Industry-Verified Manufacturing Data (2026)

Torque Motor / Coil Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Torque Motor / Coil Assembly used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Torque Motor / Coil Assembly is characterized by the integration of Coil Winding and Armature. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper wire construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Electromagnetic actuator assembly that converts electrical current into precise mechanical torque within an I/P converter.

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Product Specifications

Technical details and manufacturing context for Torque Motor / Coil Assembly

Definition
A critical electromechanical subassembly in I/P (current-to-pressure) converters that generates controlled rotational force through electromagnetic interaction between its coil and magnetic circuit, enabling precise pneumatic pressure regulation from electrical input signals.
Working Principle
When electrical current flows through the coil, it creates a magnetic field that interacts with permanent magnets or a magnetic circuit, producing torque on an armature or moving element. This torque is proportional to the input current and is used to position a flapper or similar mechanism that modulates pneumatic pressure.
Common Materials
Copper wire, Electrical insulation materials, Magnetic core materials (e.g., silicon steel), Structural plastics or metals
Technical Parameters
  • Torque constant - torque output per unit of input current (N·m/A) Customizable
Components / BOM
  • Coil Winding
    Generates magnetic field when energized with electrical current
    Material: Copper wire with insulation
  • Armature
    Rotating element that transmits torque to the flapper mechanism
    Material: Magnetic steel
  • Magnetic Circuit
    Provides path for magnetic flux and interacts with coil field
    Material: Soft magnetic materials (e.g., silicon steel)
  • Terminal Block
    Electrical connection interface for coil wiring
    Material: Insulating plastic with metal contacts
Engineering Reasoning
0.5-5.0 N·m at 4-20 mA input, 24 VDC supply, 25°C ambient
Coil insulation breakdown at 180°C, magnetic saturation at 1.8 T flux density, mechanical yield at 350 MPa stress
Design Rationale: Joule heating (I²R) exceeding Curie temperature (770°C for iron core), causing permanent magnetic property loss and insulation degradation
Risk Mitigation (FMEA)
Trigger Coil insulation breakdown due to dielectric strength reduction at 180°C
Mode: Inter-turn short circuit causing 85% torque output reduction
Strategy: Class H insulation (180°C rated) with thermal fuse at 165°C
Trigger Magnetic core saturation at 1.8 T flux density from 30 mA overcurrent
Mode: Non-linear torque response beyond 4.2 N·m, hysteresis loss increase to 45 W
Strategy: Current limiting circuit with 25 mA cutoff and laminated silicon steel core (0.35 mm thickness)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Torque Motor / Coil Assembly.

torque motor coil assembly for I/P converters electromagnetic actuator assembly electrical equipment precision torque motor with copper winding magnetic core torque motor assembly industrial I/P converter coil assembly

Applied To / Applications

This component is essential for the following industrial systems and equipment:

I/P Converter
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 150 psi (compatible with I/P converter standards)
other spec: Current range: 4-20 mA standard, 0-20 mA optional; Response time: <100 ms; Torque output: 0.5-5.0 Nm (model dependent)
temperature: -40°C to +85°C
Media Compatibility
✓ Clean dry air ✓ Inert gases (N2, Argon) ✓ Non-corrosive process gases
Unsuitable: Wet/condensing environments or conductive fluids (risk of coil corrosion/short circuit)
Sizing Data Required
  • Required torque output (Nm)
  • Supply current/voltage range
  • Ambient temperature and pressure conditions

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal degradation from overheating due to excessive current, poor cooling, or voltage spikes, leading to short circuits or ground faults.
Mechanical binding or seizure
Cause: Contamination ingress (e.g., dust, moisture, or metal particles) or misalignment causing increased friction, wear, and eventual lock-up of moving parts.
Maintenance Indicators
  • Audible humming, buzzing, or grinding noises during operation indicating mechanical interference or electrical arcing.
  • Visible overheating signs such as discoloration, smoke, or burning smell from the coil assembly.
Engineering Tips
  • Implement regular thermal monitoring using infrared cameras or embedded sensors to detect overheating early and adjust cooling or load conditions.
  • Ensure proper sealing and environmental controls (e.g., clean, dry air supply) to prevent contamination ingress, and perform periodic alignment checks to maintain mechanical integrity.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) IEC 60034-1 (Rotating Electrical Machines) EN 60204-1 (Safety of Machinery - Electrical Equipment)
Manufacturing Precision
  • Bore Diameter: +/-0.01mm
  • Coil Winding Resistance: +/-2% of nominal value
Quality Inspection
  • High-Potential (Hi-Pot) Dielectric Strength Test
  • Torque Constant Verification Test

Factories Producing Torque Motor / Coil Assembly

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

T Technical Director from Australia Feb 11, 2026
★★★★★
"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Torque Motor / Coil Assembly so far."
Technical Specifications Verified
P Project Engineer from Singapore Feb 08, 2026
★★★★☆
"Testing the Torque Motor / Coil Assembly now; the technical reliability results are within 1% of the laboratory datasheet. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Germany Feb 05, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

16 sourcing managers are analyzing this specification now. Last inquiry for Torque Motor / Coil Assembly from Mexico (1h ago).

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Frequently Asked Questions

What is the primary function of this torque motor/coil assembly?

This electromagnetic actuator assembly converts electrical current into precise mechanical torque within I/P (current-to-pressure) converters, enabling accurate control in industrial automation systems.

What materials are used in the construction of this assembly?

The assembly utilizes copper wire for windings, electrical insulation materials, magnetic core materials like silicon steel for efficient flux paths, and structural plastics or metals for durability and stability.

How does this torque motor assembly ensure reliable performance in electrical equipment?

With components like the coil winding, armature, magnetic circuit, and terminal block, it delivers consistent torque output, minimal hysteresis, and robust operation in demanding industrial environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Electrical Equipment Manufacturing sector.

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