VFD / Inverter Selection Guide (0.4 kW – 500 kW)
Quickly select the right VFD for your motor with SoftStarterPro. Our interactive guide helps you determine the correct motor voltage, load type, and kW/HP rating, providing recommended VFDs (including A400 Series), OEM/ODM options, and fast pre-sales and after-sales support for industrial power control applications.
Note: For custom voltage or loads beyond 0.4 – 500 kW, contact our technical team for OEM/ODM solutions.
🔹 Quick VFD Selection Calculator
Enter your motor power and select the load type — the recommended VFD rating will appear automatically.
VFD Power Calculator
Step 1: Select the Working Voltage
Identify your motor’s operating voltage and match it to the correct VFD type:
- Single-phase 220V → Three-phase 220V — For small motors such as pumps, fans, and conveyors.
- Three-phase 220V — For medium power motors and standard industrial equipment.
- Three-phase 380V — For medium to large motors, crushers, mixers, and extruders.
💡 Tip: Always confirm your motor voltage to ensure compatibility and performance.
Step 2: Determine Load Type & Selection Principle
- Light-load: Pumps, fans, conveyors → choose a VFD equal to or +1 rating higher.
- Heavy-load: Crushers, extruders, mixers → choose a VFD +2 ratings higher.
Example:
Light-load pump (15 kW motor) → 15 kW or 18.5 kW VFD
Heavy-load extruder (45 kW motor) → 55 kW VFD
Step 3: Recommended VFD Series by Voltage & Load
| Voltage Type | Power Range (kW) | Notes |
|---|---|---|
| Single-phase 220 V → Three-phase 220 V | 0.4 – 22 kW | For small motors such as pumps, fans, and conveyors. Custom 380V output available. |
| Three-phase 380 V | 0.4 – 500 kW | Standard industrial voltage, suitable for most medium to heavy-duty loads. |
| Three-phase 220 V (Custom) | 0.4 – 200 kW | Custom models available upon request. Please contact our technical team. |
Step 4: Power Factor (Selection Coefficient)
| Load Type | Selection Coefficient (Power Factor) |
|---|---|
| Pumps / Fans / Conveyors | 1.2 – 1.3 |
| Crushers / Mixers / Compressors / Hoists | 1.5 – 1.7 |
| Unknown or High Inertia Load | 1.5 – 1.7 (recommended) |
Step 5: Common Troubleshooting
- VFD does not start → Check input voltage and motor connections.
- Overheating → Ensure VFD rated power ≥ motor power × selection factor; verify cooling.
- Vibration / Noise → Check alignment and avoid overload.
- Fault codes → Refer to user manual or contact support.
Step 6: Need Help Choosing Your VFD?
Aigoodele Power Control offers:
- ✅ Free VFD selection advice & quick quotes
- ✅ OEM / ODM custom solutions
- ✅ Technical support for installation & operation
📞 WhatsApp: +86 18006697926
✉ Email: ann@softstarterpro.com
🌐 Visit Product Page: VFD Series
