VFD & Frequency Inverter Sourcing from China
1 resources tagged with "Drives"
Drives sourcing from China is dominated by variable frequency drives (VFDs) for motor control in pumps, HVAC, and factory automation. A common OEM range spans 0.75kW to 315kW on 3-phase 380–480V AC, with CE, UL 61800-5-1, and RoHS as the baseline certifications buyers ask for. OEM orders often start around 50 units, with lead times of 4–6 weeks once the firmware parameter set is locked.
When sourcing VFDs, the failure points are thermal derating and EMC compliance — a drive rated for 22kW at 40°C may quietly derate at higher ambient, so check the datasheet curve. UL 61800-5-1 is the safety standard that matters for North American panels; ask whether the certificate is the factory's own or borrowed from a sister model.
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FAQ
What MOQ should I expect for OEM VFDs?
Around 50 units is typical for a private-label VFD with custom firmware defaults or a branded faceplate. Standard off-the-shelf models can sometimes be bought in smaller quantities, but custom enclosures or display branding push the minimum up.
Which certifications matter for variable frequency drives?
CE for the EU, UL 61800-5-1 for North American safety, and RoHS for material restriction. For sensitive installations also check the EMC category (C1–C4) on the EU declaration, since it determines whether an external filter is required.
How do I confirm a VFD meets its power rating?
Request a load test report and check the thermal derating curve against your ambient temperature and switching frequency. Many drives that pass at 40°C and low PWM frequency derate sharply under real pump or compressor duty.
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