公开(公告)号：US20040027842A1

公开(公告)日：2004-02-12

申请号：US10452921

申请日：2003-06-03

Applicant: OMRON CORPORATION

Inventor： Katsutaka Tanabe ,  Nobuyuki Toyoura ,  Seiji Oka ,  Masao Mabuchi ,  Kotaro Nakamura ,  Yuji Tsurukawa ,  Kenichi Inoue

IPC: H02M007/538

CPC classification number: H02M3/3372 ,  H02M2007/4803

Abstract: An electric power conversion device comprises switching elements 2a, 2b making up a push-pull converter, a pulse transformer T, a rectification diode D1, a rectification diode D2, a choke coil L, a smoothing capacitor C, a DC magnetic deviation prevention means 3, and an inverter 4. The DC magnetic deviation prevention means 3 detects the coil currents I1, I2 flowing in the primary windings M1, M2 of the pulse transformer T. By controlling (shortening) the on time of the switching element having a greater amount of current, the coil currents I1, I2 are balanced (I1nullI2), thereby preventing the magnetic deviation phenomena of the pulse transformer T.

Abstract translation: 电力转换装置包括组成推挽转换器的开关元件2a，2b，脉冲变压器T，整流二极管D1，整流二极管D2，扼流线圈L，平滑电容器C，直流磁偏移防止装置 DC磁偏移防止装置3检测在脉冲变压器T的初级绕组M1，M2中流动的线圈电流I1，I2。通过控制（缩短）具有较大的开关元件的导通时间 电流量，线圈电流I1，I2平衡（I1 = I2），从而防止脉冲变压器T的磁偏差现象。