SU783930A1 - Series-parallel inverter for power supply of inductor - Google Patents

Description

  - ..

The invention relates to power converter technology.

When termamagia processing permanent magnets using the induction method of heating the energy of the liver, the constant component of the field of the inductor is the constant component of the inductor current.

The well-known 1 inverter inverter, the inductor ycTpoftcTBSi of induction heating, creates in the inductor an alternating current without a constant component.

Such an inverter is the closest to the invention and contains a converter cell on controllable valves, the output circuit of which is connected to the output drives.

The disrupter’s fault is the inability to create a constant current of the inductor current.

The aim of the invention is to extend the functionality by creating a constant component of the inductor current. „

The goal is achieved by the fact that the S-series M11 inverter for powering the inductor, containing a converter cell connected to the inputs through the filter choke on controllable valves, whose output circuit is connected to the output terminals, is equipped with a series of chokes and a diode connected in parallel output pins.

The inverter circuit is presented on

figure 1.

Figure 2 presents time diagrams of currents and voltages that explain the occurrence of a constant component of an inductor current when a voltage is applied on an inductor close in shape to a sinusoidal one and used in a diode circuit.

The inverter contains 1 controlled valves (thyristors) 2-5, a series capacitor b, a parallel uranium compensator, a capacitor 7, an inductor-8, a series circuit of g | donkey 9 and diode 10.

Inverter works as follows.

When pairing thyristors 2, 4 and 3, 5 in the load circuit, an alternating current flows on the Inductor and a voltage of -1 is generated. When a series string is connected, a single-pole current will flow through it, since

iodine. This means that a constant current will flow through the chain, and a constant current of the inductor arises. dGHe1RyKYa (e: gyo there is also a constant voltage across the inductive voltage, but the magnitude of this constant compared with the amplitude of the variable component of the voltage on the inductor is very maya, since the voltage of the inductor at the voltage of the inductor is very high.

On fi1.2 bboznacheno:. ; -Uuh - amplitude voltage on indukrit titf - - ..

; Thor;

 constant current component of the inductor;

the amplitude of the variable composition of the INA. The current of the alternating current is idukhor and the single component of the current / S3 of the chain; : ifT

Ash current variable component of the current:; .. When the constant component of current is equal to zero i 2. fairness.

CCP MMAiJcp;

From figure 2 it is seen that Zs, cf-3 CLT

Thus, the connection chain,

ki consisting of connected after-j

Behavior cattush1 "th inductance"

d1SHCHA shepherd the appearance of the poet

current component —Guard - -:

t - jjvtHA.T. ..T- is;., 1;

-, .t

where is the induction coil inductance of the chain; . Ill is the circular frequency of the voltage across the inductor.

in the case of application in the thyristor chain, the value of the constant composition is (the short of the current of the inductor (it should be changed by changing the thyristor turn-on delay in relation to

moment of inductor voltage transfer

WELL ZERO ..

Claims (2)

Invention Formula A series-parallel inverter for supplying an ididor containing a converter cell connected to the input terminals via a filter choke on controlled valves, the output circuit of which is connected to the output terminals, characterized in that, in order to extend the functionality by creating a constant component the current of the inductor, it is supplied. wiring a serial chain of Drossel and a diode connected in parallel-. but output pins. ,. „;. g.  Sources of information 4pcd, taken into account in the examination / 1. Berkovich.N. I., Ivensky G.V., / Joffe I.I. Thyristor transforms; high frequency telephones L., Energie, 1973, pp. 35, fig. .3-5 .. 2. Porhacheva N.V., Shekalov A.A. Application of induction heating in thermomagitic processing of permanent magnets. Electrical industry, ser. Electrical Materials, 1977, Issue 3 iCeo), p. 8-9 (about totype) .. i /. liu / fff 9 . BUT -f &. 40 j) lHG ind.t