Battery charger device
First Claim
1. A battery charger device for connection to an A.C. power source comprising, an integrator circuit having a D.C. power source, a voltage comparator having at least a first and a second input terminal and an output terminal, a solid state relay circuit, a D.C. output circuit, a positive voltage feedback circuit, and a negative voltage feedback circuit;
- said integrator circuit having a full wave rectifier for rectifying A.C. power from said A.C. power source, said integrator circuit processing said A.C. power to form an impulse wave from said A.C. power which is further processed by said integrator circuit to form a synchronous triangular wave which is directly transmitted to said first input terminal of the voltage comparator;
said voltage comparator being responsive to said triangular wave transmitted by said integrator circuit and being further responsive to a D.C. voltage output from said negative voltage feedback circuit and transmitted to said second input terminal so as to provide a synchronous square wave output at said output terminal, said square wave having a temporal width which is changed subject to the magnitude of said D.C. voltage on said second input terminal, and said D.C. voltage magnitude being subject to change in the same manner as determined by said positive voltage feedback circuit, said square wave output from said voltage comparator being directly coupled with a photo coupler of said solid state relay circuit;
said solid state relay circuit comprising, a second full wave rectifier for rectifying said A.C. power for the performance of synchronous conduction with said synchronous square wave to thereby provide a synchronous conduction voltage which is then transmitted to said D.C. output circuit by means of direct coupling;
said D.C. output circuit filtering said synchronous conduction voltage from said solid state relay circuit so as to provide a second D.C. voltage, and a voltage containing a certain angle of sine wave function hence formed on an output terminal of said D.C. output circuit by using a voltage regulation method, said output terminal of said D.C. output circuit defining a sampling voltage point which is connected to an input terminal of said positive voltage feedback circuit and negative voltage feedback circuit said D.C. output circuit being coupled to said positive voltage feedback circuit and negative voltage feedback circuit;
said positive voltage feedback circuit, sampling said voltage at the sampling voltage point of the D.C. output circuit formed as a basis for advancing said D.C. voltage output to the second input terminal of the voltage comparator, said positive voltage feedback circuit having a photo coupling means between an output terminal of said positive voltage feedback circuit and said voltage comparator;
said negative voltage feedback circuit, sampling said voltage at the sampling voltage point of the D.C. output circuit formed as a basis for reducing said D.C. voltage output to the second input terminal of the voltage comparator, said negative voltage feedback circuit having a photo coupling means between an output terminal of said negative voltage feedback circuit and said voltage comparator.
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Accused Products
Abstract
A battery charging device capable of charging any variety of rechargeable batteries and capable of being powered by either a 110 volt or a 220 volt A.C. power source. The battery charging device comprises an integrator circuit having a D.C. power source; a voltage comparator; a solid state relay; a D.C. output circuit; a positive voltage feedback circuit; and a negative voltage feedback circuit. The integrator circuit receives A.C. power from an A.C. power source and provides an output to the voltage comparator. The voltage comparator, in turn, is connected so as to provide an output to the solid state relay. The solid state relay preferably includes a zero voltage closing circuit and provides an output to the D.C. output circuit. The D.C. output circuit is connected to a battery-to-be-charged and provides an output D.C. voltage thereto. The D.C. output circuit is also connected to and provides outputs to the negative and positive feedback circuits which, in turn, provide feedback to the voltage comparator. Preferably, optical coupling devices connect the output from the voltage comparator to the solid state relay, as well as the positive and negative feedback circuits to the voltage comparator.
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Citations
9 Claims
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1. A battery charger device for connection to an A.C. power source comprising, an integrator circuit having a D.C. power source, a voltage comparator having at least a first and a second input terminal and an output terminal, a solid state relay circuit, a D.C. output circuit, a positive voltage feedback circuit, and a negative voltage feedback circuit;
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said integrator circuit having a full wave rectifier for rectifying A.C. power from said A.C. power source, said integrator circuit processing said A.C. power to form an impulse wave from said A.C. power which is further processed by said integrator circuit to form a synchronous triangular wave which is directly transmitted to said first input terminal of the voltage comparator; said voltage comparator being responsive to said triangular wave transmitted by said integrator circuit and being further responsive to a D.C. voltage output from said negative voltage feedback circuit and transmitted to said second input terminal so as to provide a synchronous square wave output at said output terminal, said square wave having a temporal width which is changed subject to the magnitude of said D.C. voltage on said second input terminal, and said D.C. voltage magnitude being subject to change in the same manner as determined by said positive voltage feedback circuit, said square wave output from said voltage comparator being directly coupled with a photo coupler of said solid state relay circuit; said solid state relay circuit comprising, a second full wave rectifier for rectifying said A.C. power for the performance of synchronous conduction with said synchronous square wave to thereby provide a synchronous conduction voltage which is then transmitted to said D.C. output circuit by means of direct coupling; said D.C. output circuit filtering said synchronous conduction voltage from said solid state relay circuit so as to provide a second D.C. voltage, and a voltage containing a certain angle of sine wave function hence formed on an output terminal of said D.C. output circuit by using a voltage regulation method, said output terminal of said D.C. output circuit defining a sampling voltage point which is connected to an input terminal of said positive voltage feedback circuit and negative voltage feedback circuit said D.C. output circuit being coupled to said positive voltage feedback circuit and negative voltage feedback circuit; said positive voltage feedback circuit, sampling said voltage at the sampling voltage point of the D.C. output circuit formed as a basis for advancing said D.C. voltage output to the second input terminal of the voltage comparator, said positive voltage feedback circuit having a photo coupling means between an output terminal of said positive voltage feedback circuit and said voltage comparator; said negative voltage feedback circuit, sampling said voltage at the sampling voltage point of the D.C. output circuit formed as a basis for reducing said D.C. voltage output to the second input terminal of the voltage comparator, said negative voltage feedback circuit having a photo coupling means between an output terminal of said negative voltage feedback circuit and said voltage comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification