VFD repair: AC drive, inverter and servo drive repair
Repair of gate-driver cards, IGBT modules, rectifiers, braking choppers and encoder interfaces. Drives are run with a real motor before they go back.
- Free diagnosis
- Quote before any work
- 6-month warranty
- India and worldwide
What we repair
Drive failures are often caused by a surge, a short on the motor side or aged DC-link capacitors. We repair the power stage and the control electronics, and check the gate signals so the fault does not come straight back.
Every drive is tested with a motor under load, and boards can be conformal coated against conductive dust where your site needs it.
Common brands and models
How we test it
- Motor test. Drives are run with a real three-phase motor, not just powered up.
- Gate signals. Dead-time and switching waveforms verified on the oscilloscope.
- Snubbers. Snubber and DC-link components checked and replaced.
- Coating. Conformal coating against conductive dust and moisture.
Common faults we fix
Symptoms engineers send us most often, and what we do about them.
Overcurrent or IGBT fault trips
IGBT modules, gate drivers and current sensing checked and repaired.
DC bus undervoltage or overvoltage
Rectifier, pre-charge circuit, DC-link capacitors and braking chopper repaired.
Dead drive, no display
Switch-mode supply and control board repaired.
Encoder or resolver feedback error on servos
Feedback interface and cable-side protection repaired.
Ground fault or phase loss
Output stage and measurement circuits tested and repaired.
Fan or overheating alarms
Cooling fans, temperature sensing and heatsink contact restored.
How the repair works
1. Send the unit
Courier it to our Vadodara lab from anywhere in India or abroad, with a note of the fault.
2. Free diagnosis
We find the failed components and send you the exact price and turnaround.
3. Repair and test
After your approval we repair at component level and test under real operating conditions.
4. Back with warranty
The unit returns to you with a 6-month warranty on the repair.
Frequently asked questions
Do you test drives with a motor?
Yes. Drives are run with a motor and load-tested, not only powered on.
Can you repair servo amplifiers?
Yes, including Fanuc servo amplifiers, Yaskawa Sigma and other servo drives.
Which drive brands do you repair?
ABB ACS800 and ACS880, Yaskawa A1000 and GA700, Schneider Altivar, Danfoss VLT, Allen-Bradley PowerFlex, Mitsubishi FR, Siemens SINAMICS and others.
How long does a drive repair take?
Standard turnaround is 3 to 4 working days from receipt of your PO, when components and schematic are available with us. Priority (24 to 48 hours) and breakdown service are available on request.
Send us your faulty unit for a free evaluation
Tell us the make, model and fault. We reply with a diagnosis plan and a clear quote, and every repair carries a 6-month warranty.
- Call or WhatsApp+91 95108 31507
- Lab addressB/203, 2nd Floor, The Empire, Undera-Koyali Road, Undera, Vadodara, Gujarat 391330, India
- Lab hours (IST)Monday to Friday, 9:00 to 17:00; Saturday, 10:00 to 15:00; Sunday closed