公开(公告)号：WO1982003142A1

公开(公告)日：1982-09-16

申请号：PCT/US1982000295

申请日：1982-03-08

Applicant: NCR CORP

Inventor： NCR CORP ,  VOYER JOSEPH L

IPC: H02P13/22

CPC classification number: H02M3/3378

Abstract: A regulated power supply includes switching transistor (36) for alternately driving the two halves of an input winding (42) of an output transformer (44), and an output circuit (52) connected to an output winding (46) of the transformer. A digital controller (10) generates pulse-width modulated control signals for controlling the duty cycles of the switching transistors in order to regulate the output voltage of the power supply. In order to correct for an imbalance condition in the transformer, the controller generates digital signals when the magnetizing current of the transformer reaches a threshold value, these signals serving to alter momentarily the pulse-width modulated control signals so as to set magnetizing current to a level in a sense opposite to the sense of the threshold value. Since the controller is digital in construction, integrated circuit chips may be used so that the power supply is of simple construction and of low cost.

Abstract translation: 调节电源包括用于交替驱动输出变压器（44）的输入绕组（42）的两半的开关晶体管（36）和连接到变压器的输出绕组（46）的输出电路（52）。 数字控制器（10）产生用于控制开关晶体管的占空比的脉冲宽度调制控制信号，以调节电源的输出电压。 为了校正变压器的不平衡状况，当变压器的励磁电流达到阈值时，控制器产生数字信号，这些信号用于瞬时改变脉宽调制控制信号，以便将磁化电流设定为 在与阈值的感觉相反的意义上。 由于控制器是数字化的，所以可以使用集成电路芯片，使电源结构简单，成本低廉。

公开(公告)号：EP0073825A4

公开(公告)日：1984-07-24

申请号：EP82901229

申请日：1982-03-08

Applicant: NCR CORP

Inventor： VOYER JOSEPH L

IPC: G05F1/10 ,  H02M3/337 ,  H02P13/22

CPC classification number: H02M3/3378

Abstract: A regulated power supply includes switching transistor (36) for alternately driving the two halves of an input winding (42) of an output transformer (44), and an output circuit (52) connected to an output winding (46) of the transformer. A digital controller (10) generates pulse-width modulated control signals for controlling the duty cycles of the switching transistors in order to regulate the output voltage of the power supply. In order to correct for an imbalance condition in the transformer, the controller generates digital signals when the magnetizing current of the transformer reaches a threshold value, these signals serving to alter momentarily the pulse-width modulated control signals so as to set magnetizing current to a level in a sense opposite to the sense of the threshold value. Since the controller is digital in construction, integrated circuit chips may be used so that the power supply is of simple construction and of low cost.