Stromag Dessau
Stromag Dessau
Stromag Dessau
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Electromagnetic Spring Applied BrakeProtection IP 66 NFF<strong>Stromag</strong> <strong>Dessau</strong>safety in motionCalculationsInitial Torque, size of brake = FLT x Factor (25% - 200%)Example:Full Load Torque = FLTLoad torque = NmTorque = NmPower = kWConstant = 9550Speed = rpmCalculating Maximum Stops per Hour using Braking TablesMotor = 15 kW; 1500 rpmJ = Total inertia of Load + motor = 2.04 kgm 2M L = Load Torque = 20 NmM SN = Brake Torque = 100% FLTMotor FLT = kW x 9550rpm=15 x 95501500= 95.5 NmBrake selection = NFF 10 (100 Nm)KJ perswitching==J x n 21820002.04 x 1500 2182000xx= 25.21 xM SNM SN ± M L100100 + 2010012021 kJ per switchingFrom NFF Table “Permissible heat capacity”, page 7,at 1500 rpmNFF 10 Brake will stop approx. 40 times per hour.To Calculate Stopping TimeExample:Stopping Time =Brake = NFF 10 (100 Nm)Motor = 15 kW; 1500 rpmJ = Total inertia of load + motor = 2.04 kgm 2T L = Load Torque = 20 NmJ x rpm9.55 x (M SN ± M L)Stopping Time =2.04 x 15009.55 x (100+20)Stopping Time = 2.67 seconds + Brake response timeSpring Applied Brake NFF – 02.07.20094
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