A half-wave pulsewidth modulation (PWM) control device based on the principle of the half-wave magnetic amplifier has interesting characteristics for controlling a high frequency switching regulator. It is called a magnetic power controller. By using magnetic power controller of an amorphous core having a highly rectangular dynamic hysteresis loop and using a self-oscillating inverter, a highly reliable 200kHz switching regulator is realized, in which the current surge caused by the reverse recovery of the diode is suppressed by the surge suppresion characteristic of the magnetic power controller. The efficiency of this switching regulator is higher than 80% for an input voltage of 110 plus or minus 20v and for an output power of 98w (5v, 10A and 24v, 2A). Peak to peak voltage of the switching nosie observed in the output voltage is as small as 10mv under the above condition. The amorphous core used is of a Co-rich system with approximately zero magnetostriction.
|Number of pages||3|
|Journal||IEEE Transactions on Magnetics|
|Publication status||Published - Nov 1982|
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
- Electronic, Optical and Magnetic Materials