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Power module and distributed power supply apparatus
|| List of recent Standby-related patents
|Hot standby power supply for a variable frequency drive|
A hot standby power supply for a variable frequency drive of a floating vessel is provided. The variable frequency drive may power an electric motor of the floating vessel.
|Power module and distributed power supply apparatus|
There are provided a power module in which a bias voltage is varied and supplied to a control circuit controlling power conversion when an idle mode is switched to a normal mode, and a distributed power supply apparatus having the same. The power module includes: a power factor correction stage; a dc/dc conversion stage switching power to convert the power into pre-set dc power in a powering mode in which normal power is output; a standby stage converting the power into pre-set standby power in a cold standby mode in which the dc/dc conversion stage outputs power having a level lower than that of normal power; and a variable bias supply unit varying a voltage level of bias power for controlling dc/dc power conversion and supplying the same to the dc/dc conversion stage in the cold standby mode and the powering mode..
|Protocol for supporting gateways with redundant routers in a shared domain|
In an example embodiment, an apparatus with a first interface coupled to a local domain with routers that employ a redundant router protocol, such as hot standby router protocol (hsrp) and/or virtual router redundancy protocol (vrrp), and a second interface coupled with a shared domain, such as virtual private lan (local area network) service (vpls), and virtual bridging logic coupled with the first and second interfaces. The virtual bridging logic performs packet snooping, filtering and/or provides a proxy service so that the routers employing the redundant router protocol are localized in the local domain, and avoids the routers employing the redundant router protocol from associating with other routers employing the redundant routing protocol that are in another local domain coupled with the shared domain..
|Dual-channel hot standby system and method for carrying out dual-channel hot standby|
A dual-channel hot standby system and a method for carrying out dual-channel hot standby, the system comprises a hot standby status management layer including two hot standby management units, an application processing layer including two application processors, and a data communication layer including two communicators; the hot standby status management layer is used for controlling the setting and switching between a active status and a standby status of the two application processors, monitoring the working status of the data communication layer, and carrying out synchronization of the control cycles for the two channels of the system; wherein one of the hot standby management units controls one of the application processors, and together constitute a channel of the system therewith; the data communication layer is used for receiving data from outside, and forwarding the data to the application processing layer. The present invention avoids the occurrence of “dual-channel-active” or “dual-channel-standby” status; ensures synchronization of the control cycles of two channels; reduces the time of the system for responding to breakdowns; meets the real-time requirements; enhances the reliability and availability of the system; and ensures a seamless switching between active and standby statuses..
|Method and system for minimizing disruption during in-service software upgrade|
A method and a system for in-service software upgrade in a hot standby redundant distributed (hsrd) system are provided. A standby route processor in hsrd system is updated with upgraded software.
|Method and apparatus for quick-switch fault tolerant backup channel|
In a network environment, the quality of service becomes an important issue particularly for applications involved with real-time multimedia streaming. Any transmission failure may cause service disruption and the failure has to be quickly recovered to minimize the impact.
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