---
title: "Torque Motor"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TORQUE_MOTOR"
  data_integrity_hash: "328e140e2f44eff015d06178f4a228b5"
  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:TORQUE_MOTOR"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/torque-motor.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/torque-motor"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-150 N·m continuous torque, 0.01-0.5° angular positioning accuracy"
    unit: "N·m/A"
engineering_limits:
  max_safe_operating_point:
    value: 180
    unit: "°C"
    consequence: "Curie temperature demagnetization of neodymium-iron-boron permanent magnets at 310-400°C, causing irreversible magnetic flux loss"
fmea_matrix_quantitative:
  - node_1:
      trigger: "PWM switching frequency exceeding 20 kHz causing eddy current heating in rotor laminations"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement 0.35 mm silicon steel laminations with 3% silicon content to reduce eddy currents by 60%"
  - node_2:
      trigger: "Cogging torque harmonics at 6N±1 poles/slots (N=integer) due to magnetic saliency"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Skew stator slots by 1.5 slot pitches and implement 12-bit absolute encoder with 0.088° resolution"
bom_nodes:
  armature:
    type: "component"
    urn: "URN:CNFX:ME:ARMATURE"
    interface_type: "physical-logic-coupled"
  coil-assembly:
    type: "part"
    urn: "URN:CNFX:ME:COIL_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  permanent-magnets:
    type: "component"
    urn: "URN:CNFX:ME:PERMANENT_MAGNETS"
    interface_type: "physical-logic-coupled"
  bearings:
    type: "part"
    urn: "URN:CNFX:ME:BEARINGS"
    interface_type: "physical-logic-coupled"
  housing:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS IN A CONSTANT RIGID STATE)"
    scope: "Verified Engineering Specification"
  - standard: "IEC 60034-1:2022 (ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE)"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 60034-1:2018 (ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/torque-motor.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "6c360cccfcdc55d1ed761c0c557d107106629e46b50ca7411192a33f85d3a463"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Torque Motor

## 1. Technical Definition
An electromagnetic actuator that converts electrical signals into precise rotational torque for positioning control.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-150 N·m continuous torque, 0.01-0.5° angular positioning accuracy**. Failure boundary: **Exceeding 180°C winding temperature or 200% rated torque for &gt;100 ms**, Mechanism: **Curie temperature demagnetization of neodymium-iron-boron permanent magnets at 310-400°C, causing irreversible magnetic flux loss**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| PWM switching frequency exceeding 20 kHz causing eddy current heating in rotor laminations | 8 | Core temperature rise to 120°C, increasing winding resistance by 45% (copper loss P=I²R) | Implement 0.35 mm silicon steel laminations with 3% silicon content to reduce eddy currents by 60% |
| Cogging torque harmonics at 6N±1 poles/slots (N=integer) due to magnetic saliency | 8 | Positioning error accumulation exceeding ±0.05° during low-speed (&lt;10 rpm) operation | Skew stator slots by 1.5 slot pitches and implement 12-bit absolute encoder with 0.088° resolution |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | N·m/A | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Coil assembly](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/coil-assembly.md) `(Standalone System)`
- [Bearings](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bearings.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Servo Drive Controller**, **Cooling System**, **Position Feedback Encoder**  
**Downstream Applications**: CNC Machine Tools, Industrial Robots, Packaging Machinery  

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

### Q: What are the main advantages of torque motors in machinery manufacturing?
**A**: Torque motors provide direct drive capabilities, eliminating mechanical transmission components like gears and couplings. This results in higher precision, reduced maintenance, zero backlash, and improved dynamic response for positioning applications in machinery manufacturing.

### Q: How do permanent magnets affect torque motor performance?
**A**: Permanent magnets (typically neodymium or samarium-cobalt) create a constant magnetic field that interacts with the electromagnetic field from copper windings. This design provides high torque density, excellent efficiency, and precise control without requiring external excitation, making them ideal for servo applications.

### Q: What maintenance is required for industrial torque motors?
**A**: Torque motors require minimal maintenance due to their brushless design. Primary maintenance involves periodic bearing lubrication or replacement, checking electrical connections, and ensuring proper cooling. The sealed housing protects internal components from contaminants in industrial environments.

## 6. Manufacturing Compliance
- ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS IN A CONSTANT RIGID STATE)
- IEC 60034-1:2022 (ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE)
- DIN EN 60034-1:2018 (ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Torque Motor](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/torque-motor)**

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

> **Reference ID**: TORQUE_MOTOR | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0f48d292
