Frequency Inverter

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0.4 kW Single Phase Output Frequency Inverter

GK3000-1S0004

0.4 kW frequency drive for sale, capacity 1/2hp, rated current 4A, input frequency 47~63Hz. Equipped with an LED screen, the frequency drive inverter has built-in heat-dissipation aluminum fins with excellent heat-dissipation performance. With a humidity of 90% RH, the single-phase inverter operating temperature is -10℃ to 40℃. The single-phase output frequency drives are widely used to control the speed of motors in various equipment such as pumps, ventilation systems, elevators, machine tool drives, etc.

$162.46

0.4 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0004

0.4kw frequency inverter for sale, convert single phase to three phase for AC motor speed controls, rated current 3A, input frequency 50Hz~60Hz, and output frequency 0Hz~1000Hz. With an IP20 enclosure rating and RS485 communication mode, the inverter can work at (–10℃, 40℃). The variable frequency drive single phase to 3 phase is usually applied in CNC machine tools, water pumps, fans, air conditioners, washing machines, etc.

$149.10

0.75 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0007

0.75 kW (1 hp) frequency inverter converts single-phase 220V–240V AC input to three-phase 380V output for AC motor speed control. Rated current 2.1 A, input frequency 50/60 Hz, output frequency 0–1000 Hz. V/F and sensorless vector control, built-in PID, RS-485 Modbus enabled. Output voltage selectable: 380V / 400V / 415V.

$309.15

0.75kw Frequency Inverter, Single Phase 120V Input, 1ph/3ph 220V Output

GK3000-SP1S1-d75

1hp (0.75kw) frequency inverter, single phase 120v input, 1 phase and 3 phase 220v output. Comes with a V/F control mode; the variable frequency drive inverter drives a 1ph/3ph AC motor with a 120V power supply and offers an RS485 communication interface. Frequency inverters from 50 Hz to 60hz can work at (–10℃, 40℃), and the Interior PID controller is convenient for making a closed-loop system. The variable frequency drive inverter is widely applied in industrial manufacturing, transportation, energy, construction, etc.

$284.61

1.5 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0015

1.5 kW (2 hp) frequency inverter with single-phase 220V–240V input and three-phase 380V output — purpose-built for running industrial motors where only household single-phase power is available. Rated current 3.8 A, overload capacity 150% for 60 s. Output frequency 0–1000 Hz; V/F and sensorless vector control; integrated PID for closed-loop pump and fan applications; RS-485 Modbus-RTU for PLC/SCADA integration. Output voltage is factory-configurable at 380V, 400V, or 415V.

$345.77

5.5 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0055G

At 5.5 kW (7.5 hp) and 13 A rated output, this mid-range VFD in the GK3000-CS series runs entirely from a single-phase 220V–240V supply. Output is genuine three-phase 380V AC, selectable at 400V or 415V for international motor ratings. Output frequency spans 0–1000 Hz; control modes include V/F and sensorless vector control; RS-485 Modbus-RTU and built-in PID are standard.

$726.89

7.5 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0075G

7.5 kW (10 hp) frequency inverter drawing single-phase 220V–240V input and delivering three-phase 380V output at 17 A continuous — sized for heavy-duty three-phase motors that a site's single-phase service must now support. Output frequency 0–1000 Hz; overload capacity 150% of rated current for 60 s. V/F and sensorless vector control; built-in PID; RS-485 Modbus-RTU. Output voltage factory-configurable at 380V, 400V, or 415V.

$1,095.67

1.5kw Frequency Inverter, Single Phase 120V Input, 1ph/3ph 220V Output

EM15-SP1S1-1d5

1.5kw frequency drive inverter, single phase 120v input, single phase and three phase 220v output. 2hp variable frequency drive inverter can drive single/three AC motors with 120v power. Rated current 7A, 50Hz/60Hz input, and V/F control mode. It offers an RS485 communication interface and supports the MODBUS-RTU communication protocol. With IP20 protection, the variable frequency inverter works at (–10℃, 40℃). The interior PID controller of the frequency inverter is convenient for making a closed-loop system.

$315.38

11 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0110G

11kW variable frequency drive supporting single-phase 220V/230V/240V input and three-phase 380V/400V/415V output; it directly drives a three-phase 11kW motor using single-phase power without requiring rewiring. Its wide-voltage design adapts to various power grids, ensuring stable output and smooth startup—ideal for industrial and commercial settings with limited power supply options.

$1,587.36

15 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0150G

This 15kW frequency inverter features a rated current of 32A and selectable three-phase output voltages (380V/400V/415V/440V/460V), making it compatible with motors of various voltage ratings. Equipped with an RS485 communication interface, it supports remote control and networking while reliably driving 15kW loads.

$1,854.63

18.5 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0185G

25hp (18.5kW) single-phase to three-phase frequency inverter with a rated current of 37A. It accepts single-phase 220–240V AC input and provides selectable three-phase output (380V/400V/415V/440V/460V), compatible with both 50Hz and 60Hz frequencies. Built-in AVR (Automatic Voltage Regulation) maintains a constant output voltage despite grid fluctuations, ensuring smoother motor operation—ideal for industrial and commercial applications with unstable power supplies.

$2,176.48

2.2kw Frequency Inverter, Single Phase 120V Input, 1ph/3ph 220V Output

GK3000-SP1S1-2d2

2.2 kW (3 hp) frequency drive inverter, single phase 120v input, single phase and three phase 220v output, with IP20 protection and RS485 communication interface. 3 hp variable frequency drive inverter can run 1ph/3ph AC motor via 120v power supply, work at (–10℃, 40℃). Equipped with an intelligent cooling fan, the 2.2kw frequency drive inverter with automatic voltage regulation can keep constant output voltage when power source voltage varies.

$346.10

22 kW Frequency Inverter, 1-Phase 220V to 3-Phase 380V

GK3000-CS0220G

This 30hp (22kW) single-phase to three-phase frequency inverter accepts a single-phase 220–240V AC input and supports both V/F control and sensorless vector control modes. It offers a speed regulation range of 1:100 and ensures stable low-speed operation. Equipped with an RS485 communication interface for remote control and networking capabilities, it is ideal for industrial applications requiring a three-phase motor to be driven by a single-phase power supply.

$2,455.97

0.75 kW Single Phase Output Frequency Inverter

GK3000-1S0007

0.75kW single phase output frequency inverter for sale, 1-phase input to 0~input voltage 1-phase output at 220V/230V/240V. Rated current 7A, input voltage single phase AC 220 ± 15%, and output voltage 1 phase. High-frequency inverter with output frequency 0~1000Hz has start frequency 0.40Hz~20.00Hz. Widely used in refrigeration systems, industrial equipment and mechanical engineering.

$195.82

4kw Frequency Inverter, Single Phase 120V Input, 1ph/3ph 220V Output

GK3000-SP1S1-004

4kw frequency drive inverter, single phase 110v-120v input, 1ph/3ph 220v-240v output, which drives AC motor via 120v power supply. RS485 communication interface, input frequency 50Hz/60Hz. With V/F control mode, the 5hp variable frequency inverter's start torque is 150% of the rating torque at 1 Hz. The variable frequency drive inverter with high-frequency precision, digital setting: max frequency x± 0.01%; analog setting: max frequency x± 0.2%.

$392.35

0.75 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0007

0.75kw frequency drive inverter for sale, convert single phase to three phase for AC motor speed controls, rated current 4A, speed regulation 1:100. With IP20 protection, variable frequency drive single phase to 3 phase has RS485 communication mode, and PID controller is convenient to make closed-loop system. The single phase to 3 phase inverter is usually applied in motor, pump, electric equipment and so on.

$159.32

5.5kw Frequency Inverter, Single Phase 120V Input, 1ph/3ph 220V Output

GK3000-SP1S1-5d5

5.5 kw variable frequency drive for sale, 120v input single phase, 220v output 1/3 ph, drives AC motor by 110v/120v power. Come with V/F control and RS485 communication mode, 7.5hp variable frequency inverter can work at (–10℃, 40℃), and interior PID controller of the frequency inverter is convenient to make closed-loop system. High precise speed regulation reaches 1:100 and start torque up to 150% of rating torque at 1 Hz. It is widely used in automated plant control, aerospace, building construction, renewable energy.

$453.86

0.75 kW Frequency Inverter, 3 Phase 240V, 415V, 480V

GK3000-4T0007G

Affordable price 0.75kw (1 hp) frequency drive inverter, 3 phase inverter 240V, 415V, 480V to be optioned. Rated current 21A at 380v~ 480V, 3.8A at 220V~240V. 3 phase inverter with sensorless vector control can work at (–10℃, 40℃). Come with RS485 communication mode, vfd inverter 3 phase has IP20 enclosure rating.

$206.49

1.5 kW Single Phase Output Frequency Inverter

GK3000-1S0015

1.5kW 2 hp single phase output frequency inverter with favorable price, Rated current 9.6A, output frequency 0~ 1000Hz. 1-phase 220v, 230v, 240v 50 Hz/60 Hz input, single phase 0-220v output. Equipped with a cooling fan, the variable frequency inverter shell is made of solid material and has good heat dissipation performance. The single phase inverter can work at (-10℃, 40℃), and the LED screen can monitor value changes in real-time.

$243.08

1.5 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0015

1.5kw variable frequency inverter, converting single phase to 3 phase, rated current 7 A, input voltage 1 phase 220V AC ±15%. With RS485 communication mode, inverter single phase to three phase has an input frequency of 50Hz/ 60Hz, and speed regulation reaches 1:100. Come with IP20 enclosure protection, variable frequency drive single phase to 3 phase is widely applied in motor, pumps, and fans.

$183.16

A frequency inverter — also called a variable frequency drive (VFD) or AC drive — controls the speed of an AC motor by adjusting the frequency and voltage of its power supply. Rather than running a motor at fixed speed, a VFD lets you set precise RPM for your application, cutting energy use by up to 50% compared to direct-on-line starting.

Internally, a frequency inverter works in three stages: a rectifier converts incoming AC to DC, a DC bus filters and stores that energy, and an inverter stage converts it back to AC at the target frequency. This AC-DC-AC process enables variable-speed control without mechanical components.

Inverter.com offers frequency inverters from 0.4kW to 220kW across four input/output configurations: single-phase in/out, single-phase to three-phase, three-phase to three-phase, and 120V input models for the North American market. All in-stock units ship from our Los Angeles warehouse.

The Difference between a Power Inverter and a Frequency Inverter

A power inverter and a frequency inverter serve fundamentally different purposes, even though both deal with AC power.
A power inverter converts DC input — from a battery, solar panel, or other DC source — into AC output at a fixed frequency (50 Hz or 60 Hz depending on region). It is used to run household appliances or equipment from a DC power source when grid power is unavailable.
A frequency inverter (VFD) takes AC input and outputs AC at a variable frequency and voltage, allowing precise control of motor speed. It does not change DC to AC — it reshapes AC to AC through a three-stage process: rectification (AC to DC), DC bus filtering, and inversion (DC back to AC at the target frequency).
The key distinction: a power inverter is an energy source converter; a frequency inverter is a motor speed controller.

Difference	Power Inverter	Frequency Inverter (VFD)
Input	DC (battery/solar)	AC (grid power)
Output	AC at fixed frequency (50/60 Hz)	AC at variable frequency (0–400 Hz)
Primary Uses	Run AC devices from a DC source	Control AC motor speed & torque
Working Principle	DC → AC	AC → DC → AC (AC-DC-AC)
Tipical Applications	Off-grid power, vehicle power	Pumps, fans, CNC, conveyors

Why Choose a Frequency Inverter?

Adjustable torque limit: A VFD lets you set a precise torque ceiling to protect motors from overload — control accuracy typically reaches ±3–5%, far tighter than thermal protection alone.
Energy savings up to 50%: Fan and pump loads follow the Affinity Laws — reducing motor speed by 20% cuts power consumption by nearly 50%. A VFD eliminates the wasted energy of throttling valves and dampers.
Controllable stopping mode: VFDs support multiple deceleration profiles (ramp-to-stop, free-coast, DC braking) — reducing mechanical stress on motors and extending equipment service life.
Reversible operation control: Reversing motor direction requires only a phase-sequence change in software, with no additional contactors or mechanical reversing switches needed.
Reduce mechanical transmission: When combined with synchronous motors, vector-controlled VFDs eliminate gearboxes and mechanical couplings, reducing system footprint and maintenance requirements.

How to Select a Frequency Inverter?

Input voltage and phase: Match the VFD's input voltage and phase configuration to your available power supply. Size the VFD's rated current at least 10% above the motor's nameplate current — but avoid oversizing beyond one step, which adds cost without improving control accuracy.
Load type: For constant-torque loads (hoists, compressors, extruders), choose a heavy-duty rated VFD and verify the drive's overload capacity — typically 150% for 60 seconds. For variable-torque loads (fans, pumps), standard duty is sufficient.
Braking requirements: If your application involves frequent start/stop cycles or requires holding a load in position (hoists, cranes), look for a VFD with a built-in braking unit or dynamic braking resistor support. Regenerative braking recovers energy but adds upfront cost.
Sensor and PID support: Applications like pumps and HVAC systems benefit from VFDs with built-in PID control, which can close the loop directly with a pressure or temperature sensor — eliminating a separate controller and reducing wiring complexity.
Communication ports: For SCADA integration or PLC control, verify the VFD supports the required protocol — RS-485/Modbus is standard; some applications require CANopen or Profibus. All GK3000-series VFDs include RS-485 Modbus as standard.
Environment rating: Check the VFD's IP rating against your installation environment. Standard IP20 suits clean indoor panels; washdown or outdoor installations require IP54 or higher. Operating temperature range and altitude derating should also be confirmed before ordering.