---
title: "Drive magnet assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DRIVE_MAGNET_ASSEMBLY"
  data_integrity_hash: "6a45c397a828d8a2fa49203ae52f89ee"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:DRIVE_MAGNET_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-magnet-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drive-magnet-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-1.5 T (Tesla) magnetic flux density, 20-150°C operating temperature, 0-6000 RPM rotational speed"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 400
    unit: "°C"
    consequence: "Thermal demagnetization at Curie temperature, coercivity degradation due to eddy current heating (Joule heating: P = I²R), magnetic domain realignment under reverse magnetic fields exceeding intrinsic coercivity (Hci)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Eddy current induction from high-frequency magnetic field variations (Faraday's Law: ε = -dΦ/dt)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laminated rare-earth magnet construction with electrical insulation layers, active cooling channels integrated into magnet carrier"
  - node_2:
      trigger: "Mechanical stress concentration exceeding yield strength of magnet material (typically 80-120 MPa for sintered NdFeB)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Finite element analysis-optimized magnet geometry with stress-relief features, epoxy encapsulation with 60-70 Shore D hardness"
bom_nodes:
  magnet-segments:
    type: "component"
    urn: "URN:CNFX:ME:MAGNET_SEGMENTS"
    interface_type: "physical-logic-coupled"
  rotor-back-iron:
    type: "component"
    urn: "URN:CNFX:ME:ROTOR_BACK_IRON"
    interface_type: "physical-logic-coupled"
  mounting-hub:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_HUB"
    interface_type: "physical-logic-coupled"
  retaining-ring:
    type: "component"
    urn: "URN:CNFX:ME:RETAINING_RING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ASTM A977/A977M-07(2017) STANDARD TEST METHOD FOR MAGNETIC PROPERTIES OF HIGH-COERCIVITY PERMANENT MAGNET MATERIALS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (EU DIRECTIVE 2014/35/EU LOW VOLTAGE DIRECTIVE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-magnet-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "19fb7f632eb71ec8bf165b99aa06eb11d376a840339a1af2ccf7cd3841ecb094"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Drive magnet assembly

## 1. Technical Definition
The magnetic component within a magnetic coupling that transmits torque from the drive side to the driven side through magnetic fields.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-1.5 T (Tesla) magnetic flux density, 20-150°C operating temperature, 0-6000 RPM rotational speed**. Failure boundary: **Curie temperature of neodymium-iron-boron magnets (310-400°C depending on grade), coercivity drop below 800 kA/m, magnetic flux density reduction below 0.05 T**, Mechanism: **Thermal demagnetization at Curie temperature, coercivity degradation due to eddy current heating (Joule heating: P = I²R), magnetic domain realignment under reverse magnetic fields exceeding intrinsic coercivity (Hci)**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Eddy current induction from high-frequency magnetic field variations (Faraday's Law: ε = -dΦ/dt) | 8 | Temperature rise exceeding 150°C leading to thermal demagnetization | Laminated rare-earth magnet construction with electrical insulation layers, active cooling channels integrated into magnet carrier |
| Mechanical stress concentration exceeding yield strength of magnet material (typically 80-120 MPa for sintered NdFeB) | 8 | Magnet fracture creating air gaps and flux leakage | Finite element analysis-optimized magnet geometry with stress-relief features, epoxy encapsulation with 60-70 Shore D hardness |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Magnetizing System**, **Precision Assembly Fixture**, **Torque Testing Equipment**  
**Downstream Applications**: Magnetic Couplings, Magnetic Gearboxes, Sealed Pump Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the advantages of using a drive magnet assembly in machinery?
**A**: Drive magnet assemblies enable contactless torque transmission, reducing mechanical wear, eliminating lubrication needs, and providing hermetic sealing for applications requiring isolation between drive and driven components.

### Q: How do I choose between NdFeB, SmCo, and Alnico materials for my application?
**A**: NdFeB offers the highest magnetic strength for compact designs, SmCo provides excellent temperature stability and corrosion resistance, while Alnico is preferred for high-temperature applications above 300°C with good thermal stability.

### Q: What maintenance is required for drive magnet assemblies?
**A**: Drive magnet assemblies require minimal maintenance due to their contactless operation. Regular inspection for physical damage, contamination, and monitoring of temperature during operation is recommended to ensure optimal performance.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- ASTM A977/A977M-07(2017) STANDARD TEST METHOD FOR MAGNETIC PROPERTIES OF HIGH-COERCIVITY PERMANENT MAGNET MATERIALS
- CE MARKING (EU DIRECTIVE 2014/35/EU LOW VOLTAGE DIRECTIVE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Drive magnet assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drive-magnet-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DRIVE_MAGNET_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a216feb7
