Will the Magnetic Force of a Permanent Magnet Synchronous Traction Machine Fade Over Time?
In the elevator industry, the Permanent Magnet Synchronous Traction Machine has become the mainstream driving system, gradually replacing traditional asynchronous motors. Its advantages—energy efficiency, compact design, smooth operation, and long service life—make it a preferred choice in modern elevators.
However, many users often ask: Will the magnetic force of a Permanent Magnet Synchronous Traction Machine eventually disappear?
1. Does a Permanent Magnet Lose Its Magnetism?
The core component of a PMSM is the rare-earth permanent magnet. Under normal operating conditions, the magnetic force of this material remains extremely stable and does not simply “disappear.”
Key characteristics include:
High stability – Strong resistance to external magnetic interference.
Long durability – Theoretical service life can reach decades.
No excitation required – Natural magnetism ensures efficient motor performance.
Therefore, during daily elevator operation, the magnetic force of a PMSM almost never decays significantly, and sudden demagnetization is highly unlikely.
2. What Factors May Affect Magnetism?
While permanent magnets are stable, certain extreme conditions could lead to partial demagnetization:
Excessive temperature – If the motor operates beyond the magnet’s Curie temperature, magnetism may rapidly weaken.
Strong external magnetic fields – Continuous exposure to powerful magnetic environments may cause magnet loss.
Severe overload or motor faults – Abnormal currents and extreme operating conditions can impact magnetic performance.
Inferior materials – Low-quality magnets are more prone to degradation over time.
3. How to Prevent Magnetic Decay?
Choose high-quality traction machines (such as those supplied by A-FLY).
Ensure the elevator operates under proper load conditions and avoid frequent overload.
Maintain regular inspection and cooling performance of the motor.
During design and selection, match the elevator specifications with the correct motor model.
4. Conclusion
Under normal circumstances, the magnetism of a Permanent Magnet Synchronous Traction Machine will not disappear. Even after many years of service, the reduction in magnetism is minimal and does not affect elevator safety or performance.
By selecting A-FLY’s high-performance PMSM traction machines and elevator spare parts, building owners can ensure long-term stability, energy efficiency, and reliable operation of their elevator systems.
