The magnetic particle clutch respectively brake achieves at a low driving power a high torque being independent of slip speed. It distinguishes itself by a simple structure, low weight and requires little room.
This advantage makes it possible for the clutch resp. brake to be employed in the solution of many technical problems. Appropriate regulation and control devices - as for ex. our LIEDTKE Controller - are needed for the different applications.
Application:
unwinding brakes/winding
torque controls
torque limitations
speed controls
clutch proceedings
start controls
The characteristics of the magnetic particle clutches and brakes are a great advantage in control engineering. By changing the intensity of the exciting current, the torque to be transferred can be adjusted within the range of about 1:50.
Characteristic Charts | Magnetic powder clutches and brakes |
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The torque to be transferred and the exciting current behave to each other just proportionally. In case of a fixed exciting current the torque is independent from the differential speed of the two rotors. When starting, the torque builds up itself time delayed. DC sided switching results in shorter switching times than switching on the mains side. The switching times for the clutches and brakes can be improved when put ting in series an active resistance with the exciting coil.
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Magnetic particle clutches are available with solid shaft and without slip ring transmitter for a range from 0,2 to 5 Nm (Type EFAS) applicable as clutch or brake.
The models with hollow shaft and slip ring transmitters are available for the range from 2 to 1000 Nm, with or without heat sink (Type ERA or Type EAT) depending on how much power is lost by customer application.
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
EFAS 50
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
EAT 20
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EAT 2002
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
ERAT 20
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
ERAT 120-650
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
ERAT 5001
Magnetic particle brakes are available with solid shaft for a range from 0,2 to 5 Nm (Type FAS).
The models with hollow shaft are available for a range from 2 to 1000 Nm, with or without heat sink (Type FAT or Type FRAT) or with water cooling (Type FRATO) depending on how much power is lost by customer application.
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FAS 50
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FAT 20
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FAT 2002
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRAS 21
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRAT 120-650
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRAT 5001
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRATO 2002
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRATO 5001
The standard types are destined for horizontal shaft mounting only.
If vertical shaft mounting is required or if rotation speed >= 40 min-1 is desired, types with remanent rotor (app. "RR") must be installed.
This variant is available in nearly all sizes.
In this version the amount of rest torque is nearly four times as high as in the standard models.
Brakes with heat sink in nearly all sizes can be fitted with external fans.
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRAT 120-650 with fan
![Magnetic particle clutches and magnetic particle brakes Magnetic particle clutches and magnetic particle brakes]()
FRAT 2002 with fan