Voltage level control for d. c.-to-d. c. converter专利检索-升压转换器开关控制器电子功率变换器变压器和转换设备专利检索查询-专利查询网

Voltage level control for d. c.-to-d. c. converter

阅读：955发布：2023-11-24

专利汇可以提供Voltage level control for d. c.-to-d. c. converter专利检索，专利查询，专利分析的服务。并且A D.C.-to-D.C. converter that employs a current switch chopper with the collectors of two switching transistors feeding opposite ends of a primary of a step up transformer. The transformer has a secondary which resonantly feeds back voltage to the bases of the two switching transistors for converting the voltage from D.C. to A.C. and includes floating comparator means sensing the voltage at the collectors of these transistors to regulate the magnitude of the voltage by comparing that voltage with a reference voltage and then readjusting the current supplied to the floating emitters of the two switching transistors by a third transistor.，下面是Voltage level control for d. c.-to-d. c. converter专利的具体信息内容。

权利要求

1. A D.C.-to-D.C. converter for receiving an input voltage at one potential from a two terminal source of input voltage and supplying an output voltage at another potential comprising: a resonant transformer having a center tapped primary winding coupled to one terminal of the source of input potential and at least one secondary winding; a current switch with three transistors, two of the transistors being switching transistors with their collectors connected to opposite ends of the center tapped primary winding to supply current to the primary winding, their emitters coupled together and floating with respect to both terminals of said sources of input voltage and their bases being coupled to the mentioned secondary winding to receive voltages therefrom and cause the two switching transistors to operate in class C mode of operation and the third transistor serving as a current source for the two switching transistors with its collector connected to the emitters of the two switching transistors and its emitter coupled to the other terminal of the source of the input voltage so that said other terminal functions as a ground terminal for the D.C.-to-D.C. converter; and control means for regulating the output voltage of the converter including: differential sensing means floating on the potential at the center tap of the transformer for comparing the voltage between the center tap and at least one end of the primary winding to a fixed voltage and for providing an output voltage indicative of the difference in potential between the two compared voltages; and control transistor means coupling the output of the differential amplifier to the base of the third transistor to control the magnitude of the current through the third transistor as a function of said output, said control transistor means including means for referencing the output voltage of said differential amplifier to ground potential for the D.C.-to-D.C. converter.

2. The D.C.-to-D.C. converter of claim 1 wherein said differential sensing means includes full wave rectifying means for rectifying the voltage across both halves of the center tapped primary and providing a D.C. voltage indicative of voltage across both halves; a differential amplifier means having two transistors with their emitters coupled together and a D.C. current source connected in series with the collector to emitter paths of both the transistors across the output of said rectifying means; voltage divider means connected across the output of said rectifying means and to the base of one of the transistors in the differential amplifier for providing an input signal to said differential amplifier; zener diode means coupled across the output of the rectifying means and to the base of the other of the transistors in the differential amplifier to provide the fixed voltage to the emitter of the other transistor in the differential amplifier means; and output means at the collector of the other transistor in the differential amplifier for providing said output voltage of the differential sensing means.

3. The D.C.-to-D.C. converter of claim 2 including: a high impedance current source in shunt with the third transistor; and means for operating the high impedance current source when voltage is initially applied by tHe voltage source.

4. The D.C.-to-D.C. converter of claim 3 including: means for switching off said third transistor when current through said third transistor exceeds a desired maximum.

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Voltage level control for d. c.-to-d. c. converter

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