CNC & Machine Tool Dedicated VFD
High-precision variable frequency drive for spindle motors, CNC lathes, milling machines, and grinding equipment
Vector Control
Low Speed Ripple
Compact Design
Why This VFD for CNC & Machine Tools?
⚙️ High-Precision Speed Control
Sensorless vector control (SVC) with ±0.2% speed accuracy. Spindle speed stays stable with zero fluctuation during cutting.
💪 High Torque at Low Speed
Delivers 150% rated torque at 0.5Hz — enables heavy cutting at low spindle speeds without tool breakage.
📐 Ultra-Compact Design
H2/S2 series with minimal footprint — easily integrated into machine tool control cabinets where space is limited.
⚡ Rapid Acceleration/Deceleration
Minimum 0.1s acceleration time — meets high-speed tool change requirements for CNC machining centers.
Recommended Models
Select the right VFD based on your spindle motor power and input power availability:
| Model | Power | Input | Output | Best For |
|---|---|---|---|---|
| VFD300 H2 0.75-4T1 | 0.75kW | 1PH 220V | 1PH 0-220V | Small spindle motors, engraving machines |
| VFD300 H2 1.5-4T1 | 1.5kW | 1PH 220V | 1PH 0-220V | CNC lathe spindle, small milling |
| VFD300 S2 2.2-4T1 | 2.2kW | 1PH→3PH 220V | 3PH 0-220V | Standard CNC spindle, grinding machines |
| VFD300 S2 3.7-4T1 | 3.7kW | 1PH→3PH 220V | 3PH 0-220V | Larger CNC spindle, milling machines |
| VFD300 N/T 5.5G-4T1 | 5.5kW | 3PH 380V | 3PH 0-380V | Heavy-duty machine tool, boring machines |
| VFD300 N/T 7.5G-4T1 | 7.5kW | 3PH 380V | 3PH 0-380V | Large CNC gantry, planer machines |
Key Features
SVC Vector Control
Sensorless vector control for high-precision speed and torque regulation — ideal for spindle applications.
High-Frequency Operation
Supports up to 400Hz output frequency — compatible with high-speed spindle motors (up to 24,000 RPM).
Multi-Speed Programming
16 programmable speed steps — adapt to different machining processes without external PLC.
Quick Deceleration
Rapid deceleration with braking unit — meets emergency stop requirements for safety-critical operations.
RS485 Communication
MODBUS RTU via RS485 — seamlessly integrates with CNC control systems for centralized monitoring.
Compact Housing
Compact form factor designed for machine tool control cabinet installation — saves valuable panel space.
Low Noise Operation
High-frequency PWM carrier reduces motor noise — creates a quieter workshop environment.
Application Scenarios
CNC Lathe Spindle Drive
Precise spindle speed control for turning operations with constant surface speed.
CNC Milling / Machining Center
Quick tool changes and variable speed for multi-axis milling operations.
Grinding & Engraving
High-frequency output for high-speed grinding spindles and precision engraving.
Woodworking Spindle
Smooth speed control for CNC routers and woodworking machining centers.
Selection Tips
- Check spindle motor rated speed and max speed — ensure the VFD output frequency covers the full range.
- Single-phase machine tools → Choose H2/S2 series (1PH 220V input).
- Three-phase machine tools → Choose N/T series (3PH 380V input).
- High-speed spindles (>6,000 RPM) → Confirm VFD maximum output frequency matches your motor.
- Braking resistor recommended — enables fast spindle stop for safety and cycle time optimization.
Frequently Asked Questions
What is the difference between CNC-dedicated VFD and general-purpose VFD?
CNC-dedicated VFDs offer higher speed precision (±0.2%), faster acceleration/deceleration, high-frequency output support (up to 400Hz), and better compatibility with CNC control systems via RS485/MODBUS communication.
Which VFD series should I choose for my CNC machine?
For single-phase 220V power supply, choose H2 series (≤1.5kW) or S2 series (2.2-3.7kW). For three-phase 380V power supply, choose N/T series (5.5kW and above). Match the VFD power rating to your spindle motor rating.
Can this VFD control a 24,000 RPM high-speed spindle?
Yes. The VFD300 series supports up to 400Hz output frequency. A 4-pole motor at 400Hz runs at approximately 24,000 RPM. Confirm your motor’s rated frequency and pole count to verify compatibility.
Do I need a braking resistor?
Highly recommended for CNC applications. A braking resistor enables rapid spindle deceleration and emergency stops, reducing cycle time and improving safety. It dissipates regenerative energy during deceleration.
How do I integrate the VFD with my CNC controller?
Use the RS485 communication port with MODBUS RTU protocol. Most CNC controllers (Mach3, LinuxCNC, Fanuc, Siemens) support MODBUS communication for speed commands, status monitoring, and fault diagnosis.
Need Help Selecting the Right VFD for Your CNC Machine?
Our engineers can help you match the perfect VFD to your spindle motor specs. Get a quote with technical support within 24 hours.