Stabilized DC power supply devices for providing a plurality of DC power outputs which are selectively consumed
First Claim
1. A stabilized DC power supply device for providing a plurality of DC power outputs which are selectively consumed, comprising:
- a DC power source;
a single power control means coupled to said DC power source and providing high frequency AC outputs with controlled powers from said DC power source, said power control means comprising a DC-AC inverter circuit and means for receiving a control signal and controlling powers of the AC outputs from said DC-AC inverter circuit, said DC-AC inverter circuit including an inverter transformer having a plurality of secondary windings, from each of which a high frequency AC output with a predetermined voltage is taken out;
a plurality of rectifier circuit means coupled to said plurality of secondary windings to respectively rectify said high frequency AC outputs present on said secondary windings;
a plurality of low pass filter circuit means coupled to said plurality of rectifier circuit means to remove ripples from outputs of said rectifier circuit means and to provide said plurality of DC outputs with predetermined voltages to output lines, respectively;
a plurality of reference voltage sources, each reference voltage of which is predetermined in relation to said predetermined voltage of each corresponding one of said plurality of DC outputs;
a plurlaity of voltage sensing means for sensing voltages of said plurality of DC outputs respectively;
a plurality of voltage comparator means, each of which compares the reference voltage of each one of said reference voltage sources with the sensed voltage by a corresponding one of said voltage sensing means to provide an error signal, output voltages of said voltage comparator means being equal to one another when said plurality of DC outputs are maintained at said predetermined voltages;
means for detecting a DC output which is being consumed by comparing output voltages of said voltage comparator means to one another and for applying the error signal from one of said voltage comparator means corresponding to said detected DC output to a control signal generator means;
and said control signal generator means for providing said control signal from said applied error signal to control powers of said AC outputs from said power control means so that the voltage of said detected DC output is regulated to its predetermined voltage.
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Abstract
A stabilized DC power outputs supply devices for providing a plurality of DC power outputs which are selectively consumed, is provided by use of a single power control circuit. A plurality of DC power outputs are taken out from the single power control circuit through rectifier circuits and low-pass filter circuits. A voltage of each of the DC power outputs is sensed by a corresponding voltage sensing circuit and is compared with a corresponding reference voltage at a corresponding voltage comparing circuit. Detecting circuits for detecting one of the DC power outputs which is being consumed are provided to apply to a control signal generator the output of one of the comparing circuits which is corresponding to the DC power output detected by the detecting circuits. The control signal generator provides a control signal to the single power control circuit to stabilize the voltage of the DC output which is being consumed.
13 Citations
15 Claims
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1. A stabilized DC power supply device for providing a plurality of DC power outputs which are selectively consumed, comprising:
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a DC power source; a single power control means coupled to said DC power source and providing high frequency AC outputs with controlled powers from said DC power source, said power control means comprising a DC-AC inverter circuit and means for receiving a control signal and controlling powers of the AC outputs from said DC-AC inverter circuit, said DC-AC inverter circuit including an inverter transformer having a plurality of secondary windings, from each of which a high frequency AC output with a predetermined voltage is taken out; a plurality of rectifier circuit means coupled to said plurality of secondary windings to respectively rectify said high frequency AC outputs present on said secondary windings; a plurality of low pass filter circuit means coupled to said plurality of rectifier circuit means to remove ripples from outputs of said rectifier circuit means and to provide said plurality of DC outputs with predetermined voltages to output lines, respectively; a plurality of reference voltage sources, each reference voltage of which is predetermined in relation to said predetermined voltage of each corresponding one of said plurality of DC outputs; a plurlaity of voltage sensing means for sensing voltages of said plurality of DC outputs respectively; a plurality of voltage comparator means, each of which compares the reference voltage of each one of said reference voltage sources with the sensed voltage by a corresponding one of said voltage sensing means to provide an error signal, output voltages of said voltage comparator means being equal to one another when said plurality of DC outputs are maintained at said predetermined voltages; means for detecting a DC output which is being consumed by comparing output voltages of said voltage comparator means to one another and for applying the error signal from one of said voltage comparator means corresponding to said detected DC output to a control signal generator means; and said control signal generator means for providing said control signal from said applied error signal to control powers of said AC outputs from said power control means so that the voltage of said detected DC output is regulated to its predetermined voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A stabilized DC power supply device for providing two DC power outputs which are selectively consumed, comprising:
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a DC power source; a single power control means coupled to said DC power source and providing high frequency AC outputs with controlled powers from said DC power source, said power control means comprising a DC-AC inverter circuit and means for receiving a control signal and controlling powers of the AC outputs from said DC-AC inverter circuit, said DC-AC inverter circuit including an inverter transformer having a plurality of secondary windings, from each of which a high frequency AC output with a predetermined voltage is taken out; a plurality of rectifier circuit means coupled to said plurality of secondary windings to respectively rectify said high frequency AC outputs present on said secondary windings; a plurality of low pass filter circuit means coupled to said plurality of rectifier circuit means to remove ripples from outputs of said rectifier circuit means and to provide said DC outputs with predetermined positive and negative voltages respectively and commonly using a zero potential line; a plurality of reference voltage sources, each reference voltage of which is predetermined in relation to said predetermined voltage of each corresponding one of said DC outputs; a plurality of voltage sensing means for sensing voltages of said DC outputs respectively; a plurality of voltage comparator means, each of which compares the reference voltage of each one of said reference voltage sources with the sensed voltage by a corresponding one of said voltage sensing means to provide an error signal; means for detecting a DC output which is being consumed and for applying the error signal from one of said voltage comparator means corresponding to said detected DC output to a control signal generator means; with said control signal generator means providing said control signal from said applied error signal to control powers of said AC outputs from said power control means so that the voltage of said detected DC output is regulated to its predetermined voltage; and with said means for detecting a DC output which is being consumed comprising first means for providing either one of positive or negative voltage depending on which of said two DC outputs is being consumed, second means for providing either one of a high positive or negative voltage in response to the output voltage of said first means, third means for permitting only one of said sensed voltages to be inputted to a corresponding one of said voltage comparator means in response to the output of said second means, and fourth means for detecting the output from said corresponding one of said voltage comparator means to apply the detected output as an error signal to said control signal generator means. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification