Wear free tension control without friction
A
ZF Great Britain product story
Edited by the Engineeringtalk editorial team
Jun 7, 2000
New high power brakes enhance ability for contact and wear free tension control without friction and stick-slip.
The ability of ZF's unique hysteresis brakes and clutches to perform precise tension control operations on larger systems has been enhanced with the introduction to the range of new high power brakes.
These can operate with twice the slip power (up to 2000W) of existing units and up to 4 times the slip power for brief (peak) periods.
The hysteresis brakes and clutches provide a cost effective and much simpler alternative to servo systems in precise tension control applications.
Their exact control, and the unique combination of contact free and, therefore, wear free torque transmission, is ideally suited to all manufacturing processes where control of tension is required, e.g the production of endless products such as wire, cable paper and foil.
One of the major advantages of the hysteresis brakes is that they transmit torque via a magnetic flux.
Consequently, there is no physical contact and non of the usual disadvantages resulting from friction.
There is also no fluctuation in friction levels due to external influences, no stick-slip effect and no wear during slip operation.
The hysteresis brakes are used mostly in slip mode, but they also have a holding torque.
In contrast, the clutches transmit torque in both synchronous and slip modes.
A major benefit is that the torque transmitted is dependent only on the current though the armature coil and is virtually speed independent.
The torque is continuously variable and is controlled precisely from zero to the maximum.
The level of equipment and time required to set-up the hysteresis brakes and clutches in comparison with servo systems is minimal.
The slip and synchronous torques of the brakes and clutches are simply set manually in the range from zero up to the maximum value.
The values depend only on the setting of the electric current in the magnetic coil.
The torque set is largely speed-independent and is also effective during standstill.
Because of these factors there are essential differences between hysteresis components and eddy-current units.
In synchronous operation and at standstill the latter units cannot transmit torques.
They are also difficult to control in the lower speed range.
The hysteresis brakes and clutches are part of ZF's Tiratron package.
This also includes a universal electronic control unit that provides users with a variety of operating options.
The simplest of these is basic open loop control, without any form of feedback.
For applications requiring more precise control a number of closed loop control options are available.
These include simple sensing with encoders, and systems with both sensing and the capability to perform calculations and provide feedback variables.
Other major options are closed loop force control, in conjunction with a dancer arm, and closed loop position control.
Hysteresis brake units in ZF high power range are available with (continuous) slip powers in the range from 250 to 2,000 watts.
Peak powers are twice these figures.
The hysteresis clutches for winding-on applications are supplied in four different versions with torques ranging from 0.4 to 12Nm.
The ZF Tiratron range is backed-up by the resources of one of the most respected manufacturers of driveline technology in the world.
Not what you're looking for? Search the site.
Google Ads
Contact ZF Great Britain
Related Stories
- Igus energy-supply system comprises 200 products
- Centa offers bespoke transmission designs
- IMAG assists energy-efficient product upgrade
- AAC offers range of metric Neo-Flex couplings
- Ondrives simplifies online ordering process
Browse by category
-
Capital Equipment (3,533)
- Capital Equipment (1)
- Compressors and Air Treatment (546)
- Electrical hardware (131)
- Electronics Manufacturing, Tools, Instruments (192)
- Machinery and Production Equipment (1,133)
- Manufacturing Machinery and Plant Equipment (478)
- Production line blowers and fans (74)
- Robotics, Handling and Storage (978)
- Consultancy and Services (927)
-
Control and Instrumentation (5,142)
- Cabling, Conduit, Signal Conditioning (818)
- CNC and Motion Controllers (190)
- Control and Instrumentation (3)
- HMIs/Operator Interfaces (297)
- Logic Controllers, Timers and Relays (96)
- Mid-range and Large PLCs (204)
- Plant- and Machine-Wide Communications (1,210)
- Plantwide control (1,354)
- Power Supplies, Uninterruptible Power (577)
- Smaller-Sized PLCs (393)
-
Drives, Motors and Controls (3,450)
- Drives, Motors and Controls (2)
- Industrial Drives/Controls (1,293)
- Industrial Motors (502)
- Linear Drives and Motors (121)
- Precision Motors and Gears (434)
- Stepper and Servo Drives, Motors, Controls (1,096)
-
Electrical and Electronic Equipment Design (4,327)
- Batteries, chargers and circuit protection (588)
- Connectors, Terminals, Busbars, Slip Rings (724)
- Electrical and Electronic Components (652)
- Electrical and Electronic Equipment Design (4)
- Electrical and Electronic Subassemblies (377)
- Enclosures and Equipment Cooling Fans (722)
- Knobs, Handles and Enclosure Hardware (430)
- PCs and Embedded Systems (830)
-
Engineering Design Software (6,388)
- 2D CAD software (203)
- 3D CAD software (1,199)
- CAM, CNC, production management software (583)
- Data, document management software (324)
- Electrical design software (168)
- Engineering Design Software (17)
- FEA and structural analysis software (377)
- File conversion software, data capture (358)
- Fluid, thermal, noise, vibration software (340)
- Materials design and moulding design software (153)
- Maths, charting, statistics, QA software (325)
- PLM and collaboration software (665)
- Process, instrumentation, automation software (269)
- Publishing and documentation software (234)
- Rendering, visualisation, styling software (208)
- Simulation, modelling, validation software (965)
-
Engineering Industry News, Resources (6,199)
- Electronic Resources for Engineers (273)
- Engineering Business News, Views (388)
- Engineering Conferences (438)
- Engineering Education, Resources, Standards (851)
- Engineering Exhibitions, Events (578)
- Engineering Guides, Newsletters (354)
- Engineering Industry Developments, Awards (635)
- Engineering Industry News, Resources (4)
- Engineering Industry Reports, Surveys (597)
- Engineering Recruitment, Employment (219)
- Engineering Seminars (421)
- Engineering Training Courses (458)
- Health and Safety Consultancy, Software (180)
- Health and Safety Events, Training, News (285)
- Health and Safety Legislation (403)
- Health and Safety Strategy, Risk Assessment (115)
- Machine Building (4,633)
-
Materials and Processing (3,041)
- Materials and components (2,272)
- Materials and Processing (5)
- Materials processing and testing (292)
- Rapid Prototyping (472)
-
Monitoring, Measurement and Quality (5,681)
- Data Acquisition Hardware and PC I/O Boards (491)
- Data acquisition Software and Communications (505)
- Data loggers (428)
- Electrical and Electronic Testing, PAT Equipment (645)
- Form/co-ordinate, optical, vision instruments (766)
- Gauges, Indicators and Instruments (449)
- Materials testing equipment (439)
- Monitoring, Measurement and Quality (1)
- Telecomms/network test equipment, software etc (159)
- Testing and Calibration Services and Information (522)
- Testing, analysing and monitoring equipment (1,276)
-
Powertrain Design (3,723)
- Bearings (986)
- Chains and belts (334)
- Gears, brakes, couplings and engines (1,482)
- Hydraulic Components (475)
- Lubricants (441)
- Powertrain Design (4)
-
Sensors (7,319)
- Accelerometers and Vibration Sensors (450)
- Barcode Sensors (103)
- Flowmeters and Flow Sensors (650)
- Gas, Chemical, Radiation, Magnetic Sensors (294)
- Humidity and Environmental Sensors (158)
- Level Sensors and Leak Detectors (539)
- Linear Position Sensors (417)
- Loadcells, Force Sensors, Torque Sensors (732)
- Pressure sensors (643)
- Proximity Sensors (715)
- Rotary Position, Tilt and Angular Sensors (565)
- Sensors (12)
- Temperature sensors (624)
- Vision and Colour Sensors (1,417)
- Small Mechanical Components, Joining, Tools (2,057)
- Valves, Pumps, Process Hardware (3,732)
