Plain coils for PWM application

For the generation of high-intensity magnetic field either number of turns or enough great current is necessaries. To the last one we developed a special plain-coils, which can constructed on surface of printed board. If we take into account the established parameters of plain printed board coils then we get a wide range useful arrangement. Number of turns not too large, however, the applied current low on coil internal resistance, a semiconductor bridge can be produced with pulse with modulation, by help of embedded microcontroller. In this case, it is possible to produce different waveforms and waveform-fidelity feedback through the control.