Purchase now: Bonfiglioli BN 63B 2 AC Electric Motor
Purchase now: Atlantechdrives provides you the BN 63B 2 230/400-50 IP55, an ultra-compact, high-speed three-phase asynchronous AC induction motor expertly engineered by the global power transmission specialists at Bonfiglioli. Designed to comply strictly with IEC international standards, the BN series is universally recognized for its unparalleled durability in severe industrial applications, even at fractional horsepower levels. This specific model is built on an incredibly small IEC 63B aluminum frame. The «B» designation indicates an extended (Long) stator core compared to the 63A, delivering higher power output within the exact same micro-footprint. Most importantly, it features a highly specialized 2-pole stator winding. Operating at a standard 50Hz frequency, it delivers a blistering synchronous speed of 3000 RPM (typically running around 2750-2820 RPM under nominal full load). This extremely high base speed makes it the absolute ideal prime mover for micro-applications requiring rapid rotation rather than high starting torque, such as small centrifugal fluid pumps, high-velocity industrial cooling fans, fractional high-speed compressors, and precision spindle drives. Enclosed in a thermally optimized housing with an IP55 protection rating, it effectively repels factory dust and low-pressure water jets.
Technical Specifications of the BN 63B 2 Motor
Despite its small size, this motor utilizes premium-grade copper windings and high-quality Class F insulation, ensuring it can withstand significant internal heat generation without electrical breakdown. The dynamically balanced rotor guarantees silent, vibration-free operation even at its maximum rated velocity of 3000 RPM.
- Part Number: BN 63B 2 230/400-50 IP55
- Motor Type: 3-Phase AC Induction Motor
- Frame Size: IEC 63B (Ultra-compact lightweight aluminum construction)
- Number of Poles: 2-Pole (3000 RPM synchronous speed at 50Hz)
- Voltage Requirement: 230V Delta (Δ) / 400V Star (Y)
- Frequency: 50 Hz
- Protection Rating: IP55 (Dust-tight and water jet protected)
- Cooling Method: IC411 (Totally Enclosed Fan Cooled – TEFC)
Expert Installation Advice: 2-Pole Dynamics and Terminal Wiring
Understanding the mechanical output and electrical wiring of your motor is critical for preventing catastrophic machine failure. Expert Tip: Standard industrial motors are typically 4-pole (1500 RPM). Because this is a fractional 2-pole motor (3000 RPM), it runs exactly twice as fast but provides half the rotational torque for the same power rating. You must never blindly replace a broken 4-pole motor with a 2-pole motor without verifying your gearbox ratios, as the suddenly increased speed will violently overload the driven system. Furthermore, the motor’s nameplate explicitly states «230/400V». If your factory provides a standard 400V 3-phase power supply, you must arrange the brass terminal links inside the junction box into the «Star» (Y) configuration. Incorrectly wiring this motor in Delta (Δ) at 400V will melt the internal copper insulation within seconds, causing a severe short circuit.
Maintenance and Bearing Lifespan at High RPM
The BN 63B 2 is a high-speed machine. Operating continuously near 3000 RPM places significantly more friction and mechanical stress on the internal ball bearings than standard 1500 RPM motors. Routine auditory checks are highly recommended to prevent unexpected downtime. Because it is a TEFC (Totally Enclosed Fan Cooled) motor, the rear plastic fan is directly attached to the rotor shaft and spins incredibly fast. You must ensure the rear fan cowl remains completely free of dust, lint, or debris blockages. Any airflow restriction will cause the compact motor to rapidly overheat, destroying the factory-sealed bearing grease.
Frequently Asked Questions (FAQs)
Q: Can I safely run this 50Hz micro-motor on a 60Hz power grid?
A: Yes. Most Bonfiglioli 50Hz motors can safely operate on a 60Hz grid. However, because it is a 2-pole motor, the synchronous speed will increase by a massive 20% to an incredible 3600 RPM. You must ensure your driven machinery can safely handle this increased rotational velocity.
Q: What does the «B» mean in the 63B frame size?
A: The IEC 63 frame size dictates the physical external dimensions (shaft height). The «B» designates the specific high-power rating (extended internal core length) within that 63 frame geometry, providing more torque than the standard 63A model.
Do you need more references from this brand? Explore our full catalog of Bonfiglioli here.
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