0.75 kW Mini VFD, Single to 3 Phase, Non-Enclosure

$142.46

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For single-phase sites that need to run a 1 hp three-phase motor, this 0.75 kW mini VFD delivers 4.7 A of rated output current from a 220–240V supply, with output up to 1000 Hz and 150% overload for 1 minute. The open-frame board measures (150 × 98 × 114)mm and weighs 887g, and it is designed to be mounted inside your own cabinet. V/F and sensorless vector control, a built-in PID controller, and RS-485 communication are included.

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Delivery date: 6-12 days

SKU: GK3300-2S0007

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Overview
Details
FAQ
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Overview

The model is the 0.75 kW (1 hp) rating of our non-enclosure mini VFD range. It has no outer shell, so the host cabinet provides the protection, and the drive adds only a compact board to the panel.

Running a three-phase motor from a single-phase supply puts extra stress on a drive, because input current and DC bus ripple are higher than on a three-phase supply. For that reason, match the motor's rated current to the drive's 4.7 A rating, not just its horsepower. Install the board in a closed cabinet, keep ambient temperature between –10℃ and +40℃, and derate output by 5% for each 1℃ above 40℃. If you need a finished housing for standalone mounting, see our enclosed single- to three-phase frequency inverters.

Specifications

Basics	Model	GK3300-2S0007
	Capacity	0.75 kW (1 hp)
	Shipping Weight	887 g
	Dimension	(15098114) mm
I/O Feature	Rated Current	4.7 A
	Input Voltage	1-phase 220~240V AC
	Input Frequency	50Hz/ 60Hz
	Output Voltage	3-phase AC 0~input voltage
	Output Frequency	0Hz~1000Hz
	Overload Capacity	150% of rated current for 1 minute, 180% of rated current for 3 seconds
Control Feature	Control Mode	V/F control
	Control Mode	Sensorless vector control
	Communication	RS485
	Speed Regulation	1:100
	Start Torque	150% of rated torque at 1 Hz
	Speed Control Accuracy	≤±0.5% of rated synchronous speed
	Frequency Precision	Digital setting: max frequency x ±0.01%
	Frequency Precision	Analog setting: max frequency x ±0.2%
	Frequency Resolution	Analog setting: 0.1% of max frequency
	Frequency Resolution	Digital setting: 0.01Hz
	Torque Boost	Automatic torque boost, manual torque boost 0.1%~30.0%
	Interior PID Controller	Convenient for making a closed-loop system
	Automatic Energy-Saving Running	Optimizes the V/F curve automatically based on the load to achieve power-saving running
	Automatic Voltage Regulation (AVR)	Can keep constant output voltage when power source voltage varies
	Automatic Current Limiting	Limits running current automatically to avoid frequent overcurrent, which will cause tripping
Environment	Enclosure Rating	Open frame, no enclosure — install inside a protective cabinet
	Temperature	–10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5%
	Humidity	5%~95%, without condensation
	Altitude	≤1000m; VFD will be derated if above 1000m
	Impingement and Oscillation	Normal running:<5.9m/s^² (0.6g); Transportation:<15m/s^² (1.5g)
	Store Environment	–20℃ to +60℃; no dust, no corrosive gas, no direct sunlight

Note: inverter.com VFD Cannot be used as a power source; it Can only be directly connected to an induction motor to control the motor speed.

Details

Power Terminals

The black terminal block along the bottom edge takes the single-phase supply and the three motor leads, kept apart from the control terminals on the left side of the board. At 4.7 A rated output, a single-phase supply draws more input current than the drive delivers, so size the supply wiring and protective device with that margin in mind. The large capacitor above the terminals smooths the DC bus.

Stacked Board Layout

Seen from above, the two circuit boards stack on the aluminum heatsink base and are joined by a ribbon cable. A large electrolytic capacitor stands at the rear corner, the microcontroller sits at the center of the control board, and a terminal block runs along the right edge. Stacking the boards keeps the footprint small for a 0.75 kW drive.

Aluminum Heatsink

In side view, a brushed aluminum heatsink plate runs the full height of the assembly, with the control and power boards mounted in parallel beside it. This model is (150 × 98 × 114)mm and 887g, taller and heavier than the 0.2 and 0.4 kW boards (665g each), so allow for the 114mm height and leave clear space around the heatsink for airflow.

Features

4.7 A Rated Output: Drives three-phase induction motors up to 0.75 kW (1 hp), with 150% overload for 1 minute and 180% for 3 seconds to handle loaded starts.
Single-Phase Supply, Three-Phase Output: Runs from 220–240V single-phase and outputs three-phase AC from 0 to the input voltage, at 0–1000 Hz, so no phase converter is needed.
Open-Frame Board for OEM Cabinets: At (150 × 98 × 114)mm and 887g, it mounts directly inside the host panel with no separate VFD housing.
V/F and Sensorless Vector Control: V/F mode suits fans and pumps. Sensorless vector mode gives 150% starting torque at 1 Hz and speed accuracy within ±0.5% for tools and conveyors.
PID, Energy Saving, and RS-485: The built-in PID controller closes a speed or process loop, the automatic energy-saving mode adjusts the V/F curve to the load, and RS-485 connects the drive to a PLC.

Use Cases

Small Machine Tools and Woodworking: Drill presses, lathes, and saws with three-phase motors can run from a single-phase workshop supply, with adjustable speed for different materials.
Pumps and Booster Sets: Packaged booster and circulation pumps up to 1 hp can use PID control to hold a steady flow or pressure while saving energy at part load.
Fans, Blowers, and Dust Collection: Ventilation and extraction fans can run at reduced speed when demand is low, which cuts power draw and noise.
Conveyors and Mixers in OEM Machines: Strong low-speed torque keeps belts and agitators turning smoothly, and RS-485 allows the machine's PLC to set speed and start or stop the drive.

Application Scenarios

Packaging Machinery

Non-enclosure mini VFD for texile and garment machinery

Textile & Garment Machinery

Printing Machinery

Non-enclosure mini VFD for pharmaceutical and food machinery

Pharmaceutical & Food Machinery

FAQ

Q1: Why does a single-phase VFD need to be sized above the motor rating?

A single-phase supply produces higher DC bus voltage ripple and higher input current than a three-phase supply. If the drive is sized exactly to the motor, it works harder and can fault repeatedly. Choose a drive whose rated current is comfortably above the motor's full-load current, or reduce the load.

Q2: Does a non-enclosure VFD need a cabinet?

Yes. With no housing, live parts are exposed, so mount the board inside a closed cabinet that protects it from dust, moisture, and contact. Leave clear space around the aluminum heatsink so heat can escape, and allow for the board's height when planning panel depth.

Q3: What are the temperature and altitude limits?

The drive operates from –10℃ to +40℃ and at altitudes up to 1000 m. Above 40℃, output derates by 5% for each additional 1℃, and it also derates above 1000 m. Humidity must stay between 5% and 95% without condensation.

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