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Compact Chokes For Drive Technology Applications

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SMP Sintermetalle Prometheus GmbH & Co KG (SMP), German manufacturer of inductive components and soft-magnetic materials, presents chokes for frequency converters and other drive technology applications at this year’s PCIM Europe. The compact, low-loss chokes have a space-efficient design and good EMC characteristics.

Frequency converters have installed the chokes both at the input, where they provide power recovery, and at the converter's output, where they act as filter chokes. Because of their space-saving design and low-noise operation, SMP's chokes are also used in frequency converters' internal DC links, as both single and common-mode chokes. The components' cores consist of powder composites with low magnetostriction, which SMP specifically engineers for each application. With their low eddy current and hysteresis losses, the materials contribute to the components' exceptional efficiency. Their encapsulated design ensures that the components emit only low-intensity stray fields - another requirement in frequency converters - which allows other components to be placed in close proximity to the choke without running a risk of magnetic interaction with the choke. With their compact design, SMP's chokes occupy 25 percent less space than conventional components.

In addition to drive technology, chokes from SMP are used in industrial applications in power electronics, automation and signal processing, in railway technology, electromobility, maritime and medical engineering, for renewable energies as well as for conventional energies, and in the aerospace industry. The components are designed for currents up to 3000 A and frequencies up to 500 kHz, in special applications even up to 2 MHz. SMP uses powder composite materials that have been developed and manufactured entirely in-house and feature lower eddy current and magnetic reversal losses. The materials have a high saturation induction of up to 2 Tesla. The components can be manufactured with dimensions ranging from 19 mm to 300 mm, weighing from 0.05 kg to 130 kg, and up to temperature class H (up to 180°C). Depending on the application, protection classes up to IP66 are available. All components are RoHS and REACH compliant and CE and EAC certified, and the materials used are UL-listed.


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