Frequency Inverter

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5.5 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0055

5.5kw variable frequency inverter with affordable price, converting single phase to 3 phase, input voltage 1 phase 220V AC ±15%, RS485 communication. Come with an IP20 enclosure rating, 1 phase to 3 phase inverter's speed regulation reaches 1:100. The 7.5hp frequency inverter with an intelligent cooling fan can work at (–10℃, 40℃). It is widely applied in small electronics, such as motors, refrigerators, fans, etc.

$697.14

5.5 kW Frequency Inverter, 3 Phase 230V, 380V, 460V

GK3000-4T0055G

5.5 kW variable frequency drive inverter, input voltage 3 phase 208V /380V /480V AC ±15% can be optional, and output voltage 3 phase AC 0~input. With V/F and sensorless vector control, 3 phase inverter can work at (–10℃, 40℃), RS485 communication mode, and IP20 enclosure rating. 7.5 hp three phase inverter is widely used for three phase asynchronous motors.

$415.08

7.5 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0075

7.5kw frequency drive inverter for sale, converting single phase to three phase, with 220V/230V/240V 1-phase input to 0~input voltage 3-phase output. The single phase to 3 phase inverter comes with RS485 communication mode, enclosure rating IP 20 can protect interior component from damage. Equipped with a clear LCD, a single to three phase inverter can work at (–10℃, 40℃).

$992.18

7.5 kW Frequency Inverter, 3 Phase 208V, 400V, 480V

GK3000-4T0075G

7.5kw variable frequency inverter, 3 Phase 230V, 380V, 460V, RS485 communication mode. The frequency drive inverter has V/F control and sensorless vector control, and the start torque is 150% of the rating torque at 1 Hz. Equipped with a cooling fan and protected by an IP20 casing, the 3 phase variable frequency drive is made of solid material and has strong impact resistance. Stable performance and easy to install.

$463.25

11 kW Single Phase to Three Phase Frequency Inverter

GK3000-2S0110

11kw frequency drive inverter with affordable price, converting single phase to three phase, rated current 32 A, input voltage 1 phase 220V AC ±15%, and output voltage 3 phase. Come with IP20 protection rating, single phase to 3 phase inverter has durable housing. Equipped with intelligent cooling fan, inverter single phase to three phase has strong heat dissipation function, applying for three phase motor on single phase 220 volt household power supply.

$1,453.95

11 kW Frequency Inverter, 3 Phase 220V, 400V, 460V

GK3000-4T0110G

11 kW variable frequency inverter, 3 phase 220V, 400V, 460V, Input frequency 50Hz/ 60Hz, output frequency 0~1000Hz, and RS485 communication mode. Equipped with an intelligent cooling fan, the 3 phase variable frequency drive. Equipped with intelligent cooling fan, the 3 phase variable frequency drive can maintain the working temperature of internal electronic components, protect the safety of electronic parts, and ensure stable performance.

$634.44

15 kW Frequency Inverter, 3 Phase 230V, 420V, 480V

GK3000-4T0150G

15kw variable frequency drive inverter, 20 hp 3 phase inverter with RS485 communication mode. Comes with cooling fans and IP 20 strong impact resistance, and the 3 phase variable frequency inverter works at (–10℃, 40℃). An Interior PID controller is convenient for making a closed-loop system. It is widely applied in Industrial production lines, construction, air conditioning systems, and energy generation.

$697.14

18.5 kW Frequency Inverter, 3 Phase 220V, 400V, 480V

GK3000-4T0185G

18.5kw 3 phase inverter for sale, RS485 communication mode, automatic voltage regulation (AVR) can keep constant output voltage when power source voltage varies. Come with an IP20 enclosure rating, a frequency drive inverter that has good impact resistance, and a durable shell. The powerful protection mechanism and versatile application of three-phase inverters make them suitable for various industrial, commercial, and residential purposes.

$992.18

22 kW Frequency Inverter, 3 Phase 220V, 440V, 480V

GK3000-4T0220G

22kW (30 hp) three phase inverter 208V, 440V, 460V, IP20 protection level, RS485 communication mode. Equipped with the electronic display screen, clear numbers, and convenient and timely adjustment of inverter parameters. Rated current 45A at 380V to 480V, 91A at 220V to 240V. The three-phase inverters with sensorless vector control are widely used in high-efficiency scenarios such as heavy machinery, motors, and equipment.

$1,264.30

30 kW Frequency Inverter, 3 Phase 240V, 420V, 480V

GK3000-4T0300G

30 kW (40 hp) reliable frequency inverter, 3 phase 240V/420V/480V for choice. Rated current is 60A at 380V ~ 480V, and 112A at 220V ~ 240V. Excellent overload capacity, as evidenced by 150% of rated current for 1 minute, 180% of rated current for 3 seconds. The 30 kW variable frequency drive has numerous applications across various fields and industries, such as industrial automation, pumping stations, wind turbines, irrigation pumps, food and beverage industry, power generation, etc.

$1,497.31

37 kW Frequency Inverter, 3 Phase 230V, 440V, 480V

GK3000-4T0370G

Affordable 37 kW frequency inverter on sale, three-phase 230V, 440V, 480V energy-saving variable frequency drive for 3 phase motor speed controls, high start torque, and high efficiency. The 50 hp inverter drive has a rated sync speed of ≤ ±0.5%, an IP 20 protection rating, and operates at (-10℃, 40℃). If the ambient temperature exceeds 40℃, the inverter drive will derate by 5% for every 1℃ increase.

$1,781.14

45 kW Frequency Inverter, 3 Phase 220V, 415V, 460V

GK3000-4T0450G

45 kW (60 hp) three phase 240V, 380V, 480V frequency drive inverter, output 3 phase AC 0~input voltage, input frequency 50Hz/ 60Hz. RS485 communication mode and IP20 protection rating. Automatic torque of variable frequency drive inverter boost, manual torque boost 0.1%~30.0%. It is widely applied in industrial transformers, motors, and so on.

$2,193.10

55 kW Frequency Inverter, 3 Phase 240V, 380V, 480V

GK3000-4T0550G

55 kW 3 phase inverter 240V, 380V, 480V with high frequency resolution, analog setting: 0.1% of max frequency; digital setting: 0.01Hz. Come with V/F control and sensorless vector control, a 75 hp high frequency inverter has IP 20 and works at (–10℃, 40℃). Humidity 5%-95%, without condensation. It is usually applied for motor drives, robotics, solar power systems, wind turbines

$2,591.20

75 kW Frequency Inverter, 3 Phase 220V, 380V, 460V

GK3000-4T0750G

75 kW (100 hp) 3 phase inverter with IP20 enclosure rating, output voltage 3 phase AC 0~input voltage, and Input voltage 3 phase 230V /400V /460V AC ±15%. The high frequency inverter with sensorless vector control can work at (–10℃, 40℃). Equipped with forced air cooling and RS485 communication mode, three phase inverter's speed regulation reaches 1:100.

$3,197.41

90 kW Frequency Inverter, 3 Phase 230V, 400V, 460V

GK3000-4T0900G

90 kW 3 phase inverter 230V, 400V, 460V, IP 20 enclosure rating, V/F control mode, 5%-95%, without condensation. The 3 phase variable frequency inverter with input frequency 50Hz / 60Hz has good performance, such as overcurrent protection, overvoltage protection, and undervoltage protection. The variable frequency inverter usually applies for electric vehicles, power generation, marine, and aerospace.

$3,741.60

110 kW Frequency Inverter, 3 Phase 208V, 380V, 460V

GK3000-4T1100G

Affordable price 110 kW frequency drive inverter, 3 phase 208V, 380V, 460V, IP 20 enclosure, and RS485 communication mode. 150hp variable frequency inverter input frequency can choose 50Hz or 60Hz. Start torque reaches 150% of rating torque at 1Hz. 3 phase inverter with output voltage 3 phase AC 0~input voltage can work at (–10℃, 40℃).

$4,882.54

160 kW Frequency Inverter, 3 Phase 240V, 400V, 480V

GK3000-4T1600G

Reliable 160 kW variable frequency inverter, 3 phase inverter input voltage 240V /420V /480V AC ±15% can be optional. RS485 communication, speed regulation reach 1:100. 3 phase variable frequency drive with IP20 protection, operates at (–10℃, 40℃). The 200 hp frequency inverter can vary the motor speed and reduce the inrush current of the motor during start-up. High start torque and high efficiency.

$6,979.36

220 kW Frequency Inverter, 3 Phase 220V, 415V, 460V

GK3000-4T2200G

220 kW frequency drive inverter, 3 phase variable frequency drive 220V, 415V, 460V. Come with sensorless vector control mode, three phase inverter has RS485 communication and an IP20 enclosure rating. Speed regulation up to 1:100 and input frequency reaches 50Hz or 60Hz. 300 hp inverter is widely used for industrial motor drives, renewable energy systems, UPS, EVs, etc.

$9,813.41

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.