What faults are easy to occur in the core components of magnetic levitation blower?

The magnetic suspension blower is really easy to break down, and it will stop when it breaks down, focusing on five core components. I'll tell you clearly according to the failure rate from high to low, with typical failure phenomena, and you can check the number at the scene.

1. Magnetic Bearing (the core, the most expensive and the most faults)

Fault type:

Unstable suspension, unable to float.

Sensor drift, abnormal gap

Performance: "Bearing failure" and "Rotor not suspended" are reported at startup.

Large vibration, abnormal sound and impact of protective bearing.

Abnormal bearing control algorithm

Sudden load change and surge impact

Bearing coil overheating, short circuit

Poor cooling, dust entry and humid environment.

Abnormal shaft drop due to power failure

The standby power supply (UPS/capacitor) failed and the rotor made a hard landing.

* * Consequence: * * Light alarm stops, but heavy impeller and protective bearing are scrapped.

Second, the displacement sensor-speed sensor (high-frequency wearing parts)

Fault type:

Signal loss, reading jitter

Loose wiring, water ingress and poor shielding.

Dust and oil stain on sensor probe

Directly lead to suspension out of control.

Sensor is damaged or aging.

Performance: Random reporting of "position failure" and "overspeed"

* * Features: * * Small parts, big problems, and a broken whole machine.

Third, high-speed permanent magnet synchronous motor

Fault type:

Motor overheating trip

The cooling air duct is blocked and the water cooling flow is insufficient.

Permanent magnet demagnetization

Long-term high temperature and frequent overload

Consequences: decreased efficiency, increased current and weakness.

Winding insulation drops, short circuit

Humidity, dust, corrosive gas

Loose fit between impeller and motor shaft

Increased vibration, abnormal sound, and dynamic balance failure.

Four, frequency converter (high-speed special driver)

Fault type:

Over-current, overload and OC alarm

Motor short circuit, abnormal cable, IGBT aging

Overheating shutdown

The cooling fan is broken, the filter screen is blocked and the ambient temperature is high.

Abnormal bus voltage

Power grid fluctuation and capacitor aging

Communication interruption, control panel failure

Humidity, lightning, interference

* * Features: * * The life of electronic components is limited, and problems usually start in 8-12 years.

V. Control system (PLC/main control board)

Fault type:

Crash, black screen, restart

Unstable switching power supply, abnormal 24V

Parameter loss, program disorder

Communication failure (Modbus/TCP)

Poor grounding and strong interference

UPS/standby power supply is damaged

Directly lead to a hard landing of the rotor during power failure.

Six, impeller (three-dimensional flow impeller)

Fault type:

Dust accumulation leads to poor dynamic balance → large vibration.

Corrosion, erosion, blade defect

Scraping of impeller and shell

Fatigue crack (rare but dangerous)

VII. Summary: The most easily broken order (real ranking of engineering site)

Sensor (displacement/speed) → Maximum engine speed

Abnormal control and unstable suspension of magnetic bearing.

Inverter overheating/overcurrent

Failure of cooling system leads to high temperature of motor/bearing.

UPS/standby power failure

Impeller dust accumulation vibration is large.

Eight, the simplest judgment formula

Report bearing failure as soon as it is opened → sensor or magnetic shaft problem.

When running for a while, the vibration is large → the impeller is dusty or dynamic balance.

Jump when the temperature is high → the cooling system is blocked.

Overcurrent on loading → Frequency converter or motor problem.

Power cut directly with a thud → UPS/standby power supply is broken.