DE1816149C - Rectifier circuit with LC filter circuit - Google Patents

Description

Obtains power supply units fed from the AC network.

for direct current consumers contain rectifier Compliance with the rating rule that the

circuits that are generally the same as the consumer bridge circuit, e.g. a full wave rectification of the cherwiderstand is not particularly critical, so that Cause alternating current. To smooth out the 40 slight changes in the bar during operation commutated current to the rectifier will only change the unreal input impedance insignificantly, indirectly at the rectifier output filter circuits In the case of larger load changes the circuit can be used. Filter circuits can advantageously be expanded from one or more circuits in such a way that The ohmic resistance in the alternating current path contributes to more longitudinal inductances and transverse capacitances and either a capacitor change or a 45 load change concurrently with the consumer choke input exhibit. The reactances the resistance is changeable.

Filter circuits cause a distortion of the input The adaptation to the consumer resistance

output current. In relation to a sinusoidal input, it can be mechanically controlled by switching contacts or by means of output voltage, can be electronically controlled in the filter circuit with an auxiliary circuit, a charging capacitor (capacitor input) . 1 and 2 explained in more detail. In
mene reactive power must be many times greater than F i g. 1 is an adapted equalization circuit

with a filter circuit with a throttle input, but with a filter circuit that has a throttle input also a considerable amount of distortion. has, shown in principle; in
This property of the rectifier circuit with 55 F i g. 2 is the dependence of the form factor ξ of the filter circuit can in various cases have a very negative effect on the input current and the efficiency η. Circuit of the resistance ratio R _A / R at

When rectifying the voltage represented by an alternating sinusoidal input voltage,
rectifier supplied, rectangular AC voltage

The switching transistors with the high 60 input voltage U ₁ ; z. B. supplied from an alternating ■ ~ J * charging current especially at the moment of the inrush current network. The rectification of the Wechtens when the capacitor is still discharged is loaded, selvoltage takes place in a bridge circuit Gr when the filter circuit has a condensate input (Graetz circuit). In place of the bridge shawl. any other equalization circuit can also be used ι · ;;; -

Current distortions are also found in alternating 65, as well as between the alternating current network and. ~ "i ~ remote power supply from intermediate amplifiers in the rectifier a transformer switched on) £

Message transmission systems disadvantageous, as this can be. The consumer resistance R _A is via some of the line resistances distorted input- the filter choke L to the output of the bridge- i.,

This dependency is shown τ υ- 7.

circuit connected. In parallel with the rectifier current, in r ¹ Br * " ^ _{1 β} condition .R _A = £ a ^ gang The series connection consists of the ohmic How ^ ^era ^ Stenzu become, if slight ^ resistance«, which is the same as the cons - not strictly «J ^ SSl stand of the consumer R _A must be, with the con- § ^ ^ωνεΐζε Ξ? Κ, 3Τ L Standing power loss capacitor C While <fie SJebdrosseT L in series with 5 Die in W" * ⁶ * ^ * form factor the input resistor K ₄ reduces the current path for ach mn J »*. _Square- shaped ends from the commutated current half-wave voltage. When a j »^ _{ώβ56 represents sampling} power on the average direct current value, the differential voltage {β Ί ^ Τ inverters-stored alternating current of the current half-waves flows via the NuH. in practice si ™ * _ideai ^^^^ jö ^ PaVaUelzweig, consisting of the series circuit R, 10 supplied Aosgan ^ panmu «^ ^ ₀ ^^ _darch C. If the series resistance Λ and the verlaun" V ^ "^ g ^ switchgear consumer resistanceÄ _A exactly above, then the ^U ^^^ ₍ ^ T _F XS changes the adapted equalization of the input current as with an ohmic one. Also to be used for this, in order to have the resistance strictly proportional to the input converter _{circuit, the ideal} curve of the voltage If the resistance ratio is 15 remaining, keep away by _{o ™ .. ^ 1101n}

Curve shape conditional d »» "« «^« retanrf R is jßfL ₊ i kömien. The power loss at the resistor R is

* 'hferixä very little ..._, "._ _Serfe ^ ende _K on-

then the resulting deviation of the with ^ PJ ^^ TSImSaßten ole!

Current curve in the form of the voltage curve under *> capacitor C we «oa u | ^ _capacitor instead

sSSaSasÄSSi

Effect of this capacitor does not apply, ** spndA die

be shown. Here / _{eII means} the effective * ₅ ^ "^^ ÄSaTtSÄ ^^ value and I _n , the arithmetic mean of a normal equality m

1 sheet of drawings

Claims (4)

voltages on the power supply devices in the claims: cause intermediate amplifier points and thus cause reactive losses, thereby increasing the number of 1. Equalization circuit with LC-Siebschal- femgespeisten Z ^ ^eOTe ^ ^k "'? * SnrtTS" Jung, at the im. Quemveii before the sieve throttle 5 dung the blind assets could be supplied, an alternating current path, consisting of a purifier. circuit of capacitance and ohmic The invention is 5 ^ * 5 ^ Resistance is indicated, marked by filter circuits in VeAujta «nut
The current deviations caused by such a dimensioning of the inverter lead to negative current paths that the lack of resistance (R) *> denotes. It is based on an equatorial circuit -. the same or almost the same is the Vetbtaucher with LC filter circuit, with the resistance in the shunt branch (RJ at the output of the filter circuit of the filter choke an alternating current path, consisting of and the amount of the alternating current resistance of a series connection of capacitance and ohmic capacitance (C) is arranged for voltages with the lowest resistance such Glwchnchvorkommenden frequency is very small compared to I ₅ is terschaltung known (German Patent, ohmic resistance. 748902)... ",., ..,.. 2. Equalizer circuit according to claim I, this task is characterized in a uleichnchterschaldadurcb that the ohmic value of the aforementioned type according to the invention derstand (R) in the alternating current path at load conditions by such a dimensioning de alternating current running concurrently with the consumer resistance *> path solved that the ohmic resistance was the same (R _A ) can be changed. or is almost equal to the consumer resistance 3. rectifier circuit according to claim 2, at the output of the filter circuit and the amount of characterized in that the adaptation of the AC resistance of the capacitance for Spanohmschen resistance (R) at the consumer voltages with the lowest occurring frequency resistance (R _A ) mechanically by switching a _{5 is} very small compared to the ohmic resistance,
is controllable. With this circuit, the communi- 4. Equalizer circuit according to claim 2, ured current half-waves, mean value current, characterized in that the adaptation of the and the superimposed alternating current is assigned a separate resistor (R) to the Ver ter current path with the same load. The consumer resistance (R _A ) can be electronically controlled by means of an auxiliary switching input impedance of the present equivalence. circuit is purely real and practically independent of the form factor of the applied input voltage. The input current therefore changes proportionally with the input voltage, so that they only have an active power from the feeding voltage source