Electromatic Engineers Pvt. Ltd. Udaipur, Rajasthan

These types of brakes require DC Voltage to release. Switching can be done on either side. However for higher cycle time / faster engagement & disengagement, switching must be carried out on DC side only. To protect contactor points, coil & switches, resistor and capacitor networks must be provided across the contactor to restrict the high restrict the inductive voltage/brake EMF which is produced when power is switched off. Unitorq USB & UMB series brakes are absolutely fail safe in nature, and finds wide range of applications where emergency stop is required. When power fails or brake remains in engaged condition for longer periods of time, these brakes are ideal for the applications. Unitorq D.C. fail safe brake functions on an electromagnetic principle.  

Normally off type clutches operate on D.C. voltage, hence A.C. to D.C. conversion is done by means of a suitable rectifier. Switching of the brake can be on either side. However, once application demands, higher switching frequency / faster engagement and disengagement time, switching must be carried out on D.C. side. To restrict the high inductive voltage / back EMF a suitable supressor and capacitor network is provided across the contactor coil.

Normally off type clutches operate on D.C. voltage, hence A.C. to D.C. conversion is done by means of a suitable rectifier. Switching of the clutch can be on either side. However, once application demands, higher switching frequency / faster engagement and disengagement time, switching must be carried out on D.C. side. To restrict the high inductive voltage / back EMF a suitable supressor and capacitor network is provided across the contactor coil.

Brake Motors are used for various application where instantaneous stopping of the driven load is required. The operation of the brake is "FAIL SAFE TYPE" (USB & UMB series) and are NORMALLY ON. The brake is applied when power to the motor is switched off or power failure occurs. Brake Motor is combination of an AC induction motor and an electromagnetic DC fail safe brake. As shown in the figure brae motor consists of the following : ● AC induction motor (Foot/Flange) ● Electromagnetic DC fail safe brake type USB or UMB. ● Cooling fan after the brake for better heat dissipation and cooling of motor & brake as well. ● Rectifier unit either can be provided near to motor terminal (for AC switching) or given separately to mount them in the control panel (for DC switching). ● manual release is an optional feature and will be provided only with our UMB series brakes.