Rotor remanufacturing is a more complex service that we provide to partners and customers around the world. Typically, a rotor is damaged by foreign matter (impurities) in the wrong place, or simply by time and stress, the underlying materials can no longer withstand the rotational speed.
Magnetic field mapping
When the rotor is accepted, we first carry out a magnetic field mapping and assess the damage to the magnetic field (for this we have developed the our own magnetic field mapping device:
- use the device to create a magnetic field map,
- locate the fault (usually a damaged magnet or several magnets), which is visible as a graphical anomaly on the displayed magnetic field map.
Mapping is part of the standard service procedure, which in many cases avoids unnecessary service costs. It is often difficult to visually assess what is wrong with the engine, especially if it works, but does not give 100% of its power. Without prior mapping, every service would start solving the problem by dismantling the entire engine and identifying deviations from the factory ones. However, during assembly and testing, we usually find that the engine still does not work (despite a complete rebuild, replacement of bearings, etc.). We already have the cost of the service, but the error is still not resolved. Usually, only at this stage do we continue to search for the problem.
Disassembling the rotor
- Remove the bandage,
- remove the magnets,
- clean the surface.
If the magnets are damaged, we will make new ones. We draw up a plan with precise dimensions and take into account all the necessary parameters (magnetic field strength). Once the magnets are made, the next step is to proceed.
Reassembly
- Make new magnets, magnetise them and stick them to the surface,
- the magnets are protected and wrapped in a bandage,
- the rotor is balanced.
Once the rotor is assembled, we insert it into the stator and assemble the motor. This is followed by output testing and a service report.
If the rotor is already too damaged to be worth restoring, we manufacture a completely new one with exactly the same parameters as the original.