Abstract: According to one aspect, embodiments of the invention provide a gate driver comprising a level shifter circuit configured to be coupled to a controller, to receive control signals from the controller, each control signal having a voltage with respect to a control ground, and to redefine the voltage of each control signal with respect to a chip ground to generate redefined control signals, a gate driver chip coupled to the level shifter circuit and configured to be coupled to at least one semiconductor device, the gate driver chip further configured to provide bipolar control signals to the at least one semiconductor device based on the redefined control signals, and at least one power source configured to provide at least one positive supply voltage to the gate driver chip and at least one negative supply voltage to the gate driver chip and to the chip ground.

Abstract: An active filtering system arranged for being connected between a first power supply line and a second power supply line of a DC bus, the bus being arranged for being connected to a DC voltage source located upstream, the system including a first capacitor arranged for being connected both to the first power supply line of the bus and to the second power supply line of the bus and to the terminals whereof a voltage is applied including an AC component, a switching assembly controlled by a processor for generating a compensation voltage, opposite to the AC component of the voltage at the terminals of the first capacitor, and including a first terminal connected to the first capacitor and a second terminal intended to be connected to the second power supply line.

Abstract: According to one aspect, embodiments of the invention provide a method for operating an AC-DC rectifier, the method comprising receiving, with a converter, input AC power having an input AC voltage waveform, controlling, during a positive half line cycle of the input AC voltage waveform, the converter to couple a second DC bus to ground, controlling, during the positive half line cycle of the input AC voltage waveform, the converter to maintain a positive DC link voltage on a first DC bus, controlling, during the positive half line cycle of the input AC voltage waveform, output circuitry to charge a first output capacitor and provide a positive output voltage to a positive output, and discharging, during the positive half line cycle of the input AC voltage waveform, a second output capacitor to provide a negative output voltage to a negative output.

Abstract: According to one aspect, embodiments of the invention provide a power system including an input configured to be coupled to a power source and to receive input power from the power source, an output configured to be coupled to a load and to provide output power to the load, a power converter coupled between the input and the output, and an active ripple filter coupled to one of the output and the input including a DC link having at least one DC link capacitor and configured to generate a cancelling ripple voltage to cancel a ripple current associated with the power converter.

Abstract: An active filtering system arranged for being connected between a first power supply line and a second power supply line of a DC bus, the bus being arranged for being connected to a DC voltage source located upstream, the system including a first capacitor arranged for being connected both to the first power supply line of the bus and to the second power supply line of the bus and to the terminals whereof a voltage is applied including an AC component, a switching assembly controlled by a processor for generating a compensation voltage, opposite to the AC component of the voltage at the terminals of the first capacitor, and including a first terminal connected to the first capacitor and a second terminal intended to be connected to the second power supply line.

Abstract: According to at least one aspect, embodiments herein provide an adaptive battery pack module comprising a Li-ion battery, a low-voltage bus coupled to the Li-ion battery, a bi-directional DC-DC converter coupled to the low-voltage bus, a low-voltage output coupled to the low-voltage bus, a high-voltage output, and a high-voltage bus coupled between the bi-directional DC-DC converter and the high-voltage output, wherein the low-voltage output is configured to be coupled to at least one Li-ion battery of at least one external battery pack module, and wherein the bi-directional DC-DC converter is configured to receive DC power from the Li-ion battery and the at least one Li-ion battery of the at least one external battery pack module via the low-voltage bus, convert the received DC power into output DC power, and provide the output DC power to the high-voltage bus.

Abstract: Systems and methods of operating uninterruptible power supplies in parallel in a power distribution system to provide power to a load are provided. At least one uninterruptible power supply inverter provides power to the load. A communication interface provides a measured value of at least one of inverter output current of a first uninterruptible power supply and a measured value of the load current to a second uninterruptible power supply, and receives a measured value of at least one of inverter output current of the second uninterruptible power supply and the load current. A controller controls the uninterruptible power supplies to operate in one of a master state and a slave state.

Abstract: According to one aspect, embodiments herein provide a UPS comprising a transformer including a first primary winding configured to be coupled to a DC source, a second primary winding configured to be coupled to an AC source, and at least one secondary winding, control logic, and at least one output line, wherein the control logic is configured, in a first mode of operation, to enable the first primary winding to generate, based on power received from the DC source, a first output voltage at the at least one output line, and to disable the second primary winding, and wherein the control logic is configured, in a second mode of operation, to enable the second primary winding to generate, based on power received from the AC source, a second output voltage at the at least one output line, and to disable the first primary winding.

Abstract: An aspect of the present disclosure provides access via HTTP verbs to services implemented by stateless objects. In one embodiment, the list of services implemented by a stateless object deployed on an application server is displayed to a user/administrator. Upon receiving (from the user/administrator) an input data indicating selection of some of the services (from the displayed list), only the selected service are provided access via a corresponding HTTP verb. In other words, a first service that is included in the selection is provided access via a HTTP verb, while a second service not included in the selection is not made accessible via HTTP verbs. Thus, a user/administrator is facilitated to provide access via HTTP verbs to only services of interest among those implemented by a stateless object at or after the deployment of the stateless object.

Abstract: According to one aspect, embodiments herein provide a flyback converter comprising an input, an output, a rectifier, a transformer having a primary winding and a secondary winding, a switch, the switch being closed in a first mode of operation and open in a second and third mode of operation, and a regenerative snubber circuit, wherein the flyback converter is configured such that in the first mode of operation, the DC power from the rectifier charges the transformer, wherein the flyback converter is configured such that, in the second mode of operation, the snubber circuit is configured to store leakage energy from the primary winding, and wherein the flyback converter is configured such that, in the third mode of operation, the snubber circuit is configured to provide the stored energy to the primary winding. The flyback converter may also have high power factor at the input while operating from AC input.

Abstract: A power converter includes a first power input to receive AC input power, a second power input to receive backup power, a first DC bus configured to provide a positive DC output voltage, a second DC bus configured to provide a negative DC output voltage, and a power conversion circuit coupled to the first DC bus and the second DC bus. The power conversion circuit has an inductor, a first switch device coupled in series with the inductor, a second switch device coupled in series with the first switch device, and a bypass relay coupled in parallel with the second switch device. The power conversion circuit is switchably coupled to the first power input and the second power input, and is operable to charge the inductor and generate the positive and negative DC output voltages.

Abstract: An uninterruptible power supply includes a first input to receive input power from an input power source, an output to provide output power, a switch, a first logic power supply coupled to the switch, a back-up power source, a charger, a main logic power supply and power converter circuitry. The switch is configured to close when a characteristic of the input power is within a selected range. The first logic power supply is coupled to the switch and configured to receive input power from the input power source when the switch is closed. The first logic power supply has a first DC output. The back-up power source has a second DC output and is coupled to the first DC output at a common node. The charger has a third DC output and is coupled to the common node. The main logic power supply is coupled to the common node and is configured to receive at least one of the first DC output, the second DC output and the third DC output.

Abstract: According to one aspect, embodiments of the invention provide a method of operating a UPS system, the method comprising receiving, at an input of a first UPS, input power from a power source, generating, with a first analysis circuit, a first signal indicative of a characteristic of the input power, receiving, at the analysis circuit, a second signal from a second analysis circuit of a device coupled to the power source, the second signal indicative of a characteristic of input power received at the second analysis circuit, analyzing with the analysis circuitry, the first signal and the second signal, determining, whether an improper wiring condition exists at the input, in response to a determination that an improper wiring condition does not exist, providing output power to an output of the first UPS, and in response to a determination that an improper wiring condition does exist, de-energizing the first UPS.

Abstract: Systems and methods of operating uninterruptible power supplies in parallel in a power distribution system to provide power to a load are provided. At least one uninterruptible power supply inverter provides power to the load. A communication interface provides a measured value of at least one of inverter output current of a first uninterruptible power supply and a measured value of the load current to a second uninterruptible power supply, and receives a measured value of at least one of inverter output current of the second uninterruptible power supply and the load current. A controller controls the uninterruptible power supplies to operate in one of a master state and a slave state.

Abstract: A power converter includes a power input configured to receive input power from an AC power source, a power output configured to provide output power to a load, a battery interface configured to exchange DC power with a battery, and power converter circuitry. The power converter circuitry is adapted to, in a first interconnection configuration, convert the input power into the DC power at the battery interface, and, in a second interconnection configuration, convert the DC power at the battery interface into the output power. The power converter circuitry has a power line, a transformer, a first connection node switchably connected to the power line in the first interconnection configuration and switchably connected to the transformer in the second interconnection configuration, and a second connection node switchably connected to the transformer in the first interconnection configuration and switchably connected to the power line in the second interconnection configuration.

Abstract: An aspect of the present invention simplifies provisioning of asynchronous interaction with enterprise suites having synchronous integration points. In one embodiment, a digital processing system receives, from a user, data indicating that asynchronous interaction is required for a synchronous integration point of an enterprise suite, and in response, auto-generates a set of service oriented architecture (SOA) artifacts designed to synchronously invoke the synchronous integration point and provide asynchronous interaction with external systems. The auto-generated SOA artifacts are then deployed in SOA server, whereby external systems can interact asynchronously to access a functionality provided by the synchronous integration point. According to another aspect, the system, also receives from the user, a second data indicating a set of policies to be applied, and in response, auto-generates the set of SOA artifacts to implement the set of policies during asynchronous interaction with external systems.

Abstract: Systems and methods of operating uninterruptible power supplies in parallel in a power distribution system to provide power to a load are provided. At least one uninterruptible power supply inverter provides power to the load. A communication interface provides a measured value of at least one of inverter output current of a first uninterruptible power supply and a measured value of the load current to a second uninterruptible power supply, and receives a measured value of at least one of inverter output current of the second uninterruptible power supply and the load current. A controller controls the uninterruptible power supplies to operate in one of a master state and a slave state.

Abstract: An aspect of the present invention simplifies provisioning of asynchronous interaction with enterprise suites having synchronous integration points. In one embodiment, a digital processing system receives, from a user, data indicating that asynchronous interaction is required for a synchronous integration point of an enterprise suite, and in response, auto-generates a set of service oriented architecture (SOA) artifacts designed to synchronously invoke the synchronous integration point and provide asynchronous interaction with external systems. The auto-generated SOA artifacts are then deployed in SOA server, whereby external systems can interact asynchronously to access a functionality provided by the synchronous integration point. According to another aspect, the system, also receives from the user, a second data indicating a set of policies to be applied, and in response, auto-generates the set of SOA artifacts to implement the set of policies during asynchronous interaction with external systems.

Abstract: A power converter includes a first power input to receive AC input power, a second power input to receive backup power, a first DC bus configured to provide a positive DC output voltage, a second DC bus configured to provide a negative DC output voltage, and a power conversion circuit coupled to the first DC bus and the second DC bus. The power conversion circuit has an inductor, a first switch device coupled in series with the inductor, a second switch device coupled in series with the first switch device, and a bypass relay coupled in parallel with the second switch device. The power conversion circuit is switchably coupled to the first power input and the second power input, and is operable to charge the inductor and generate the positive and negative DC output voltages.

Abstract: An uninterruptible power supply includes a first input to receive input power from an input power source, an output to provide output power, a switch, a first logic power supply coupled to the switch, a back-up power source, a charger, a main logic power supply and power converter circuitry. The switch is configured to close when a characteristic of the input power is within a selected range. The first logic power supply is coupled to the switch and configured to receive input power from the input power source when the switch is closed. The first logic power supply has a first DC output. The back-up power source has a second DC output and is coupled to the first DC output at a common node. The charger has a third DC output and is coupled to the common node. The main logic power supply is coupled to the common node and is configured to receive at least one of the first DC output, the second DC output and the third DC output.