PULSE TRANSFORMERS:

To drive

high frequency IGBT, Mosfets, Transistors, SCR...

Toroidal Core EE Core

Turns ratio Standard (1:1, 1:1:1) Standard (1:1, 1:1:1)or Custom or Custom

Frequency 1 kHz - 10 kHz 1 kHz - 200 kHz

Driving currents up to 2 A/µs up to 1 A/µs

Dimensions from 17x17x13 mmReference our complete catalogue C15 our complete catalogue C15, C17

Toroidal Current Transformer EE Current Transformer with central hole for primary wire for PCB direct mounting

Turns ratio Standard (1:100, 1:200) Standard (1:100, 1:200)or Custom or Custom

Frequency 1 kHz - 200 kHz 1 kHz - 100 kHz

Primary currents up to 100 Aps up to 70 Arms

Dimensions from 19x9x20 mm from 17x17x13 mm

Reference our complete catalogue C18 our complete catalogue C18

CURRENT SENSE TRANSFORMERS:

To protect

high frequency Switching Devices: IGBT, Mosfets...

Flyback, Forward, Push-pull applications

Power 10 W 20 W 50 W 70 W

Ferrite core EE 16 EE 20 ETD 29 ETD 39

Number of windings max 4 max 5 max 6 max 7

Reference our complete catalogue C20

SWITCHED MODE LOW POWER TRANSFORMERS:

To supply

all the inside electronic circuits.

High power transformers range

Topology Forward, Half Bridge, Full Bridge

Power 1 kW - 10 kW

Secondary currents 100A - 300A

Frequency 20 kHz - 120 kHz

Ferrite core from EE42 to EE80 (single or multiple cores)

Reference please ask for data sheets

SWITCHED MODE HIGH POWER TRANSFORMERS:

To convert

power from main to low voltages and high currents.

INDUCTORS:

To reduce

the high frequency ripple in the output currents.

Custom design

ELECTROMAGNETIC SIMULATION

Electromagnetic Simulation:the first step to optimize power transformer and inductor design

What is possible to doWith a dedicated software tool by using finite element method we are able to:

• view space distribution of electromagneticfields and quantities: flux lines, magnetic field(see fig. 1), induction (see fig. 2), energy...

• know current distribution in every conductor(see fig. 3);

• insert an external circuit beforeand after the transformer/inductor(e.g.: forward, half-bridge, full-bridge topology, pfc…) and to useany input waveform;

• calculate in time domain windinglosses (joule and eddy current losses taking intoaccount skin and proximity effects) and core losses(see fig. 4);

• evaluate maximal internal temperature to help customers inthermal management (see fig. 5).

Why simulation?�� Power transformer losses are very important mainly in high frequency/high

power transformers and inductors where winding current is high.�� Simulation allows the choice from very different models of transformers/ induc-

tors in shape, windings type, materials…�� It is possibile to meet customer’s specifications and to choose the best trans-

former related to the customer’s circuit.�� Optimization of the transformer/inductor means lower power losses and smaller

dimensions.�� Virtual prototyping decreases design time and project costs.

Fig. 1

Fig. 2

Fig. 3

Fig. 4Fig. 5

SIRIO ELETTRONICA s.r.l.Via Selve, 235037 TEOLO (Padova)ITALY

Phone: 0039 049 9901090Fax: 0039 049 9901868

E-mail:postoffice@sirioelettronica.comwww.sirioelettronica.com S0

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