Motor winding equipment
The glossary (Section 5) is intended for the purchaser’s benefit and is not necessary as part of the documentation accompanying the motor. Sections 1-4 are part of the package that accompanies the motor to the service center. Motor Repair Form (For purchaser to describe the motor’s condition, operating environment, and desired service).Quality Control (Requirements for Calibration, Materials, and Documentation).Repair Procedures (Required procedures use in conjunction with EASA Standard).Introduction (Introduction and General Requirements).For motors falling outside this description, a more comprehensive specification must be developed. The DOE repair specification is intended to cover routine repair and re-wind of low-voltage random-wound three-phase AC squirrel cage induction motors. Department of Energy’s office of Industrial Technologies of the Bonneville Power Administration. Said specification is available from the U.S. Motor repair specification for a low voltage induction motor (reference – DOE/BP-2748). You will also notice the quality of the laminations as compared to 1a. This is good as it forms the coils into a firm mass. The 1b stator utilizes larger binding material in addition, notice the resin deposition between the wires. In image 1a, notice the small diameter binding as well as the quality (lack thereof) of the laminations. See Figure 1a & 1b Above. Figures 1a and 1b depict stator construction from two different motor manufacturers. Therefore, to ensure a quality product, every motor re-wind requires a clearly defined specification written specifically for that motor.
![motor winding equipment motor winding equipment](https://2.imimg.com/data2/IO/VI/MY-659098/heavy-duty-motor-coil-winding-machine-500x500.jpg)
If this data doesn’t convince you of the importance of a well-executed vendor qualification process, vendor audit, and repair specification, perhaps this will:įACT: No two motors (OEM’s) are built the same.
![motor winding equipment motor winding equipment](https://image.made-in-china.com/2f0j00PnoEqefRCIkd/Electric-Motor-Winding-Equipment-Manufacturer-with-Winding-Solution.jpg)
#Motor winding equipment full
Only the largest repair shops had a full complement of test equipment for detailed analysis, including before and after testing.49% of shops perform a no-load test prior to performing repair and rely upon the tests performed to determine the motor condition.Most of the repair shops viewed resistance testing as a method to evaluate DC electric motor fields only.Only 1.5% of surveyed repair shops used any form of quality assurance testing. Of the repair shops that used quality assurance procedures, 40% were repair procedure specifications, 25% were test specifications, and 21% were EASA standards.Only 33% of repair shops used written quality standards and were familiar with any type of quality assurance procedures.Although insulation, winding resistance, vibration, phase balance (surge or MCA) and core loss testing should be done routinely as part of a quality repair, only insulation testing was performed routinely.Only 4% modify windings for reliability or energy improvements.81% of repair shops reported that they modify windings because of equipment limitations or shop preference.The following data was compiled from a study titled, Motor Diagnostics and Motor Health Study “Industrial Motor Repair in the United States”. This leaves either the motor owner to perform ‘before’ and ‘after’ tests, the motor owner to provide test requirement specifications, or a combination of both – in which the owner performs a commissioning test upon receipt of the motor from the repair shop in an effort to Trust, but Verify.
#Motor winding equipment verification
In each case, the motor will be different from the original capability and reliability of the motor and it’s original design.įew electric motor repair shops perform ‘before’ and ‘after’ verification tests of the winding to determine if changes have occurred. Winding configuration changes may modify the electric motor’s impedance balance or change the motor’s output torque. Wire size changes will modify the motor’s I squared R losses. Many motor repair shops will adjust the original winding design, including reducing wire size or the configuration, for convenience or ease of winding. In Part 2, we will discuss why it is so important to develop and agree to a motor repair specification.
![motor winding equipment motor winding equipment](http://www.whitelegg.com/uploads/product_image/file/329/wm5000-colour300dpi-261001.jpg)
In Part 1, we discussed repair vs replace and the vendor selection process.