Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1990-04-23
1993-02-16
Stephan, Steven L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
363 59, 307108, 307109, 307110, H02M 307
Patent
active
051874210
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to electrostatic transformers and more particularly to an electrostatic transformer capable of electrically insulating the input and output sides thereof from each other without using any transformer.
BACKGROUND ART
Generally, an conventional electrical machine or apparatus uses a transformer the primary and secondary sides of which are electrically insulated from each other.
In a electrical machine or apparatus using such a transformer, the input and output sides of the transformer is electrically insulated, so that if, for example, a commercial power source having one end grounded is connected to the primary side of the transformer, there are no danger of a short circuit and electrical shocks even if any of the secondary side terminals is grounded. Therefore, such power source is usable as one of various power sources, but it includes the transformer, so that the machine or apparatus is weighty and expensive, induced noise would occur, etc., disadvantageously.
The present invention has been made in order to solve such subject of the prior art. It is an object of the present invention to provide an inexpensive electrostatic transformer which is capable of reducing the weight of a device such as an electrical machine or apparatus without using any transformer and which produces no induction noise.
DISCLOSURE OF THE INVENTION
An electrostatic transformer according to the present invention is characterized in that one of input terminals is connected to one terminal of a first capacitor directly or via a diode and a first switch while the other of the input terminals is connected to the other terminal of the first capacitor via a switch opened and closed simultaneously with the opening and closing operations of the first switch in interlock with same, and both the terminals of the first capacitor are connected to corresponding output terminals directly or to corresponding terminals of a second capacitor via a second switch closed and opened simultaneously with the opening and closing operations, respectively, of the first switch in interlock with same and via a switch closed and opened simultaneously with the closing and opening operations, respectively, of the second switch in interlock with same.
The electrostatic transformer according to the present invention is characterized in that one of input terminals is connected to one terminal of a first capacitor directly or via a diode and a first switch while the other of the input terminals is connected to the other terminal of the first capacitor via a switch opened and closed simultaneously with the opening and closing operations of the first switch in interlock with same, and both the terminals of the first capacitor are connected to corresponding terminals of a second capacitor via a second switch closed and opened simultaneously with the opening and closing operations, respectively, of the first switch in interlock with same and via a switch closed and opened simultaneously with the closing and opening operations, respectively, of the second switch in interlock with same, and both the terminals of the second capacitor are connected to the corresponding output terminals.
As described above, in the inventive electrostatic transformer, the output terminals a and b are respectively connected to the input terminals A and B via the first and second switches S.sub.1 and S.sub.2 and switches S.sub.1 ' and S.sub.2 '. When one of these switches is closed, the other is opened, so that the input terminals A and B are completely isolated at all times from the output terminals A and B. Therefore, if, for example, a commercial power source having one end being grounded is connected across the input terminals A and B, there occurs no short circuit even if any one of the output terminals a and b is grounded to thereby achieve the intended object.
As just described above, according to the present invention, an inexpensive electrostatic transformer is obtained which electrically insulates the input and output sides thereof
REFERENCES:
patent: 3091479 (1962-06-01), Sikorra
patent: 3596369 (1971-08-01), Dickerson
patent: 3868560 (1975-02-01), Hoffman
patent: 4616303 (1986-10-01), Mauthe
patent: 4689734 (1987-08-01), Lang
patent: 4807104 (1989-02-01), Floyd et al.
patent: 4965711 (1990-10-01), Kamp et al.
patent: 5051881 (1991-09-01), Herald
Dougherty Thomas M.
Kabushiki Kaisha ENU-ESU
Stephan Steven L.
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