Description
Otis Do3000 Door Motor PMSM Brief Introduction
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Product Name |
Otis Do3000 Door Motor PMSM |
| Model Number | BM14794 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis DO3000 Door Motor PMSM BM14794 – Silent, Vector-Controlled Power for Every Door Cycle | Nanjing Zhuye Elevator Parts
Every elevator ride ends with a whisper — the soft click of a door that opens exactly on level and closes without a sound. Behind that whisper is the Otis DO3000 Door Motor PMSM BM14794, a 400 W permanent-magnet synchronous motor that turns 24 V DC into silky, vector-controlled torque. Rated 1.2 Nm peak and 0.4 Nm continuous, it drives side or centre-opening doors up to 1 400 mm wide at 0.4 m/s — all while regenerating braking energy back to the bus. When it hesitates, doors rebound, nudge endlessly or trigger “Door Drive Fault”. Nanjing Zhuye Elevator Parts keeps genuine BM14794 motors complete with encoder, key and IP65 cable — ready for next-day despatch worldwide — helping you restore whisper-quiet motion without costly OEM delays.
Product snapshot
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Otis part number BM14794, hardware rev. D3000-ABG5, firmware DO-30.7
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400 W PMSM, 24-48 V DC, 0.4 Nm continuous, 1.2 Nm peak, 3 000 rpm
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1 024 ppr incremental + Hall sensors, auto-learning in 60 s
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IP65 aluminium housing, e-coat anti-corrosion, −25 °C to +70 °C
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B5 flange, 90 mm frame, 14 mm shaft, key 5 × 5 × 25 mm, weight 2.1 kg
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Lifetime 3 million cycles, < 45 dB(A) at 0.4 m/s, regenerative braking capable
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Otis DO3000 side-opening and centre-opening operators up to 1 400 mm clear width
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Gen2® Switch, Gen2® Life, 4200/5200 modernisation packages
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Any car requiring < 45 dB(A) noise and ±1 mm door repeatability
Installation method – 30-minute precision swap
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Place lift on inspection mode; open doors manually; switch OFF local breaker; lock & tag.
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Remove operator cover; release belt tensioner; photograph encoder and power connectors.
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Release brake; remove coupling bolts; slide old motor out using puller.
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Clean shaft end; check for burrs — dress lightly with 400 grit.
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Insert BM14794 until key seats; torque M6 flange bolts to 8 Nm in star pattern.
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Install key, coupling, belt; tension to 2 % of length (deflection 6 mm at 300 mm span).
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Connect 24-48 V DC (brown +, blue −), encoder (8-pin), brake 24 V; verify Hall LED blinks.
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Power up; run auto-learn via Otis DO Tool (ODT-30); 60 s cycle learns inertia and friction.
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Execute 50 continuous cycles; verify temperature < 55 °C on flange and no fault codes.
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Apply torque-stripe paint; log serial number and date in maintenance book.
Replacement cycle & preventive maintenance
Otis bulletin SB-DO-MOT-2024-03 recommends:
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Visual inspection every 6 months: check for oil, loose bolts, bearing noise.
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Encoder test every 12 months: jitter < 0.1°, Hall phase error = 0.
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Replace entire motor every 3 million cycles or 10 years in high-duty.
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Immediate replacement if:
– encoder jitter > 0.5°,
– bearing noise > 55 dB(A) or temperature > 65 °C,
– brake lift-off current > 120 % baseline,
– belt slips after re-tension (coupling worn).
Pro tip: 70 % of premature failures are traced to over-tensioned belt — keep deflection at 2 % of span.
Maintenance tips from Nanjing zhuye elevatorparts
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Always use Otis K96 grease; generic grease hardens and causes squeaks.
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Never pressure-wash the motor; water kills IP65 in minutes.
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Keep a spare BM14794 in every service van; at 2.1 kg it costs less than one callback.
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After heavy rain, run 5 cycles and check bearing temperature < 55 °C.
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Order the “Motor Kit” (BM14794 + coupling + key + calibration certificate) from nanjing zhuye elevatorparts to eliminate parts hunting and ensure matched components.
Why buy from nanjing zhuye elevatorparts?
We are an Otis-authorised distributor, importing BM14794 directly from the Czech factory, balancing every rotor and testing vector compatibility at 3 000 rpm. Motors are shipped with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse keeps 300+ units in stock; orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at five pieces; we can pre-install the encoder and include a loaner motor to keep your doors moving during the swap.
Conclusion
The DO3000 Door Motor PMSM BM14794 is the silent muscle that turns every door cycle into a soft, precise event. By installing the genuine unit, maintaining correct belt tension and replacing it before bearings howl, you ensure every entrance is silent, every stop is level, and every passenger steps in with confidence. Stock genuine BM14794 from nanjing zhuye elevatorparts today — because when the motor stops, the door stops.
