Electric power conversion systems – Current conversion – With means to connect the input to diverse power sources
Reexamination Certificate
1999-12-03
2001-05-15
Nguyen, Matthew (Department: 2838)
Electric power conversion systems
Current conversion
With means to connect the input to diverse power sources
Reexamination Certificate
active
06233166
ABSTRACT:
OBJECT OF THE INVENTION
The present invention relates to a power supply system to feed electric power continuously to electrical and/or electronic equipment, being of special but not exclusive application in a telecommunications system.
The power supply system is able of receiving power from any source and configuring a conversion path for producing at its output a voltage and current appropriate for the equipment that it is feeding.
STATE OF THE ART
Telecommunication systems are presently evolving very rapidly towards telecommunication systems in which radio signals are totally or partly replacing copper wire in the connection between the subscriber and the switching system. Thus, access systems that employ wireless and/or cordless, cellular, etc. technologies appear.
All these systems have the special feature of locating close to the subscribers, remote units containing, for example, some equipment related with the switching system and, also, equipment related with the radio system such as transmitters and receivers, all of which must be fed with electric power to operate.
As a result, the remote units incorporate power supply systems that serve to provide the electric power to enable the telecommunications part to set up communications between the subscribers and a public switched telephone network (PSTN), for example.
These telecommunications systems are very attractive for operators, either new or already having a telecommunications network, since they do not require an exhaustive planning study to be carried out in order to implement their deployment in a geographical area where it is desired to provide telephone services, for which reason they can be put into service very quickly and easily.
Nevertheless, the operators and, consequently, the suppliers of telecommunication systems, encounter the impediment of not knowing the electrical characteristics of the electric power source present in each of the locations selected for each of the remote units spread over the geographical area where the telecommunications system is to be implemented.
Thus, the need arises to employ a power supply system able of being connected to electric power sources having differing electrical characteristics, and to produce from the received electric power a voltage and current appropriate for the electrical characteristics of the communications equipment with which each remote unit is fitted, without the personnel installing the telecommunication system having to perform any manual intervention and, in addition, the deployment designers of the telecommunications network need not reject a possible site for a remote unit due to the electrical characteristics of the power supply existing at said location. As a result, the site selection shall be made on the grounds of the suitability or not for the telecommunications equipment included in the remote unit.
CHARACTERIZATION OF THE INVENTION
To overcome the problems mentioned above, an uninterrupted power supply system is proposed which offers dimensional and electrical operating characteristics suitable for being mounted together with telecommunications equipment, forming a remote unit, which is installed in the proximity of subscribers to a telecommunications system.
The uninterrupted power supply system of the invention receives electric power from an electric supply source, so that a recognising means, included in said power supply system, examines the received power in order to determine its electrical characteristics and, as a function of the results of the analysis performed, routes the power received over a determined power conversion path, obtaining at the end of said path electric power in a suitable form to be fed to the telecommunications equipment included in each remote unit.
Thus, the uninterrupted power supply system can be connected to a broad range of electric power sources, for which reason its installation is fast and straightforward, the only requirement being to connect the power supply system directly to the electric power source.
As a result, the installation of the different remote units of the telecommunications system is practically independent of the electrical characteristics of the electric power source that shall supply electric power to each remote unit, respectively.
The uninterrupted power supply system offers a high overall efficiency, low cost and compact size, as well as satisfying all international standards relative to the harmonics content of the input current, for example EN61000-3-2.
REFERENCES:
patent: 4780801 (1988-10-01), Gill et al.
patent: 4827151 (1989-05-01), Okado
patent: 5010469 (1991-04-01), Bobry
patent: 5896282 (1999-04-01), Wu
Alcatel
Nguyen Matthew
Sughrue Mion Zinn Macpeak & Seas, PLLC
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