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Application — Automatic Door

BLDC Motor For Automatic Door And Gate Drive.

Automatic doors open and close thousands of times a day in commercial buildings, hospitals, retail stores and parking facilities. A brushless DC motor with integrated gearbox and brake delivers the quiet, reliable, maintenance-free operation that door manufacturers and building managers demand. Shenghe builds geared BLDC motors for sliding doors, swing doors, revolving doors, gate operators and barrier gates — 24V and 48V DC for direct battery backup compatibility.

  • 24V / 48V DC — direct battery backup connection
  • Integrated planetary gearbox with electromagnetic brake
  • Quiet operation under 40 dB(A) for indoor use
  • 2+ million cycle bearing life for high-traffic doors
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Why BLDC For Automatic Doors

What Makes Brushless The Standard In Modern Door Automation

  • No brush wear — zero motor maintenance across millions of door cycles
  • Ultra-quiet operation suits hospitals, libraries and hotel lobbies
  • DC voltage enables direct UPS battery backup without an inverter
  • Precise speed profiling for soft open, soft close and hold-open modes
  • Compact geared motor fits inside slim door header profiles
  • Current-based obstacle detection for EN 16005 safety compliance

Typical Automatic Door Motor Spec Range

ParameterRange
VoltageDC 24V / 48V
Rated power50 W — 400 W
Motor speed2000 — 4000 RPM
Gear ratio5:1 — 50:1 (planetary)
Output torque2 Nm — 40 Nm
BrakeElectromagnetic, fail-safe engaged
Noise< 40 dB(A) at rated load
FeedbackHall sensor + incremental encoder

Typical Automatic Door Use Cases

  • Sliding doors: Commercial entrance sliding doors with belt-driven carriages for retail, office and hospital lobbies
  • Swing doors: Electromechanical arm operators for single and double-leaf swing doors in accessible entrances
  • Revolving doors: Low-speed high-torque drives for 3-wing and 4-wing revolving door systems in hotels and airports
  • Gate operators: Cantilever and track-mounted sliding gate drives for commercial and residential perimeter security
  • Barrier gates: Parking lot and toll booth barrier arm operators with fast 1-second open/close cycle
  • Hermetic doors: Airtight sliding doors for hospital operating rooms and clean room environments
  • Industrial sectional doors: Overhead door drives for warehouse and loading dock openings

Technical Details For Door Integration

  • Fail-safe brake: Spring-engaged, electrically released brake holds door position on power loss
  • Soft motion profile: S-curve acceleration and deceleration prevents door slamming and reduces mechanical stress
  • Obstacle detection: Motor current monitoring detects obstructions within 50 ms and reverses direction
  • Compact form factor: Motor plus gearbox fits within 60 mm diameter for slim header installation
  • Temperature range: -20 degC to +55 degC covers outdoor canopy and indoor ceiling plenum mounting
  • Connector interface: Standard 6-pin connector for plug-and-play integration with major door controller brands

Motor For Your Door System?

Send us your door weight, opening width, cycle rate and voltage requirement. We recommend a geared BLDC motor with brake matched to your door operator and quote within one working day. Or request the catalog to evaluate the full door drive range.

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