Magnetic Circuit: Reluctance < 0.5 H^-1, Flux Density 1.2-1.8 T

Q: What is the primary function of a magnetic circuit in a torque motor?

To efficiently channel and concentrate magnetic flux, converting electrical energy into mechanical torque with minimal losses, enabling precise and responsive motion control in applications like robotics and CNC machines.

Q: How does material selection impact magnetic circuit performance?

Materials with high permeability and low coercivity reduce energy losses and hysteresis, while proper lamination or composite use minimizes eddy currents, enhancing efficiency and thermal stability in dynamic operations.

Component Specifications

Definition

A magnetic circuit is a closed path formed by magnetic materials that guides and concentrates magnetic flux generated by electrical currents in coils. In torque motors and coil assemblies, it consists of permanent magnets, ferromagnetic cores, and air gaps, designed to maximize magnetic flux density and minimize reluctance for efficient energy conversion from electrical to mechanical torque.

Working Principle

Operates based on Ampere's law and magnetic flux continuity, where electrical current in coils creates a magnetic field that interacts with permanent magnets or other magnetic materials. The circuit's geometry and material properties determine flux distribution, generating torque through Lorentz forces or magnetic attraction/repulsion, with efficiency dependent on minimizing magnetic leakage and hysteresis losses.

Materials

High-permeability silicon steel laminations (e.g., M19, M36 grades), neodymium-iron-boron (NdFeB) or samarium-cobalt (SmCo) permanent magnets, soft magnetic composites (SMCs), and sometimes ferrites; insulation coatings to reduce eddy currents.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Coercivity	> 800 kA/m for permanent magnets
Reluctance	< 0.5 H^-1
Flux Density	1.2-1.8 T
Air Gap Tolerance	±0.05 mm
Operating Temperature	-40°C to 150°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 21782, DIN EN 60317

Parent Products

This component is used in the following industrial products

Torque Motor / Coil Assembly

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

View Product Details

Engineering Analysis

Risks & Mitigation

Magnetic saturation leading to reduced torque
Demagnetization under high temperatures or excessive currents
Air gap variations causing flux leakage and inefficiency

FMEA Triads

Trigger: Poor material quality or incorrect lamination
Failure: Increased core losses and overheating
Mitigation: Use certified materials per ISO standards and implement quality checks during manufacturing.

Trigger: Inadequate air gap control during assembly
Failure: Flux leakage and reduced torque output
Mitigation: Apply precision machining and automated alignment systems with tolerance monitoring.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for dimensional accuracy, ±2% for magnetic properties

Test Method

Flux density measurement using gaussmeters, thermal cycling tests per IEC 60068, and hysteresis loop analysis

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Magnetic Circuit

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

XBRELE

Zhejiang, CN

ISO9001

Also makes: Power Distribution, Power Transformer, Safety Interlock and 4 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Coil & magnetic circuit assembly”
View source page ↗ xbrele.com · checked 2026-08-26

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Frequently Asked Questions

What is the primary function of a magnetic circuit in a torque motor?