Aircraft brake VFDB series

Overview - NBE Brake Series
NBE brakes are designed to operate in dynamic situations. Unlike conventional motor holding brakes that prioritize static friction and are applied at zero rpm, NBE brakes deliver rated dynamic torque comparable to static torque to stop dynamic loads without upsizing. Each NBE is tested for dynamic torque on dedicated PT Tech test stands under extreme conditions prior to shipment.

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

Overview - VFDB Brake Series
VFDB brakes are designed to operate in dynamic situations and address low-frequency friction-induced vibration that can occur during high-speed stops, protecting drive components and motor shafts. VFDB models are validated on PT Tech test stands for dynamic torque performance.

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
Other data: not specified on page (fields blank for some VFDB sizes)

VFDB1000
Static Torque New: 10,000 Nm
Other data: not specified on page (fields blank for some VFDB sizes)

Technical characteristics

• Product families: NBE Brake Series (motor-mounted dynamic brakes) and VFDB Brake Series (dynamic motor-mounted brakes addressing friction-induced vibration).
• NBE design intent: provide rated dynamic torque equal or comparable to static torque to stop dynamic loads without upsizing; validated via test stands prior to shipping.
• VFDB design intent: address low frequency friction-induced vibration during high-speed stops to protect drive components and motor shafts; validated via test stands prior to shipping.
• Key electrical parameters (VFDB models): Holding Voltage typically 50V DC Min; Excitation Voltage typically 205V DC Min.
• Air gap specification (VFDB models): Min/Max 0.8/2.0 mm.
• Speed ratings: NBE models up to 4,000 rpm (NBE230/NBE330); other NBE models rated 3,600 rpm. VFDB max freewheeling/engagement speeds vary by model (examples listed per model above).
• Torque and energy ratings: detailed per model above (static torque, min static torque, dynamic torque, rated brake energy where provided).
• Mechanical data included where available: inertia and mass values are provided for several VFDB models (examples listed per model above).