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Frequency converters 185.0 kW

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185 kW Variable Frequency Drives — Speed Controllers for High-Power Motors

185 kW variable frequency drives (VFDs) are industrial-class AC drives for controlling asynchronous motors on 3×380 V three-phase networks. They are used wherever precise speed regulation of large mechanisms is required: pump units, compressors, fans, conveyors, and press equipment. Browse the full VFD catalogue or narrow your selection to adjacent power ranges: 160 kW and 200 kW.

Applications for 185 kW VFDs

At 185 kW, the nominal motor current reaches 330–360 A. This drives specific requirements for the drive: reliable heat dissipation, overload tolerance (150% overload current), and support for continuous duty cycles. Typical application areas:

  • Water supply and sewage — pumping stations with 185–200 kW motors, loop pressure regulation, dry-run protection.
  • HVAC and ventilation — axial and centrifugal fans for large industrial buildings, mines, and tunnels.
  • Industrial compressors — screw and centrifugal compressors with 185 kW electric drives, soft start without current spikes.
  • Conveyors and transport systems — stepless speed control of belt conveyors, chain conveyors, and hoists.
  • Metalworking and presses — main spindle and hydraulic pump drives for 185+ kW presses.

185 kW VFD Models In Stock

Chastotnik.ua carries 5 in-stock models rated at 185 kW, covering different technical configurations and price points. Compare key specifications before selecting:

Model Brand Current (A) f max (Hz) EMC Filter Built-in PLC
AC310-T3-185G/200P-L Veichi 340 600 Option Yes
AC70-T3-185G/200P Veichi 340 400 No Yes
FR-F840-04320-E2-60 Mitsubishi Electric 358.6 590 Yes Built-in
e.f-drive.pro.185 ENEXT 340 300 Yes No
DX100-4T1850Q Simphoenix 360 1000 Yes No

Best-seller: Veichi AC310-T3-185G/200P-L — model with built-in PLC, universal vector control, and dual-rating support (185 kW heavy-duty / 200 kW normal-duty). Top-selling 185 kW VFD over the past 12 months on Chastotnik.ua.

Other VFD Power Ratings

If 185 kW does not match your motor, see adjacent selections: 160 kW (11 models), 200 kW (7 models), 132 kW (12 models), 110 kW (18 models), 250 kW (7 models). For soft starting of high-power motors, also consider soft starters.

Warranty and Support

All 185 kW VFDs come with official manufacturer warranty from 12 to 24 months. Chastotnik.ua engineers provide technical consultation on selection and commissioning. Delivery across Ukraine via Nova Poshta or freight delivery for oversized units. Payment by bank transfer with VAT invoice for companies and sole traders.

Frequently Asked Questions

What is a variable frequency drive and how does it work?

A VFD is an electronic device that converts AC mains voltage to DC (rectifier stage), then back to AC with adjustable frequency and amplitude (inverter stage). By varying the output frequency from 0 to 600 Hz, it smoothly controls the rotational speed of an AC induction motor from standstill to rated speed and beyond, while limiting starting current to 1.5× rated.

How do I size a VFD for my motor?

The VFD power rating should equal or exceed the motor nameplate power. For pumps and fans (variable torque), select based on the motor rating. For conveyors, cranes, and crushers (constant torque or heavy starting), choose one power step above — for example, for a 4 kW conveyor motor, we recommend a 5.5 kW VFD. Also verify that the motor's rated current does not exceed the VFD's current rating.

Can I run a three-phase 380V motor from a single-phase 220V supply?

Yes, you need a VFD with single-phase 220V input and three-phase 380V output, such as the Veichi AC70E or AC10 T/S2 variant. Power is limited to 2.2–4 kW depending on the series. The VFD not only starts the motor but also provides soft starting, speed control, and overload protection.

What is the difference between scalar and vector control?

Scalar control (V/f) maintains a constant voltage-to-frequency ratio — a simple, reliable method for pumps, fans, and compressors. Vector control (SVC, FOC) calculates motor current and flux vectors in real time, delivering 150–200% rated torque at low frequencies. Vector control is essential for conveyors, elevators, extruders, cranes, and CNC machine tools.

Why do I need an EMC filter in a VFD?

An EMC (electromagnetic compatibility) filter reduces high-frequency interference that the VFD generates in the power supply and airwaves. It is mandatory for facilities with sensitive equipment (medical, laboratories, server rooms), residential buildings, and when the cable between VFD and motor exceeds 25 m. The Veichi AC10, Delta VFD-E, and INVT GD20 models include a built-in Class C3 EMC filter.

How much energy does a VFD save?

On pumps and fans, savings range from 20% to 60% depending on the load profile. Power is proportional to the cube of speed (P∝n³): reducing speed by 20% halves energy consumption. If equipment typically operates at 70–80% of rated speed, average savings are approximately 40%. Payback period for a VFD on a pumping station is 6 to 18 months.