variable frequency drive
Variable Frequency Drive Sourcing is an independent sourcing partner for US business buyers of a variable frequency drive. We collect a written motor and network duty, approach factories that build that form, and compare wholesale quotations on the same voltage, current, overload and enclosure basis. We do not manufacture equipment, hold a price list or program your PLC.
Supply
State input voltage as AC, with phase count and frequency in Hz. A 230 V single-phase brief is not a 480 V three-phase brief.
Control
Identify analog 0–10 V or 4–20 mA, digital I/O, and any fieldbus such as Modbus, PROFINET or EtherNet/IP as optional line items.
Load
State motor power as kW and as HP separately, full-load current in A, and whether the duty is constant torque or variable torque.
Two buyer paths for a variable frequency drive
Buying for a project
- Device schedule with motor kW/HP, full-load amps and supply voltage per line
- Control mode (V/f, sensorless vector, PID) frozen before quotation, not after
- Delivery aligned to panel build or site milestones you name
Buying for resale or stock
- Repeatable specification per model, including overload class and enclosure
- Quantity breaks, packing and whether EMC filters ship inside the chassis
Procurement checks before a factory can answer
Rating
Confirm voltage, phase, frequency in Hz and output current in A. Overload 110 percent variable-torque and 150 percent constant-torque are different product classes.
Protection
Confirm enclosure as a NEMA type or an IP code. Those systems are not treated as equivalent on this site.
Interface
Confirm terminals, mounting, analog/digital I/O and whether a fieldbus card is in the price.
Files
List datasheet, listing record for the named model, EMC statement and packing data. Family brochures are not model evidence.
Questions buyers ask before opening a drive brief
Which purchasing requirements separate a variable frequency drive from neighbouring options?
A variable frequency drive is an AC motor speed controller with rectifier, DC bus and inverter output. Neighbouring options on this site include a general-purpose chassis, an HVAC fan and pump drive, an enclosed NEMA rated drive, a sensorless vector drive and a drive with integrated EMC filter. Those names are not interchangeable stock codes. A soft starter ramps voltage without synthesizing a variable-frequency output and belongs on a different cluster.
What does an independent sourcing request have to contain before factories can answer?
Write product type, intended application, quantity by specification, motor kW and HP as two figures, full-load current in A, supply voltage with phase and frequency, overload class, enclosure, control interface, destination and requested delivery window. Optional budget and supplier preference may travel with that text. Without those fields, returned offers cannot be lined up on one basis.
Which part of the variable frequency drive specification stays the buyer decision?
You approve the final specification, commercial terms and destination compliance. We restate gaps, shortlist factories and compare offers. We do not sign electrical design, perform site installation or publish certification badges for models we have not verified in this batch. Continue on inquiry options, sourcing services or the inquiry form.