Braking And Release; Project Planning Notes; Brake Torque Reduction; Optional Configuration - INTORQ BFK458 Originalbetriebsanleitung

Product description
3.4

Braking and release

During the braking procedure, the inner and outer springs use the armature plate to press the rotor (which
can be shifted axially on the hub) against the friction surface. The asbestos-free friction linings ensure high
braking torque and low wear. The braking torque is transmitted between the hub and the rotor via gear teeth.
When the brakes are applied, an air gap (s
lease the brake, the coil of the stator is energised with the DC voltage provided. The resulting magnetic
flux works against the spring force to draw the armature plate to the stator. This releases the rotor from the
spring force and allows it to rotate freely.
3.5

Project planning notes

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When designing a brake for specific applications, torque tolerances, the limiting speeds of the rotors,
the thermal resistance of the brake, and the effect of environmental influences must all be taken into
account.
¾
The brakes are dimensioned in such a way that the specified rated torques are reached safely after a
short run-in process.
¾
However, as the organic friction linings used do not all have identical properties and because environ-
mental conditions can vary, deviations from the specified braking torques are possible. These must be
taken into account in the form of appropriate dimensioning tolerances. Increased breakaway torque is
common in particular after long downtimes in humid environments where temperatures vary.
¾
If the brake is used as a pure holding brake without dynamic load, the friction lining must be reactiv-
ated regularly.
3.6

Brake torque reduction

For the basic module E, the spring force and thus the brake torque can be reduced by unscrewing the
central torque adjustment ring.
3.7

Optional configuration

3.7.1

Hand-release (optional)

To temporarily release the brake when there is no electricity available, a hand-release function is available
as an option. The hand-release function can be retrofitted.
3.7.2

Optional micro-switch

The micro-switch is used for the release monitoring or for wear monitoring. The user is responsible for ar-
ranging the electrical connection for this optional micro-switch.
¾
Usage for the (air) release monitoring: The motor will start only after the brake has been released. This en-
ables the micro-switch to monitor for errors (e.g. when the motor does not start because of a defective rec-
tifier, if there are broken connection cables, defective coils, or an excessive air gap).
¾
Usage for monitoring wear: The brake and motor are not supplied with power when the air gap is too
large.
3.7.3

Optional CCV

The Cold Climate Version (CCV) allows the brake to be operated at lower ambient temperatures.
INTORQ | BA 14.0168 | 08/2019
) is present between the stator and the armature plate. To re-
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