MAGNETEC nanocrystalline cores and inductive components

Technological foundations of NANOPERM nanocrystalline alloy

Developed by German manufacturer MAGNETEC, the advanced soft magnetic alloy NANOPERM represents a rapid-solidified iron-based material exhibiting a characteristic grain structure around ten nanometers.

The ultra-fine crystal lattice is achieved through precision thermal treatment of amorphous ribbons within an externally controlled magnetic field.

This technique enables fine adjustment of the magnetic hysteresis loop to meet specialized customer engineering requirements, delivering square, linear, or flat magnetization curves for broad power conversion tasks.

Primary operational benefits of NANOPERM material include initial magnetic permeability reaching up to 150,000 paired with high saturation induction of 1.2 Tesla and minimal high-frequency core losses.

Toroidal cores engineered from NANOPERM sustain stable magnetic characteristics across a thermal spectrum from minus 40 to plus 120 degrees Celsius, outperforming traditional ferrite components.

CoolBlue inductive absorbers and motor bearing current mitigation

Operating high-frequency pulse-width modulated inverters and variable frequency drives in industrial installations induces parasitic capacitive currents and transient common-mode overvoltages at inverter output stages.

These high-frequency circulating currents traverse grounded structural assemblies and motor bearing rolling elements.

Micro-arcing through the lubricating oil film causes localized metal pitting, distinct EDM fluting grooves, and lubricant breakdown, resulting in severe vibration, overheating, and motor breakdown.

To prevent electrical discharge machining damage, MAGNETEC engineered the CoolBlue portfolio of nanocrystalline inductive absorbers. The toroidal rings install directly around the three motor power leads at the inverter terminal output without requiring electrical wiring revisions.

Functioning as high-frequency common-mode dampening elements, CoolBlue rings absorb parasitic current spikes, relieving motor bearings and extending machine service intervals.

Current-compensated power line EMC filtering chokes

Ensuring electromagnetic compatibility for industrial power electronics is governed by international standards, including DIN EN 60938-1. Conventional suppression filters built around ferrite cores require generous mounting space and generate high heat when exposed to dense currents.

By incorporating toroidal NANOPERM nanocrystalline cores, MAGNETEC developed compact single-phase and multi-phase current-compensated chokes delivering improved power density.

Leveraging high magnetic permeability, MAGNETEC chokes deliver strong insertion loss across frequencies spanning kilohertz to tens of megahertz while reducing component volume requirements by up to 60 percent compared to ferrite filters.

The assemblies are rated for power line voltages of 230V, 400V, and 500/600V, ensuring dependable performance for industrial controllers, switch-mode power units, and machine drives.

Optimized core geometry in Nanoperm LC and LM series

To address high-density circuit board layouts, MAGNETEC developed the Nanoperm LC series featuring square core cross-sections.

Enhanced contact geometry and an optimized winding profile decrease the copper turn length, reducing ohmic winding resistance, cutting parasitic capacitance, and curbing thermal buildup in filter units handling elevated currents.

The LC series provides an economical alternative for high-volume electrical equipment manufacturing.

For applications experiencing strong continuous DC bias and intense asymmetrical interference currents, the Nanoperm LM series offers nominal initial permeability from 1,000 to 8,000.

Unlike standard materials, LM cores resist magnetic saturation caused by DC current components, making them ideal for photovoltaic inverters, wind turbine power units, and industrial traction converters.

Cut Cores with adjustable air gaps for high-current chokes

High-power smoothing circuits, pulsed energy storage modules, and resonant power converter circuits require inductive assemblies featuring controlled non-magnetic gaps.

Specialized MAGNETEC Cut Cores are manufactured from calibrated NANOPERM nanocrystalline ribbons through precision mechanical cutting and optical surface polishing of mating joints to minimize flux fringing losses.

The two-piece split-ring architecture of rectangular or oval geometry facilitates accurate adjustment of the air gap dimension utilizing non-magnetic dielectric spacers. This arrangement ensures linear magnetization behavior under high transient currents and prevents sudden choke core saturation.

Cut Cores are widely used in welding inverters, industrial induction heating drives, and fast-charging converters.

SafeBlue precision current measuring transformers and sensors

High alternating current measurement accuracy and immediate ground-fault leakage detection represent critical requirements for protection relays, residual current devices (RCD), and automated circuit breakers.

The SafeBlue product line from MAGNETEC encompasses complete zero-sequence current transformers and sensors engineered around nanocrystalline cores exhibiting high signal transformation linearity.

Owing to the low coercivity of NANOPERM alloy, SafeBlue sensors maintain zero phase shift and thermal stability of the transformation ratio between minus 40 and plus 85 degrees Celsius.

The sensing modules detect differential leakage currents down to several milliamperes, fulfilling electrical safety standards in power distribution networks and industrial facilities.