Brushless DC Railway Carriage Fan

BRUSHLESS DC RAILWAY CARRIAGE FAN (SENSORLESS) 110V DC, 400MM SWEEP FIXED TYPE

Specification No. RDSO/PE/SPEC/TL/0021/2005, REV-3, AM-1.

Description :

  • Sensorless BLDC technology ensures high efficiency, reliability, and low maintenance.
  • No carbon brushes or commutators, eliminating wear, sparking, and frequent servicing.
  • DSP-based inverter control provides smooth, precise, and energy-efficient operation.
  • Aluminum motor construction enhances strength, heat dissipation, and durability.
  • Replaceable fire-retardant blades improve safety, longevity, and ease of maintenance.

Technical Specifications :

Parameter Value
System Integration
Application / Mounting Designed for fixed-mount applications in passenger coaches.
Operating supply 110 V DC — compatible with coach battery systems.
Control DSP-controlled inverter with gate drive logic ensures smooth operation.
Controller layout Single controller board for power, protection, and signal generation, with gate driver located near power devices.
Electrical Interface
Voltage Range 90–140 V DC (with up to 15% ripple).
Over-voltage Protection Activates above ~155 V (trips and restarts automatically at ~140 V).
Under-voltage Protection Trips below ~65 V, restarts at ~70 V.
Surge/Spike Withstand Tested to withstand spikes up to 200 V DC for 2 minutes without damage.
Mechanical Design Features
Motor Type Permanent magnet BLDC (no field windings, brushes, or commutator).
Fan Body Deep-drawn MS body conforming to RDSO drawing RDSO/PE/SK/TL/00252002.
Motor Body Material Aluminum alloy LM6.
Mounting 3 holes on a 108 mm PCD, each 9 mm diameter.
Stator Poles: 3 · Slots: 6.
Bearings SKF 6201ZZ or equivalent (NBC/FAG).
Winding & Insulation Copper polyester-imide enameled wire (Class 180 per IS 137308). Class 155 insulating materials & varnish; applied via VPI; cured in oven; insulation resistance ≥ 20 MΩ.
Finish & Color Coding Powder-coated ≥ 60 μm in silver metallic (HAWCOPLAST HVC 100 / MARPOL 9503014). 20 mm dark yellow band for sensorless variant.
Guard Crashworthy guard as per ICF drawing ICF/SK-7-6-158 (latest alteration).
Performance Metrics
Sweep (Fan Size) 400 mm
Air Delivery ≥ 60 m³/min
Max Input Power ≤ 32 W
Max Weight ≤ 7 kg
Service Value ≥ 2 m³/min/W
Noise ≤ 55 dBA