The Drives & Motor Control we reverse-engineer, verify, and negotiate on your behalf. Pick a model or send us the spec.
Low-voltage variable-frequency drives, 0.4 kW to 630 kW, for pumps, fans, compressors and conveyors. Overload rating, harmonic mitigation, EMC class and the parameter set that actually leaves the factory are verified against the manual.
InquireMedium-voltage drives, 1 kV to 10 kV, on multilevel or current-source topology for large pumps, fans and mills. Cell structure, isolation transformer design, bypass arrangement and the cooling scheme are checked before the factory acceptance test.
InquireSolid-state soft starters, 7.5 A to 1200 A, for motor starting on pumps, fans and compressors. Ramp profiles, bypass contactor duty, in-line or inside-delta connection and start-cycle thermal capacity are verified against the duty schedule.
InquireDirect-on-line, star-delta and auto-transformer starters, plus motor protection relays, from 0.1 kW to 250 kW. Enclosure rating, contactor utilisation category on AC-3 duty, thermal setting range and the type-test evidence for the assembly are checked.
InquireSubstituting a drive has two layers. The hardware layer is rated power and voltage, overload capability (the current multiple and its duration on heavy or light duty), IP rating, cooling method, and whether a DC reactor or EMC filter is built in. The software layer is where the outcome is decided: control mode (V/F, sensorless vector, closed-loop vector), parameter set and macro configuration, communication protocol, and how it talks to your supervisory system.
The trap in a drop-in replacement is parameters that match while configuration does not. Across platforms, parameter numbers, function-code meanings and default macros can differ completely even at the same power rating. If interchangeability with an installed unit is required, the parameter mapping table belongs in the contract as a deliverable — not the word "compatible".
The motor side has to be verified in the same pass: dv/dt and common-mode voltage over long cable runs, whether an output reactor or du/dt filter is required, and the match between drive output and motor insulation class. Medium-voltage drives add a structural layer — bypass arrangement and isolation transformer design under a cascaded cell topology decide availability more than the headline rating does.
The method is the site standard: a free 48-hour initial screen returns go / hold / walk; Spec Match reverse-engineers parameters and maps them onto concrete models; Remote Audit reads ageing tests, load-bank results and the frozen factory parameter records at the works. You pay us and no commission flows from any factory, stated in writing.
The competitive landscape of this category was rewritten in a decade. China is the world's largest single market for drives, and the fastest to substitute.
China is the largest single market for drives worldwide, taking roughly a third of global demand, with low-voltage unit shipments counted in the tens of millions per year.
In 2025 domestic brands passed 60% of the mid- and low-voltage segment for the first time, and the leading Chinese manufacturer took first place in low-voltage drives at about 21.6%, ahead of the European brand that had held the top position at about 19.6%. An equivalent substitute no longer needs defending on principle.
More than 70% of industrial electricity is consumed by motors, and variable-speed control can cut that consumption by 20–50%. Energy-efficiency rules and the installed-base replacement they force are why Chinese factories keep investing in this class.
At the same power rating, parameter numbers, function-code meanings and default macros can differ completely between platforms. The trap in a drop-in replacement is parameters that match while the configuration does not — which is why the parameter mapping table belongs in the contract.
With the installed model, the control mode and what it talks to, we can tell you within 48 hours whether an equivalent will drop in, what has to be mapped, and which suppliers genuinely cover your duty class.
Independent · No kickbacks · Files that audit
Submit one supplier and get a free go / hold / walk read, no commitment, no sales call.
Written quote within 24 hours
