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US 5,729,445 AGranted
Regulated power supply unit with an electronic transformer
AssigneeLeica Mikroskopie und Systeme GmbH
InventorDieter Huelsmann
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AssigneeLeica Mikroskopie und Systeme GmbH
InventorDieter Huelsmann
Estimating the term…
A regulated power supply unit with an electronic transformer having an input for a transformer power supply voltage on the primary side, an output for an operating a.c. voltage with a higher-frequency component on the secondary side, and a control device with a variable resistor by means of which the operating a.c. voltage may be set. There is an inductive or capacitive separator component by means of which the higher-frequency component of the operating a.c. voltage can be separated out and taken as the input voltage to a first and a second rectifier circuit. The output voltage of the first rectifier circuit is applied to an amplifier-comparator circuit as its supply voltage. A reference generator circuit is connected to the first rectifier circuit and to the amplifier-comparator circuit. A reference for the operating a.c. voltage can be set by the reference generator circuit. An actual value is derived from the output voltage of the second rectifier circuit and taken to the amplifier-comparator circuit, at the output of which an error signal may be taken. A transistor constitutes the variable resistor and is controlled by the error signal from the amplifier-comparator circuit.
Regulated power supply unit with an "electronic transformer", which comprises an input on the primary side for a transformer supply voltage, an output on the secondary side for an AC operating voltage, which has a higher-frequency component, for a load, and a control device having a variable resistance element, by means of which the AC operating voltage can be adjusted, characterized by an inductive or capacitive output element (3), by means of which the higher-frequency component of the AC operating voltage can be output, the higher frequency component being supplied as the input voltage to in each case one first rectifier circuit (4) and one second rectifier circuit (5), an amplifier-comparator circuit (9), to which the output voltage of the first rectifier circuit (4) is applied, after smoothing, as its supply voltage, and a reference value generator circuit (8) which is connected to the first rectifier circuit (4) and to the amplifier-comparator circuit (9) and by means of which a reference value for the AC operating voltage can be adjusted, and an actual value being derived from the output voltage of the second rectifier circuit (5) and being supplied to the amplifier-comparator circuit (9), at whose output an error signal can be picked off, and a transistor (10) which forms the variable resistance element and is driven by the error signal from the amplifier-comparator circuit (9).
A regulated power supply unit for an electronic transformer which has an input on a primary side for a transformer supply voltage, an output on a secondary side for a load, the output providing an AC operating voltage that has a higher-frequency component, and a control device having a variable resistance element to adjust the AC operating voltage, the regulated power supply unit comprising:
Dependencies are inferred from the claim text.