Kohsel industrial equipment and inductive components

Industrial transformers, line chokes, and electromagnetic solenoids from Kohsel deliver dependable performance across electric drives, power conversion, and automated production machinery.

Standard EI96 and UI48 transformer series

Power and isolation transformers from Kohsel in EI96, UI48/26, and UI48/17 frame designs are engineered for enclosure mounting and PCB integration. Coils undergo vacuum impregnation with protective potting to attenuate humming and promote thermal dissipation.

Standard EI96 enclosure mounting units treated with vacuum tropical varnish
Compact UI48/17 and UI48/26 PCB transformers sealed with protective potting
High dielectric insulation withstand parameters complying with UL 5085 norms
Selection of replacement units via secondary voltage ratings and dimensions

AC drive chokes and PFC smoothing inductors

Three-phase alternating current chokes and PFC reactors from Kohsel are designed to smooth current ripple within frequency inverters. Gapped silicon steel laminated cores and flat copper foil windings maintain stable inductive performance under harsh industrial overloads.

Three-phase AC line chokes engineered with gapped laminated steel C-core stacks
Power factor correction PFC chokes constructed with wide copper foil conductors
Suppression of harmonic currents and attenuation of inverter peak pulse surges
Selection of reactors by rated continuous current and nominal inductance bounds

High-frequency ferrite inductive components

Pulse transformers and chokes from Kohsel built on RM10, ETD29, and ETD49 ferrite geometries are engineered for switch-mode power supplies and LLC resonant converters. Multi-strand litz wire configurations minimize high-frequency skin effect losses across converters.

Resonant LLC converter transformers built on ETD49 dual-chamber bobbin frames
High-frequency inductors for LED driver circuits based on modular RM10 shapes
Winding technology utilizing high-frequency litz wire and triple-insulated wire
Selection of pulse transformers by power topology and operating frequency bounds

RFI filters and common-mode suppression chokes

Common-mode chokes and RFI filtering components from Kohsel utilizing nanocrystalline toroidal R45 cores deliver exceptional attenuation of conducted electromagnetic emissions. Modules are assembled on specialized sockets for integration into power converter filter networks.

Three-phase RFI chokes built on nanocrystalline R45 toroidal geometry rings
Symmetrical common-mode chokes for clean power conditioning and ripple filtering
Interference suppression coils engineered for radio frequency noise dampening
Selection of filtering chokes by rated line current and high attenuation band

Precision current-measurement transformers

Current-measurement transformers from Kohsel featuring grain-oriented silicon steel cores alloyed with nickel deliver high linearity across wide dynamic ranges. Units are integrated into precision feedback loops, protective monitoring panels, and automation architectures.

Current transformers using grain-oriented silicon steel alloyed with pure nickel
Broad linear frequency response for dynamic waveform and continuous load control
Waveform reproduction without magnetic core saturation during dynamic peak loads
Selection of monitoring transformers by primary rating and ratio accuracy bounds

Electromagnetic solenoids and vibratory feeder magnets

Kohsel electromagnetic actuator solenoids designed for fluid and gas valve control deliver rapid linear plunger translation. Since 1980, corrosion-protected AC magnets have served as dependable oscillating drive units in vibratory conveyors and multi-head weighers.

Linear electromagnetic solenoids for direct-acting and pilot-operated gas valves
Integrated shading rings preventing vibration hum in AC actuator coil assemblies
Corrosion-protected AC drive magnets engineered for heavy vibratory feeder units
Selection of solenoids via operating voltage ratings and linear plunger stroke

Design characteristics and vacuum impregnation of Kohsel EI and UI transformers

Standard EI96 and UI48 series transformers from Kohsel are built for continuous duty inside industrial control cabinets and automation printed circuit boards. Magnetic cores are constructed from precision-laminated electrical silicon steel sheets designed for low core excitation losses.

Coils are wound using high-thermal-index enamelled copper magnet wire and undergo deep vacuum impregnation with polymerizing insulating varnish.

This process eliminates microscopic air voids within the inter-winding insulation, preventing acoustic hum and mechanical vibration during line voltage fluctuations. Units for outdoor environments feature tropicalized protective coatings.

Integration of line and motor chokes in frequency-controlled AC drive converters

Three-phase line chokes and DC link smoothing inductors from Kohsel have served as foundational components for AC variable-speed drives for over 15 years.

Line reactor assemblies utilize gapped laminated silicon steel C-core geometries with precision gaps, preventing magnetic saturation during high motor inrush transients.

Broad copper foil windings ensure low electrical resistance and efficient heat dissipation from internal coil layers to ambient air. Installing Kohsel input chokes attenuates line harmonics, smooths commutation voltage notches, and protects power rectifier bridge diodes.

RM10 modular ferrite components and resonant LLC transformers of the ETD range

High-frequency transformers and inductors built on RM10, ETD29, and ETD49 ferrite geometries are engineered for modern switch-mode power units and high-efficiency LLC resonant converters.

In resonant converter topologies, stability of leakage inductance is critical as it functions as the resonant inductor element.

Kohsel engineers utilize a dual-chamber bobbin arrangement separating primary and secondary circuits, delivering the required leakage profile without external discrete inductors.

Multi-strand high-frequency litz wire eliminates skin effect and proximity losses at high pulse-width modulation frequencies.

Electromagnetic noise attenuation using nanocrystalline RFI common-mode chokes

To satisfy stringent electromagnetic compatibility standards for conducted radio interference, Kohsel manufactures common-mode filter chokes using nanocrystalline toroidal R45 cores.

Nanocrystalline alloys combine high initial permeability with a stable hysteresis loop across wide temperature ranges, yielding high insertion loss within compact dimensions.

Symmetrical two-line or three-phase windings ensure magnetic flux cancellation from operating currents, avoiding core saturation while presenting high impedance to asymmetrical high-frequency common-mode noise currents.

Precision current-measurement transformers utilizing silicon steel and nickel alloys

Precision current transformers from Kohsel provide current monitoring, phase angle verification, and high-speed protection for industrial equipment.

Sensor magnetic cores utilize grain-oriented silicon steel alloyed with nickel additives, expanding dynamic linearity and reducing phase angle and amplitude measurement errors.

Transformers maintain proportional signal reproduction even when monitoring distorted load currents containing high harmonic content. Polymeric encapsulation within a rigid thermoplastic shell ensures electrical isolation conforming to UL 5085 requirements.

Electromagnetic actuator solenoids and corrosion-protected vibratory feeder units

Electromagnetic solenoids from Kohsel are designed for actuator mechanisms regulating the flow of liquid and gaseous media in industrial valve assemblies. The solenoid incorporates a movable ferromagnetic plunger transmitting direct linear motion to the valve stem upon coil energization.

An integrated copper shading ring shields part of the magnetic flux at the pole face, shifting its phase to eliminate mechanical vibration and hum in AC operation.

Since 1980, Kohsel has produced corrosion-protected AC magnets providing dependable oscillating drive power for vibratory feeder units in multi-head weighers.

Kohsel and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Kohsel and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.