--- product_id: 522521085 title: "QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F..." brand: "qnk" price: "$411.01" currency: USD in_stock: true reviews_count: 7 category: "Qnk" url: https://www.desertcart.us/products/522521085-qnk-4kw-5-5hp-ac-220v-17a-vfd-converter-single store_origin: US region: United States of America --- # 4KW (5.5HP) power output 0-2000 Hz variable frequency range Advanced multi-protection system QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... **Brand:** qnk **Price:** $411.01 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your CNC game with power, precision, and peace of mind! ## Quick Answers - **What is this?** QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... by qnk - **How much does it cost?** $411.01 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/522521085-qnk-4kw-5-5hp-ac-220v-17a-vfd-converter-single) ## 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 - • **Built to Last:** Copper coil internals and nonflammable casing deliver unmatched durability and safety. - • **Silent & Stable:** Low-noise PWM tech ensures whisper-quiet operation with minimal interference. - • **Speed on Demand:** Ultra-wide 0-2000 Hz frequency control for ultimate motor speed customization. - • **Power Meets Precision:** Robust 4KW output powers your CNC spindle with seamless efficiency. - • **Plug & Play Versatility:** Supports single to 3-phase conversion with RS485 MODBUS for smart industrial integration. ## Overview The QNK 4KW 5.5HP 220V VFD Converter transforms single-phase input into a stable 3-phase output, delivering up to 4KW power with a variable frequency range up to 2000 Hz. Engineered with advanced PWM control for low noise and electromagnetic interference, it features comprehensive safety protections and durable copper coil construction. Ideal for CNC spindles, routers, and industrial motors, it offers flexible digital and analog control options plus RS485 MODBUS communication for seamless integration in professional environments. ## Description Product description 4KW 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:4KW Input Voltage: 220V(+/-15%)/ 180V-250V Output Voltage: 0-220V Input Current: 0-17A Output Current: 0-17A Input Phase: 1 or 3 Phase Output Phase: 3 Phase Input Frequency: 50/60 Hz Output Frequency: 0-1000 Hz Package Includes 1* 4KW 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: Good instructions. Works perfectly. - I picked this up to run an Enco 3 hp vertical mill. After spending some time with the manual, I hooked it up without issue on the first try. My mills runs buttery smooth without hesitation. I like the ability to vary the speed with the turn of a dial. I remote mounted the VFD on the front of the mill for easy access. The included cable was just long enough to reach from the back of the mill to the face plate I made for the front by the master switch. I would and did buy again. Picked a 25 amp unit up for my 3 phase table saw I just drug home from an auction. Review: Works great - Using this on a 3hp 3phase motor on an old lagun mill. Has been working great so far. Easy to do variable speed with. Probably one solution for those folks who have variable speed pulleys which don’t work correctly anymore. ## Features - 【4KW (5.5HP) Variable Frequency Drive】Input: 1-phase/3-phase 220 VAC (+/- 15%), 0- 17 A, and 50/60 Hz. Output: 3-phase 220 VAC, 0-17A, 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 | B0BS3JPGJY | | Antenna Location | Home | | Battery Capacity | 17 Amp Hours | | Best Sellers Rank | #278,969 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #284 in Motor Speed Controllers | | Brand | QNK | | Color | Black | | Customer Reviews | 4.2 out of 5 stars 18 Reviews | | Display Type | Digital | | Electrical Output Waveform | Pure Sine Wave | | Frequency | 60 Hz | | Input Voltage | 220 Volts | | Manufacturer | QNK | | Mfr Part Number | QNK | | Model Name | 4KW 5.5HP 220V AC 17A VFD Converter | | Model Number | 4KW220V | | Output Power | 4 Kilowatts | | Output Voltage | 220 Volts | | Peak Output Power Watts | 4000 | | Power Source | 220v | | Recommended Uses For Product | Home | | Standby Power Shutoff | 90 | | UPC | 729162004748 | | Wattage | 4 KW | ## Product Details - **Battery Capacity:** 17 Amp Hours - **Brand:** QNK - **Power Source:** 220v - **Recommended Uses For Product:** Home - **Wattage:** 4 KW ## Images ![QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... - Image 1](https://m.media-amazon.com/images/I/61zpQwas2WL.jpg) ![QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... - Image 2](https://m.media-amazon.com/images/I/61PNuiaLgqL.jpg) ![QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... - Image 3](https://m.media-amazon.com/images/I/61mCiXo8-tL.jpg) ![QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... - Image 4](https://m.media-amazon.com/images/I/61SKwlEFlXL.jpg) ![QNK 4KW 5.5HP AC 220V 17A VFD Converter Single to 3 Phase Inverter Variable F... - Image 5](https://m.media-amazon.com/images/I/71dVr4o7JZL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Can the vfd be used to drive a single phase induction motor for a fan?d** A: Thank you for getting in touch. Using a VFD for a single-phase fan motor isn't usually a good idea due to the motor's high starting current, which can stress both the motor and the VFD. If you still want to use a VFD, you must carefully choose one with a much higher power rating than the motor. For instance, if the motor is 1.5KW, go for a VFD between 3KW and 5.5KW. **Q: Will this work on a wood turning lathe to make variable speed** A: Thank you for your message. Our variable frequency drives work well with wood turning lathes that have spindle motors. If your lathe has a different motor or is a planer, compatibility depends on the motor's power. Please check your lathe's motor specifications or consult your lathe manufacturer or an electrician for guidance. If you have more details about your lathe, feel free to share them for further assistance. We're here to help with any questions you have. **Q: Where can I download a manual for this?** A: Hi, Eli G. Thank you for bringing this to my attention. Here's the link to the user manual for this inverter. https://m.media-amazon.com/images/I/A1Qyd6MaAbL.pdf Hope this helps. Best regards, Helen | Customer Service | QNK Support Team **Q: Hola, queria preguntar, el voltaje de entrada puede ser 220v entre fase y fase o tiene que ser 220v entre fase y neutro?** A: hola, el voltaje de entrada ser 220v entre fase y fase. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good instructions. Works perfectly. *by J***G on June 2, 2025* I picked this up to run an Enco 3 hp vertical mill. After spending some time with the manual, I hooked it up without issue on the first try. My mills runs buttery smooth without hesitation. I like the ability to vary the speed with the turn of a dial. I remote mounted the VFD on the front of the mill for easy access. The included cable was just long enough to reach from the back of the mill to the face plate I made for the front by the master switch. I would and did buy again. Picked a 25 amp unit up for my 3 phase table saw I just drug home from an auction. ### ⭐⭐⭐⭐⭐ Works great *by N***E on April 11, 2025* Using this on a 3hp 3phase motor on an old lagun mill. Has been working great so far. Easy to do variable speed with. Probably one solution for those folks who have variable speed pulleys which don’t work correctly anymore. ### ⭐⭐⭐⭐⭐ Phase converter *by S***N on April 6, 2026* Exactly what I needed ## Frequently Bought Together - QNK 4KW 5.5HP 220V AC 17A VFD Converter Single to 3 Phase Inverter Variable Frequency Drive for CNC Spindle Motor Speed Controller - Mitutoyo 050101, Edge Finder, 3/8" Dia. Shank, .200" Dia. Tip - AUTOTOOLHOME 1/8" 3/16" 1/4" 5/16" 3/8" 1/2" high Speed Steel HSS 4 Flute Straight End Mill Cutter 5/32" 1/16" Set of 8 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/522521085-qnk-4kw-5-5hp-ac-220v-17a-vfd-converter-single](https://www.desertcart.us/products/522521085-qnk-4kw-5-5hp-ac-220v-17a-vfd-converter-single) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-11*