Magnet Array for Mover/Forcer Systems

Product Specifications

Technical details and manufacturing context for Magnet Array

Definition

A magnet array is a critical component within Mover/Forcer systems, consisting of multiple permanent magnets arranged in a specific geometric pattern (e.g., Halbach array). Its primary role is to create a strong, spatially varying magnetic field that interacts with the electromagnetic coils in the stator to produce precise linear or rotational forces, enabling controlled motion in industrial automation, precision positioning, and material handling equipment. The array is typically constructed from high-performance magnet materials such as Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), or Ferrite, selected based on application requirements for magnetic strength, temperature stability, and cost. Key parameters include magnet material grade (e.g., N42SH for high-temperature stability), number of poles (8–32), physical dimensions (length 50–300 mm, width 20–100 mm, height 5–30 mm), surface magnetic field (0.5–1.2 T), magnetic flux density (1.2–1.4 T), operating temperature range (-40 to 150°C), tolerance (±0.05 mm on critical dimensions, per ISO 2768-m), weight (0.5–5 kg), coercivity (≥875 kA/m for N42SH), and maximum energy product (318–342 kJ/m³ for N42SH). These values are reference ranges and must be verified with the manufacturer for specific models. The magnet array is a component, not a standalone product, and its performance is highly dependent on integration with the stator and control system. When selecting a magnet array, engineers must consider the required force profile, motion smoothness, thermal environment, and mechanical constraints. Verification of model-specific specifications and compliance with applicable standards should be conducted with the legal manufacturer or supplier.

Working Principle

The magnet array operates by establishing a periodic magnetic field. When current flows through the electromagnetic coils of the stator, the interaction between the coil's magnetic field and the permanent magnet's field generates a Lorentz force. The specific arrangement of the magnets (polarity, spacing, orientation) shapes the magnetic field to optimize force density, reduce cogging, and improve motion smoothness and efficiency in the Mover/Forcer assembly.

Common Materials

Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), Ferrite

Technical Parameters

Parameter	Typical range	Notes & selection driver
Magnet Material	N42SH	Grade N42SH for high temperature stability
Number of Poles	8–32	Determines resolution and torque
Magnet Length	50–300 mm	Custom lengths available
Magnet Width	20–100 mm	Affects footprint
Magnet Height	5–30 mm	Influences magnetic field strength
Surface Magnetic Field	0.5–1.2 T	Peak field at pole center
Magnetic Flux Density	1.2–1.4 T	Remanence of magnet material
Operating Temperature	-40–150 °C	Above 150°C demagnetization risk
Tolerance	±0.05 mm	On critical dimensionsISO 2768-m
Weight	0.5–5 kg	Depends on size and material
Coercivity	≥ 875 kA/m	Intrinsic coercivity for N42SH
Max Energy Product	318–342 kJ/m³	For N42SH grade

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

Components / BOM

Permanent Magnet Block Part
Individual magnet unit that provides the magnetic field source; typically rectangular or arc-shaped.

Material: Rare-earth magnet (e.g., NdFeB)
Mounting Plate/Backing Part
Structural base to which individual magnets are securely attached, ensuring precise alignment and mechanical integrity.

Material: Mild steel or aluminum
Adhesive/Epoxy Part
Bonds magnets to the mounting plate, providing mechanical fixation and sometimes thermal conduction.

Material: High-strength epoxy resin
Protective Coating Part
Thin layer (e.g., nickel, epoxy) applied to magnet surfaces to prevent corrosion and physical damage.

Material: Nickel plating or epoxy coating

Applied To / Applications

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

Mover/Forcer

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Mover

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Manufacturers of Magnet Array

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Frequently Asked Questions

What is a magnet array used for?

A magnet array is used in Mover/Forcer systems to generate a controlled magnetic field that interacts with stator coils to produce precise linear or rotational motion. It is a key component in industrial automation, precision positioning, and material handling equipment.

What materials are commonly used for magnet arrays?

Common materials include Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), and Ferrite. The choice depends on required magnetic strength, temperature stability, and cost. For example, NdFeB grade N42SH offers high temperature stability.

What parameters should be considered when selecting a magnet array?

Key parameters include magnet material grade, number of poles, dimensions (length, width, height), surface magnetic field, magnetic flux density, operating temperature range, tolerance, weight, coercivity, and maximum energy product. These values must be verified with the manufacturer for the specific application.

How does the arrangement of magnets affect performance?

The arrangement, such as polarity, spacing, and orientation, shapes the magnetic field to optimize force density, reduce cogging, and improve motion smoothness and efficiency. A Halbach array is one example of a specific geometric pattern that enhances field strength on one side.

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pressure:	Atmospheric to 10 bar
other spec:	Max magnetic field strength: 1.2 Tesla, Vibration tolerance: 5g RMS
temperature:	-40°C to 150°C

Magnet Array

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards