DE1563975C

DE1563975C -

Info

Publication number: DE1563975C
Application number: DE19651563975
Authority: DE
Priority date: 1964-03-28
Filing date: 1965-03-29
Publication date: 1973-02-01

Description

aber begrenzt. Ohne elektrische Speisung können derartige Motoren eine aktive Bremskraft nicht zuverlässig ausüben. Das begründet bei Stromausfallbut limited. Such motors cannot actively brake without an electrical supply exercise reliably. This is justified in the event of a power failure

in denen Fahrzeuge abgebremst werden sollen, im stromlosen Zustand über· einen Bremswiderstand kurzschließbar sind und daß die Elektromotoren perschlußläufermotoren oder aber auch durch fremder- 40 manenterregte Gleichstrommotoren sind,
regte Gleichstrommotoren erzeugbare Bremskraft ist Der permanenterregte Gleichstrommotor setzt imin which vehicles are to be braked, can be short-circuited in the de-energized state via a braking resistor and that the electric motors are short-circuit motors or also externally excited DC motors,
The permanent-magnet DC motor sets the braking force that can be generated by excited DC motors

Gegensatz zum fremderregten Gleichstrommotor einem von außen aufgebrachten Drehmoment im kurzgeschlossenen Zustand ein größtmögliches Geein Gefahrenmoment in Gefällestrecken, sofern nicht 45 gendrehmoment auch ohne ..jede Fremdspeisung entzusätzliche Notbremsen vorgesehen sind. Das Einhai- gegen. Es ist eine starke Bremsung der Fördereinheit ten niedrigster Geschwindigkeiten in einem Gefälle ohne elektrische Speisung des Motors ermöglicht, so oder einer Steigung ohne zusätzliche Bremseinrich- daß eine solche Fördereinheit auf kurzgeschlossenen tungen ist praktisch auch nicht möglich, da kein Stromschienen sofort .zum. Stillstand kommt. Die Strom zugeführt und daher die Bremskraft des Mo- 50 Bremskraft ist sogar so groß, daß eine Fördereinheit tors bei kleinen Drehzahlen ausfallen würde. Das auch im geneigten, sogar im vertikal angeordneten Bremsen muß also von anderen Bremseinrichtungen Streckenabschnitt fast bis zum Stillstand abgebremst der Fördereinheiten übernommen werden. Bei der werden kann. Um in einer-Gefällestrecke eine vorbebekannten Elektroförderbahn ist die Steckeinrichtung stimmte Geschwindigkeit, einhalten zu können, ist es relativ aufwendig, da zur Speisung des Kurzschluß- 55 zweckmäßig, wenn der Bremswiderstand betriebsmäläufennotors drei Stromschienen erforderlich sind. ßig einstellbar ist. '.: ' .^:' C..'.^:. In contrast to the separately excited DC motor, an externally applied torque in the short-circuited state provides the greatest possible risk of danger on downhill stretches, unless additional emergency brakes are provided even without any external power supply. The one-off against. A strong braking of the conveyor unit at the lowest speeds is possible on a downhill slope without electrical power supply to the motor, or on a slope without additional braking equipment. Standstill comes. The current supplied and therefore the braking force of the engine is even so great that a conveyor unit would fail at low speeds. That also in inclined, even vertically arranged braking has to be taken over by other braking devices of the route section, braked almost to a standstill, of the conveyor units. When can be. In order to be able to maintain the correct speed on a downhill stretch of a previously known electric conveyor, the plug-in device is relatively expensive, since it is expedient to supply the short-circuit 55 when the braking resistor operating motor three busbars are required. is adjustable. '.: '. ^: 'C.. '. ^: .

Eine elektrodynamische Bremsung ist von Groß- An sich werden Gleichstrommotoren wegen ihrerElectrodynamic braking is essential. DC motors are in themselves because of them

bahnen mit einzelnen gleichstrombetriebenen Förder- starken Überlastbarkeit .beim Anfahren für Kleineinheiten und Fahrleitungen bekannt, die zum Brem- förderbahnen bevorzugt."Die Verwendung eines persen der Fördereinheiten in elektrische Abschnitte mit 60 manenterregten Gleichstrommotors hat aber den zujeweils einem zugeordneten Bremswiderstand unter- sätzlichen bekannten Vorteil, daß er wegen des Fortteilt sind (deutsche Patentschrift 265 311). In einer falles der Fremderregung weniger Strom verbraucht.Railways with individual DC-operated conveyors - strong overload capacity. When starting up for small units and contact lines, which are preferred for braking conveyors. "The use of a persen of the conveyor units in electrical sections with 60 man-excited DC motors but each has the an associated braking resistor additional known advantage that it divides because of the are (German patent specification 265 311). In a case of external excitation, less electricity is used.

Claims

Claim:

1. Braking device for a rail-mounted small conveyor belt driven by electric motors with power supply to the vehicles via individually switchable contact line sections, characterized in that individual contact line sections in which contact line

first series of sections. At a stop, the current strength of the overhead contact line sections which are under current is reduced by continuously increasing resistances. In a second series of sections in front of the stop, resistance or short-circuit braking takes place, with ¹ decreasing from section to section Resistors maintain the amperage of the braking current with decreasing driving speed

witnesses are to be braked, in the de-energized io, in order to thereby stop the conveyor unit Bring the state .. briefly via a braking resistor. . . . ,. \ ■

are lockable and that the electric motors per- without additional. mechanical brakes, is a

Complete stopping on a sloping section of the route is not possible, however, because

are man-excited DC motors.

2. Braking device according to claim 1, characterized

characterized that the braking resistor is 15 a stationary electric motor also in the short circuit,

is adjustable in terms of drive. ■ d. H. no braking torque available without external power

;, - · ,,; .. can bring.

In the case of small conveyor systems within the meaning of the invention

many sections of the route run horizontally,

but some also vertical or inclined.

The invention relates to a Bremseinrich- The invention is based on the object of a

device for a rail-bound, by electric braking device for a-rail-bound, through

Small conveyor belt driven by electric motors

gates-driven small conveyor track with power supply to the vehicles via individually switchable Contact line sections.

In a known circular conveyor track of this type, the chassis are characterized by their robustness Squirrel cage motors equipped ("Elektro-Technik" 41st year 1959, pp. 420 to 422). Each-

create that allows a vehicle within a brake safely on a single section. It should also be used in sloping downward sections of the route a uniform, safe, wear-free and preferably adjustable braking effect can be achieved, so that the conveyor units or vehicles with a

of the suitable speed in a disconnected contact line section 30 can go down, upright running gear is automatically controlled on inclines. Of course, this can be done, for example, by mechanical brakes that are applied when the system is switched off

the power supply to the relevant catenary

be interpretation.

Starting from a .. braking device for a

rail-bound small conveyor track of the entrance

management section take effect automatically. If desired, this object is according to the invention But an electric braking would be worth seeing, solved by the fact that individual contact line sections, Ren braking force, if necessary, also continuously from the outside via the relevant contact line section

could be seriously influenced. The short