公开(公告)号：US20130343092A1

公开(公告)日：2013-12-26

申请号：US13533579

申请日：2012-06-26

申请人： Yuchih Lin ,  Shao-Chung Chen

发明人： Yuchih Lin ,  Shao-Chung Chen

IPC分类号： H02M3/335 ,  H02M5/458

CPC分类号： H02M7/4807 ,  H02M2001/0022

摘要： The DC/DC converter has a full bridge circuit, a transformer and a rectifying unit. The full bridge circuit is connected to a source DC voltage. The transformer is connected to full bridge circuit and receives the source DC. The transformer has a stationary winding and at least one selectable winding connected in series. If the source DC voltage is lower than a threshold value, the switch is turned on to increase the coupling ratio of the transformer. Therefore, the transformer converts the source DC to a DC voltage in a required voltage level.

摘要翻译： DC / DC转换器具有全桥电路，变压器和整流单元。 全桥电路连接到源极直流电压。 变压器连接到全桥电路并接收源DC。 变压器具有静止绕组和串联连接的至少一个可选绕组。 如果源极直流电压低于阈值，则开关导通，以增加变压器的耦合比。 因此，变压器将源极DC转换为所需电压电平的直流电压。

公开(公告)号：US08804376B2

公开(公告)日：2014-08-12

申请号：US13533579

申请日：2012-06-26

申请人： Yuchih Lin ,  Shao-Chung Chen

发明人： Yuchih Lin ,  Shao-Chung Chen

IPC分类号： H02M3/335 ,  H02M5/458

CPC分类号： H02M7/4807 ,  H02M2001/0022

摘要： The DC/DC converter has a full bridge circuit, a transformer and a rectifying unit. The full bridge circuit is connected to a source DC voltage. The transformer is connected to full bridge circuit and receives the source DC. The transformer has a stationary winding and at least one selectable winding connected in series. If the source DC voltage is lower than a threshold value, the switch is turned on to increase the coupling ratio of the transformer. Therefore, the transformer converts the source DC to a DC voltage in a required voltage level.

摘要翻译： DC / DC转换器具有全桥电路，变压器和整流单元。 全桥电路连接到源极直流电压。 变压器连接到全桥电路并接收源DC。 变压器具有静止绕组和串联连接的至少一个可选绕组。 如果源极直流电压低于阈值，则开关导通，以增加变压器的耦合比。 因此，变压器将源极DC转换为所需电压电平的直流电压。

公开(公告)号：US20140009989A1

公开(公告)日：2014-01-09

申请号：US13541686

申请日：2012-07-04

申请人： Yu-Chih Lin ,  Shao-Chung Chen

发明人： Yu-Chih Lin ,  Shao-Chung Chen

IPC分类号： G05F1/46 ,  H02M7/537 ,  H02M7/5387

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

摘要： A switching power converter has a power converter connected between a DC power source and a load and having a power switch, a current detector detecting a load current, and a PWM controller outputting a first frequency to control the switching frequency of the power switch and outputting an adjustable second frequency to adjust the switching frequency of the power switch according to the load current and a condition of judgment. The condition of judgment serves to determine if the load is a heavy or light load. In the case of light load, the second frequency is reduced to lower the switching loss of the power switch. In the case of heavy load, the second frequency is raised to reduce the ripple of the load current. Accordingly, the conversion efficiency of the switching power converter can be enhanced.

摘要翻译： 开关电源转换器具有连接在直流电源和负载之间并具有电源开关，电流检测器检测负载电流的电力转换器和输出第一频率的PWM控制器以控制电源开关的开关频率并输出 可调节的第二频率根据负载电流和判断条件调节电源开关的开关频率。 判断条件用于确定负载是重载还是轻负载。 在轻载的情况下，第二频率降低以降低电源开关的开关损耗。 在负载较重的情况下，第二频率升高以减小负载电流的纹波。 因此，可以提高开关电力转换器的转换效率。