Bonfiglioli BE 112M 4 AC Electric Motor
Purchase now: Atlantechdrives provides you the BE 112M 4 230/400-50 IP55, an exceptionally rugged, high-efficiency three-phase asynchronous AC induction motor manufactured by the global power transmission experts at Bonfiglioli. Belonging to the advanced BE series, this industrial heavy-duty motor is specifically engineered to comply with the stringent IE2 High Efficiency global energy standards. By utilizing superior electromagnetic design and highly optimized core materials, the BE 112M 4 drastically reduces active electrical losses, significantly lowering factory energy consumption and operational costs during brutal continuous-duty applications. Built on a standardized IEC 112M aluminum frame, the «M» denotes a Medium stator core length. This size is critical, as the 112M frame typically produces around 4.0 kW (5.5 HP), providing a massive jump in horsepower and continuous torque capability compared to smaller 100 frame motors. It features a highly reliable 4-pole stator winding. Operating at a standard 50Hz frequency, it delivers a synchronous speed of 1500 RPM (typically running around 1440-1460 RPM under nominal full load). This 4-pole configuration provides the optimal balance of massive starting torque and operational speed, making it the premier prime mover for driving large heavy-duty worm gearboxes, massive inline helical reducers, high-volume centrifugal fluid pumps, and automated heavy mining conveyors. Protected by an IP55 rating, it effectively repels abrasive factory dust and direct water jets.
Technical Specifications of the BE 112M 4 Motor
The BE series incorporates premium-grade copper windings and precision low-loss electrical steel laminations. This superior internal construction minimizes heat generation, substantially prolonging the lifespan of the Class F insulation and the factory-sealed heavy-duty ball bearings under maximum load.
- Part Number: BE 112M 4 230/400-50 IP55
- Motor Type: IE2 High Efficiency 3-Phase AC Induction Motor
- Frame Size: IEC 112M (Medium core, high torque output)
- Number of Poles: 4-Pole (1500 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: The Star-Delta Starting Protocol
Because the 112M frame size produces substantial mechanical power (typically 4.0 kW), correct wiring at the terminal box is absolutely critical for plant safety and electrical grid stability. Expert Tip: The nameplate of the BE 112M 4 clearly states the voltage as «230/400V». This dictates that the individual copper coils inside the motor stator are engineered to handle a maximum of 230 Volts. If your industrial facility provides a standard 400V 3-phase power supply, you must arrange the three brass bridging links inside the terminal box into the «Star» (Y) configuration to safely distribute the 400 Volts across two coils in series. Furthermore, because of its large size, starting this motor Direct-On-Line (DOL) can cause a massive inrush current spike that might trip your factory’s main breakers or cause severe mechanical shock to your gearbox. It is highly recommended to use a VFD, a Soft Starter, or an automated Star-Delta contactor system to bring this powerful motor up to speed smoothly.
Maintenance and VFD (Inverter Duty) Compatibility
The BE 112M 4 features robust Class F insulation and high-efficiency electromagnetic design, making it highly suitable for use with Variable Frequency Drives (VFDs) to precisely control process speeds. However, it is a TEFC motor (Totally Enclosed Fan Cooled), meaning the rear plastic cooling fan is mechanically driven directly by the rotor shaft. At extremely low frequencies (below 20-25 Hz), the large fan spins too slowly to push adequate air over the heavy aluminum cooling fins, failing to dissipate the heat generated by massive torque loads. If your process requires running the motor at continuously low speeds under heavy load, you must install an external forced-ventilation fan (servo-fan) to prevent the windings from overheating.
Frequently Asked Questions (FAQs)
Q: What is the main difference between the Bonfiglioli BN and BE motor series?
A: The prefix designates the energy efficiency class. The BN series represents standard efficiency (IE1), while the BE series represents High Efficiency (IE2), consuming significantly less electrical power for the exact same mechanical output, saving substantial money over its heavy-duty operational lifetime.
Q: Can I run this 50Hz motor on a 60Hz power grid?
A: Yes. Most Bonfiglioli 50Hz motors can operate safely on a 60Hz grid. However, the synchronous speed will increase by 20% (from 1500 to 1800 RPM), and you must carefully adjust your machinery to handle this increased rotational speed and verify the pump/fan load does not exceed the motor’s horsepower limits at 60Hz.
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When designing high-efficiency conveyor setups, this robust 4-pole motor delivers the necessary input power to seamlessly drive compact units such as the VF 49 P1 100 P71 B14 B3 worm gearbox.
