Aircraft brake NBE series

NBE Brake Series
NBE brakes are engineered for dynamic stopping applications. Conventional motor-mounted brakes are primarily holding brakes intended to engage after a VFD has brought the motor to zero rpm; their friction material is optimized for high static friction at the expense of dynamic friction. At 1500 rpm a typical motor brake delivers roughly 50% of its static torque, forcing designers to choose between sizing for static torque (cost-optimised) or upsizing significantly to cope with dynamic torque. The NBE series removes this compromise by providing validated dynamic torque performance suitable for critical stopping scenarios.

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 developed for dynamic stopping duties where conventional holding brakes may be insufficient. Like the NBE series, VFDB models are tested for dynamic torque to ensure they can interrupt rotating loads without relying solely on static torque ratings. PT Tech validates each VFDB under demanding conditions on dedicated test stands prior to shipment. VFDB designs also mitigate low-frequency, friction-induced vibration that can occur during high-speed stops and can damage drivetrain components or bend 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: 0.06 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: 0.06 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

VFDB1000
Static Torque New: 10,000 Nm

Technical specifications

• Product family: Motor-mounted brakes (NBE series and VFDB series)
• Primary function: dynamic braking with validated dynamic torque performance
• NBE key feature: dynamic torque comparable to static torque; reduces low-frequency friction-induced vibration during high-speed stops
• VFDB key feature: designed for dynamic stopping with tested dynamic torque and vibration mitigation
• Rated speeds observed: up to 4,000 rpm (NBE230, NBE330); VFDB freewheeling speeds vary by model
• Airgap (VFDB models): 0.8/2.0 mm (typical)
• Electrical (VFDB models): Holding Voltage 50V DC Min; Excitation Voltage 205V DC Min
• Torque range (nominal): ~830 Nm (VFDB76) to 10,000 Nm (VFDB1000)
• Brake energy examples (5/hr): NBE230 510 kJ; NBE330 764 kJ; NBE245 1,050 kJ; NBE345 1,570 kJ
• Mass and inertia: model-specific values listed above
• Each unit tested on dedicated test stands under extreme operating conditions prior to shipment