公开(公告)号：EP3013507B1

公开(公告)日：2018-09-05

申请号：EP14732471.9

申请日：2014-05-01

申请人： Illinois Tool Works Inc.

发明人： MANTHE, Alan A. ,  DUNAHOO, Jason Alan ,  KNOENER, Craig Steven ,  POULOSE, Mary Divya

IPC分类号： H02M1/08 ,  H02M3/335 ,  B23K9/09 ,  B23K9/10 ,  H02M3/28

CPC分类号： B23K9/093 ,  B23K9/1043 ,  H02M1/08 ,  H02M3/285 ,  H02M3/33523

摘要： A power supply for welding, cutting and similar operations includes a dual two-switch forward converter. The converter has two inverter circuits coupled in parallel but controlled to provide output power in an interleaved fashion. To avoid “walking” of the circuits (which could result in different duty cycles and imbalance of the load sharing), control signals are determined and applied to a first of the inverter circuits, and “on” times of the first circuit is monitored, such as by augmenting a counter to determine the number of clock cycles the first circuit is “on”. The same duration is then used for commanding output from the second inverter circuit. The duty cycles of both circuits is thus ensured to be the same regardless of changes in the total output power.

公开(公告)号：EP3013507A2

公开(公告)日：2016-05-04

申请号：EP14732471.9

申请日：2014-05-01

申请人： Illinois Tool Works Inc.

发明人： MANTHE, Alan A. ,  DUNAHOO, Jason Alan ,  KNOENER, Craig Steven ,  POULOSE, Mary Divya

IPC分类号： B23K9/09 ,  B23K9/10 ,  H02M3/28

CPC分类号： B23K9/093 ,  B23K9/1043 ,  H02M1/08 ,  H02M3/285 ,  H02M3/33523

摘要： A power supply for welding, cutting and similar operations includes a dual two-switch forward converter. The converter has two inverter circuits coupled in parallel but controlled to provide output power in an interleaved fashion. To avoid “walking” of the circuits (which could result in different duty cycles and imbalance of the load sharing), control signals are determined and applied to a first of the inverter circuits, and “on” times of the first circuit is monitored, such as by augmenting a counter to determine the number of clock cycles the first circuit is “on”. The same duration is then used for commanding output from the second inverter circuit. The duty cycles of both circuits is thus ensured to be the same regardless of changes in the total output power.

摘要翻译： 用于焊接，切割和类似操作的电源包括双双开关正向转换器。 该转换器具有并联耦合的两个逆变器电路，但被控制以交错方式提供输出功率。 为了避免电路的“行走”（这可能导致不同的占空比和负载共享的不平衡），控制信号被确定并施加到第一个反相器电路，并且监视第一电路的“接通”时间， 例如通过增加计数器来确定第一电路“接通”的时钟周期数。 然后使用相同的持续时间来指令来自第二反相器电路的输出。 因此，无论总输出功率的变化如何，两个电路的占空比被确保相同。