FACTORY OF ELECTRIC APPARATUS EMA – ELFA Sp. z o.o. st Pocztowa 7, 63-500 Ostrzeszów, PL phone: +48 62 730 30 51 fax: +48 62 730 33 06 [email protected] ELECTROMAGNETIC DISC BRAKES

Spring actuated and electromagnetically released disk brake type H powered by direct current. Designed for braking rotating machine parts. Utilized as safety brake. High repeatability even with large number of actuations. The brake characterizes relatively simple construction, facility for regulating brake parameters such as braking torque, braking time and also possibility of supply from alternating current source after connecting up a rectifier circuit delivered at customer's request along with the brake. Direct current disk brake – consisting of electromagnet , armature with friction lining...

ELECTRICAL EQUIPMENT A number of modules, ranging from simple circuits with classic designs, to complex assemblies ensuring quick action and drives positioning have been designed to drive the brakes. Relevant brake applications with switching in the primary or secondary circuits are ensured by half- or full-wave rectifiers and fast electronic circuits. The manufacturer recommends to use as low alternating current voltages as possible to supply the brakes. Appropriate choice of the control voltage will prevent or at least limit surges that may occur in power supply circuits. It is not recommended...

Disconnection of power supply on AC side The diagram presents connection of rectifiers to supply circuit of motor. When disconnecting the voltage, the magnetic field causes the coil current to flow further through the rectifying diodes and drops slowly. The magnetic field reduces gradually causing prolonged time of braking action and consequently delayed increase of braking torque. If action time is irrelevant, brake should be connected on the AC side. When switching off, the supply circuits act as rectifying diodes. Disconnection of power supply on DC side The diagram presents connection of...