AC & DC Motors
HT and LT machines across the full frame range.
High quality rewinding and comprehensive services for all types of rotating electric machines. Fast turnaround, minimising downtime.
01 / 09
Authorised service centre for
- Kirloskar
- WEG
- Crompton
- Jyoti
- NIDEC
About us
35 years as a maintenance and reliability partner to industry
Founded in 1989, Pearl Engineering brings over 35 years of expertise in electric motor repair with a strong focus on quality, precision and timely service. We have built lasting trust with our customers through superior workmanship.
From a single workshop in Coimbatore we have grown into a vertically integrated facility. Machining, winding, impregnation, balancing and testing all happen under our own roof, on our own equipment, under our own quality control.
Our work is built to meet global industry standards. We support all major industrial sectors:
- Textile
- Steel
- Cement
- Sugar
- Paper
- Foundries
- Petroleum
- Oil & Gas
- Wind
- and more
One of our founders is an ex-executive engineer of Kirloskar Electric Co Ltd, having a versatile experience of more than 10 years on the shop floor and on the field in design and servicing of all types of rotating electric machines.
Behind all of it are our engineers and technicians with decades of hands-on experience, which has led us to become a very sought after maintenance and reliability partner for our vast industrial clientele.
Since 1989
Coimbatore, Tamil Nadu
1989
Established
Expert team
Highly skilled and experienced workforce
Vertically integrated
All operations done in house
5 MW
No-load test capability
1 year
In-service warranty
Machines we work with
All types of rotating electric machines and more
All our services are done in house, enabling us to maintain the highest quality standards.
Alternators & Induction Generators
HT and LT, including generator sets and captive units.
Wind Turbine Generators
Single and dual speed WTG rewinding and overhaul.
Magnetic Coils & Chucks
Rewinding and reconditioning of magnetic coils and chucks.
Servo Motors
Rewinding, bearing replacement and reassembly of servo drives.
Special Application Motors
Precision grinding spindles, water- and oil-cooled motors, high-speed compressor motors and other critical-duty machines.
Our services
All services done under one roof in our vertically integrated facility
Each of these done in house by our highly skilled and experienced engineers and technicians.
01
Rewinding
Complete rewinding of HT and LT stators, rotors and armatures. Wound to recorded data in the correct insulation class, then impregnated and cured before it leaves the floor.
02
Squirrel Cage Rotor Rectification
Bar and end-ring repair or replacement on squirrel cage rotors, followed by testing to confirm the cage is electrically sound end to end.
03
Shaft Replacements
New shafts turned in our own machine shop to drawing, or reverse engineered from the failed shaft where no drawing exists. Bearing housings and end shields reclaimed to correct fits.
04
Dynamic Balancing
Rotor balancing up to 3 tonnes on our own balancing machine, with a balance report supplied for every rotor.
05
Core Testing and Restacking
Loop testing to find hot spots and inter-lamination faults, lamination repair, and full core restacking where the core is beyond recovery.
06
VPI Varnishing and Oven Curing
Vacuum pressure impregnation in our own VPI plant, followed by a controlled oven cure that turns the varnish into a hard, solid, protective mass.
07
Overhauling and Bearing Changes
Strip-down, cleaning, bearing replacement and reassembly to OEM clearances, with the machine run on no-load trial before dispatch.
08
On-Site Service and Technical Support
Where a machine cannot travel, our engineers do. Bearing changes, diagnostics, in-situ inspection and technical support at your plant.
09
Testing and Test Certificates
High pot and surge testing, insulation resistance and no-load trials, with a detailed test certificate handed over alongside the machine.
10
Failure Analysis and RCA Reports
Complete machine failure analysis with a written root cause report your maintenance department can act on, so the next failure is prevented rather than repeated.
Why choose us
Reasons our customers keep sending machines back to us
Not claims. The things we actually do differently, and what each one means for your plant.
01
Premium quality rewinding and repair
Graded insulation systems, correct winding data and workmanship that is checked at every stage rather than only at the end.
02
Fast turnaround
An experienced team and in-house capacity across every process means less waiting between steps, and less downtime for you.
03
Up to 1 year in-service warranty
Every rewind we deliver carries an in-service warranty of up to one year, because we follow industry-standard procedures end to end.
04
Vertically integrated facility
Machining, rewinding, impregnation, balancing and testing all happen here. Nothing is subcontracted, so quality control stays with us.
05
Highly skilled personnel
Technicians and engineers with multiple decades of experience on HT and LT rotating machines.
06
On-site service and technical assistance
Where a machine cannot travel, our engineers do. Bearing changes, diagnostics and failure investigation, at your plant.
07
Complete failure analysis and reporting
Detailed reports on what failed and why, so your maintenance department can prevent the next failure instead of repeating it.
08
Industry-standard procedures
Documented, repeatable process at every stage, with test records handed over alongside the machine.
Our process
Standard operating procedures enable us to maintain highly accurate results consistently
Every machine follows the same documented route. The status of each machine is continuously tracked and updated to the customer periodically.
01Inspection & Diagnosis
The machine is received, stripped and inspected to establish exactly what has failed.
02Precision Dimensional Inspection
Shaft, housing and fit dimensions are measured and recorded before anything is reported or quoted.
03Report & Quotation
A written fault report goes to the customer along with a quotation for the work required.
04Bearing Housing Machining
Worn housings are machined and reclaimed to correct bearing fits.
05Shaft Machining
Shafts are machined or replaced in our own machine shop, to drawing.
06Burnt Winding Removal
The failed winding is stripped out in our winding removal machine, and ensured that no damage occurs to the core.
07Core Testing
The stator core is loop-tested for hot spots and inter-lamination faults.
08Core Restacking
Where the core is beyond repair, laminations are restacked and re-tested.
09Rewinding
The machine is rewound to recorded data using dual coated enamelled copper wire of the correct insulation class.
10HV and Surge Testing
High pot and surge testing to meet our stringent QC standards.
11Varnishing (VPI)
Vacuum pressure impregnation improves electrical, mechanical and thermal performance.
12Oven Curing
Oven curing turns a soft wet varnish coat on motor windings into a hard, solid and protective mass.
13Dynamic Balancing
The rotor is balanced on our own machine so the rebuilt assembly runs true, with a balance report recorded.
14Assembly & No-Load Testing
The machine is reassembled and run on no-load trial on our test bed.
15Test Reports
Detailed test reports are compiled and handed over with the machine.
16Painting & Dispatch
Final painting, protection and dispatch back to your plant.
Our facility
Key infrastructure highlights
A vertically integrated workshop: the lifting, machining, impregnation and testing capacity to take a machine from strip-down to no-load trial without it ever leaving our floor.
20tonne
Overhead cranes
Lifting capacity up to 20 tonnes across the workshop bays.
3tonne
Dynamic balancing machine
Rotor dynamic balancing up to 3 tonnes, with balance reports.
150tonne
Hydraulic press
For rotor, bearing and coupling work up to 150 tonnes.
450frame
VPI chamber
Vacuum pressure impregnation tank taking machines up to 450 frame.
600+frame
Curing ovens
Large ovens capable of baking machines over 600 frame.
5MW
Test benches & test beds
No-load trials for machines up to 5 MW.
15kV
HV / hipot tester
High-voltage insulation testing on every rewound machine.
12kV
Surge tester
Surge comparison testing to prove inter-turn insulation.
In-house
Machine shop
Lathes, shaft cutting machines, hydraulic presses, drilling and milling machines.
Gallery
Some images from our workshop and field work
A sample of the rewinds, overhauls and on-site jobs we have completed. More photographs are added as work is dispatched.
Spares
Spares for all brands of machines
We supply spares for the machines we rewind and overhaul. Tell us the machine and rating and we will source the part.
Slip Rings and Commutators
New and reconditioned assemblies, skimmed and undercut to profile.
End Covers
End shields and covers, supplied new or reclaimed to correct fits.
Cooling Fans
Replacement fans matched to frame size and direction of rotation.
Fan Covers
Fabricated cowls and fan covers to suit the machine.
Terminal Blocks
Terminal plates, links and studs for LT and HT machines.
Terminal Boxes
Fabricated terminal boxes with glands, to standard or to drawing.
Carbon Brushes
Brushes in the correct grade and size for slip ring and DC machines.
Brush Holders
Holders and brush gear assemblies, new or reconditioned.
Alternator AVRs
Automatic voltage regulators for alternators and generator sets.
Diodes and RRA
Diodes and rotating rectifier assemblies for brushless alternators.
Pump Spares
Wear parts and rotating assemblies for pump sets.
Casting and Fabrication Work
Cast and fabricated parts made to drawing or to sample.
Forced Cooling Systems
Forced cooling systems for motors of all frame sizes.
Industries we serve
Wherever a stopped motor stops production
Continuous-process plants cannot wait. Most of our work is for industries where an hour of downtime costs more than the repair.
Textile
Cement
Steel
Paper
Rubber
Foundries
Oil & Gas
Power Generation & Utilities
Manufacturing & Continuous Process
Wind
Mines & Crushers
Petrochemical
Some of our esteemed clients
LMW Group
ZF Wind Power
Leap Green Energy
Pioneer Wincon
TNPL
Rieter
Premier Group
Shanthi Gears
SE Forge
Eppinger
Flowserve
KG Group
Get in touch
Tell us what service you require
Send us the machine details and we will come back with an inspection plan. If it is a breakdown, call. We pick up.
Workshop & office
178, SomayampalayamKalapanaikanpalayam Piruvu, Kanuvai Post
Coimbatore 641 108, Tamil Nadu
GSTIN 33AAJFP8532D1ZC