---
product_id: 522521086
title: "7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller"
brand: "qnk"
price: "$546.24"
currency: USD
in_stock: true
reviews_count: 8
category: "Qnk"
url: https://www.desertcart.us/products/522521086-7-5kw-10hp-220v-ac-33a-vfd-converter-single-to
store_origin: US
region: United States of America
---

# 7.5KW / 10HP power output 0-2000Hz variable frequency range Advanced multi-protection safety system 7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller

**Brand:** qnk
**Price:** $546.24
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your precision with silent strength — the VFD that means business.

## Quick Answers

- **What is this?** 7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller by qnk
- **How much does it cost?** $546.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/522521086-7-5kw-10hp-220v-ac-33a-vfd-converter-single-to)

## Best For

- qnk enthusiasts

## Why This Product

- Trusted qnk brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerhouse Performance:** Delivers a robust 7.5KW (10HP) output to effortlessly drive your CNC spindle or industrial motor with precision and reliability.
- • **Built to Last & Protect:** Copper coil internals, nonflammable casing, and comprehensive overload, overheat, and short circuit protections guarantee durability and peace of mind.
- • **Whisper-Quiet Operation:** Innovative PWM technology ensures low noise and minimal electromagnetic interference, keeping your workspace calm and professional.
- • **Smart Connectivity & Control:** Equipped with RS485 MODBUS communication and multiple frequency setting modes, it integrates smoothly into your smart factory or workshop setup.
- • **Ultra-Flexible Frequency Control:** Seamlessly adjust motor speeds from 0 to 2000Hz, empowering you with ultimate control for diverse machining and automation tasks.

## Overview

The QNK 7.5KW 10HP 220V VFD Converter transforms single-phase input into a stable 3-phase output with up to 33A current and a frequency range of 0-2000Hz. Designed for CNC spindle motors and industrial equipment, it features advanced PWM control for low noise and EMI, robust safety protections, and versatile control options including digital, analog, and RS485 MODBUS communication. Its durable build and efficient cooling make it ideal for professional workshops seeking reliable, high-performance motor speed control.

## Description

Product description 7.5KW 220V Variable Frequency Drive This VFD converter can be used for constant-torque loads ( air compressors, HVAC units, and other hard-start kits.) and variable-torque loads (pumps, fans, etc.). It can also be used as a motor speed controller and phase converter. This VFD features 1- or 3-phase input and 3-phase output, and you can adjust the speed as needed. Adopting sine wave PWN, this inverter’s control system features high torque drive, high-accuracy wide-range speed regulation that has 8-stage / 16-stage speed control, program operation, four settings of acceleration/deceleration time, and more. NOTE 1. The VFD can’t be used as a power source for other equipment, or to drive a motor with a supply voltage lower than 90V. 2. Do not connect the VFD’s output terminals with capacitive loads. 3. Choose a VFD with a larger power output when operating heavy equipment like the crane and compressor, e.g.,a 5.5 Kw motor should be connected to a 7.5 Kw VFD. 4. If a generator is used to power the VFD, ensure that the generator's output voltage level is within +/-15%. Specifications Power: 7.5KW Input Voltage: 220V(+/-15%)/ 180V-250V Output Voltage: 0-220V Input Current: 0-33A Output Current: 0-33A Input Phase: 1 or 3 Phase Output Phase: 3 Phase Input Frequency: 50/60 Hz Output Frequency: 0-1000 Hz Please note: Do not connect to generators that is over 250V. Package Includes 1* 7.5KW VFD 1* Operation Manual 1* Extension Wire Powerful Cooling Fan The fan adopts an independent air duct design for efficient heat dissipation, ensuring that the internal temperature of the inverter is suitable for long-term stable operation. Braking Resistance The VFD can be connected with an external braking resistor (not included), which can consume the energy generated by the motor with an energy feedback device, such as the motor of lifting equipment or centrifugal equipment, and allows for fast braking of the motor, e.g., enabling the spindle of an engraving machine with a peed of 24,000 rpm/min stop within 0.5s-2s.) High-Quality Material The ABS VFD chassis is flame retardant, anti-impact, and corrosion-free. It performs well in protecting the breaker from tripping and has good anti-jamming performance of temperature, humidity, and dust. RS-485 Communication Function With RS-485, a single controller, e.g. a PLC or DCS, can control multiple inverters. Also, this VFD's start, stop, frequency setting, status monitoring and feedback, etc., are all controllable through RS-485. Dual-Chip Design The motor program of the VFD frequency converter is independent from the control program, which features redundant computation, strong anti-interference ability, high-speed running, and stable operation. Multiple Protection Overload protection Overheat protection Over-voltage protection Low-voltage protection Fuse protection Stall protection Short circuit protection Restart protection

Review: Instructions a little difficult to read, but once it’s figured out product works very well. - Works well for my air compressor. Instructions are a little difficult to read, but once you figure it out, it’s pretty smooth sailing from there. The only trouble I had was with the control circuit, which is literally just a loop. I thought I had to hook up an external power source for the control circuits, but it’s literally just a loop with a switch in it, which in this case was the compressor pressure switch. Only power supply I had to hook up was for the 220 V. The unit itself is constructed of plastic, but it does not feel very cheap, it is actually quite a sturdy piece of equipment. I used a 10 hp unit for my 5 hp compressor. No overheating issues, and it also includes an internal temperature reading so you can monitor while it’s running. I would definitely purchase this again.
Review: Running Lathe or Mill with one VFD - I was running VFD on 3 phase Mill for several years. Purchased newer 7.5HP Lathe and decided to go VFD on it also. Decided to remove the smaller VFD from Mill to use on other projects so I add a Drum switch ON/Off/ON to new VFD and operate the Lathe or Mill being side by side from single VFD. Mounted on swing post so VFD is accessible to either machine. Can only run one machine at time but for small one man shop works great.

## Features

- 【7.5KW (10HP) Variable Frequency Drive】Input: 1-phase/3-phase 220 VAC (+/- 15%), 0- 33 A, and 50/60 Hz. Output: 3-phase 220 VAC, 0-33A, and 0-2,000 Hz.
- 【Low-Noise Operation & Low Electromagnetic Interference】 The PMW control technology and a component compatibility design allow this VFD for low-noise operation and low electromagnetic interference.
- 【V/F Control & Vector Control】 The VFD frequency setting mode includes digital setting, analog setting, serial communication setting (RS485 communication port, adopting standard international MODBUS main circuit control), PID setting (advanced calculus PID closed-loop arithmetic, quick responding speed, and high suitability), etc.
- 【Improved Safety & Durability】QNK VFD features protective functions for overload, fuse, over voltage (DC voltage>400V) or under voltage (DC voltage<200V), restart, stall, short circuit, and overheat. Moreover, it comes with copper coil internals and a nonflammable exterior for durability and a multi-grid design with enough cooling space between the electronic components and the case for fast heat dissipation.It also can prevent dust, water mist entering the circuit board section effectively.
- 【Wide Application】The VFD can be used in various types of equipment such as Spindle Motors, CNC Routers, Milling Machines, Pumps, Compressors, Grinders, among others.
- 【Attention】Please Note:1.This VFD surpport external resistor!!! If your motor is heavy load, pls choose a higher power level VFD or contact sales for model selection suggestion. 2.The VFD can’t be used as a power source for other equipment, or to drive a motor with a supply voltage lower than 90V. 3.Do not connect the VFD’s output terminals with capacitive loads.4.Choose a VFD with a larger power output when operating heavy equipment like the crane and compressor, e.g.,a 5.5 Kw motor should be connected to a 7.5 Kw VFD. 4.If a generator is used to power the VFD, ensure that the generator's output voltage level is within +/-15%.
- 【Customer Service】If there is an error code in the product and you do not know how to operate,or other questions of this product,pls feel free to contact us. Customer Support Team will help you as soon as we can within 24h.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BS314XSJ |
| Antenna Location | Home |
| Battery Capacity | 33 Amp Hours |
| Best Sellers Rank | #120,095 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #54 in Electrical Motor Controls |
| Brand | QNK |
| Built-In Media | VFD |
| Color | Black |
| Customer Reviews | 3.8 out of 5 stars 16 Reviews |
| Display Type | LCD or LED |
| Electrical Output Waveform | Modified Sine Wave |
| Frequency | 60 Hz |
| Input Voltage | 220 Volts |
| Manufacturer | QNK |
| Mfr Part Number | QNK |
| Model Name | QNK 7.5KW 10HP 220V AC 33A VFD Converter |
| Model Number | 7.5KW220V |
| Output Power | 7500 Watts |
| Output Voltage | 220 Volts |
| Peak Output Power Watts | 7500 |
| Power Source | AC (220 VAC) |
| Recommended Uses For Product | Home |
| Standby Power Shutoff | 90 |
| UPC | 729162004724 |
| Voltage | 220 Volts |
| Wattage | 7.5 KW |

## Product Details

- **Battery Capacity:** 33 Amp Hours
- **Brand:** QNK
- **Power Source:** AC (220 VAC)
- **Recommended Uses For Product:** Home
- **Wattage:** 7.5 KW

## Images

![7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Image 1](https://m.media-amazon.com/images/I/61ysS0Q83HL.jpg)
![7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Image 2](https://m.media-amazon.com/images/I/61N6HvleqeL.jpg)
![7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Image 3](https://m.media-amazon.com/images/I/61mCiXo8-tL.jpg)
![7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Image 4](https://m.media-amazon.com/images/I/61SKwlEFlXL.jpg)
![7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Image 5](https://m.media-amazon.com/images/I/71dVr4o7JZL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Instructions a little difficult to read, but once it’s figured out product works very well.
*by D***D on August 20, 2025*

Works well for my air compressor. Instructions are a little difficult to read, but once you figure it out, it’s pretty smooth sailing from there. The only trouble I had was with the control circuit, which is literally just a loop. I thought I had to hook up an external power source for the control circuits, but it’s literally just a loop with a switch in it, which in this case was the compressor pressure switch. Only power supply I had to hook up was for the 220 V. The unit itself is constructed of plastic, but it does not feel very cheap, it is actually quite a sturdy piece of equipment. I used a 10 hp unit for my 5 hp compressor. No overheating issues, and it also includes an internal temperature reading so you can monitor while it’s running. I would definitely purchase this again.

### ⭐⭐⭐⭐⭐ Running Lathe or Mill with one VFD
*by C***K on September 26, 2023*

I was running VFD on 3 phase Mill for several years. Purchased newer 7.5HP Lathe and decided to go VFD on it also. Decided to remove the smaller VFD from Mill to use on other projects so I add a Drum switch ON/Off/ON to new VFD and operate the Lathe or Mill being side by side from single VFD. Mounted on swing post so VFD is accessible to either machine. Can only run one machine at time but for small one man shop works great.

### ⭐⭐⭐⭐ Necesito ayuda para arrancar con señal 24 volts
*by J***S on February 22, 2026*

Tienen el manual en español, no soy experto y el ingles me complica la configuración, pero si logre arrancar un aire acondicionado, lo unico que me falta es arrancar el vfd con señal de 24 volts del termostato del aire acondicionado, o podrian explicarme como usar esa señal para que arranque y pare con el termostato, gracias

## Frequently Bought Together

- QNK 7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller
- Electromagnetic Power Relay, 8-Pin 10 AMP 12V DC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY2NJ 2PCS [Applicable for DIN Rail System]
- APIELE (Pack of 2) 22mm 2 Position Selector Switch Maintained 1NO XB2-10X/21 (2 Position Maintained)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-13*