DE971264C - Arrangement for braking a DC motor which is fed by a rectifier working with grid-controlled vapor or gas discharge paths - Google Patents
Arrangement for braking a DC motor which is fed by a rectifier working with grid-controlled vapor or gas discharge pathsInfo
- Publication number
- DE971264C DE971264C DEL5615A DEL0005615A DE971264C DE 971264 C DE971264 C DE 971264C DE L5615 A DEL5615 A DE L5615A DE L0005615 A DEL0005615 A DE L0005615A DE 971264 C DE971264 C DE 971264C
- Authority
- DE
- Germany
- Prior art keywords
- motor
- braking
- fed
- arrangement
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
- H02P3/12—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by short-circuit or resistive braking
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Description
Anordnung zum Abbremsen eines Gleichstrommotors, der durch einen mit gittergesteuerten Dampf- oder Gasentladungsstrecken arbeitenden Gleichrichter gespeist wird Die Erfindung bezieht sich auf eine Anordnung zum Abbremsen eines Gleichstrommotors, der durch einen mit gittergesteuerten Dampf- oder Gasentladungsstrecken arbeitenden Gleichrichter gespeist wird, von einer höheren auf eine niedrigere Betriebsdrehzahl. Es ist hierzu bereits vorgeschlagen worden, unter Aufrechterhaltung der elektrischen Verbindung zwischen Gleichrichter und Motoranker die Einstellung der der neuen niedrigen Drehzahl entsprechenden Ankerspannung dadurch erfolgen zu lassen, daß die Wechselspannungskomponente an der Kathodendrossel zur Steuerung eines Bremswiderstandes dient, wobei der Bremswiderstand dazu bestimmt ist, die Drehzahlverminderung herbeizuführen.Arrangement for braking a DC motor, which is driven by a Grid-controlled steam or gas discharge lines working rectifier fed The invention relates to an arrangement for braking a DC motor, the one working with grid-controlled vapor or gas discharge paths Rectifier is fed from a higher to a lower operating speed. It has already been proposed for this purpose, while maintaining the electrical Connection between rectifier and motor armature setting the new low Speed corresponding armature voltage to be made by the fact that the alternating voltage component on the cathode choke is used to control a braking resistor, the braking resistor is intended to bring about the speed reduction.
Bei Gleichrichtern mit einer Phasenzahl größer als zwei ergibt sich nun die Schwierigkeit, daß die Wechselspannungskomponenten an den Kathodendrosseln im allgemeinen zu klein sind und der Bereich ihres Auftretens infolgedessen weniger genau als bei zweiphasigen Gleichrichtern definiert ist. Dies wird erfindungsgemäß dadurch umgangen, daß ein zum Steuern des Bremswiderstandes dienendes Relais als Bürde eines im Gleichstromkreis liegenden Gleichstromwandlers vorgesehen ist. Der Aufbau eines solchen Relais unter Verwendung der üblichen Elemente und Bauformen ist aber nicht ganz einfach, da die Ansprechgrenze dann bei etwa 5 bis roo/o des Betriebsnennstromes liegen muß. Die Bürde dieses Wandlers in Gestalt des Widerstandes der Relaiswicklung wird nun aber so gewählt, daß ein den Windungszahlen entsprechendes Übersetzungsverhältnis der Ströme nur im Bereich kleinster Lastströme, d. h. etwa bis zum Leerlaufstrom des vom Gleichrichter gespeisten Motors, vorliegt. Schon kurz oberhalb des Leerlaufstromes des Motors sind dieKerne des Gleichstromwandlers so weit gesättigt, daß die volle Wechselspannung seines Sekundärstromkreises gleichgerichtet der Relaiswicklung zugeführt wird und an dieser liegt. Eine weitere Steigerung des Gleichstromes in der Primärwicklung des Gleichstromwandlers ist dann für das Relais ohne Bedeutung. In Fortsetzung dieses Erfindungsgedankens kann schließlich die Sekundärwicklung des Gleichstromwandlers so bemessen werden, daß sie nur für die damit gekennzeichneten maximalen, vom Relais aufzunehmenden Ströme dimensioniert ist, wodurch der Wickelraumaufwand für diese Anordnung weiterhin erheblich vermindert werden kann.In the case of rectifiers with a number of phases greater than two, the result is now the difficulty that the alternating voltage components at the cathode chokes are generally too small and consequently their area of occurrence is less exactly as defined for two-phase rectifiers. This is according to the invention circumvented that a serving to control the braking resistor relay as Burden of a DC converter lying in the DC circuit is provided. Of the Construction of such a relay using the usual elements and designs is not that easy, since the response limit is then around 5 must be up to roo / o of the nominal operating current. The burden of this converter in shape the resistance of the relay winding is now chosen so that a number of turns Corresponding transformation ratio of the currents only in the range of the smallest load currents, d. H. up to about the no-load current of the motor fed by the rectifier. The cores of the direct current converter are already just above the no-load current of the motor so saturated that the full alternating voltage of its secondary circuit is rectified is fed to the relay winding and is applied to this. Another increase in the Direct current in the primary winding of the direct current converter is then used for the relay irrelevant. In continuation of this inventive concept, the secondary winding can finally of the direct current converter are dimensioned so that they are only used for those marked with it The maximum currents to be absorbed by the relay are dimensioned, which reduces the need for changing rooms can still be significantly reduced for this arrangement.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL5615A DE971264C (en) | 1950-09-28 | 1950-09-28 | Arrangement for braking a DC motor which is fed by a rectifier working with grid-controlled vapor or gas discharge paths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL5615A DE971264C (en) | 1950-09-28 | 1950-09-28 | Arrangement for braking a DC motor which is fed by a rectifier working with grid-controlled vapor or gas discharge paths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE971264C true DE971264C (en) | 1958-12-31 |
Family
ID=7256847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL5615A Expired DE971264C (en) | 1950-09-28 | 1950-09-28 | Arrangement for braking a DC motor which is fed by a rectifier working with grid-controlled vapor or gas discharge paths |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE971264C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1112779B (en) * | 1959-03-19 | 1961-08-17 | Intron Leipzig Werk Fuer Ind E | Arrangement for braking a speed-controlled DC motor, which is fed via a grid-controlled rectifier |
-
1950
- 1950-09-28 DE DEL5615A patent/DE971264C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1112779B (en) * | 1959-03-19 | 1961-08-17 | Intron Leipzig Werk Fuer Ind E | Arrangement for braking a speed-controlled DC motor, which is fed via a grid-controlled rectifier |
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