Geregelte Stromversorgungseinheit mit einem elektronischen Transformator

摘要

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.