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Brakes - current controlled units

Brakes - current controlled units
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Brakes - current controlled units

Product catalog summary
Overview: The document provides comprehensive technical details on current-controlled hysteresis brakes, focusing on their applications, benefits, and specifications. These brakes are crucial in industrial settings for precise tension control and torque management.

Specifications: Hysteresis brakes are engineered for noiseless, frictionless, and wear-free operation. They deliver torque that remains constant regardless of RPM speed and can be adjusted infinitely. The document details various models, highlighting dimensions and performance metrics such as torque, resistance, and operational speed.

Applications: These brakes are utilized in test benches, actuators, and for tension control in wire, cable, and paper handling equipment. They are also used in load simulation for life testing of motors and gearboxes.

Advantages: Hysteresis brakes offer excellent torque repeatability, a wide speed range, and smooth operation. Their frictionless design extends their lifespan by avoiding wear and seal leakage issues common in other devices.

Operating Principles: The brakes function using a magnetic air gap, with a reticulated pole structure and a steel rotor/shaft assembly. Torque is managed by adjusting the DC current to the field coil, enabling precise control without physical contact.

Technical Data: The document includes tables with detailed technical data for various models, specifying torque, resistance, voltage, RPM, and other parameters. It also provides dimensions for different brake types, including those with large bores for specific applications.

Technical Specifications: Detailed specifications for various models of hysteresis brakes are provided, including torque, working current, resistance, voltage, RPM, possible dissipation, and weight. Models such as LB-250M-2, LB-450M-2, LB-750M-2, and LB-1750M-2 are discussed with their respective technical data.

Applications and Operating Considerations: The brakes are designed for large bore applications and require precise alignment and concentricity between the rotor and case. The document emphasizes maintaining specific tolerances for optimal performance.

Matched Hysteresis Brakes: These brakes are calibrated to ensure consistent performance across multiple units, with deviations in torque/current values kept within ±1.5% at the match point, which should be above 50% of the maximum torque.

Design and Execution Examples: Examples of payoff units with hysteresis brakes are provided, detailing the shaft dimensions and spool compatibility. The document also includes diagrams illustrating the setup and components involved.

Calculation and Selection Criteria: Guidelines for selecting the appropriate brake or coupling size are provided, based on operational parameters such as maximum torque, winding speed, and steady slip-speed.

Ultrasonic Sensors: Specifications for ultrasonic sensors are included, detailing sensing range, repeat accuracy, resolution, and electrical data. The sensors are designed for various environmental conditions and offer features like short circuit protection and reverse polarity protection.

Power Supply and Control: The document outlines the technical data for current-controlled power supplies, including input/output voltage, current, overload protection, and temperature control features.
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Catalog excerpts

Brakes - current controlled units-1

Stromerregte Hysteresebremsen Current Controlled Hysteresis Brakes Stromgeregelte Einheiten Current Controlled Units • Lastmomentgeber für Prüfstände, Ergometer, etc. • Torque load and power absorption in test benches, actuators etc. • Zugkraftregelung beim Ablaufen von Drähten, Kabeln, Seilen, Fäden, Papier und Folien • Tension control with wire, cable, ropes, threads, paper and folies at takeup and payoff equipment • Verwendung als Anlaufkupplung und Überlastschutz sowie Rückdrehbremsung • Use as start coupling for rpm speed up control and as overload protection and braking against backlash • Geräuschlose, verschleißfreie Einheiten • Noiseless, frictionless and wear free working • Drehmoment unabhängig von Drehzahlen • Torque is independent from rpm speed • Drehmoment stufenlos einstellbar • Torque is infinately adjustable

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Brakes - current controlled units-2

Anwendungensbeispiel Applications Hysteresebremsen sorgen für eine genaue Zugregelung während des Wickelprozesses und der Intervalle an schnellen Wickelautomaten. Hysteresis Brakes provide precise control of wire tension during wind, hook and cut operation of high speed automated winding machines. Steuerung Control panel Wickelprodukt Winding product Hysteresebremse Hysteresis Brake Hysteresebremse Hysteresis Brake Drahtvorrat Wire magazine Drahtvorrat Wire magazine Bei Spulen- und Transformatorwickelmaschinen werden Hysteresebremsen eingesetzt, um eine genaue Zugregelung während des Wickelprozesses...

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Brakes - current controlled units-3

Jochring mit Polstruktur Pole structure Wälzlager Anti-friction bearings Erregerspule Field coil Advantages The superior design of these hysteresis devices provide several inherent advantages over magnetic-particle and friction devices. They operate on a frictionless design principle with virtually nor wear. This provides such advantages as: longer expected life, superior torque repeatability, life cycle cost advantages, broad speed range, excellent environmental stability and superior operational smoothness. Operating principles Vorteile und spezifische Eigenschaften Der Vorteil dieser Einheiten...

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Brakes - current controlled units-4

Stromerregte Hysteresebremsen Standard mit beidseitiger Welle Current Controlled Hysteresis Brakes Standard with shafts on both sides Abmessungen / Dimensions (mm) Type *Passfedernut Keyway Technische Daten / Technical Data Type Moment bei Arbeitsstrom Arbeitsstrom Torque at Working current working current (Nm) I 1 (mA) mögliche Verlustleistung Possible dissipation 5 min. (Watt) unterbrochen kontinuierlich non continuous continuous Restmoment Trägheitsmoment ohne Strom Residual torque Rotor inertia without Current (Nm) (kgcm2) 3,53 x 10-4 0,0043 Gewicht Weight

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Brakes - current controlled units-5

Stromerregte Hysteresebremsen Standard mit einseitiger Welle Current Controlled Hysteresis Brakes Standard with shaft on one side Abmessungen / Dimensions (mm) Type *Passfedernut Keyway Technische Daten / Technical Data Type Moment bei Arbeitsstrom Arbeitsstrom Torque at Working current working current (Nm) I 1 (mA) mögliche Verlustleistung Possible dissipation 5 min. (Watt) unterbrochen kontinuierlich non continuous continuous Restmoment Trägheitsmoment ohne Strom Residual torque Rotor inertia without Current (Nm) (kgcm2) 3,53 x 10-4 0,0043

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Brakes - current controlled units-6

Stromerregte Hysteresebremsen ohne Lager mit großer Durchgangsbohrung Current Controlled Large Bore Hysteresis Brakes without Bearings Hysteresebremsen mit großer Durchgangsbohrung werden hauptsächlich für Zugregelung bei Ummantelungsvorgängen, Flechtvorgängen und Flyerarm-Zugregelungen verwendet. Hysteresis Brakes with a large bore are mainly used for tension control at flyer payoff operation equipment, at helical wrapping operation and braiding application. Die Bremsen werden vorzugsweise ohne Lager geliefert, diese sind einbauseitig vorzusehen. Auf Anfrage werden auch diese Einheiten als untereinander...

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Brakes - current controlled units-7

Abgeglichene Hysteresebremsen Matched Hysteresis Brakes Ausführung mit einseitiger oder beidseitiger Welle Abmessungen wie Seite 4 und 5 Execution with shaft on one or both sides Dimensions as on page 4 and 5 Aufgrund der Bauart dieser Hysteresebremsen und ihres Drehmoment/Stromverlaufes ist es möglich mehrere Einheiten für einen Arbeitspunkt als untereinander abgeglichen zu liefern. Die Abweichungen der Drehmoment/Stromwerte betragen dann weniger als ±1,5%. Die Abweichungen an anderen Punkten des Drehmomentverlaufes betragen dann weniger als ±4%. Für Vielfach-Zugregelung und Vielfach-Drehmomentbegrenzungen...

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Brakes - current controlled units-8

Stromerregte Hysteresebremsen mit Untersetzung Current Controlled Hysteresis Brakes with Gear Ratio M10 x 25 auf Lochkreis/on hole circle Ø 100 90° versetzt/displaced (4 x) M8 x 20 auf Lochkreis/on hole circle Ø 140 90° versetzt/displaced (4 x) Technische Daten /Technical Data Torque Arbeitsstrom Working current (mA) zul. Verlusteistung Possible dissipation 5 min. (Watt) unterbrochen kontinuierlich interrupted continuous Spulenhaltegestell mit stromerregter Hysteresebremse Spoolstand with current controlled Hysteresis Brake Dargestellt ist Ausführungsbeispiel 2 (s.u.)* Shown is execution example...

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Brakes - current controlled units-9

Selection Criteria and Calculation Um die passende Bremsengröße oder Kupplungsgröße zu bestimmen, müssen die Arbeitsparameter, wie maximales Drehmoment, Wickelgeschwindigkeit und Dauerschlupfleistung bestimmt werden. Mit diesen Größen findet man in den hier gezeigten Tabellen die passende Type. For calculations to obtain a suitable brake or coupling the operation details such as maximum torque payoff-speed or rpm and steady slip-speed must be known. With these details there can be determined the correct type by means of the given tables. Ablaufgeschwindigkeit/velocity/feed rate V Bahnzug/Drahtzug...

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Brakes - current controlled units-10

Netzteil - stromgeregelt Power supply - current controlled with digital current display nicht belegt Bedienungsanleitung als PDF: Download unter www. mobac.de Manual as PDF: download under www.mobac.de Eingang Eingang -USt +USt Freigabe NotNotbremsung bremsung gecommon schlossen Anschluss Bremsen Rampenfunktion Brake connection Current ramp Technische Daten Technical data Eingangsspannung oder Umschaltung mit Steckbrücke BR3 Input voltage or changeable with bridge BR3 Ausgangsspannung Ausgangsstrom umschaltbar mit Steckbrücke BR2 Output voltage Output current chargeable with bridge BR2 Overload...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.