AC Motor Rewinds & Repairs

AC Motor repairs and rewinds are the principle M&E services we specialise in here at Mawdsleys. Furthermore, we understand that when any AC Motor failure occurs, it can have a serious impact on both yours and your customers businesses.

Our skilled and qualified M&E Engineers have many years’ experience working with all different types and sizes of AC motors. We can repair, refurbish and rewind your AC Motor within an agreed lead time – ensuring minimal disruption.

We provide complete rewinds for motors of all sizes, from 1kW to over 1,000kW using industry verified quality processes and operating procedures.

Contact Mawdsleys Today for Fast AC Motor Support

☏ 0117 955 2481

✉️ enquiries@mawdsleysber.com

Please be advised: We exclusively handle enquiries for commercial electric motors within the UK, with the exception of specialist naval and marine applications.

Full Mechanical and Electrical Inspection

With a network of couriers at our disposal, we can collect or you can deliver to our Motor Repair Facility based in the South West. Your AC motor is given full traceability as part of our ISO 9001:20015 Accreditation.

A full mechanical and electrical inspection is carried out, with results recorded highlighting the required scope of repair to your AC motor.

The AC Motor winding is checked for faults, resistance, and insulation quality. If a fault is found in the stator, it is then rewound to the exact specification using high grade enameled copper wire and impregnated to the correct class of insulating varnish.

The rotor is then checked for condition and balance. Mechanically, the motor dimensions and tolerances are confirmed.

Why Choose Mawdsleys for your Motor Rewind?

We are AC motor rewind experts offering nationwide coverage, our benefits to customers include:

In house expertise including rewinds team, machine shop, and balancing
State of the art test facility
Nationwide coverage from our workshop in the South West
Quality of repair – all repairs are tested and repaired to the manufacturer’s specification
All work is recorded on a detailed job card and logged in our digital system. We keep an asset register of serviced equipment
Repair service includes a one year guarantee
All rotating items are balanced to G1.0 balance grade
All bearing journals and housings will be measured to ISO tolerances.
Your AC motor is given full traceability as part of our ISO Standard 9001:2015

Fast Support

Fully Accredited

National Coverage

In-house Workshop

Common Faults With AC Motors

We often see the same faults with AC motors, below and some of the most common faults with AC motors and how you can identify them.

Fault	Notices
Open Circuit on Windings	Motor Buzzes or Hums and won’t work
Earth Fault	Motor Dead and won’t work
Bearing Failing	Noise, Vibration, Excess Heat on Drive End or Non Drive End
Bearing Collapse	Shaft Damage, Core Damage, Winding Damage
Rotor Problems	Movement in Shaft, Bearing Journals undersized
Misalignment	Premature Coupling Failures, Vibration of Motor
Bent Shaft	Premature Bearing Failures, Vibration

Our AC Motor Rewind Process

Our AC motor rewind process is as follows:

1. 1. On receipt of your motor, a full mechanical and electrical inspection is carried out, with results recorded highlighting the required scope of repair to your AC motor
  2. If the motor can’t be removed, our site services team can carry out repairs in situ
  3. We then test the windings for earth & resistance readings
  4. The motor windings are then stripped
  5. Core is cleaned before being re-insulated
  6. Wind coils using the exact specification using high grade enamelled copper wire
  7. Inserts into slot
  8. The coils are connected
  9. Windings are then tested for earth & resistance
  10. impregnated to the correct class of insulating varnish
  11. Windings are then stoved
  12. The motor is then re-assembled with new bearings, O-rings and gaskets
  13. The rotor is then checked for condition and balanced
  14. Finally, the motor is testing in our state of the art test facility.

Repair or Replace?

If your AC motor does fail, companies may experience downtime on production – which can be costly. When faced with this problem, businesses must decide between repairing, rewinding or replacing their motor, here are a few things to consider when making this decision:

Age of the motor – if your motor is old, it could be the case that replacing it with a newer, more energy efficient motor will save you money in the long run. However, dependent on what the problem is, replacement is likely to be a much bigger investment than a rewind or repair.
Use of the motor – The more horsepower a motor delivers, the greater the operating cost. If a smaller motor that is used infrequently begins to underperform, the cost to the business may not be substantial even if the motor is inefficient, in this scenario a repair of the motor can be a cost effective solution. If the motor is a larger one in constant use, the cost of underperformance will soon outweigh the cost of a repair or replacement.
Time – Downtime of an important motor can be extremely costly for business. Having a motor repaired can take as little as 24 hours whereas acquiring and installing a replacement motor is likely to take longer.

Who We Work With

Working with a varied client base, ranging from small private firms to major blue chip companies, we know how important delivering quality work to a set budget and agreed lead time is. Sectors we often work with include:

AC Motor Rewind Experts

We offer our M&E Services to businesses across the UK, offering national coverage. To find out how we can help with your AC Motor Repair, please contact us on 0117 9552481 or alternatively you can fill in our Contact us form and we’ll get back to you.