DE549448C - Device for maintaining the speed of several AC motors - Google Patents
Device for maintaining the speed of several AC motorsInfo
- Publication number
- DE549448C DE549448C DEA59189D DEA0059189D DE549448C DE 549448 C DE549448 C DE 549448C DE A59189 D DEA59189 D DE A59189D DE A0059189 D DEA0059189 D DE A0059189D DE 549448 C DE549448 C DE 549448C
- Authority
- DE
- Germany
- Prior art keywords
- motors
- motor
- speed
- generator
- maintaining
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/34—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using Ward-Leonard arrangements
Description
Einrichtung zur Aufrechterhaltung der Geschwindigkeit mehrerer Wechselstrommotoren Beim Antrieb von Filmapparaturen, deren Antriebsmotoren von einem Generator gespeist werden, tritt häufig die Schwierigkeit auf, daß beim Zu- und Abschalten eines Motors der andere bereits oder noch laufende Motor sehr erheblich in seiner Geschwindigkeit gestört wird. Werden z. B. Synchronmotoren oder synchronisierte Asynchronmotoren verwendet, so kommt es vor, daß beim Zuschalten eines zweiten Motors die Spannung des Generators derart absinkt, daß sowohl der zweite Motor nicht in Tritt kommt, als auch der erste bereits laufende Motor außer Tritt fällt.Device for maintaining the speed of several AC motors When driving film equipment, their drive motors are fed by a generator are, the problem often arises that when switching a motor on and off the other motor, which is already running or is still running, has a very significant speed is disturbed. Are z. B. synchronous motors or synchronized asynchronous motors is used, it happens that when a second motor is switched on, the voltage of the generator drops so much that the second motor does not come into operation, and the first engine already running falls out of step.
Dieser Nachteil ist gemäß der Erfindung dadurch beseitigt, daß beim Einschalten eines Motors Teile des Erregerwiderstandes des Generators durch Hilfskontakte an dem zugehörigen Motorschalter kurzgeschlossen und beim Ausschalten wieder geöffnet werden. Auf diese Weise wird erreicht, daß gleichzeitig mit dem Zuschalten eines zweiten Motors, noch ehe die Spannung des Generators abgesunken ist, die Erregung des Generators verstärkt und damit die Spannung des Generators trotz seines größeren abzugebenden Stromes aufrechterhalten wird. Der bereits laufende Motor behält infolgedessen seine Drehzahl entsprechend der Frequenz des Generators bei und wird durch das Zuschalten des zweiten Motors nicht gestört.This disadvantage is eliminated according to the invention in that the Switching on a motor Parts of the generator's excitation resistance through auxiliary contacts short-circuited at the associated motor switch and reopened when switched off will. In this way it is achieved that simultaneously with the connection of a second motor, even before the voltage of the generator has dropped, the excitation the generator amplifies and thus the voltage of the generator despite its larger current to be delivered is maintained. As a result, the engine that is already running remains its speed according to the frequency of the generator and is determined by the connection of the second motor not disturbed.
In der Zeichnung sind zwei Einrichtungen gemäß der Erfindung dargestellt. Mit i ist ein Drehstromgenerator bezeichnet. 2 ist die Erregerwicklung, die über einen Regelwiderstand 3 von einem Gleichstromnetz gespeist wird. Der Generator i speist das Netz RST, an welchem die dreiphasigen Wechselstrommotoren q. angeschlossen sind. Die Motoren können durch die Schalter 5 einzeln zu- und abgeschaltet werden. An den Schaltern 5 sind außer den zum Schalten der Motoren erforderlichen Kontakten je zwei Hilfskontakte vorgesehen, durch die jeweils ein Teil des ErregenvJ.derstandes 3 kurzgeschlossen bzw. eingeschaltet werden kann. Während bei der Anordnung nach Abb. i durch die Hilfskontakte der Schalter die einzelnen Teile des Erregerwiderstandes direkt kurzgeschlossen bzw. eingeschaltet werden, geschieht dies bei der Anordnung nach Abb. 2 durch Zwischenschaltung von Relais oder Schützen 6, die ihrerseits von den Schalterhilfskontakten gesteuert werden.In the drawing, two devices according to the invention are shown. A three-phase generator is denoted by i. 2 is the excitation winding that is about a variable resistor 3 is fed from a direct current network. The generator i feeds the network RST, on which the three-phase AC motors q. connected are. The motors can be switched on and off individually using the switch 5. The switches 5 also have the contacts required for switching the motors two auxiliary contacts are provided, through which a part of the energizing state 3 can be short-circuited or switched on. While in the arrangement after Fig. I the individual parts of the excitation resistor through the auxiliary contacts of the switches are directly short-circuited or switched on, this happens with the arrangement according to Fig. 2 through the interposition of relays or contactors 6, which in turn of controlled by the auxiliary switch contacts.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA59189D DE549448C (en) | Device for maintaining the speed of several AC motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA59189D DE549448C (en) | Device for maintaining the speed of several AC motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE549448C true DE549448C (en) | 1932-04-27 |
Family
ID=6941860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA59189D Expired DE549448C (en) | Device for maintaining the speed of several AC motors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE549448C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE760343C (en) * | 1940-06-04 | 1953-07-13 | Siemens Schuckertwerke A G | Arrangement for the electrical control of the prime movers of several power generators working in parallel |
-
0
- DE DEA59189D patent/DE549448C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE760343C (en) * | 1940-06-04 | 1953-07-13 | Siemens Schuckertwerke A G | Arrangement for the electrical control of the prime movers of several power generators working in parallel |
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