DE466453C - Switching method to increase the tractive force in the upper speed range of series-wound motors - Google Patents
Switching method to increase the tractive force in the upper speed range of series-wound motorsInfo
- Publication number
- DE466453C DE466453C DEA47687D DEA0047687D DE466453C DE 466453 C DE466453 C DE 466453C DE A47687 D DEA47687 D DE A47687D DE A0047687 D DEA0047687 D DE A0047687D DE 466453 C DE466453 C DE 466453C
- Authority
- DE
- Germany
- Prior art keywords
- series
- speed range
- switching
- increase
- tractive force
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/10—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/10—Electrical machine types
- B60L2220/30—Universal machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Motor And Converter Starters (AREA)
Description
Schaltverfahren zur Erhöhung der Zugkraft im oberen Drehzahlbereich von Reihenschlußbahnmotoren Bei Schnellbahnen mit verhältnismäßig kurzen Stationsentfernungen müssen die Anfahrzeiten möglichst klein gehalten werden, damit die mittlere Fahrgeschwindigkeit groß wird. Außerdem muß dafür gesorgt werden, daß die Fahrgeschwindigkeit keine unzulässig hohen Werte erreicht, daß also die Motoren nicht durchgehen.Switching method to increase the tractive effort in the upper speed range of in-line train engines For high-speed trains with relatively short distance between stations the start-up times must be kept as short as possible, so that the average driving speed grows big. In addition, it must be ensured that the driving speed is no Inadmissibly high values are reached, so that the motors do not run away.
Bei Schnellbahnen mit Reihenschlußmotoren läßt ' sich eine kräftige Anfahrbeschleunigung erzielen, wenn .entsprechend der Zeichnung durch Abschaltung von Widerstandsstufen die Zugkraft Z entsprechend der Zickzacklinie a b in Abhängigkeit der Fahrgeschwindigkeit v verläuft. Vom Punkte b ab nimmt die Zugkraft des Motors entsprechend der Eigencharakteristik mit größer werdender Geschwindigkeit v nach der gestrichelten Kurve b-c ab. Liegt die maximal zulässige Fahrgeschwindigkeit bei v."" so liegt häufig der Fall vor, daß hier noch kein Gleichgewicht zwischen Motorzugkraft und Fahrwiderstand W vorhanden ist, so daß also der Motor größere Geschwindigkeiten annimmt als zulässig.In the case of high-speed railways with series motors, a powerful starting acceleration can be achieved if, according to the drawing, by switching off resistance levels, the tensile force Z runs according to the zigzag line as a function of the driving speed v. From point b onwards, the tractive force of the motor decreases according to the characteristic characteristic with increasing speed v according to the dashed curve bc. If the maximum permissible driving speed is v. "", It is often the case that there is still no equilibrium between the motor tractive force and the driving resistance W, so that the motor assumes higher speeds than permitted.
Erfindungsgemäß wird sowohl eine größere mittlere Zugkraft während der Anfahrt erreicht, als auch das Durchgehen der Motoren verhindert, indem die Motoren zunächst als Reihenschlußmotoren anfahren, um dann durch Umschaltung außer einer Reihenschlußerregung, die gegebenenfalls Null sein kann, eine Fremderregung zu erhalten, welche mit wachsender Geschwindigkeit bis auf einen fest einstellbaren Endwert geschwächt werden kann.According to the invention, both a larger mean tensile force during the approach, as well as preventing the engines from running away by the First start motors as series motors, then switch to except a series excitation, which can optionally be zero, a separate excitation to get which with increasing speed up to a fixed adjustable Final value can be weakened.
An einem Ausführungsbeispiel möge der Erfindungsgedanke dargelegt werden.The idea of the invention may be presented using an exemplary embodiment will.
Unterteilt man z. B. die Feldwicklung in zwei Teile, so werden bei der Anfahrt zunächst beide Teile in Reihe geschaltet und vom Motorenstrom durchflossen. Der Motor hat Reihenscblußcharakter, und die Zugkraft verändert sich entsprechend der Zickzacklinie a b. Im Punkte b wird derart umgeschaltet, daß nur noch der eine, im allgemeinen der kleinere Teil der Feldwicklung vom Motorenstrom durchflossen wird, während der andere eine Fremderregung erhält, deren Stärke mit wachsender Geschwindigkeit verringert wird. Die Zugkraftcharakteristik verläuft bei entsprechender Verringerung der Fremderregung nach der Kurve b-d. Im Punkte d angelangt, läßt sich die Fremderregung nicht weiter schwächen, der Motor bekommt also vorwiegend Nebenschlußcharakter und, die Zugkraftcharakteristik entspricht jetzt d-e. Wie aus der Abb. z ersichtlich, läßt sich durch passende Bemessung der Fremderregung erreichen, daß ein Durchgehen des Motors nicht möglich ist, da im Punkte f Gleichgewicht zwischen Zugkraft (Z) und Fahrwiderstand (W) vorhanden ist.If one subdivides z. If, for example, the field winding is divided into two parts, both parts are first connected in series and the motor current flows through them. The motor has a series connection character, and the tractive force changes according to the zigzag line a b. At point b, the switch is made in such a way that only one, generally the smaller part of the field winding is traversed by the motor current, while the other receives an external excitation, the strength of which is reduced with increasing speed. With a corresponding reduction in external excitation, the tractive force characteristic follows curve bd. Once at point d , the external excitation cannot be weakened any further, so the motor is mainly given a shunt character and the tractive force characteristic now corresponds to de. As can be seen from Fig. Z, by appropriately dimensioning the external excitation, it can be achieved that the motor cannot run away, since at point f there is an equilibrium between tractive force (Z) and driving resistance (W).
Man hat also bei oben geschilderter Anordnung den Vorteil, daß die mittlere Zugkraft während der Anfahrt größer ist als bei dem reinen Reihenschlußmotor, und daß ein Durchgehen des Motors auf unzulässige Fahrgeschwindigkeiten nicht möglich ist.So one has the advantage with the arrangement described above that the mean pulling force during the start is greater than with the pure series motor, and that it is not possible for the engine to run away to impermissible driving speeds is.
Die oben geschilderte Schaltanordnung läßt sich natürlich in der praktischen Ausführung variieren, so kann man z. B. die Fremderregung durch eine besondere Hilfswicklung erreichen oder nach der Umschaltung das gesamte Hauptfeld zusätzlich fremd erregen.The switching arrangement described above can of course be used in practice Execution vary, so you can z. B. the external excitation through a special auxiliary winding or, after switching over, additionally excite the entire main field externally.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA47687D DE466453C (en) | Switching method to increase the tractive force in the upper speed range of series-wound motors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA47687D DE466453C (en) | Switching method to increase the tractive force in the upper speed range of series-wound motors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE466453C true DE466453C (en) | 1928-10-06 |
Family
ID=6935920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA47687D Expired DE466453C (en) | Switching method to increase the tractive force in the upper speed range of series-wound motors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE466453C (en) |
-
0
- DE DEA47687D patent/DE466453C/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE466453C (en) | Switching method to increase the tractive force in the upper speed range of series-wound motors | |
DE719705C (en) | Regenerative braking device for electric single-phase alternating current traction vehicles | |
DE610756C (en) | Circuit for electrodynamic braking in electrically operated vehicles with direct current series motors or compound motors | |
DE640461C (en) | Regenerative braking device | |
DE532492C (en) | Electrical membrane sound transmitter system | |
DE600638C (en) | Circuit for generating creep speeds in asynchronous motors, especially for loom drives | |
DE483228C (en) | Three-phase induction motor for mountain railway locomotives with a stator winding that can be switched in a pole ratio of 1: 2 | |
DE629941C (en) | Circuit for direct current generators | |
DE919725C (en) | Arrangement to achieve perfect parallel operation to coupled DC shunt machines or separately excited machines | |
DE500384C (en) | Device for starting three-phase motors, which are fed by direct current three-phase current converters and run up at the same time as the converter | |
DE549448C (en) | Device for maintaining the speed of several AC motors | |
DE665531C (en) | Arrangement for braking electrical machines | |
DE350743C (en) | Procedure for checking the air gap of AC motors | |
DE529723C (en) | Device to prevent oscillation of single armature converters | |
DE472204C (en) | Cascade, consisting of an asynchronous main motor working in the subsynchronous area with constant power consumption and independently of the slipping, a commutator rear machine and a commutator auxiliary machine exciting the latter | |
DE747332C (en) | Brake circuit for several series motors, especially rail motors | |
DE644393C (en) | Device for braking AC series motors | |
DE457368C (en) | Switching arrangement for direct current series motors, especially for railway purposes | |
DE632008C (en) | Circuit arrangement for automatic starting and regenerative braking of direct current railway motors | |
DE519820C (en) | Switching arrangement for electric drives, especially for railways | |
AT118517B (en) | Arrangement for operation of vehicle engines connected in series. | |
DE434733C (en) | Device for converting electrical energy into mechanical and vice versa, especially for electrical traction purposes | |
DE350932C (en) | Self-regulating DC machine for operation as a generator or as a motor | |
DE1186944B (en) | Reluctance runner for pole-changing synchronous motor | |
DE497554C (en) | Asynchronous starter motor |