VFD for CNC Spindle Motors and Routers
A VFD for CNC spindle motors converts mains power into variable-frequency three-phase power, which sets the spindle's speed: a two-pole spindle rated 24,000 RPM runs at 400 Hz, and an 18,000 RPM spindle at 300 Hz. Choose a spindle VFD rated at or above the spindle's power and current that can output its rated frequency.
Featured VFD Inverters & Compatible Systems
DELTA VFD MS300 3-Phase 5.5kW / 7.5HP AC Drive
Compact vector control micro drive designed for high-frequency CNC spindle motor speed control up to 1500Hz.
View Delta VFD Specifications →Air-Cooled CNC Spindle Motors
High-speed 18,000 to 24,000 RPM electrospindles perfectly matched with our high-frequency VFD drives.
Explore Air-Cooled Spindles →Industrial Laser & Spindle Chillers
Active closed-loop cooling units to stabilize temperatures when running high-frequency spindles on VFDs.
Explore Industrial Chillers →Why Choose TriQuench VFDs?
Vector Control
Advanced vector control algorithms ensure high torque even at low operating speeds.
Overload Protection
Built-in thermal and electrical safeguards protect your expensive spindle motors from damage.
Easy Integration
Standardized Modbus communication and easy-to-use keypads for rapid commissioning.
Choosing a spindle VFD
TriQuench India supplies VFDs for CNC spindles from 0.4 kW to 15 kW, including Delta MS300 drives (single-phase 230V input to three-phase output, and three-phase 415V input) and TQMES, TDL200 and TSW200 drives. For a VFD for CNC router spindles, match three numbers on the spindle nameplate: power, current and rated frequency. A 300 Hz VFD setting suits most 18,000 RPM air cooled spindles; 400 Hz suits 24,000 RPM spindles. For a 3.5 kW spindle, the VFD 3.5 kW class choice is a 3.7 kW (5 HP) drive.
VFD price in India
VFD price in India depends on power rating, input phase (1-phase or 3-phase), brand, control mode and accessories such as a braking resistor or remote keypad. The price table on this page shows indicative ranges; ask for a quote with your spindle's nameplate for an exact price.
VFD for CNC Spindle: frequently asked questions
Which VFD should I use for a CNC spindle?
Use a VFD rated at or above the spindle's power and full-load current, with an output frequency at least equal to the spindle's rated frequency, typically 300 or 400 Hz. Match the input to your supply: single-phase 230V input drives for 220V spindles, three-phase 415V drives for 380V spindles. Sensorless vector control helps torque at low speed.
Example: a 2.2 kW 220V spindle pairs with a 2.2 kW single-phase-input Delta MS300; a 7.5 kW 380V spindle pairs with a 7.5 kW three-phase MS300 or TDL200.
How do I set VFD parameters for a spindle motor?
Enter the spindle nameplate values: rated voltage, rated current, rated frequency (for example 400 Hz), base frequency equal to rated frequency, maximum frequency, and motor poles (usually 2). Set acceleration and deceleration to several seconds, a minimum frequency so the spindle never runs too slow to cool, and the overload limit to the rated current.
Then set the frequency source to the CNC's analogue or communication signal and the run command to the controller's outputs. Parameter numbers differ by brand; we can share the settings for the drive we supply with your spindle.
Related products, guides and services
Get a quote for VFD for CNC Spindle
Tell us the model, size or the machine it is for. Our Ahmedabad team replies with specifications, availability and price.
Pan-India 24–48h express dispatch • P4 ceramic bearings • ISO 1940 Grade G0.4 dynamic balancing
VFD Drive Inverters Technical Specification & Price Comparison Matrix
Comprehensive technical parameters, spindle speeds, tool-holding tapers, and approximate price ranges in India across genuine TriQuench models.
| Model / Configuration | Power (kW / HP) | Rated Speed (RPM) | Cooling Method | Collet / Taper | Voltage Rating | Price Range (India) |
|---|---|---|---|---|---|---|
| DELTA VFD-MS300 (1.5 kW) | 1.5 kW (2.0 HP) | Up to 599 Hz (36,000 RPM) | Heatsink + Forced Air Fan | Modbus RS-485 / Analog / Pulse | 220V 1-Phase / 3-Phase | ₹12,500 – ₹15,500 |
| DELTA VFD-MS300 (2.2 kW) | 2.2 kW (3.0 HP) | Up to 599 Hz (36,000 RPM) | Integral Cooling Fan | Modbus RS-485 / 0-10V / Multi-speed | 220V / 380V 3-Phase | ₹15,000 – ₹19,000 |
| DELTA VFD-MS300 (3.7 kW) | 3.7 kW (5.0 HP) | Up to 599 Hz (36,000 RPM) | Forced Air Cooling Fan | Vector Control (SVC) / Modbus | 380V 3-Phase | ₹22,000 – ₹27,500 |
| DELTA VFD-MS300 (5.5 kW) | 5.5 kW (7.5 HP) | Up to 599 Hz (36,000 RPM) | Heavy Industrial Fan | High-Speed Vector / Safe Torque Off | 380V 3-Phase | ₹28,500 – ₹36,000 |
| DELTA VFD-MS300 (7.5 kW) | 7.5 kW (10.0 HP) | Up to 599 Hz (36,000 RPM) | High CFM Blower | Modbus / CANopen / Pulse Train | 380V 3-Phase | ₹38,000 – ₹47,000 |
| TriQuench HF Inverter (11 kW) | 11.0 kW (15.0 HP) | Up to 1,000 Hz (60,000 RPM) | Dual Forced Air Fans | Closed-Loop Vector / Modbus | 380V 3-Phase | ₹55,000 – ₹72,000 |
How to Choose the Right VFD Drive Inverters: 5-Step Engineering Guide
Step-by-step sizing and technical selection criteria recommended by machine design engineers for optimal cutting speed, rigidity, and lifespan.
Match Motor Rated Power & Sizing Headroom
Always select a VFD rated equal to or one frame size higher than your spindle motor (e.g., pair a 2.2kW spindle with a 2.2kW or 3.7kW VFD) to handle inrush current without tripping.
Verify Output Maximum Frequency Capacity
Standard industrial VFDs max out at 50Hz–60Hz. CNC spindles require high-frequency inverters capable of minimum 400Hz (for 24,000 RPM) up to 1,000Hz (for 60,000 RPM).
Select Control Algorithm (V/F vs Sensorless Vector)
V/F mode is sufficient for high-speed routing, while Sensorless Vector Control (SVC) monitors rotor slip to maintain full torque at low RPMs for drilling and hard alloy milling.
Confirm Utility Input Voltage & Phase
Choose 220V single-phase input VFDs for small workshops running on domestic power, or 380V/415V three-phase input VFDs for heavy industrial facilities.
Check Communication & Braking Resistor Support
Ensure the drive includes Modbus RS-485 for digital speed control from Mach3, LinuxCNC, or DSP controllers, plus a built-in braking chopper for fast spindle stops.
Air Cooled vs. Water Cooled VFD Drive Inverters: Technical & Operational Comparison
Evaluate heat rejection methods, acoustic limits, maintenance burdens, and workshop duty cycles before finalizing machine installation.
| Technical Comparison Factor | Air Cooled Configuration | Water / Liquid Cooled Configuration |
|---|---|---|
| Cooling Medium | Integrated fan or independent electric fan blowing across cooling fins | Closed-loop liquid circulation powered by submersible pump or active chiller |
| Ambient Temperature Handling | Directly affected by workshop temperature; best below 38°C | Maintains fixed 20°C–25°C coolant temperature regardless of ambient heat |
| Operating Noise Level | 72 dB – 82 dB (fan turbulence noticeable at 24,000 RPM) | Whisper quiet (< 62 dB); ideal for noise-sensitive production floors |
| Duty Cycle Capability | Intermittent to moderate continuous duty (8–12 hours) | Continuous 24/7 industrial duty cycle with zero thermal throttling |
| Maintenance & Plumbing | Zero plumbing; periodic compressed air cleaning of cooling fins | Requires coolant hoses, water reservoir, anti-algae treatment, and chiller monitoring |
| Best Machining Applications | Woodworking, nested MDF furniture, plastics, acrylic, and sign routing | Aluminum extrusions, stone carving, mold cavity milling, and non-ferrous alloys |
Frequently Asked Questions — VFD Drive Inverters
Answers to real user queries on prices in India, field diagnostics, repair procedures, VFD compatibility, and bearing maintenance.
What is the price of a VFD drive inverter in India?
In India, high-frequency VFD prices range from ₹12,500 to ₹15,500 for 1.5 kW drives; ₹15,000 to ₹19,000 for 2.2 kW drives; ₹22,000 to ₹27,500 for 3.7 kW models; and ₹28,500 to ₹47,000 for 5.5 kW to 7.5 kW vector drives like the Delta MS300.
Can I run a 3-phase 220V spindle on single-phase 220V input?
Yes. Many Delta MS300 and TriQuench VFD models accept 220V single-phase input from standard wall sockets and synthesize balanced 220V three-phase power for high-speed spindle motors.
Why does my VFD trip with an OC (Overcurrent) fault on startup?
Overcurrent faults during startup are usually caused by setting the acceleration ramp time too fast (< 5 seconds), incorrect motor pole settings, improper base frequency parameters, or shorted motor windings.
What is the difference between V/F control and Sensorless Vector Control (SVC)?
V/F (Volts-per-Hertz) delivers fixed voltage proportional to speed and is suitable for simple routing. SVC measures motor feedback and dynamically boosts voltage to deliver up to 150% torque even at low RPMs (under 6,000 RPM).
How do I wire a CNC controller to control VFD spindle speed?
Connect the controller 0-10V analog output to the VFD AVI/GND terminals for RPM control, and connect a relay output to the VFD FWD/DCM terminals for spindle Start/Stop commands.
Why is a braking resistor recommended for CNC spindle VFDs?
When a spindle decelerates from 24,000 RPM, it acts as a generator feeding electrical energy back into the VFD. A braking resistor safely dissipates this energy, preventing Overvoltage (OV) faults and enabling 2-second emergency stops.
How do I configure base and maximum frequency parameters?
For a 24,000 RPM spindle rated at 400Hz, you must set maximum output frequency, base frequency, and upper limit frequency to 400.00 Hz before connecting the motor to prevent catastrophic low-frequency overcurrent burnouts.
How to repair a faulty VFD drive that shows error codes or won't turn on?
VFD repair requires discharging DC bus capacitors, testing IGBT bridge rectifiers, testing gate driver optocouplers, replacing dried electrolytic capacitors, and running load bench tests with a dynamometer.
Related Machinery, Technical Guides & Overhaul Services
Explore interconnected motion control pillars, high-speed product variants, diagnostic white papers, and precision repair services across India.
Pillar Category Hubs
Featured Products
Engineering Guides
Why Indian CNC Manufacturers Choose TriQuench
Direct OEM precision engineering, verified ISO 1940 balancing certifications, and pan-India express dispatch.
1,200+ CNC Customers
Trusted by machine builders, furniture plants, and die-makers across India. Fully compatible with standard Biesse, Homag, SCM, Apex Precision, and Jyoti CNC platforms.
ISO & CE Certified
Every spindle is balanced to ISO 1940 Grade G0.4 with sub-3 micron runout accuracy. Manufactured under ISO 9001:2015 certified quality management systems.
24–48h Fast Shipping
Express dispatch from our central facility in Ahmedabad. Shipped in reinforced heavy-duty wooden crates with vacuum barrier packaging for safe transit.