configured to mate with the electronic module. About the elongated body is a flange with an alignment post thereon configured to align the elongated body with respect to the panel when positioned in the aperture.