INDUSTRY COMPONENT

Driven magnet assembly

Driven magnet assembly is the rotating component in magnetic couplings that transfers torque without physical contact through magnetic fields.

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Component Specifications

Definition
The driven magnet assembly is a critical component in magnetic coupling systems, consisting of permanent magnets arranged in a specific pattern and mounted on a rotor. It operates without mechanical contact with the driving magnet assembly, creating a hermetic seal barrier while transmitting torque through magnetic flux. This assembly is typically housed in a non-magnetic containment shell and rotates in response to the magnetic field generated by the driving magnet assembly, enabling torque transmission across sealed barriers in pumps, mixers, and other industrial equipment.
Working Principle
Operates on the principle of magnetic torque transmission through synchronized magnetic fields. When the driving magnet assembly rotates, its magnetic field induces rotation in the driven magnet assembly through magnetic attraction and repulsion forces, without any physical connection. The torque capacity depends on magnet strength, air gap distance, and magnetic circuit design.
Materials
Neodymium iron boron (NdFeB) or samarium cobalt (SmCo) permanent magnets, 316 stainless steel or titanium containment shells, aluminum or composite rotor structures, epoxy encapsulation for corrosion protection
Technical Parameters
  • IP Rating IP68 for submerged applications
  • Magnet Grade N35-N52 (NdFeB) or 2:17 (SmCo)
  • Maximum Speed 3000-10000 RPM
  • Torque Capacity 5-500 Nm
  • Air Gap Tolerance ±0.1 mm
  • Operating Temperature -40°C to 200°C
Standards
ISO 1940-1, DIN 740, IEC 60034, API 610

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Driven magnet assembly.

magnetic coupling driven magnet torque transmission non-contact drive permanent magnet assembly hermetic seal industrial magnets magnetic drive components Driven magnet assembly Driven magnet assembly in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Magnetic Coupling

A non-contact torque transmission device that uses magnetic fields to transfer motion through a barrier.

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Engineering Analysis

Risks & Mitigation
  • Magnet demagnetization due to overheating
  • Corrosion in aggressive chemical environments
  • Eddy current losses at high speeds
  • Magnetic particle contamination in cleanroom applications
  • Torque slip during overload conditions
FMEA Triads
Trigger: Excessive operating temperature beyond magnet rating
Failure: Permanent demagnetization and torque loss
Mitigation: Implement temperature monitoring systems, use high-temperature magnet grades (SmCo), and improve cooling through heat sinks or forced air circulation
Trigger: Corrosive fluid penetration into containment shell
Failure: Magnet corrosion and magnetic circuit degradation
Mitigation: Use corrosion-resistant materials (titanium, Hastelloy), apply protective coatings, and implement double containment with leak detection
Trigger: Misalignment between driving and driven assemblies
Failure: Increased vibration, reduced efficiency, and bearing wear
Mitigation: Precision alignment during installation, use flexible couplings, and implement laser alignment verification procedures

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Radial runout: ≤0.05 mm, Axial play: ≤0.1 mm, Magnetic balance: ≤5 g·mm/kg
Test Method
Torque testing via dynamometer, magnetic flux measurement with gaussmeter, rotational balance per ISO 1940-1 G2.5, hermetic seal testing per API 682, temperature cycling from -40°C to maximum rated temperature

Buyer Feedback

★★★★☆ 4.5 / 5.0 (26 reviews)

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"The technical documentation for this Driven magnet assembly is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Driven magnet assembly so far."

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Frequently Asked Questions

What is the main advantage of using a driven magnet assembly?

The primary advantage is contactless torque transmission, which eliminates mechanical wear, prevents leakage in sealed systems, and requires no lubrication, making it ideal for hazardous or sterile environments.

How does temperature affect driven magnet assembly performance?

High temperatures can cause permanent magnet demagnetization, particularly with NdFeB magnets above 80°C. SmCo magnets offer better temperature stability up to 350°C but are more expensive. Proper thermal management is critical for maintaining torque capacity.

What maintenance is required for driven magnet assemblies?

Minimal maintenance is needed due to the contactless design. Primary concerns are monitoring bearing wear in supporting structures, checking for corrosion on containment shells, and verifying magnetic strength degradation over time through periodic torque testing.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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