DD251217A1

DD251217A1 - CIRCUIT ARRANGEMENT FOR VOLTAGE REGULATION WITH THE HELP OF SEMICONDUCTOR COMPONENTS

Info

Publication number: DD251217A1
Application number: DD29014486A
Authority: DD
Inventors: Roland Kohlik
Original assignee: Numerik Karl Marx Veb
Priority date: 1986-05-12
Filing date: 1986-05-12
Publication date: 1987-11-04

Abstract

Die Erfindung betrifft eine Schaltungsanordnung zur Spannungsregulierung mit Hilfe von Halbleiterbauelementen und bezieht sich auf das Gebiet der Regelung elektrischer Groessen. Ziel der Erfindung ist es, mit geringem Aufwand die stoerungsfreie Funktion der Anordnung zu gewaehrleisten. Durch die Erfindung wird die technische Aufgabe geloest, eine Schaltungsanordnung zur Spannungsregulierung mit Hilfe von Halbleiterbauelementen zu schaffen, die einen aus einer Speicherdrossel, einer Freilaufdiode und einem Kondensator bestehenden Flusswandler enthaelt, und an deren Ausgang eine von Stoersignalen freie Ausgangsspannung vorhanden ist. Das Wesen der Erfindung besteht darin, dass sich zwischen der Freilaufdiode (1) und der Masseleitung (0) und parallel zu der bereits vorhandenen, aus der Speicherdrossel (4) und dem ersten Kondensator (5) aufgebauten LC-Kombination (45) ein Resonanzkreis (23) befindet. Dieser Resonanzkreis ist vorteilhafterweise als LC-Parallelresonanzkreis unter Verwendung einer Induktivitaet (3) und eines zweiten Kondensators (2) ausgebildet. Moegliche Anwendungsgebiete der in Fig. 1 am besten dargestellen Erfindung sind Stromversorgungseinheiten fuer numerische Steuerungen. Fig. 1The invention relates to a circuit arrangement for voltage regulation by means of semiconductor devices and relates to the field of electrical quantity control. The aim of the invention is to ensure the trouble-free operation of the arrangement with little effort. The invention solves the technical problem of providing a circuit arrangement for voltage regulation with the aid of semiconductor components, which contains a flux converter consisting of a storage inductor, a freewheeling diode and a capacitor, and at the output of which an output voltage free of interference signals is present. The essence of the invention is that between the freewheeling diode (1) and the ground line (0) and parallel to the already existing, from the storage inductor (4) and the first capacitor (5) built LC combination (45), a resonant circuit (23). This resonant circuit is advantageously designed as an LC parallel resonant circuit using an inductor (3) and a second capacitor (2). Possible fields of application of the invention best illustrated in FIG. 1 are power supply units for numerical control systems. Fig. 1

Description

In Fig. 1 ist der Teil der Schaltungsanordnung zur Spannungsregulierung dargestellt, der zum Beseitigen von Störungen in der erzeugten Ausgangsspannung dient. Zwischen der Potentialleitung PL liegen eine Freilaufdiode 1 und ein Resonanzkreis 23, der aus der Parallelschaltung eines ersten Kondensators 2 und einer induktivität 3 gebildet wird, in Reihe. Im Anschluß daran enthält die Schaltung ein Siebglied, das als LC-Kombination 45 ausgeführt ist. Dazu befinden sich in der Potentialleitung PL die Speicherdrossel 4 und zwischen der Potentialleitung PL und der Masseleitung (0) ein zweiter Kondensator (5). Fig. 2 enthält eine Darstellung der Verläufe der erzeugten Ausgangsspannung ohne (a) und unter (b) Anwendung der erfindungsgemäßen Lösung, wobei das Beseitigen von Eigenschwingungen in der Schaltungsanordnung zur Spannungsregulierung deutlich zu erkennen istIn Fig. 1, the part of the voltage regulation circuit is shown which serves to eliminate disturbances in the generated output voltage. Between the potential line PL are a freewheeling diode 1 and a resonant circuit 23, which is formed from the parallel connection of a first capacitor 2 and an inductance 3, in series. Subsequently, the circuit includes a sieve member, which is designed as an LC combination 45. For this purpose, the storage inductor 4 is located in the potential line PL and a second capacitor (5) is located between the potential line PL and the ground line (0). Fig. 2 contains a representation of the curves of the generated output voltage without (a) and under (b) application of the solution according to the invention, wherein the elimination of natural oscillations in the circuit arrangement for voltage regulation is clearly visible

Die erfindungsgemäße Lösung arbeitet auf folgende Weise. The solution according to the invention operates in the following way.

Entsprechend der bekannten Fluß-Wandler-Anordnungen sind in der erfindungsgemäßen Lösung die Freilaufdiode 1, die Speicherdrossel 4 und der erste Kondensator 5 eingesetzt. Weiterhin wirken die Induktivität 3 und die Kapazität 2 als ein LC-Parallel-Resonanzkreis 23 zur Sperrung der Eigenresonanz der Schaltungsanordnung zur Spannungsregulierung mit Hilfe von Halbleiterelementen. Bei Abschaltung des nicht dargestellten Wandlertransistors entsteht bei dieser Anordnung eine Spannungsspitze in der Freilaufdiode 1, die das System Wandlertransistor-Speicherdrossel 4 — Ausgangskapazität 5 und Freilaufdiode 1 zu Schwingungen anregt. Durch Untersuchungen kann man feststellen daß es sich, wie aus Fig. 2 a ersichtlich, im wesentlichen um gedämpfte, harmonische Schwingungen handelt.According to the known flux converter arrangements, the free-wheeling diode 1, the storage choke 4 and the first capacitor 5 are used in the solution according to the invention. Furthermore, the inductance 3 and the capacitance 2 act as an LC parallel resonance circuit 23 for blocking the self-resonance of the voltage regulation circuit arrangement with the aid of semiconductor elements. When switching off the converter transistor, not shown, arises in this arrangement, a voltage spike in the freewheeling diode 1, which excites the system converter transistor storage inductor 4 - output capacitance 5 and freewheeling diode 1 to vibrations. It can be ascertained by examinations that, as shown in FIG. 2 a, it is essentially a matter of damped, harmonic oscillations.

Nach dem Einschwingprozeß ist die Frequenz konstant und gleich der Resonanzfrequenz des Systems Wandlertransistor-Speicherdrossel 4— Ausgangskapazität 5 und Freiiaufdiode 1. Der verwendete LC-Kreis 23 unterdrückt die nach dem Einschwingen entstehenden Resonanzschwingungen und reduziert damit die ohne Verwendung des LC-Kreises 23 vorhandene Energie der Störimpulse um 80-90%. Aus Fig. 2 ist zu erkennen, daß der Schwingsvorgang ohne LC-Kreis 23 etwa 15 bis 30 Perioden und mit LC-Kreis 23 weniger als 5 Perioden enthält. Auf diese Verringerung der Periodenzahl beruht deshalb die Leistungsreduzierung der Störimpulse. Damit wird durch die erfindungsgemäße Schaltung eine Ausgangsspannung erzeugt, die frei von allen störenden Signalen gehalten wird.After the transient process, the frequency is constant and equal to the resonant frequency of the system converter transistor storage choke 4- output capacitance 5 and Freiiaufdiode 1. The used LC circuit 23 suppresses the resonant vibrations arising after settling and thus reduces the existing without the use of the LC circuit 23 energy the glitches by 80-90%. From Fig. 2 it can be seen that the oscillatory process without LC circuit 23 contains about 15 to 30 periods and with LC circuit 23 less than 5 periods. The power reduction of the interference pulses is therefore based on this reduction of the period number. Thus, an output voltage is generated by the circuit according to the invention, which is kept free of all interfering signals.

Claims

Circuit arrangement for voltage regulation with semiconductor components, comprising a flux converter consisting of a storage inductor, a freewheeling diode and a first capacitor, characterized in that between the freewheeling diode (1) and the ground line (0) and parallel to the from the storage inductor (4) and the first capacitor (5) constructed LC combination (45) from a parallel circuit of a second capacitor (2) and an inductance (3) existing resonant circuit (23) is located.

For this 1 page drawings

Field of application of the invention

The invention relates to the field of control of electrical quantities and their application is possible and expedient in power supply units for electronic numerical control.

Characteristic of the known technical solutions

In circuit arrangements for voltage regulation, it is necessary to provide a certain output voltage in response to an input voltage not only in the required size, but also free of interference of all kinds. For this purpose, from DE-OS 2220176; H 02 P13 / 22 a transistor switching regulator is known, which is characterized by an input voltage source, an inductive load switching element and further by a switching device, which are connected in series. With this arrangement it is achieved that almost the entire input voltage is applied to the inductive load circuit element and thereby only a small power is consumed in the transistors. The bias source operates the switching transistor in its off emitter state when turned off when the control transistor is disabled. Thereby, the control transistor is separated from the voltage magnitudes occurring at the inductive load circuit element, so that the switching transistor can be selected for its collector-base breakdown voltage characteristic. A voltage regulator according to DE-OS 22 20176 has a power transformer with a primary and secondary winding, wherein the primary winding operates as part of a consisting of the supply voltage and the switching element row driver circuit. The primary winding forms from the impressed AC voltage the time average, so that the voltage-time duration surfaces above and below a reference axis are the same. With a corresponding polarity of the primary and secondary windings, appears on the secondary winding a pulsating signal with a current flow in the direction opposite to the current flow in the primary winding opposite direction. A diode acting as a half-wave rectifier becomes conductive by current pulses in the secondary winding and supplies energy in a smoothing circuit formed by a coil and a capacitor. A flywheel diode forms a path for the current through the coil between said power pulses, and a resistor as part of the load circuit ensures that there is always a load even when unloaded. A first series circuit of a capacitor and a resistor or another of a resistor and a capacitor, each of which has a diode connected in parallel, serves to suppress high-frequency noise at the diodes. The disadvantage of this known circuit arrangement is the lack of effective measures against itself from the structure of the arrangement resulting interference, which are not eliminated despite the existing Siebmittel.

Object of the invention

It is the object of the invention to ensure, with little effort, the trouble-free functioning of a circuit arrangement for voltage regulation with the aid of semiconductor components.

Explanation of the essence of the invention

By the invention, the technical problem is solved to provide a circuit arrangement for voltage regulation by means of semiconductor devices, which contains a consisting of a storage inductor, a freewheeling diode and a capacitor flux converter, and at the output of a noise-free output voltage is present. The essence of the invention is that between the freewheeling diode and the ground line and parallel to the already existing, constructed from the storage inductor and the first capacitor LC combination, a resonant circuit is located. This resonant circuit is advantageously designed as an LC parallel resonant circuit using an inductor and a second capacitor.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing show

1 shows a part of the voltage regulation circuit,

FIG.

2: the representation of the output voltage curves without (a) and with (b) the resonant circuit.