Electromagnetic Spring Applied Fail Safe Brake AC Brake Type

Electromagnetic Spring Applied Fail Safe Brake

A. C. Brake Type AC

FEATURES

Strong Structure.
Quiet Operation (<70 dBA).
Simple Assembly and Installation.
Aluminum die cast housing hence very good heat dissipation. Adjustable Torque.
Optional Manual release and dust seal.
Epoxy Resin Bonded Vibration Proof coil. Class F Insulation. Options of friction plate & mounting flange to facilitate Installation. IP 64 Protection against dust and water sprinklings.

SALIENT FEATURES

Very fast switching times, High Operating frequencies and reliability
No Risk of coil burn out.
Direct acting without solenoid or linkages. Very light and compact.
Cost saving as transformer/rectifiers not needed.
Interchangeable with our and most other D.C. Brakes without modifying mounting at customers End.

OPTIONAL ATTACHMENTS :-

Dust Seal :- It prevents penetration of dust or other fragments into the braking area. The dust seal is pulled over the brake and inserted into the grooves provided.

Hand Release :- The hand release, releases the brake manually and it automatically goes back into its original position after operating.

Friction Plate :- We recommended to use the friction plate when a plain machined counter face is available but cannot be used as a friction surface. The friction plate can also be combined with the dust seal.

Mounting Flange :- We recommend to use the mounting flange when no suitable friction surface is available. It can also be combined with the dust seal.

OPERATION :

The Brake is designed to ensure safety due to the Braking torque being always applied by means of pressure springs when no voltage is applied to the brake and it is thus normally in ON condition. Upon Energisation of the Electromagnet by applying a A.C. Voltage the Armature Plate is pulled towards the Electromagnet thus loading the pressure springs and allowing the Disc which is axially movable on the Hub to rotate freely. When the current is stopped the pressure springs push the Armature Plate towards the disc which in turn is pressed against the mounting flange or friction plate or the motor cover itself which is stationery and thus the rotational movement is stopped due to friction, thus Braking the motor shaft.

SELECTION OF SUITABLE MODEL :

The Brakes are rated by torque and selection of the suitable model can be made by calculating the required torque rating of the Brake and then matching it with the static torque rating. Although the calculation of torque is based on various factors an approximate evaluation can be made using the following formula.

Torque (NM) = [9550 x (K.W. / R.P.M.)] x Safety factor (sf)

where K.W. = Kilowatts of Motor, R.P.M. = Speed at Brake location.

(sf) = Safety factor depending on type of prime mover and load. For Electric Motor - 2 to 3

Diesel Engine - 4 to 5

Compressor - 5 to 6

However we recommend that you may please kindly contact us for literature on detailed calculation for selection of Brake.

WARNING :- The Brake shall operate optimally as per the above data when operating at room temperature. In case of greasy places or extreme temperature please contact our technical department. When operating at low temperature or in damp places its necessary to use covers or guards to avoid the attachment of the friction material on the braking surface when the brake remains without operating for a long period.

ORDERING :

While ordering please specify.

Model
Operating Voltage
Shaft diameter
Optional Attachments Desired.