FACTORY OF ELECTRIC APPARATUS EMA - ELFA Sp. z o.o. st Pocztowa 7, 63-500 Ostrzeszow, PL phone: +48 62 730 30 51 fax: +48 62 730 33 06 [email protected] www.ema-elfa.pl ELECTROMAGNETIC DISC BRAKES STE and STK SERIES WITH CONSTANT BRAKING TORQUE THEATRICAL VERSION

Spring actuated and electromagnetically released disk brake type STE and STK. Designed for braking rotating machine parts and their precision positioning, in all applications where the drive is required to have limited level of noise. The specifics of this type of drive has made us draw up a brake version whose crucial units are so designed that the “quiet operation” requirement demanded by the user is fulfilled. Drives fitted with brake series STE or STK can be used in objects where limited level of noise has huge significance, e.g. theatres, concert halls, etc. where, as stage equipment drives, they...

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...

Circuit PS-1 is built on the basis of MOSFET type semiconductor technique which enabled achieving effects not available in traditional designs. The brake electromagnet energized through circuit of this construction enables the brake to achieve connection and disconnection time parameters analogous to breaking of circuit on direct current side. The parameters obtained are not however gained through utilization of additional electrical circuits and switches. Simplicity of installation and parameters achieved enable very wide application, particularly in cases requiring positioning of drives, operation with...

Having in mind the user who requires the control of the brake, we have designed special signaling and control circuits, which enable to control the state of the brake (engaged, disengaged) and the wear of the plate lining. The usage of these circuits enables to control the brake with the use of automatic elements, which ensure high level of safety and reliability. Due to its compact design, the microswitch can be used in any other applications, as long as its parameters meet design requirements. Response monitoring microswitch - KZ - control of the state of brake (engaged, disengaged), Microswitch...

_CLIMATIC VERSION_ ACCORDING TO STANDARDS: e.g. MT, TH NOMINAL BRAKING TORQUE [Nm] PROTECTION RATING Execution options for the customer's request: - non-standard diameter of the sleeve gear brake d(H7) - posistor thermal protection - P - bimetallic thermal protection - B - other voltage brake - response monitoring microswitch (engaged, disengaged) - KZ - microswitch of the brake lining control - KO - microswitches set - KZ+KO