
AC Motor
AC motor repair
at DV Group
Test solutions guaranteeing 100% functional products
A variety of tools adapted to your needs:
- Winding equipment: megaohm meter, milliohm meter, probe into motor protection: CTP/PTC/PT100, Baker Index Control.
- Mechanic’s equipment: ball bearing assembly using manufacturer’s specially designed tool, induction heating, machining equipment, etc.
- Specific tools: shock wave analysis, impedance analysis, vibration measurements, balancing, etc.
- Spare parts in stock (original equipment or adaptable)
- Load bench: AC starter up to 1,000 A / load on impact 1,500 A.
Technical Procedures
- Procedure before dismantling
- Inspect motor connectors.
- Metrological check of bearing seatings, joint surfaces, flanges, shaft, etc.
- Check lubrication and evacuation ducts
- Electrical inspection (insulation, resistance, inductors, etc.) according to the data supplied by the manufacturer.
- Cooling control: ventilation and water circuit.
Repair Procedure
- Repair: chromium plating, ringing, molten metal cladding by spraying of the various joint surfaces, complete cladding of the drive shaft
- Electrical inspection: ageing, pollution: BAKER index, state of winding
- Repair: winding and dip impregnated Class H: High Temperature, turning the ring set (wound rotor motor)
Test/validation procedure
- Tests: no-load tests in rotation on a platform up to 1,600 kW
- Load tests up to 600 kW at 3/4 load – 50 / 60 Hz
- Vibration measurement and signature
Traceability procedure
- Diagnosis and testing history
- Traceability produced by: machine number / customer number / DV GROUP number.
- Test sheet and qualification/test certificate
Case study :
Our other solutions
for Electromechanical maintenance