Motor Mounted Brakes
NBE Brake Series
NBE brakes are designed to operate in dynamic situations. Existing motor brakes are designed as holding brakes, to be applied when the VFD has brought the motor to zero rpm. Their friction material is specifically formulated to have a high static friction coefficient. Typically, this is accomplished at the sacrifice of the dynamic friction coefficient. At 1500 rpm motor speed, the typical motor brake has about 50% of its static torque.
Therefore, a design engineer is faced with a dilemma, select a brake on static torque for the sake of design cost or significantly upsize the brake to handle the dynamic torque. The NBE brake eliminates this dilemma. If there is the potential for a critical situation in which the motor brake has to stop a dynamic load to avoid serious consequences, then the NBE brake is the best choice. To assure performance and validate each NBE’s dynamic torque, PT Tech tests these brakes under extreme operating conditions on our extensive line of test stands prior to shipping.
NBE brakes are the only motor mounted brakes to address the issue of low frequency friction-induced vibration during high-speed stops that can damage expensive drive components, including bending motor shafts.
NBE230
| Rated Static Torque New | 1,920 Nm |
| Min Static Torque | 1,560 Nm |
| Rated Dynamic Torque New | 1,920 Nm |
| Rated Speed | 4,000 rpm |
| Rated Brake Energy 5/HR | 510 kJ |
NBE330
| Rated Static Torque New | 2,880 Nm |
| Min Static Torque | 2,350 Nm |
| Rated Dynamic Torque New | 2,880 Nm |
| Rated Speed | 4,000 rpm |
| Rated Brake Energy 5/HR | 764 kJ |
NBE245
| Rated Static Torque New | 4,320 Nm |
| Min Static Torque | 3,520 Nm |
| Rated Dynamic Torque New | 4,320 Nm |
| Rated Speed | 3,600 rpm |
| Rated Brake Energy 5/HR | 1,050 kJ |
NBE345
| Rated Static Torque New | 6,480 Nm |
| Min Static Torque | 5,280 Nm |
| Rated Dynamic Torque New | 6,480 Nm |
| Rated Speed | 3,600 rpm |
| Rated Brake Energy 5/HR | 1,570 kJ |
VFDB Brake Series
VFDB brakes are designed to operate in dynamic situations. Existing motor brakes are designed as holding brakes, to be applied when the VFD has brought the motor to zero rpm. Their friction material is specifically formulated to have a high static friction coefficient. Typically, this is accomplished at the sacrifice of the dynamic friction coefficient. At 1500 rpm motor speed, the typical motor brake has about 50% of its static torque.
Therefore, a design engineer is faced with a dilemma, select a brake on static torque for the sake of design cost or significantly upsize the brake to handle the dynamic torque. The VFDB brake eliminates this dilemma. If there is the potential for a critical situation in which the motor brake has to stop a dynamic load to avoid serious consequences, then the VFDB brake is the best choice. To assure performance and validate each VFDB’s dynamic torque, PT Tech tests these brakes under extreme operating conditions on our extensive line of test stands prior to shipping.
VFDB brakes are the only motor mounted brakes to address the issue of low frequency friction-induced vibration during high-speed stops that can damage expensive drive components, including bending motor shafts.
VFDB76
| Static Torque New | 830 Nm |
| Static Torque Worn | 760 Nm |
| Dynamic Torque Worn | 950 Nm |
| Max Freewheeling Speed | 4,000 rpm |
| Max Engagement Speed | 2,500 rpm |
| Holding Voltage | 50V DC Min |
| Excitation Voltage | 205V DC Min |
| Airgap Min/Max | 0.8/2.0 mm |
| Inertia | .06 kg-m2 |
| Mass | 137.4 kg |
VFDB110
| Static Torque New | 1,180 Nm |
| Static Torque Worn | 1,075 Nm |
| Dynamic Torque Worn | 1,300 Nm |
| Max Freewheeling Speed | 3,600 rpm |
| Max Engagement Speed | 2,500 rpm |
| Holding Voltage | 50V DC Min |
| Excitation Voltage | 205V DC Min |
| Airgap Min/Max | 0.8/2.0 mm |
| Inertia | .06 kg-m2 |
| Mass | 137.9 kg |
VFDB160
| Static Torque New | 1,750 Nm |
| Static Torque Worn | 1,600 Nm |
| Dynamic Torque Worn | 1,300 Nm |
| Max Freewheeling Speed | 3,600 rpm |
| Max Engagement Speed | 2,500 rpm |
| Holding Voltage | 50V DC Min |
| Excitation Voltage | 205V DC Min |
| Airgap Min/Max | 0.8/2.0 mm |
| Inertia | 0.245 kg-m2 |
| Mass | 239 kg |
VFDB250
| Static Torque New | 2,750 Nm |
| Static Torque Worn | 2,500 Nm |
| Dynamic Torque Worn | 1,950 Nm |
| Max Freewheeling Speed | 3,200 rpm |
| Max Engagement Speed | 1,900 rpm |
| Holding Voltage | 50V DC Min |
| Excitation Voltage | 205V DC Min |
| Airgap Min/Max | 0.8/2.0 mm |
| Inertia | 0.245 kg-m2 |
| Mass | 240 kg |
VFDB400
| Static Torque New | 4,400 Nm |
| Static Torque Worn | 4,000 Nm |
| Dynamic Torque Worn | 5,000 Nm |
| Max Freewheeling Speed | 2,200 rpm |
| Max Engagement Speed | 1,500 rpm |
| Holding Voltage | 50V DC Min |
| Excitation Voltage | 205V DC Min |
| Airgap Min/Max | 0.8/2.0 mm |
| Inertia | 0.427 kg-m2 |
| Mass | 404 kg |
VFDB630
| Static Torque New | 6,950 Nm |
| Static Torque Worn | |
| Dynamic Torque Worn | |
| Max Freewheeling Speed | |
| Max Engagement Speed | |
| Holding Voltage | |
| Excitation Voltage | |
| Airgap Min/Max | |
| Inertia | |
| Mass |
VFDB1000
| Static Torque New | 10,000 Nm |
| Static Torque Worn | |
| Dynamic Torque Worn | |
| Max Freewheeling Speed | |
| Max Engagement Speed | |
| Holding Voltage | |
| Excitation Voltage | |
| Airgap Min/Max | |
| Inertia | |
| Mass |