SU1131016A1 - Device for adjusting static converter - Google Patents

Abstract

DEVICE TO CONTROL static converter, comprising: a master oscillator and driver control pulses rectifiers transducer, characterized in that, for the purpose of simplification, it syabzheno generator sinusoidal voltage phase shifter unit and transformer to trehsterzhnevym core and two primary and three secondary windings, wherein one primary winding is made in the form of two sections with the same number of turns connected in series-opposite and located on the outermost rods x core, and connected to the output of a sinusoidal voltage shaper, whose input is connected to the output of the master oscillator, the second primary winding placed on the middle core of the core, is made with the number of BHTKqB times the number of turns of the first primary winding and connected to the phase shifting output a unit whose input is under (L is key to the output of a sinusoidal signal shaper, and some of the secondary windings of the same name .. the transformer are combined into a common point, while others are connected to the shaper inputs control pulses.

Description

ABOUT)

The invention relates to electrical engineering and can be used in particular to control a static converter with an explicit DC link to obtain a W-phase output voltage.

Devices for controlling static voltage converters with a pronounced DC link are known, comprising a control system including a master oscillator and output generators-amplifiers ij.

The disadvantage of these devices is the complexity of the output generator-amplifier unit of the control system, low operational reliability.

The closest in technical essence to the present invention is a device for controlling a static converter comprising a master oscillator and a driver for controlling the gates of the valves of the converter 2j.

The disadvantages of the known converter are the complexity of the pulse generator, control, due to the presence of a sufficiently large number of resistors, capacitors, semiconductors, elements, transformers, and the resulting low reliability of the driver;

The aim of the invention is to simplify and improve reliability. I

The goal is achieved by the fact that the device for controlling a static converter containing a master oscillator and a pulse-shaper control of converter gates is equipped with a sinusoidal voltage shaper, a phase-shifting unit and a U-rod core transformer and two primary and three secondary windings, and one primary winding with a single winding core. two sections with the same number. turns connected in series and located on the extreme cores of the core, and connected to the output of a sinusoidal voltage driver, whose input is connected to the output of the master oscillator, the second primary winding placed on the middle core of the core, is made with the number of turns

a large number of turns of the first perimeter winding and connected to the output of the phase-shifting unit, the input of which is connected to the output of the sinusoidal signal generator, and one of the like conclusions of the secondary windings of the transformer are combined into a common point, and the others are connected to the inputs of the pulse shaper

0 control

The drawing shows a functional diagram of a device for controlling a static converter. A device for controlling a static converter, including rectifier 1, connected to inverter 2, supplying load 3 ,. contains master oscillator 4, powered by rectifier 1 and connected

0 to the sinusoidal shaper on. yarn 5, the output of which is connected to the two-section primary winding 6 of Transformer 7 directly, and to the other primary winding 8 through

5 phase-shifting unit 9. Sections of the primary winding 6 are interconnected counter-sequentially, and the primary winding 8 is made with the number of turns more times than the number of turns of the winding 6. The secondary windings 10 of the transformer 7 are connected to the common point with the same ends connected to the inputs of the pulse shaper control 11 valves of the inverter 2.

The device works in the following way.

When connecting the power top of the Itel I to cetH, the master oscillator 4 is powered, generating a series of rectangular waveforms of different polarities of the required frequency, fed to the input of the sinusoidal voltage driver 5, from which the first input winding 6 of the transformer 7 is fed winding 8 is powered by a sinusoidal voltage shifted

by the angle It / 2 through the phase-shifting unit 9, the magnetic fluxes of the primary windings 6, 8 induce a symmetric m-phase Sinusoidal EMF in the secondary windings 1Q, the former 11 converts the sinusoidal voltages of the windings 10 to the output rectangular pulses that feed the basic control circuits of the saw 3 inverter conductor valves 2. Thus, due to the simpler execution of the control pulse generator 11310164; (Improving the reliability of the converter control unit device is achieved.

Claims (1)

DEVICE FOR CONTROL OF A STATIC CONVERTER, containing a master oscillator and a pulse generator of control valves of the converter, characterized in that, in order to simplify it, it is equipped with a sinusoidal voltage generator, a phase-shifting unit and a transformer with a three-core core and two primary and three secondary ones the primary winding is made in the form of two sections with the same number of turns, soybean. dyne series-opposite and located on the extreme rods of the core, and connected to the output of the sinusoidal voltage generator, the input of which is connected to the output of the master oscillator, the second primary winding located on the middle core rod is made with the number of turns many times the number of turns of the first primary winding and connected to the output of the phase-shifting unit, the input of which is connected to the output of the sine wave shaper, and the same outputs of the secondary windings of the same name .. · transformer combined to a common point, and the other connected to the inputs. ^with a pulse shaper control. shotshot