Voltage switch-over device

Electricity: battery or capacitor charging or discharging – Capacitor charging or discharging

Reexamination Certificate

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Reexamination Certificate

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06369548

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a voltage switch-over device.
2. Description of the Prior Art
A method of controlling a voltage switching device is known from EP 0 476 278 A2, in which two storage elements are charged to an appropriate energy value by means of a charger, the energy delivered by a power source being converted from alternating voltage to direct voltage by a power rectifier, thereby establishing a current circuit with a consumer. During the procedure of charging the storage elements, the rating of the energy delivered by the power source is evaluated or determined by a mains evaluating device, and another switchable power rectifier is switched into or out of the power source depending on the rating of the energy delivered.
A rectifier current supply circuit is also known from EP 0 021 714 A, in which two storage elements are powered from a power source and a power rectifier is connected in between, in order to supply a consumer with energy.
SUMMARY OF THE INVENTION
The underlying object of this invention is to provide a voltage switch-over device that provides simple means of switching from one power supply having a given voltage rating to another power supply with a different voltage rating.
This object is achieved by the invention with a voltage switch-over device comprising a first power rectifier having a positive and a negative potential; a charger, the first power rectifier being connected to the charger; a power supply; mains leads connecting the charger to the power supply; a second power rectifier having a positive and a negative potential; two consumers; a mains evaluation unit coupled to the charger, the mains evaluation unit switchably connecting the second power rectifier to the power supply and the consumers; two storage elements; and a first connection between the positive potential of the first power rectifier and the negative potential of the second power rectifier, and a second connection between the negative potential of the first power rectifier and the positive potential of the second power rectifier, a respective one of the storage elements being arranged in each connection; and a respective one of the storage elements being arranged in an independent current circuit supplying a respective one of the consumers.
The advantage of this arrangement is that all the components, such as the power rectifiers, the storage elements, etc., are operated and powered uniformly, both a low and high mains voltages, thereby reducing the cost of manufacturing the voltage switch-over device.


REFERENCES:
patent: 4258304 (1981-03-01), Bourke
patent: 4268899 (1981-05-01), Rokas
patent: 4384321 (1983-05-01), Rippel
patent: 4827151 (1989-05-01), Okado
patent: 5088019 (1992-02-01), Williams et al.
patent: 5177677 (1993-01-01), Nakata et al.
patent: 5461297 (1995-10-01), Crawford
patent: 5568035 (1996-10-01), Kato et al.
patent: 5574635 (1996-11-01), Philippe
patent: 5675483 (1997-10-01), Rademaker et al.
patent: 5712774 (1998-01-01), Uramoto
patent: 5801931 (1998-09-01), Kino et al.
patent: 5969481 (1999-10-01), Konopka
patent: 6011704 (2000-01-01), Coleman
patent: 6087811 (2000-07-01), Crawford et al.
patent: 0 021 714 (1981-01-01), None
patent: 0 476 278 (1992-03-01), None

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