| Parameter | Specification |
|---|---|
| Motor Type | External Rotor |
| Voltage Range | 230V / 415V (Single & Three Phase) |
| Frequency | 50 Hz / 60 Hz |
| Speed Range | 1400 RPM / 2800 RPM (or as required) |
| Power Rating | Up to [X] HP / kW |
| Insulation Class | Class F / H |
| Protection Class | IP44 / IP54 / IP65 |
| Mounting Options | Foot / Flange / Custom Integration |
External Rotor Motor
At VBM Enterprises, we manufacture high-quality External Rotor Motors designed for direct-drive fan applications where compact design, energy efficiency, and silent operation are critical. Built to international safety standards, our motors are CE Certified and conform to EN60335-1 specifications, ensuring performance, safety, and reliability.
Engineered for seamless integration with axial fans, centrifugal blowers, and other air-moving equipment, these motors offer a space-saving alternative without compromising on power.
Compact | Vibration-Free | Direct Drive Capability
Specifications:
The External Rotor Motor has a wound Stator and Aluminium Die Cast Rotor. The rotor moves externally around the Stator.
Key Feature
- Compact, Space-Saving Design
- Low Noise & Smooth Operation
- CE Marked & EN60335-1 Compliant
- Direct-Drive Capable — No Belt Required
- High Efficiency & Long Service Life
- Internal Thermal Protection Available
- Available in Multiple Mounting Styles & Speeds
Applications
- Axial Flow Fans
- Centrifugal Blowers
- HVAC Systems
- Refrigeration & Cooling Units
- Air Curtains & Heat Exchangers
- Electronic Equipment Cooling
- Laboratory Ventilation
- OEM Fan-Based Machinery
Why External Rotor Motors?
Compact Structure: The rotor is positioned outside the stator, making the motor shorter in length—ideal for compact equipment designs.
Better Cooling: Direct airflow over the motor improves heat dissipation.
Vibration-Free Operation: Built for quiet performance in noise-sensitive environments.
No Transmission Losses: Direct-drive operation eliminates the need for belts or pulleys, enhancing efficiency.
Customization & Engineering Support
We offer tailored solutions for:
Shaft length and diameter
Mounting and bracket types
Speed and power ratings
Connector types and wiring configurations
Model Description
External Rotor Motors (72mm)
| Model No. | A (mm) | B (mm) | V | A | W | RPM | Capacitor | Weight (Kgs) |
|---|---|---|---|---|---|---|---|---|
| MO72/2328/A1 | 20 | 60 | 230 | 0.16 | 35 | 2800 | 1 | 0.7 |
| MO72/2328/A2 | 25 | 65 | 230 | 0.20 | 45 | 2800 | 1 | 1.0 |
External Rotor Motors (92mm)
| Model No. | A (mm) | B (mm) | V | A | W | RPM | Capacitor | Weight (Kgs) |
|---|---|---|---|---|---|---|---|---|
| MO92/2314/S1 | 15 | 68 | 230 | 0.23 | 50 | 1400 | 1 | 1.2 |
| MO92/2328/S1 | 15 | 68 | 230 | 0.25 | 55 | 2800 | 1 | 1.3 |
| MO92/4428/S1 | 15 | 68 | 415 | 0.17 | 60 | 2800 | – | 1.3 |
| MO92/2314/S2 | 25 | 78 | 230 | 0.32 | 70 | 1400 | 2 | 1.8 |
| MO92/2328/S2 | 25 | 78 | 230 | 0.36 | 80 | 2800 | 2 | 1.9 |
| MO92/4428/S2 | 25 | 78 | 415 | 0.28 | 100 | 2800 | — | 1.9 |
| MO92/2314/S3 | 35 | 88 | 230 | 0.45 | 100 | 1400 | 3.15 | 2.2 |
| MO92/2328/S3 | 35 | 88 | 230 | 0.61 | 135 | 2800 | 3.15 | 2.3 |
| MO44/4428/S3 | 35 | 88 | 415 | 0.40 | 140 | 2800 | — | 2.3 |
External Rotor Motors (102mm)
| Model No. | A (mm) | B (mm) | V | A | W | RPM | Capacitor | Weight (Kgs) |
|---|---|---|---|---|---|---|---|---|
| MO102/2314/K3 | 35 | 105 | 230 | 0.72 | 160 | 1350 | 3.15 | 4.4 |
| MO102/2328/K3 | 35 | 105 | 230 | 0.77 | 170 | 2700 | 3.15 | 4.5 |
| MO102/4414/K3 | 35 | 105 | 415 | 0.48 | 170 | 1350 | — | 4.6 |
| MO102/4428/K3 | 35 | 105 | 415 | 0.51 | 180 | 2700 | — | 4.7 |
| MO102/2314/K4 | 47 | 117 | 230 | 0.95 | 210 | 1350 | 4 | 5.2 |
| MO102/2328/K4 | 47 | 117 | 230 | 1.04 | 230 | 2700 | 4 | 5.3 |
| MO102/4414/K4 | 47 | 117 | 415 | 0.62 | 220 | 1350 | — | 5.2 |
| MO102/4428/K4 | 47 | 117 | 415 | 0.71 | 250 | 2700 | — | 5.2 |
| MO102/2314/K5 | 60 | 130 | 230 | 1.13 | 250 | 1350 | 5 | 6.5 |
| MO102/2328/K5 | 60 | 130 | 230 | 1.20 | 265 | 2700 | 5 | 6.6 |
| MO102/4414/K5 | 60 | 130 | 415 | 0.74 | 260 | 1350 | — | 6.7 |
| MO102/4428/K5 | 60 | 130 | 415 | 0.78 | 275 | 2700 | — | 6.8 |
Our Manufacturing Process
Precision at Every Step — From Winding to Delivery
At VBM Enterprises, every product goes through a systematic, quality-controlled process to ensure high performance, durability, and safety. Here’s how we bring excellence to every fan and motor we build:
Step 1: Coil Winding & Motor Assembly
We begin with precision winding of coils to create efficient fan motors, followed by connecting lead wires to ensure electrical integrity.
Step 2: Motor Testing
Every motor undergoes Ohm value testing to check coil resistance, ensuring proper functionality from the start.
Step 3: Hi-POT & Impulse Testing
We perform high-potential and impulse testing to verify insulation strength between coils and motor casings, enhancing product safety and reliability.
Step 4: Motor Mounting & Impeller Balancing
Change the color to match your brand or vision, add your logo and more.
Step 5: Final Assembly & Quality Checks
Impellers are assembled to the motors, followed by pre-delivery inspections checking for vibration, wattage, and current to ensure optimal performance.
Step 6: Final Testing & Packing
A final round of Hi-POT insulation testing is conducted before products are carefully packed for delivery — guaranteeing both safety and quality in transit.
Let’s Build the Right Blower for You
At VBM Enterprises, every product goes through a systematic, quality-controlled process to ensure high performance, durability, and safety. Here’s how we bring excellence to every fan and motor we build: