KENDRION (VILLINGEN) GMBH - Industrial drive system

These compact half-wave and bridge rectifiers are ideal for installation in space restricted junction boxes of brake motors. They can be delivered with flying leads or terminals for connection. Various accessories are available to meet different installation requirements.

The Airflex® product line is comprised of a complete range of clutches and brakes designed for industrial applications. First manufactured in 1938 by Thomas Fawick, Airflex® products are recognized around the world as the Original Fawick® Clutch. Today, Eaton‘s Airflex® product line provides solutions for a wide variety of applications ranging from oil rigs to mining shovels to grinding mills to tugboats. Whether your application requires a standard product or a custom solution, the Eaton team is available to assist with all of your product needs. To learn more about how Airflex® products can meet your application requirements, get in contact with Kendrion Industrial Drive Systems.

The PM Line includes permanent magnet brakes in which the braking force is generated by a permanent magnetic field. The brake thus works in a de-energized condition and fulfill the following functions: Holding, positioning and emergency stop. The neutralization of the braking force is effected by the counteracting electric field, granting a high degree of security, even in the case of power failure. Permanent magnet brakes are characterized by a secure, residual-moment-free lifting in any position, and by a backlash-free transfer of the braking torque. Therefore, they are ideal for servo motor applications.

The High Torque series combines the well-known properties of permanent magnet brakes - Due to a re-design of the magnetic circuit, it features further advantages such as a higher torque at identical size and power consumption, high torque constancy throughout the complete service life and an extended temperature range. The High Torque brake is designed to operate dry. The force generated by a permanent magnetic field is utilised to produce the braking effect. To neutralise the braking action, the magnetic flux of the permanent magnets is cancelled by an alternate electromagnetic field (electromagnetically released system). The zero backlash connection between the armature and flange hub ensures zero backlash transmission of the brake torque to the machine shaft (e.g. motor shaft) and reliable release of the High Torque brake with zero residual torque. Thanks to these features, High Torque brakes are ideal for servo motor applications.

Electromagnetic clutches and brakes of Kendrion (Aerzen) GmbH are easy to install and integrate into the machinery concept/layout with no setting up or running in. Kendrion offers a combination fitted on a hollow shaft for applications where clutches and brakes work together. The units are based on the successful magneta components. They are fitted on a through shaft. The unit is fixed using simply two screws and is ready for operation then. Electromagnetic clutches and electromagnetic brakes from Kenrion (Aerzen) GmbH transmit the drive torque and braking torque frictionally in dry running conditions. If a DC current is applied, the torque is transferred without backlash. Residual torque free ventilation in a de-energised state is ensured by the prestressed annular spring of the armature section. The clutches and brakes are suitable for every mounting position and require almost no maintenance.

These overexcitation rectifiers are designed to increase the attractive force and reduce the attraction time of actuating solenoids, to shorten the coupling and disconnection times of clutches and brakes and to decrease the power consumption of clutches, brakes and actuating solenoids. To increase the attractive force, the solenoid is overexcited during the overexcitation time, applying bridge rectified voltage. Then the rectifier changes over to the selected holding voltage which must not exceed the rated voltage of the solenoid.

The rectifier with built-in current sensor for fast turn-off is designed for the operation of electromagnetic devices. It ensures fast turn-on and turn-off. The rectifier with bridge circuit comprises a thyristor and timer. During overexcitation, the rectifier delivers bridge rectified output voltage before changing over to half-wave rectification. On the DC side, the output voltage is enabled by the built-in current sensor which measures the AC current of the connected motor. If the motor is stopped, the rectifier turns off on the DC side as soon as the current falls below the turn-off threshold. The turn-off voltage generated by the inductive load is limited. The rectifier is suitable for connection in parallel with AC motors. The current sensor must be wired into the motor current path in such a way that the current flow created when the motor operates in generator mode will not pass through the sensor. This is crucial to avoid delayed or impaired DC side switching.

The Controller 14.422 serves to excite the magnetic particle clutches and brakes. The excitation current can be influenced by a dancer potentiometer or a master voltage. The built-in current controller ensures that, despite varying coil temperature the current is constant. Other important features of the controller are: Setpoint integrator, control amplifier and temperature monitoring through an optional thermal switch at the magnetic particle clutch or brake. Should the body temperature become too high, the controller simply switches off.

The main characteristic of the magnetic particle clutch is the possibility to smoothly change the torque depending on the field voltage. To transmit the torque from the external to the internal rotor, specifically alloyed and highly abrasion-resistant iron particles are inserted into the particle gap. Depending on the electromagnetic field, these fine iron particles build magnetic chains and thus transmit the torque. The power of the field determines the stability of the particle chains and also the transmittable torque.

Kendrion (Aerzen) Mini Permanent magnet brakes open electromagnetically. The braking torque without backlash is generated by permanent magnets. The brakes can be installed in any position. High quality magnets ensure safe functionality. The rated torque is achieved immediately at the time of delivery without any running-in procedure.