DE1488269A1 - Control circuit for rectifier arrangements with controllable silicon diodes - Google Patents

Description

Control circuit for rectifier arrangements with controllable silicon diodes

The invention relates to a control circuit for Rectifier devices, in particular to a new type of control arrangement for rectifier arrangements in which Controllable silicon diodes are used to provide a constant DC output voltage for a given Range of stress values is generated.

Areas such as telephony, radio technology, In rolling mills, for motor controls or in electroplating, a direct current source is used for the power supply needed. As AC power is often more readily available in most areas, it has become common to to provide rectifier devices in such systems, which convert the available alternating current into direct current convert.

BAD ORKiINAL

909808 / 0Θ53

One

In general, a rectifier circuit must be able to provide an output from _c ^! ; supply DC voltage, which is self-evident in the event of changes in the input voltage and in the event of

fluctuating load current conditions in proportionately tight tolerances must be kept constant ·. At a known rectifier arrangement, which for this Mgtriebsart is suitable, a 'transformer supplies the energy from an alternating current source to a controlled rectifier, " which in turn supplies a direct current to a load. Control devices determine the voltage at the output load, and when the load voltage changes, a control signal is generated that controls the current conduction angle • "silicon rectifiers changed which the rectifier device represent between the transformer and the load »

In such arrangements, the use of controllable Silicon rectifiers using other conventional types of rectifiers, such as ignitrons, thyratrons, Mercury vapor rectifiers or the like. because of the lower voltage drop with controllable silicon rectifiers (less than 1 volt compared to 8 to 25 volts for others known rectifier elements) for greater operational reliability and the lower maintenance of the device due to the increased service life.

,:. . 909808/0653 ' Although

BAD OR'rGSNAL

Although such devices are known to others Types of rectifier circuits "from the point of view of More favorable .and operating conditions are the cost a control circuit with controllable silicon rectifiers is often unfavorable from an economic point of view or even inadmissible. For example, the cost of currently commercially available silicon equalizers in the size required for the control of ritark circuits, twenty times the cost of non-controllable ones Achieve rectifier diodes with corresponding current and voltage values. Obviously by the high The cost of such circuit elements seriously affects the possibilities of using the otherwise preferred control arrangements restricted"

It is obvious that there is a reduction in cost the controllable silicon rectifier with the now Required size or a reduction in size the controllable silicon rectifier, which is for use in controlling the rectifier circuit are needed; (since the cost of the controllable silicon rectifier decrease very quickly with the size) considerably reduce the cost of the overall arrangement

would, so that a more extensive application option of rectifier circuits of this improved type would be possible.

9Ö9808 / Ö6S3

BATH

The aim of the invention is therefore to provide a Cheaper G-I β I erect maintenance, with which controllable Silicon rectifier of reduced size in the primary circuit of the transformer can be used to control output power circuits.

The problem of creating such arrangements is in principle ensohwert that rectifier arrangements, which can deliver a high output direct current, usually have to contain a transformer, which is arranged between the AC source and the rectifier circuit, so that an output current with the desired voltage is generated. In such arrangements, the controllable silicon rectifiers are controlled in such a way that the phase angle of the current flow to the primary winding of the transformer and thus the output voltage of the transformer fed to the rectifier device are changed. In such circuits, however, it is possible that the source voltage is suddenly supplied at phase angles which are close to the building passage of the voltage curve, so that impermissibly large current surges can occur. It can be shown, for example, that in cases where tJ t »Τ , the flux · in the iron core of the transformer

at the

909008/0653

"at the zero crossing of the voltage the value J0 ^β Τ ¥

(with ET * s number of turns of the primary winding) what that corresponds to twice the normal maximum value of the core flow in the steady state »For safety reasons it is therefore necessary to use the controllable silicon gauges to be dimensioned so large that they can absorb a current surge with such a high value. The cost of ^ librarianship will then be extraordinary elevated.

Another problem arises from the fact that when designing transformers with a core material that is comparable to a grain-oriented silicon steel, it has become customary to use maximum instantaneous values of the flux densities in the steady state, which range from 13,000 to 16,000 Gauss the highest values of the primary voltage. If the primary winding is suddenly excited in the vicinity of the zero crossing of the primary voltage curve, the core is evidently driven essentially completely into saturation, whereby only the oily coil reactance of the primary winding represents the instantaneous value of the current begrenzen.Der under these conditions occurring · excessive Strömstöse for controllable ^ö iliziumgleiohrlehter, which are connected in series with the primary winding, large au, ao that such

tax beard 909808/0653

controllable silicon rectifiers would fail as a result of the passage of the excessive instantaneous trans.

Ear tluss is the first investment value for Transforms toreisen in the No.he of 23 0OQ G.; uss, where the magnetization impere windings rise very quickly above 20 0Ö0 Gauss. An obvious solution to the problem the protection of controllable silicon rectifiers in the primary circuit g-j-jen over, icy moments drunk in The initial circuit excitation time would consist of the transformers for maximum institutional To interpret instantaneous values of the flux densities which do not exceed 10,000 Gauss. Unfortunately, through this Dimensioning the size of the transformer considerably over the size increased, which is possible with a permissible clearness of 15,000 Gauss, and the resulting increase its weight, size and cost can be inadmissible in many applications.

Another object of the invention is therefore to provide a control arrangement in which controllable silicon rectifiers reduced size can be used to control transformers, v / elche in which lower value of the river density 'are operated in such a way that that they are only part of the supply voltage for the rectifier circuit deliver so that size, weight and

costs

909808/0663

BATHROOM 0RK21NAL

H88-269

Reduced costs of the entire rectifier arrangement will.

The rectifier circuit executed according to the invention contains a main transformer (which is the bulk of the Transformer capacity) for an operation the higher plus density to supply the lowest load voltage required and a second transformer (which is a smaller fraction of the total transformer capacity represents), the one at the lower plus density to generate the voltage regulation between the lowest required load voltage and the highest load voltage is operated, creating a control circuit that allows the use of controllable silicon rectifiers has inherent operational advantages, is obtained with reduced pots.

A major advantage of the invention is the way in which with such an arrangement, an improved voice override factor can be obtained. It's general

known that when using controllable silicon rectifiers the rapid switching of the controllable rectifier often has harmonics in the one controlled by it With certain applications,

for example the use of rectifier circuits

· $ ÖJrÖ U $ I Ut 5 "V

U88269 - a -

for charging batteries in telephone systems ^ the unwanted harmonics caused by the rapid switching can enter the lines of the alternating current source penetrate, so that by magnetic induction ^ - Disturbances in the telephone circuit are caused. "

In the embodiment according to the invention, in which the controllable silicon rectifier only the connections between the second transformers and the source control, it was found that a reduction in the telephone bias factor by a value up to $ 50 can be obtained, whereby a circuit with improved operating conditions is obtained ..

Another object of the invention is to provide a control arrangement for a rectifier circuit in which controllable silicon rectifiers are connected in such a way that that they have the output voltage of different types of Regulate rectifier circuit in this novel way,

which also includes power rectifier circuits with single-phase and multi-phase excitation.

In the control arrangement according to the invention, the entire Heat dissipation from the power supply level diodes independent from the flow angle at a given load tr * »,

909ÖO8 / GS53;

1480289

. 9 ·. ■

• ο ds »· i & t ir« $ kt * «* vt · t *« iitr $$ g oim * Tol »*» s # de? GHeie & rioli ^ ertBOTdnuag 'exhaltta will.

ι · 1§ «δΐ

? ig.t the structural maintenance E * ah of the control in application »Uf» in · linphaeige & rt «tV-Gl« ichrichtersohaltmig,

? i «.2 tin Di» t »« «dta theitliohen course» of the Auagang-

der aitiohriehteriehaltußf-large

3 shows a diagram of the control elements in use to control a Einpleeen-Zweiweggleicliriciitersehaltuftg with center tap,

3? Ig, 4 a circuit diagram of the control circuit when using && £ control of a 'multi-phase öraetz-r & rectifier arrangement and ---- ^: - - -

! • ig.5 a circuit diagram of the control circuit in use for controlling a multiphase full-wave rectifier hold

General

909808/0653 -bad orkhnai

H88269 - ίο -

Al Tgaaai na £ aaQhJre.ie.ufijr

VI «already mentioned vurti,« expensiveη at »« knew Arrangements controllable 3ili «ium§l« iohrioht «r, which la inserted into the primary circuits of a transformer, the current flow from an alternating current source xu one ^ judge pardon. Such arrangements are 'ehle beet rwaohunge facilities provided that a ° igrial, which represents the charge voltage, and a associated control circuit changed as a function of this

the phase angle (or current flow angle) of the «expensive ^ silicon rectifiers in each cycle, which changes the output voltage of the rectifier circuit and of its Maximum value (value zero of the phase adjustment in the controllable silicon rectifiers) up to the value zero (180 ° Phase lag in the controllable silicon rectifiers) can be reduced.

However, it is known that in many applications it is only necessary that the output voltage when the input voltage and the load current conditions change, which are in the order of magnitude of $ 10 or $ 20 can lie, is kept within narrow limits. With such arrangements, the broad tax range is that of the known "Regulations from an operational point of view are not nioht undesirable, but disproportionately expensive. The control arrangement according to the invention is designed so that they the

909808 / 0S53 desired

8AD:

U88269

gives the desired tax range for use cases where narrower tax ranges are acceptable, which results in a considerable reduction in the cost of the equipment.

The arrangements shown in Inllg.1, 3, 4, 5 generally contain a rectifier arrangement in which a first, uncontrolled voltage source is provided which supplies the required minimum load voltage, while a second voltage source (additional voltage source) serves to generate an addition voltage which the output voltage increases to the value that is necessary to have the output voltage constant with increasing load current. Changes in the current supplied to the load voltage between predetermined minimum and maximum values are obtained by the ^A usgangsspannung the second voltage source changed wi rd.

The arrangement shown in Figure 1 contains an alternating current source 10, which an alternating current via a main transformer 15 to a rectifier circuit supplies. The rectified output voltage of the rectifier circuit 18 is a filter circuit 26 a

changeable

90980Ö / 06 & 3

H88269

~ 12 -

variable load 30. A current flow control circuit 34 is connected in parallel with the load, and the associated error monitoring device of a known type cause the load voltage to be adjusted accordingly if the load voltage deviates from a specified value Duration of current conduction (or current measuring angle) of two switches 41 »42 in a control circuit 40, whereby the duration of the connection of the alternating current source 10 with a second transformer (additional transformer) 43 and thus the value of the voltage supplied by the transformer 43 to the rectifier circuit 18 can be changed.

The ^ main transformer 15 supplies the required Minimum voltage from AC power source 10 across the Rectifier circuit 18 and the filter 26 to the load. If the minimum voltage is sufficient, the controlled switch 41, 42 held locked. When calibrated the voltage of the source 10 or the load 30 changes so that an increased output voltage from the rectifier circuit 18 is required, the power flow control system34 brings the switches 41, 42 in the control circuit 40 at a certain phase angle in each Half-cycle into the current-carrying state, so that the one supplied by the transformer 43 to the rectifier circuit 18 Output voltage is increased. The smaller the ignition angle the controlled switch is, the higher it is Obviously

the

909806/0653

U88269

the rectifier circuit 18 supplied output voltage.

When the voltage value required by the load decreases, adjusts the current flow control circuit 34 the ignition angle the switch 41, 42 so that it occurs later in each half cycle, so that the output voltage of the transformer is reduced. In this way, the flow control circuit operates 34 a constant change in the output voltage dea transformer 43, so that the required constant output voltage when the load changes between the maximum output voltage of the transformer alone and the maximum output voltage of the combined Transformers 15 and 43 is obtained.

Exact circuit description

The embodiment shown in Figure 1 contains in detail a main transformer 15 with a Pritnärwioklung 13, welohe via lines 11, 12 with an exchange xo m source 10 is connected, which can be, for example, the general 110 volt AC network. A secondary winding H on the main transformer 15 is connected via lines 16 and 17 to the input terminals c, d of a Greetz sliding head 25 in the rectifier circuit 18. This contains four diodes 19 to

22nd

9 0 d 8 0 8/0 8 S 3 bad original

H88269

«14 _

22, which are interconnected in the generally known manner that they are at the output terminals a, b a supply rectified full wave DC voltage. According to the 'above B of an announce are the primary winding 13 and the secondary winding 14 of the main transformer 15 is dimensioned so that that their number of turns provide the lowest output voltage that is required for load 30.

The output terminals a, b of the G raetz rectifier 25 are via lines 23, 24 and a Piiter circuit 26 connected to the load 30. In the illustrated embodiment, the filter 26 consists of an inductance 27 which connected in series with the load and a capacitor 28 connected in parallel with the load. The load is 30 in this exemplary embodiment represented by a variable resistor 29. If the circuit is at the practical application would be used to charge a battery, for example in a telephone exchange, the load 30 would consist of the battery with the load connected.

With the terminals of the load resistor 29 are two lines 31, 32, which lead to the current flow control circuit 34. The circuit 34 contains a fault monitoring circuit of a conventional type, which may include a potentiometer,

the

90980Ö / 0eS3 -

_BM >

which is connected to lines 31 and 32 and outputs a proportional voltage which is compared with a reference voltage supplied by a fixed voltage source, for example a Zener diode. Any change between these voltages is called an error or difference signal. Such circuits are well known (see, for example, "SCR Manual", second edition, published by General Electric 1961) ο

Depending on the value of the error or jfferena signal, the current flow control device 34 causes the change in the idgnal, which is transmitted via output circuits 35, 36 and 37 to change the ignition timing of two switches 41 ι 42 in the control circuit 40. In the embodiment shown, the control switches consist of two controllable silicon rectifiers 41, 42, which are connected with opposite polarity in parallel between the V / eohselstromquelle 10 and the primary winding of the additional transformer 43, so that the one switch 41 in the positive half-wave and the other switch 42 operates in the negative half-wave. The operating time in the relevant half-waves is determined by the point in time at which the signal is received via the lines 35, 36 or 37, 38 by the current flow control circuit 34. "

the

909808/0 $ 53 bad original

The secondary winding 45 of the transformer 43 is on the line 16 to the terminal c of the Graetz circuit 25 and over a line 46 is connected to a terminal e, which has a Diode 47 with the terminal a and via a diode 48 with the Terminal b is connected. The manner in which the main transformer 15 the minimum voltage of the load 30 is generated, and how the circuit excites the additional transformer 43 so, that he has to the voltage of the transformer 15 a voltage in such a way that a constant voltage across the load 30 is obtained.

Operation of the rectifier circuit of Fig.1

The diagram of FIG. 2 shows the range of output voltages which is obtained with the circuit of FIG. _{The voltage e_ v} plotted on the ordinate

Gl I D

(which the output voltage on the output lines 23, 24 of the Grraetz orthodontist) is never smaller than the voltage e-, which from the main transformer 15 den ■ Input terminals o, d of the Grrmetz-Grleiohrichters 25 supplied During the positive half-wave the diodes 20, 21 current, and during the negative half-wave the diodes 19 »22 carry current, which means a full-wave direct current through the

Output terminals

909808/06 5 3

Η8Θ269

Output terminals a, b is transferred to the load. The ones from Output voltage generated by the rectifier corresponds to the previously specified minimum voltage (i.e. the output voltage of the main transformer 15). If the Voltage requirement of the load 30 calls the change of the signal ** values on lines 31, 32, a corresponding error signal in the electricity flow control system 34, which in turn, the ignition time of the controllable silicon rectifier 41, 42 changed in such a way that the Output voltage fed to the slide clock circuit 18 of the transformer 43 is changed accordingly.

For example, if the voltage requirement increases, it decreases that transmitted via the output lines 35, 36 and 37, 38 Control signal the ignition angle θ of the controllable silicon rectifier 41, 42 so that these rectifiers are fired earlier in their respective half cycles and the current flow across the primary winding 44 of the transformer 43 increases. The increased current flow leads in turn to an increase in the rms voltage which occurs in the secondary winding 45 and along with the output voltage of the transformer 15 is fed to the rectifier circuit 18 will.

While aer positive half wave, the diode 20 performs the Lastatrom up to the time when the controllable welohem

Silicon-

909808/0653

H88269

- ΊΟ «

Silicon gullet 41 is energized (ignition angle Q). At this point in time, the diode 48 becomes conductive and the diode 20 is blocked, so that the output voltage of the transformer 43 is added to the output voltage of the transformer 15, and a resulting voltage is obtained which keeps the load voltage at the desired value. W; During the negative half-cycle, the diode 19 carries the load current until the point in time at which the controllable silicon rectifier 42 becomes live (ignition angle 'S "+ ©), whereupon the diode 47 takes over the load current and the diode 19 is blocked.

If the load decreases, the current flow control circuit 34 outputs a signal via the lines 35 »36 and 37, 38 that the ignition angle θ of the controllable silicon rectifier 41, 42 enlarged and thereby delayed the ignition timing of the rectifier in the corresponding half-waves, so that the output from the transformer 43 and to the output

voltage of the transformer 15 added voltage is reduced.

The output voltage of the rectifier circuit 18 increases accordingly. As later with reference to Fig.3 is explained in detail, represents the measure that diodes,

how

909808/0653

like the diodes 19 »20, are blocked when other diodes, how the diodes 47, 48 carry current, an essential one Feature of the invention.

The diagram of Fig.2 shows the resulting ■ output voltage of the transformers 15, 43 at a certain ignition angle which of the current flow control circuit is determined according to a certain load

If the "'load requires the minimum voltage, the ignition angle θ is initially IT (180 °), and the controllable silicon rectifiers 41, 42 are not ignited at all, so that only the output voltage of the main transformer 15 (shown in FIG. 2 at e.) The mean value of the rectified output voltage in this operating mode is -sp- = · E ₁ .

If the load requires the full output voltage of the rectifier circuit 18, the current flow control circuit 34 causes an ignition angle of θ = 0 ° and the controllable silicon rectifiers $ 1, 42 are current-carrying for the entire duration of the corresponding half-wave. In this case the Auagga voltage corresponds to the curve e _t + e «and the mean value

η J η

the rectified output voltage is' (B-

There

909808/0653

H88269

Since the above values represent the minimum and the maximum ■ mean value of the rectified output voltage and the value of the voltage βο can be changed solely by changing the ignition angle Q of the controllable silicon rectifier 41, 42, the output voltage of the rectifier circuit 18 can obviously be between e .. and ej + e _{2 can be} changed. In the example shown in Pig. 2, the ignition angle of the rectifiers 41, 42 is approximately 60 ° or 240 °, and that supplied by the transformer 43

rectified output voltage (e ₂ )> which is added to the minimum voltage (e ^) generated by the transformer 15 is represented by the hatched section of the curve, which is 41 + 43 in the first half-wave and 42 + 43 in the second half-wave is designated. This also shows the nature of the output voltage at different ignition angles of the controllable silicon rectifier.

This basic circuit can of course be modified in several respects, as would be readily apparent to a person skilled in the art is recognizable.

Single phase

909808/0653

H88269

Single-phase full-wave earthread circuit with center tap »

Figo3 shows that explained in connection with Fig.1 Control arrangement when used for the control of a single-phase full-path rectifier adjustment with center tapping, where the 'corresponding to the circuit of Fig. Parts are provided with the same reference numbers, but increased by 100.

The 3voltage source 110 is connected to the primary winding 113 of the main transformer 115 via lines 110, 111, 112. The secondary winding of the transformer 115 consists of an upper section 114a and a lower section 114b. The outer terminal of the upper and lower section 114a of the secondary winding is via an iode 149, a filter 126, the load 130 and a line 153 with the center tap 154 is connected, the outer terminal of the lower section 114b is also connected to the center tap 154 via a diode 150, the filter 126, the load 130 and the line 143 .

The current flow control circuit 134 has input lines 131 »132, which are connected to the terminals of the load a Ind. It controls the ignition angle το η iwei

■ expensive

BAOOR ₁₀₁ NAL ^{909β0Ι /} ° * "

H88269

controllable silicon equalizers 141, 142, which are connected between the source 110 and the primary winding 144 of an additional transformer 143. The secondary winding of the transformer 143 consists of two sections 145a and 145b. One section 145a is in series with the upper winding section 114a of the main transformer in a circuit which is connected to the lower terminal via a diode 151, the filter 126, the load resistor 129, the line 153, the center tap 154 and the secondary resistor section 114a the winding 145a leads. The lower portion 145b of the transformer is located together with the ^ ekundärwicklungoabschnitt 114b of the main transformer 115 in a circuit, the 145b itung 153 of the lower terminal of the secondary winding via a diode 152 which i'ilter 126, the load resistor 129, the L _e, the Center tap 154 and the lower winding section 114b to the upper

Terminal of winding 145b leads.

The operation of this circuit arrangement largely corresponds to the B _p drive explained in connection with FIGS.

The primary winding of the transformer 115 is excited via the lines 11, 112, and the output voltage of the secondary winding 114a, 114b is fed to the load 130 via the diodes 149, 150 as the minimum load voltage, the current path being at the minimum voltage during

the

909808/0653

BATH ORIGINAL

U88269

of the positive halftone from the top terminal of winding 114a Via the Iode 149, the filter 126 and the load resistance 129 to center tap 154 and during the negative half-wave from the lower terminal of the lower winding sleeve 114b via the diode 150, the filter 126, the load resistor 129 and the line 153 to the Mitie lanzapfung 154.

The ^{current flow control circuit 134 adjusts the ignition angle of the controllable silicon rectifiers 141, 142 in the manner described above} in such a way that the value of the stream is changed which is fed to the primary winding 144 during alternating half-waves of the current of the source 110.

■ ^ he resulting output voltage, which is applied to the secondary winding 145a of the additional transformer 143 appears during the positive half-cycle, becomes the minimum voltage added, which is supplied from the secondary winding 114a of the main transformer 115, the diode 149 the load current from 0 ° to the ZUndwinkel θ and the rectifier diode 151 transfers the load current during the Re: ts leads to the positive half-wave. In the negative The hulb wave becomes the one appearing on the secondary winding 145b

Output voltage

9 0 9 8 0 8 / a «3

. ■. H88269

The output voltage is added to the minimum output voltage of the secondary winding 114Ta, the rectifier diode 150 carries the current between 180 ° and the ignition angle Tf + θ and the diode 152 at this point in time the Conducting the current to the load 129 takes over.

This shift in the current conduction via the diodes represents a significant advantage of the invention, since the entire heat dissipation from the first pair of diodes 149, 151 for a given load current is independent of the Ignition angle θ, so the heat sink for these two parts can be the same as it is normally for the a rectifier 149 alone would be required if this' Rectifier would be operated without primary control. That

the same applies to rectifiers 150 and 152. The addition the rectifier 151, 152 thus increases the space required by the rectifier arrangement.

Multi-phase Graetz ^ or rectifier arrangement

4 shows the use of the control circuit for controlling a polyphase Graetz rectifier circuit. The voltage source 210 is a three-phase source with outputs XY, YZ and ZX for the three different phases. The ingredients for

ei η e

90980 8/065 3

U88269

one of the phases, namely the phase ZX, are in detail explained; the connections for the other two phases result from this without further ado.

A main transformer belongs to every P ^ ese, namely the Transformer, 215ZX for phase ZX, with a primary winding 215ZX, which is connected to lines Z and X of source 210, and with a secondary winding 214ZX,

which an outer terminal of a Graetz GHeichrichteranordnung, is connected via a line 274 to the terminal 275 connected 218 while the second ^A usseηklemme across the secondary winding 214ΧΎ uöd -the L _TION 271 to the terminal 272 of the Graetz Gleiohrichteranordnung and via the secondary winding 2UYZ and Line 272 'is connected to terminal 273 of the Graetz-G-line arrangement. Corresponding to the conventional operation of three-phase circuits, the current is supplied via three different paths, each path serving as a return flow for the other two paths and the three current components being mutually phase-shifted by 120 °.

three input terminals 272, 273 »275 of the Graetz rectifier arrangement 218 are connected to the secondary windings for the three different phases XY ₁ YZ and ZX of the source

tied together. Each terminal, for example terminal 272,

■ shares

90980Ö / 08S3

-26- U88269

represents the center of a Eicdenpaares, such as the egg aenpaaras 256, 258, wherein a represents Eioden of each pair represents L ..- ■ st line 223 and the other with Liode ύϋτ Lsstleltung 224 v? is rbunden. The terminal 273 for the second phase YZ is connected to the lines 223 »224 via diodes 260 and 262, and the terminal 275 of the third phase ZX is connected to the lines 2ü3, 224 ilb3r Eioden '264 and 266.

minimal L ^ atspsänun. ^ / ird the eats 230 from the transforms Torstromv / egen XY, YZ and ZX iibar the units 256, 258; 260, 262; and 264, 266 the rectifier circuit 218 and the Filter circuit 226 feeds. For example, the Stromr / eg for the phase ZX from the source 210 to the primary supply; 213ZX of transformer 215ZX. The -Aus ^ sngskreis the secondary winding 2-14ZX runs over the Line 274, the terminal 27.5, the diode 264, the filter 226, the load resistor 229, the line 224 and the each part of the current-carrying period. of the periods 258 and 262 (depending on the phase angle involved) to the terminal 272 or 273 and via the secondary winding 214XY or the secondary winding 214YZ to the second terminal of the Secondary notification 214ZX. Corresponding current paths can for phases XY and YZ are followed.

- " Correspondingly

909808/0653 % * ® QWGaNAL

According to the inventive concept explained above Auxiliary transformers 243XY, 243YZ and 243, ZX provided, which provide an additional output voltage from the source which is added to the minimum output voltage that of the transformers 215XY, 215YZ and 215ZX is produced.

For this purpose a current flow control circuit is provided which has input lines 231, 232, which are connected to the load terminals. This control circuit generates control signals which the Determine the ignition angle of switches that are provided in the control circuits 240XY, 240YZ and 240ZX, each of which is assigned to one of the three phases. For example, the control circuit 240ZX for the third phase two controllable silicon rectifiers 241ZX, 242ZX, the opposite polarity parallel between the lines Z and X of source 210 in series with the primary winding 244ZX of the additional input format drive 243-.ZX connected are and 'the duration of the supply of current to the auxiliary transformer Control 243ZX in the associated phase during each cycle »■,:. . ■

For a single phase s, I results in the following operation; If the voltage at the load resistor 229 is changed so, that an uh'derüng of the rectifier circuit

train journeysη

vv-t,%. _; 909808/0653, \ ^B * ^D 9 ^Rfö J ^NAL

supplied voltage value is required, results in the on the input lines 231, 232 of the current flow control circuit 234 occurring tension erosion a Dehleröder Difference signal of a corresponding value, and the circuit 234 causes a corresponding change in the ignition angle the silicon controllable rectifier in each of the control circuits 240XY, 240YZ and 240ZX.

In the third phase, for example, causes the corresponding change of the ignition angle of the silicon controlled rectifier 241ZX, 242ZX a corresponding change in the Z _e itdauer in which current flows from the source 210 through the line Z and the primary winding 244ZX of the transformer 243_J2X, the L _e itupg 246ZX, the current-carrying controllable silicon rectifier 241ZX or 242ZX and the line 276 flows to the line X of the source 210.

_N Ä This alteration of the duration of the current flow through the primary winding 244ZX causes a corresponding adjustment of the output voltage appearing at the secondary winding 245ZX which is in series with the -jekundärwicklung 214ZX which provides the required minimum voltage. During the positive half-wave, the diode 264 conducts current up to the ignition angle Θ, at which the diode 263 takes over the conduct of the load current for the phase ZX. In the negative

Half wave

909808/08 53

U88269

~ 29 -

Half-wave leads the diode 266 current up to the ignition angle Θ,

at which the diode 265 becomes live. The resulting Output voltage of the secondary windings 2HZX and 245ZX is supplied by rectifiers 264, 266 and 263, 265 via the Filter 226 supplied to load 230.

From this it is easy to see in what way the Control circuits 240XY and 24OYZ the additional transformers Control 243Χ3Γ and 243YZ so that an additional voltage obtained for the first phase XY and the second phase YZ will.

Crystal earphone arrangement in star connection

Fig.5 shows the application of the control circuit for Control of a Grleichriohter arrangement 318 in star connection. Circuit elements included in the arrangements

of Hg. 1, 3 and 4 correspond, are by equiv The tens and units of the reference numerals are marked with the number 3 in front.

The three-phase alternating current source 310 shown in Pig. 5 supplies the excitation current for three main transformers 315XY, 315YZ, 315ZX ₁ which are in the three different ones

Phases

909808/0653

H88269

Phases XY, YZ or ZX are switched on. The auricles of the three main transformers 315XY, 315YZ, 315ZX run over the filter 326 and a compensating throttle 385 to the La3t 330 As with the previously described embodiment, there is one Stromflussateuerschaltung 334 with input lines 331 »332 connected to the load resistor 329, so control signals in each case via three associated output groups the three control circuits 34OXY, 340YZ or 340ZX for the three different phases «

The control circuit controls to control the first phase XY 340XY the duration of the current flow from the source 310 to the primary winding of the additional transformer 343XY » The additional transformer 343XY carries two secondary windings 345XY and 345XY ', the voltages of which correspond to the Output voltage of the main transformer 315XY for the associated phase XY must be added. For simplification the description only mentions a single hare of the three-phase arrangement because the connection of the remaining phases results from this without further ado.

For phase XY it can be seen that lines X and Y the source 310 to the primary winding 313XY of the main transformer 315XY are connected. The secondary side

of

BATH ORIGINAL

909808/0653

of the transformer 315XY contains an upper winding 314XY and a lower winding 3HXY ¹ , which are connected to the load 330 via ¹ associated rectifiers 356 and 358, respectively, of opposite polarity. The current path for the upper one

For example, winding 315XY runs from the lower one Clamp the winding 3HXY via the diode 356, the line 323, the inductance 327 in the filter circuit

326, the load resistor 329, the line 386, the center tap of the equalizing throttle 385 and the line to the upper terminal of the 3HXY winding.

The upper terminal of the secondary winding 3HXY ¹ is via the diode 358, (which is polarized opposite to the diode 356 and therefore in the other half-wave of the phase

XY carries current), via line 324, the inductance

327, the load resistor 329, the line 386, the center tap of the compensation throttle 385 and the line 388 are connected to the lower terminal of the winding 314XY ¹ . When nuc the minimum voltage is required, the diodes 356, 358 conduct current during the alternating half-waves of phase XY, creating a phase of the

required minimum voltage for the load resistance 329 is delivered. From this it is also easy to see in which way the transformers 315XY, 315YZ and 315ZX

together

9 0 9 8 0 8/0653, ^BAD

H88269

- - 32 common the. Generate minimum voltage in all phases. ,

Assuming that the load requires a voltage greater than the minimum voltage, the change will cause the .Voltage at the load resistor 329 that an error detector circuit 376 emits a difference or error signal, which is supplied through an amplifier 377 to the phase shift circuits 379XY, 379YZ and 379ZX for the three phases will.

In Fig.5 there is only the 'control for one of the three phases

because it is readily apparent how the remaining phases of control circuit 334 are controlled.

The output of the error detection circuit 376 and amplifier 377 determines the amount of delay produced by each of the phase shift circuits 379XY, 379YZ, 379ZX. Characterized in that the error signal via a common lead 378 to the inputs of di-eiphasen- shifter circuits 379XY, etc. is supplied to the size of the phase shift is η in the control circuit "34-ΟΧΥ, 34OYZ and 34OZX in the three different stages of the same.

The from phase shift circuits 379XY, 379YZ and 379ZX output pulses are, however, around 120 °

against each other

909808/0653

BAD ORKjINAL

U88269

offset against each other. This is done by a pulse transformer in each control circuit (for example, the transformer 384 for phase XX ^-), the primary winding with the appropriate phase lines X and Y of the source is connected.

Thus, the primary winding of transformer 384 for phase XY is connected to lines X and Y of source 310, and the secondary winding of transformer 384 is connected to a Gate circuit 389 connected, which fades out a pulse at the beginning of each half-wave of phase XY, which via a Phase shift latch 379XY and a pulse amplifier fed to the primary winding of the output transformer 382XY will. Since the output signals of the suppression transformers, such as the transformer 384, are »separated from one another by 120 ° are, and the size of the phase shift of the control signal is the same in the different phases, they remain the same Output transducers similar to the type of transducer 382XY fed signals at a distance of 120 °.

The secondary side of the output transformer 382XY contains an upper winding 383 which, via lines 335XY, 336XY, connects to a first controllable silicon rectifier 341XY connected 1st, so that when a pulse occurs on the output lines 335XY, 336XY in the first half cycle of the

phase

909808/0653

Phase XY the silicon controllable rectifier 341XY begins to conduct a current from the source 310 to the input circuit of the associated auxiliary transformer 343XY. Output lines 337XY, 338XY of the current flow control circuit 334 control the associated controllable silicon rectifier 342XY in the control circuit 34OXY, _so that it becomes effective in the same relative time during the second half cycle of phase XY

When operating the controllable silicon rectifier 341XY creates a current path from source 310 via line X, the silicon controllable rectifier 341XY, the primary winding 344XY of the transformer 345XY and the line Y. of the source 310. As a result of the current flow through the primary winding 344XY and the corresponding induced Voltage in winding 345XY, the diode; 55 is energized, while diode 356 is blocked and that from transformer windings 3HXY and 345XY The voltage supplied to the load resistor 329 via the diode 355 is increased by an amount which corresponds to the

Duration of current conduction of the controllable silicon rectifier ο
341XY depends on the half-wool in question

^ controllable silicon rectifier 342XY is in same

s ^ way controlled during the negative half-wave, and the

&> in the transformer winding 345XY ¹ induced resulting in

Voltage causes diode 357 to conduct current while blocking diode 358, which means that the additional output

OWGtNAL INSPECTED

Voltage for the tram; formator windings 314XY ¹ and 345XY ^{1 are} generated, whereby the output voltage depends on the latency of the current flow of the controllable Sili.iu-daylight rectifier 342XY in the second half.

The above observation shows that the flow control 334 controls the operation of the control circuits 34OYZ and 34OZX for the phase YZ or the phase ZX 30 in a way that additional voltages can be used for the periods 359-361 for the phase YZ and via the periods 363, 365 for the ¥ ln se ZX.

S c h1u s a note

In the preceding description -mrden new power supply units described in which controllable silicon rectifier, thyratron, ignitrons or the like. to control the iu.3. angss voltage of a rectifier circuit in the area d r -Aua ^ nngsspBnnung used v / ground, d ^ r to meet the ..αϊ the facility is required, The basic idea of the invention is adaptable, d-.vss ar without .ve i te res for the control of single-line and multi-line rectifier arrangements ver // can be terminated in arbitrary known arrangements are connected to each other.

A reduction of dr Gres, depending. · The Gea -ΜίΛβχν, rdnung, which from the Vor / endun; .-; djr Sei .. .1 tungDbe ^ taieileile in this novel way i'.Vl;jl,; r .; : '); ■, light the manufacture of the complete ../idigen plant iini / ji-.' ^. I.it'Joh vor'i'in -jrten costs. Auü ^ erd ^ uj ^, - gives

909808/0653

u ie

ORK3INAL

~ 36 -

the circuit provides protection for the more expensive control elements used in the circuits, against damage by overcurrents in a simple and cheap way, Another feature of the invention consists'in the way the improved Control and operational safety can be achieved without having to increase the size of the heat sink. ,, ,, ...- which is required for the semiconductor elements. As . The result of this can be the improved control without enlargement of space requirements and without increasing the cost of the overall arrangement.

Claims

909808/0653. bad ordinal

Claims (1)

H88269 Patent to s ρ r U. ο h β Power supply circuit for supplying a controlled ^ uagangsgleiohespannung from a Weehoelstroiaquelle, marked by a rectifier circuit, a first ^ Tromversoaginßs circuit for supplying a voltage from the source to the rectifier circuit, Means for connecting the output of the rectifiers cha It ung with one load, a second power supply circuit with an additional transformer Providing an additional output voltage from the source to the rectifier hold, at least one controlled switching device, which is connected in such a way, that eie the excitement of the additional transfer oma tore τοη the Source controls, and through a control circuit to Setting the Zilndwinkele β of the controlled switching device on rerichiedene values, thus one accordingly different output voltage from the second Strootversorgun eeo maintenance is obtained 2 ·> power supply circuit for the delivery of a controlled one DC output voltage from a electrical power source, ; ^ denotes by a Crieichrichterechaltung »a first 909808/0653 first otromverssrunrsscheltung for the delivery of a ■ -! Rregun · .voltage from the source to the rectifier circuit, Means for connecting the output the rectifier circuit with a load, error detection devices for the delivery of signals that have a 'b- deviation of the Laat tension from a given value show a second; power supply circuit with an additional transformer for supplying an increased output voltage from the source to the rectifier circuit, the output voltage of the iiieichrichterseh; Itung is equal to the sum of the voltages of the first and the second power supply circuit, a pair of switching devices which are connected in parallel with opposite polarity in such a way that they control the excitation of the additional transformer, and by a control circuit which, depending on the signals of the PehlerdetektoranOrdnung Z.indwinkel 9 of the switching device in successive half-waves abv / echselnd controls to supply a constant output voltage. 3. Power supply circuit * for delivery of a controlled one DC output voltage from an AC power source, characterized by a rectifier circuit, a First power supply with a main transformer to supply a first excitation voltage from the Source 909808/0653 BAD orwinal U88269 Source to the Gfeichriehterschrltung, means for connecting the output of Ojeichrichterachaltung with eitiT load, a second ütromversorgungsschaltung with an additional transformer for the supply, an additional output voltage from the source to de- Grleichrichterschaltung, a Pair controllable '' iliziumgleichrichter, ■ which politer in ge gen . Parallel connection arranged in such a way that they control the regulation of the additional transformer from the source, and by a control circuit which sets the ignition angle of the controllable silicon rectifier in each half-wool to such a value that a constant output voltage is maintained at the load Stromyersprgungsgehaltun-g according to Aosuruch 3, thereby marked that the rectifier maintenance one, öraetBr-G-.leiehr.iGhter- contains j and that '•' inrichtuögen are provided, which the output of the main transformer * and the output of the additional transformer Connect the / Traetz oil rectifier circuit. . Str.omv.ersorgungaschaltunii for the delivery of a controlled ■ Output DC voltage from an AC power source, characterized by a Gleiebrichtersohaltung with "a first garter arrangement and one ■ "'■' ■" "" 'second 9Ö9808 / .065 U88269 second sliding arrangement, a first power supply connection for supplying an excitation voltage from the source through the first rectifier assembly to the load, a second Power supply circuit for supplying an increased output voltage from the source via the rectifier assembly to the load, the first rectifier assembly Is blocked as soon as the second judge order Electricity conducts, facilities for connecting the output the rectifier circuit with one load, at least one controlled switching device that s <~> is connected that · they the excitation of the second power supply circuit τοπ the source controls, and ztur through a control circuit Control of the current flow of the controlled switching device in every cycle. 6. Stromver8org: ngsBChultung to supply a controlled ^A usgangsgleiehsparnung from an AC power source, characterized by a rectifier circuit with at least e iner first, a second, a third and a fourth Gleiehrichteranordnung, a first Stromversorgungsschaltuag to supply a ^ rregungsspannung from represent source ttber the first and the second rectifier arrangement, the first and the second rectifier arrangement being connected in such a way that they take effect in alternating half-waves, a second power supply circuit with an additional transformer for supplying an output voltage VOB 9 0 9 8 0 8/0653.,. BATHROOM 0RK3ÜNAL from the source via the third and fourth alignment arrangements, a pair of controlled holding devices that do so are connected so that they control the excitation of the additional transformer », whereby each of the controlled switching devices directions in a different half-wave will be effective, and by a control circuit, which of the controlled switching devices in the associated half Ellen to different values adjusts the Ztfndwinkel 9 such that the output voltage is characterized ° boosting transformer set to different values, 7 · Power supply circuit according to claim 6, characterized by means which connect the first and the second rectifier arrangement in such a way that these through the Operation of the third and the fourth rectifier arrangement are brought into the Soerrstatus, and by devices, which · the outputs of the first and the «wide power supply connection <erart connect that then the ■ ^ troB over the third and fourth G & eiohri ent er order flows. 8 «Electricity supply maintenance for the delivery of a controlled Output voltage from an alternating current source with a Corrector posture, at least one first, a second 909808/0653 H88269 and a third input terminal, a first power supply circuit for supplying an excitation voltage * Ton of the source to the first and second input terminal via the rectifier circuit, a second power supply circuit with an output circuit for supplying an output ^{voltage from the} external source the first and third input terminals of the rectifier circuit, at least one controlled rectifier arrangement which is connected so that it controls the excitation of the second power supply circuit from the source, a control circuit for controlling the ignition angle of the controlled rectifier arrangement in each cycle, and by means in the rectifier circuit which block the input current to the second terminal when the controlled locking device is active, the output current of the first power supply circuit and the second power supply circuit then being fed to the first to the third terminal is performed. 9 · Power supply circuit for delivering a controlled ^ Equal output voltage from an alternating current source Graetz rectifier circuit, which has at least a first, has a second and a third input terminal, a first Power supply circuit for supplying an excitation voltage from the source to the first and the second input terminal for the 909808/0653 BATH ORIGINAL ■ ν .- ,, - Η88269 The rectifier contains a second power supply circuit with an output circuit for supplying an output voltage from the source to the first and the second terminal of the rectifier circuit, at least one controlled switching device which is connected in such a way that it interrupts the control. the second power supply ne ^ sschaltung in a half cycle of the source voltage controls, a control circuit for controlling the Zändwinkels of the switching device in each cycle, and durcii facilities Gleiehrichter-Rchaltung for locking the i ngangsströme the second terminal during operation of the controlled switching device, wherein the ^a usgangsstrom the the first and the second power supply circuit are then fed to the first and the third terminal. 10. Stromversorgnn ^f 's circuit for supplying a controlled output DC voltage from an alternating current source, characterized by a rectifier circuit, a first power supply circuit with a transformer »which has a secondary winding with central tap, devices for supplying a ^ excitation voltage from the secondary winding to the Gielchrlchterschaltung in each half-wave of the alternating current of the source "a second" supply circuit with a pair of rectifier arrangements "an additional transformer with a panel ^BAD0RIQINAL ■■■ · ■■■■ 'U88269 Windings for the supply of an output voltage from the source via the Pa ^ r Gleicliriclit & ranbrdöußgeß to the load in different half-waves of the source current, a Ba: -? Ir controlled rectifier rs cha It er, the. so connected; are that they control 4ie excitation of ZusfctB-transformer by the source in different half-waves, and the 'tromf by a control circuit ^{zur.Steuerung:} ihrungsperiod © the controlled sliding ear Ichter-switch in the associated half-waves · -. , .. · ..- 11. Power supply circuit for supplying a controlled DC output voltage to a polyphase inverter power source, characterized by a G Ie ic breaker circuit, a number of main power supply circuits, each of which is connected in such a way that it provides a power supply for another ^: 'hase from the source to the rectifier circuit, a number of additional power supply circuits, each of which is connected to provide an additional output voltage to the rectifier circuit for each other phase, at least one controlled switching device connected to 00 that it controls the excitation of at least one auxiliary power supply circuit, and by a control circuit that controls the ignition angle of the controlled switching devices 12 « 9 0 9808/06 53 '"' - - '~ BAD H88269 2. i-troiivers supply circuit for the delivery of a controlled one DC output voltage from a multiphase alternating power source, characterized by a rectifier circuit, a number of main power supply units, Each of which is connected to provide an excitation voltage for a different phase of the source to the rectifier, a number of auxiliary power supply circuits, each of which is so connected is that they are an, additional output voltage from the source supplies at least one controlled switching device to the rectifier circuit for a different phase in each case, which is so connected that they get the excitement of at least one of the auxiliary power supply circuits controls devices for connecting the output of the rectifier circuit to a load, fault detection devices for the delivery of signals, which · a deviation of the Display load voltage of a given value, and by a control circuit, which in dependence on the output signals of the error detector devices the angle of ignition of the controlled holding devices so control «that a · constant output voltage at the Load is received 909808/0653 H882 & 9 13 · Power supply circuit for providing a controlled - DC output voltage from a polyphase AC source, characterized by a rectifier circuit, a number of power supply circuits, each of which is so connected that it provides a voltage for an error another phase from the source to the alignment -circuit supplies, a number of additional power supplies— circuits, each of which is connected so that one an additional output voltage to the rectifier circuit delivers for a different phase in each case, a number of Circuits, each of which contains a parallel-controlled rectifier arrangements which are mutually opposite polarity parallel-connected and each control the excitation of another additional 3-current supply circuit, and a control circuit for adjusting the duration of the strobe control of the controlled Corresponding rectifier arrangements for the various auxiliary power supply circuits in such a way that the Total voltage is regulated, what! " the rectifier circuit is supplied in the various phases. 14 · ^ power supply circuit, characterized in that the Rectifier arrangement contains a number of rectifiers, which are shown in asterisks 15 * Power supply circuit for the delivery of a controlled η Output equilibrium voltage τοη of a multi-phase alternating current _ source, characterized by a rectifier circuit, 90980i8 / 0653 facilities BATH ORIGINAL _{; :} U88269 Equipment for controlling the external spauning for 3rd ew6ile a phase with at least one Hiaup t Stromve rs orgungsschaltun ^, which is a primordial tension from the source to; the. The judge’s attitude delivers, with a main transformer, which is connected in such a way (if it generates a predetermined output voltage for the one socket, a second power supply circuit with an additional transformer which is connected to one phase of the source in such a way that it generates an additional output voltage from the source To the rectifier circuit for one phase supplies a pair of controlled Greek rectifier arrangements, which are connected in such a way that they control the excitation duration of the auxiliary transformer for one phase, ... and through a control circuit to the control of the current management period of the co-ordinates in each cycle · ""'■' ■■ '- ■■ ■ ■' ■■■ · ■. ··; ■ · ... · - -: ■ -; ■ ... - ■ "■ 1 <5 × Stromversorgungsnchaltung according to claim 15, characterized in that the rectifier circuit comprises a first switching device for Heferung a direct currents to a load for * a - are vorgesehfen Höse entöältj that means that the output of the Hauptstromvereorgan ^T, s- Connect circuit to the first switching device that a second Schalteinriehtung is provided which supplies a direct current to the load for one phase, that the second flow supply line is connected so that that -, - 909808 / G653 ^SAD OWOINAL_ U8Ö269 that she operates the second direction of light »and that the «wide chalteinrichtUHg at ^ rreguag äureh the «wide trcevereorgtngsöohsltuDg the« rate switching device locked up and the entire Lastatroia for the corresponding phase in case of tension, which equal to the susme of the output voltage of the main power supply and the wide power supply circuit is. 17. fstroaiversorgungseeehaltung for delivery of a controlled output from a Weohsel power source, characterized by a · rectifier circuit, a first power supply circuit with a rated transformer for the delivery of a first output voltage from the source to the rectifier circuit, where the! transformer bit of a relatively high fluaadiohte is operated «ine second power supply circuit with an additional transformer for delivery of a additional output voltage sound of the source «to the Rectifier attitude, which to the first output voltage is added, whereby the additional transformer with a plusdiohte of relatively low value operated by at least one controlled switching device, which is connected in such a way that si «dl« 909808/0653. BATH ORIGINAL Excitation of the auxiliary transformer controls, and by • A control circuit for controlling the ignition angle the ojelohriohter arrangement in each cycle of the power source 909808/0653