Abstract: Systems, methods and devices for a coaxial cable transmission system. A power supply receives a primary power signal from a power source. The power supply generates a switched direct current power signal from the primary power signal. A power gateway receives the switched direct current power signal over a coaxial cable from the power supply. The power gateway generates a secondary power signal from the switched direct current power signal. A load device receives the secondary power signal from the power gateway. In some implementations, the power supply generates the switched direct current power signal at a positive direct current voltage level for a first part of a time period and at a negative direct current voltage level for a second part of the time period.

Abstract: A ferroresonant transformer assembly comprising, a core, a main shunt, first, second, and third windings, first and second tap connectors, and a selection connector. The first windings configured to be operatively connected to a primary power source. The first tap connector operatively connected to a first intermediate point defined by the third windings. The second tap connector operatively connected to a second intermediate point defined by the third windings. The selection connector operatively connected to the at least one load. Based on voltage requirements of the at least one load, the selection connector is operatively selectively connected to a selected tap connector selected from the first and second tap connectors.

Abstract: An uninterruptible power supply for providing an output power signal to a load comprises a ferroresonant transformer, a resonant capacitor, and an inverter. The resonant capacitor is operatively connected to the ferroresonant transformer. The inverter is operatively connected to the ferroresonant transformer. The inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit. The at least one inverter control signal is held in an OFF state during at least a portion of the at least one change of phase, pulse-width modulated during at least a portion of the at least one change of phase, and held in an ON state when the output power signal is at the upper limit.

Abstract: An uninterruptible power supply adapted to be connected between an AC line and a load, comprising a battery system, an inverter, and a transformer, and a controller. The battery system stores battery power. The inverter is operatively connected to the battery system. The transformer is operatively connected to the AC line, the load, and an inverter winding operatively connected to the inverter. The controller controls the inverter to supply power to the primary winding using battery power stored in the battery system based on a cost value indicative of reduction of life of the battery system.

Abstract: Systems, methods and devices for a coaxial cable transmission system. A power supply receives a primary power signal from a power source. The power supply generates a switched direct current power signal from the primary power signal. A power gateway receives the switched direct current power signal over a coaxial cable from the power supply. The power gateway generates a secondary power signal from the switched direct current power signal. A load device receives the secondary power signal from the power gateway. In some implementations, the power supply generates the switched direct current power signal at a positive direct current voltage level for a first part of a time period and at a negative direct current voltage level for a second part of the time period.

Abstract: A ferroresonant transformer system has a core, a shunt, first and second input windings, an inverter winding, a tank winding, a resonant capacitor, an output capacitor, and a plurality of switches. The tank winding defines a plurality of switch tap locations and at least two output tap locations. The resonant capacitor is connected across at least a portion of the tank winding. Each switch is operatively connectable between one of the switch tap locations and the resonant capacitor. Each output terminal is operatively connected to one of the at least two output tap locations.

Abstract: A battery system a plurality of battery strings, a charge equalization circuit, a relay matrix, and a balance controller. The plurality of battery strings comprises at least three batteries connected in series, where the battery strings are connected in parallel. The charge equalization circuit is capable of transferring charge between a pair of series connected batteries. The relay matrix is operatively connected between the charge equalization circuit and the plurality of battery strings. The balance controller operates the relay matrix based on at least one of a voltage and a current of any one of the batteries such that the charge equalization circuit is connected across any one of the pairs of series connected batteries in any one of the plurality of battery strings such that the charge equalization circuit transfers charge between the batteries in the pair of series connected batteries to which the charge equalization circuit is connected.

Abstract: A ferroresonant transformer assembly, which is adapted to be connected to a primary power source, an inverter system, a resonant capacitor, and at least one load, comprises a core, a main shunt, and first, second, and third windings. The main shunt is arranged to define a primary side and a secondary side of the ferroresonant transformer. The first windings are arranged on the primary side of the ferroresonant transformer and are configured to be operatively connected to the primary power source. The second windings are arranged on the secondary side of the ferroresonant transformer and are configured to be operatively connected to the inverter system. The third windings arranged on the secondary side of the ferroresonant transformer and are configured to be selectively operatively connected to or disconnected from the resonant capacitor.

Abstract: A power supply configured to operatively connect at least one load to at least one DC power source comprises an AC bus, a DC bus, a DC/AC converter, and a load balancer. The AC bus is adapted to be operatively connected to the load. the DC/AC converter is operatively connected between the DC bus and the AC bus. The load balancer is adapted to be operatively connected to the at least one DC power source and operatively connected to the DC bus. The power supply supplies power to the load from the first DC power source through the load balancer, the DC bus, the DC/AC converter, and the AC bus.

Abstract: The technology described herein is generally directed towards a gateway device (e.g., a cable modem or telecommunications modem) that is coupled to a base component. The base component couples to an interchangeable lid that is coupled to an electronic device. This forms a sealed housing for outdoor use, e.g., between a provider head end and the subscriber(s). A universal interface provides power or a network connection, or both, to the electronic device. The base component and/or the sealed housing protect the internal components against environmental effects. The base component and/or the sealed housing protect against external RF signals from entering, and internally generated RF signals from exiting.

Abstract: A power supply system comprises a primary regulation system, a secondary regulation system, and a controller. The primary regulation system comprises a primary transformer and a primary tap switch array. The secondary regulation system comprising a secondary transformer and an adjustment power signal generator. The controller is configured to control the adjustment power signal generator to apply an adjustment power signal to the secondary transformer. The secondary transformer is configured to combine the adjustment power signal with a base power supply signal from the primary transformer.

Abstract: An uninterruptible power supply for providing an output power signal to a load comprises a ferroresonant transformer, a resonant capacitor, and an inverter. The resonant capacitor is operatively connected to the ferroresonant transformer. The inverter is operatively connected to the ferroresonant transformer. The inverter is configured to generate the output power signal based on at least one inverter control signal such that the output power signal is a quasi square wave having at least one change of phase and an upper limit. The at least one inverter control signal is held in an OFF state during at least a portion of the at least one change of phase, pulse-width modulated during at least a portion of the at least one change of phase, and held in an ON state when the output power signal is at the upper limit.

Abstract: A battery system comprising a plurality of battery strings, a charge equalization circuit, a relay matrix, and a balance controller. The plurality of battery strings comprises at least three batteries connected in series, where the battery strings are connected in parallel. The charge equalization circuit is capable of equalizing the charge on any pair of series connected batteries in any one of the plurality of battery strings. The relay matrix is operatively connected between the charge equalization circuit and the plurality of battery strings. The balance controller operates the relay matrix based on at least one of a voltage and a current of any one of the batteries such that the charge equalization circuit is connected across any one of the pairs of series connected batteries in any one of the plurality of battery strings.

Abstract: An uninterruptible power supply adapted to be connected between an AC line and a load a battery system for storing battery power, an inverter, a transformer, and a controller. The inverter is operatively connected to the battery system. The transformer comprises a primary winding adapted to be operatively connected to the AC line, a load winding adapted to be operatively connected to the load, and an inverter winding operatively connected to the inverter. The controller controls the inverter to operate in a first mode in which the inverter supplies power to the battery system, a second mode in which the inverter supplies power to the load winding using battery power stored in the battery system, and, based on a cost value indicative of reduction of life of the battery system, a third mode in which the inverter supplies power to the primary winding using battery power stored in the battery system.