AT74659B - Lowering brake circuit for electric motors. - Google Patents
Lowering brake circuit for electric motors.Info
- Publication number
- AT74659B AT74659B AT74659DA AT74659B AT 74659 B AT74659 B AT 74659B AT 74659D A AT74659D A AT 74659DA AT 74659 B AT74659 B AT 74659B
- Authority
- AT
- Austria
- Prior art keywords
- brake circuit
- electric motors
- lowering brake
- loads
- lowering
- Prior art date
Links
Landscapes
- Stopping Of Electric Motors (AREA)
Description
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Mn Widerstand von verhältnismässig hoher Ohmzahl parallel geschaltet und letztere bei schweren Lasten verringert wird, indem in diesem Falle ein Teil des Parallelwiderstandes durch das Schütz m in der aus der Fig. 4 ersichtlichen Weise kurzgeschlossen wird.
Gemäss Fig. 3 wird ein von der Ankerspannung abhängiger elektromagnetischer Hilfeschalter b'benutzt. Gemäss Fig. 4 ein Sperrapparat b nach Art der Fig. 2 bzw. der obengenannten Patentschrift. Diese beiden Schaltapparate können sich bei allen Anordnungen gegenseitig ersetzen.
PATENT. ANSPRÛCHE :
1. Senkbremsschaltung für elektrische Motoren, dadurch gekennzeichnet, dass eine unzulässige Geschwindigkeitssteigerung beim Senken schwerer Lasten auf Kontrollerstellungen, welche für leichtere Lasten bestimmt sind, durch eine selbsttätige Schaltvorrichtung stossfrei verhindert wird, indem beim Eintritt einer Bewegung auf den Senkstellungen für schwerere Lasten durch diese Schaltvorrichtung vorbeugend eine die Geschwindigkeit vermindernde Schaltungsänderung (Umschaltung des Zwei- oder Dreiphasenankers in Einphasenschaltung bei Drehstrommotoren, Parallelschaltung von Widerstand zum Anker bei Hauptstrommotoren, Kurzschliessen eines
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leichtere Lasten vorbereitet wird.
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Mn resistance of relatively high ohm number is connected in parallel and the latter is reduced in the case of heavy loads, in that in this case part of the parallel resistance is short-circuited by the contactor m in the manner shown in FIG.
According to FIG. 3, an electromagnetic auxiliary switch b ′ that is dependent on the armature voltage is used. According to FIG. 4, a locking device b according to the type of FIG. 2 or the above-mentioned patent specification. These two switching devices can replace each other in all arrangements.
PATENT. EXPECTATIONS :
1. Lowering brake circuit for electric motors, characterized in that an inadmissible increase in speed when lowering heavy loads on control positions, which are intended for lighter loads, is prevented smoothly by an automatic switching device, in that when a movement occurs on the lowering positions for heavier loads by this switching device preventive changes in the circuit that reduce the speed (switching the two- or three-phase armature to single-phase circuit for three-phase motors, parallel connection of the resistor to the armature for main-current motors, short-circuiting one
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lighter loads are prepared.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE74659X | 1914-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT74659B true AT74659B (en) | 1918-09-10 |
Family
ID=5636854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT74659D AT74659B (en) | 1914-12-19 | 1915-12-20 | Lowering brake circuit for electric motors. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT74659B (en) |
-
1915
- 1915-12-20 AT AT74659D patent/AT74659B/en active
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