Product Analysis: Bonfiglioli BN 90S 4 AC Motor
The Bonfiglioli BN 90S 4 230/400-50 IP55 is a high-quality three-phase asynchronous AC motor. As part of the BN series, it is the standard choice for industrial drives, offering a rugged design and reliable performance. This 4-pole motor is engineered for a nominal power of 1.1kW (1.5 HP) and is designed to operate seamlessly with Bonfiglioli gearboxes or as a standalone drive unit.
Performance and Electrical Specifications
This motor is wound for 230/400V at a frequency of 50Hz, providing a nominal speed of approximately 1410-1430 RPM. The IP55 protection rating ensures that the motor is protected against dust ingress and low-pressure water jets, making it suitable for standard and harsh industrial environments. The 90S frame size is constructed from die-cast aluminum, offering an excellent power-to-weight ratio and high thermal conductivity.
Key Technical Characteristics
- Part Number: BN 90S 4 230/400-50 IP55.
- Frame Size: 90S.
- Poles: 4 (approx. 1400 RPM).
- Rated Power: 1.1 kW.
- Voltage: 230V Delta / 400V Star.
- Frequency: 50 Hz.
- Protection: IP55 (Dust/Water resistant).
- Insulation Class: F (155°C).
Construction and Durability
Bonfiglioli BN motors are built with precision-balanced rotors to minimize noise and vibration, extending the life of both the motor and the coupled equipment. The Class F insulation allows for a temperature rise that handles industrial overloads safely. The terminal box is designed for easy access and wiring, while the cooling fan provides optimal airflow across the external fins to maintain stable operating temperatures during continuous S1 duty.
| Feature | Value |
| Full Load Current | approx. 2.7A at 400V |
| Efficiency | Standard Industrial Efficiency |
| Weight | approx. 12-14 kg |
Application Focus
The BN 90S 4 is the workhorse of the automation industry. It is frequently paired with W 63 or VF 49 gearboxes to drive conveyors, industrial fans, and mixers. Its robust design ensures a long service life with minimal maintenance requirements, primarily limited to periodic inspections of the cooling fan and seals.
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