公开(公告)号：US08159846B2

公开(公告)日：2012-04-17

申请号：US12499308

申请日：2009-07-08

申请人： Keita Kawabe ,  Kazuhiro Murata ,  Yoshihiro Mori ,  Naohiko Morota

发明人： Keita Kawabe ,  Kazuhiro Murata ,  Yoshihiro Mori ,  Naohiko Morota

IPC分类号： H02M7/539

CPC分类号： H02M3/33507 ,  H02M2001/0038

摘要： At the starting time and an overload time in which the output voltage of the switching power source apparatus is low, if an overcurrent state, in which the ON period of the switching device becomes short and a current not less than the current limit value of the switching device flows through the switching device, occurs, this overcurrent state is detected. The blanking period of a blanking pulse signal is made shorter than the blanking period that is obtained during steady operation, and the ON period of the switching device is made shorter. Hence, the device current flowing through the switching device can be made small in each pulse for the switching operation, and, at the same time, the device current is suppressed from increasing each time a pulse for the switching operation is generated.

摘要翻译： 在开始时刻以及开关电源装置的输出电压低的过载时间，如果开关装置的导通期间变短的电流状态和不小于开关电源装置的电流限制值的电流 开关器件流过开关器件，发生该过电流状态。 消隐脉冲信号的消隐周期短于在稳定运行期间获得的消隐周期，并且切换装置的导通周期变短。 因此，在开关动作的每个脉冲中，流过开关装置的器件电流可以变小，并且同时，每当产生用于切换操作的脉冲时，抑制器件电流增加。

公开(公告)号：US20100008106A1

公开(公告)日：2010-01-14

申请号：US12499308

申请日：2009-07-08

申请人： Keita Kawabe ,  Kazuhiro Murata ,  Yoshihiro Mori ,  Naohiko Morota

发明人： Keita Kawabe ,  Kazuhiro Murata ,  Yoshihiro Mori ,  Naohiko Morota

IPC分类号： H02M3/335 ,  H02H7/122 ,  H02M7/44

CPC分类号： H02M3/33507 ,  H02M2001/0038

摘要： At the starting time and an overload time in which the output voltage of the switching power source apparatus is low, if an overcurrent state, in which the ON period of the switching device becomes short and a current not less than the current limit value of the switching device flows through the switching device, occurs, this overcurrent state is detected. The blanking period of a blanking pulse signal is made shorter than the blanking period that is obtained during steady operation, and the ON period of the switching device is made shorter. Hence, the device current flowing through the switching device can be made small in each pulse for the switching operation, and, at the same time, the device current is suppressed from increasing each time a pulse for the switching operation is generated.

摘要翻译： 在开始时刻以及开关电源装置的输出电压低的过载时间，如果开关装置的导通期间变短的电流状态和不小于开关电源装置的电流限制值的电流 开关器件流过开关器件，发生该过电流状态。 消隐脉冲信号的消隐周期短于在稳定运行期间获得的消隐周期，并且切换装置的导通周期变短。 因此，在开关动作的每个脉冲中，流过开关装置的器件电流可以变小，并且同时，每当产生用于切换操作的脉冲时，抑制器件电流增加。

公开(公告)号：US08295062B2

公开(公告)日：2012-10-23

申请号：US12721851

申请日：2010-03-11

申请人： Keita Kawabe ,  Naohiko Morota ,  Kazuhiro Murata

发明人： Keita Kawabe ,  Naohiko Morota ,  Kazuhiro Murata

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0006

摘要： The switching power supply apparatus includes a transformer including a primary winding, a secondary winding, an auxiliary winding, a switching device connected to the primary winding, an output voltage generation circuit which is connected to the secondary winding and generates an output voltage, and an auxiliary power voltage generation circuit which is connected to the auxiliary winding and generates an auxiliary power voltage. The switching power supply apparatus also includes a control circuit, which operates using the auxiliary power voltage and controls a driver circuit so that an intermittent oscillation is performed when the output voltage is higher than a first output voltage, and which controls a peak of a current flowing through a switching device is lower than a peak in a normal mode, when the auxiliary power voltage is lower than a first auxiliary power voltage in the intermittent oscillation.

摘要翻译： 开关电源装置包括：变压器，其包括初级绕组，次级绕组，辅助绕组，连接到初级绕组的开关装置，连接到次级绕组并产生输出电压的输出电压产生电路，以及 辅助电源电压生成电路，其连接到辅助绕组并产生辅助电源电压。 开关电源装置还包括控制电路，其使用辅助电源电压进行操作并控制驱动电路，使得当输出电压高于第一输出电压时进行间歇振荡，并且控制电流的峰值 当辅助电源电压低于间歇振荡中的第一辅助电源电压时，流过开关装置的电流低于正常模式下的峰值。

公开(公告)号：US08427850B2

公开(公告)日：2013-04-23

申请号：US13020374

申请日：2011-02-03

申请人： Naohiko Morota ,  Tetsuyuki Fukushima ,  Kazuhiro Murata

发明人： Naohiko Morota ,  Tetsuyuki Fukushima ,  Kazuhiro Murata

IPC分类号： H02H7/122 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： A switching power supply device including: a power transformer including a primary winding, a secondary winding, and an auxiliary winding; a switching element which is connected to the primary winding; an output voltage generation circuit which converts, into a direct-current voltage, a voltage induced in the secondary winding; a secondary-side on-time signal generation circuit which generates a secondary-side on-time signal indicating a secondary-side on-time; and a switching control circuit which controls a switching operation of the switching element so that the second direct-current voltage falls within a specified range, wherein the switching control circuit controls the switching operation so that the direct-current voltage becomes equal to or below an overvoltage specified value when the secondary-side on-time becomes smaller than a set value.

摘要翻译： 一种开关电源装置，包括：电力变压器，包括初级绕组，次级绕组和辅助绕组; 连接到初级绕组的开关元件; 输出电压产生电路，其将二次绕组中感应的电压转换成直流电压; 次级侧导通时间信号生成电路，其生成表示二次侧接通时间的次级侧导通时间信号; 以及开关控制电路，其控制所述开关元件的开关动作使得所述第二直流电压落在规定范围内，其中所述开关控制电路控制所述开关动作，使得所述直流电压变为等于或小于 次级侧接通时间变得小于设定值时的过电压指定值。

公开(公告)号：US20090201705A1

公开(公告)日：2009-08-13

申请号：US12365436

申请日：2009-02-04

申请人： Kazuhiro Murata ,  Naohiko Morota ,  Yoshihiro Mori

发明人： Kazuhiro Murata ,  Naohiko Morota ,  Yoshihiro Mori

IPC分类号： H02H7/125

CPC分类号： H02M1/32 ,  H02M3/33523

摘要： The present invention reliably reduces output power during an overload, due to overload protection in which an on-time of a switching element 1 is reduced or the peak value of a switching current is lowered by reducing the minimum value of the on-period of the switching element 1.

摘要翻译： 由于过载保护，本发明可以有效地降低过载时的开关元件1的导通时间或者开关电流的峰值通过降低开关元件1的导通时间的最小值而导致的过载保护 开关元件1。

公开(公告)号：US20120044724A1

公开(公告)日：2012-02-23

申请号：US13265994

申请日：2010-04-09

申请人： Naohiko Morota ,  Kazuhiro Murata

发明人： Naohiko Morota ,  Kazuhiro Murata

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M1/32

摘要： A switching power supply apparatus that can precisely control the overload protection voltage is provided. The apparatus includes a secondary current on-period detection circuit for detecting the time between turn-off of the switching device and off-timing of the secondary current; and an output power limiting circuit for comparing the output signal of the secondary current on-period detection circuit with a signal indicating a predetermined maximum secondary current on-period, and for outputting an output power limiting signal for reducing or stopping power supply to a load to a switching signal control circuit when the former signal is higher than the latter signal, wherein the maximum secondary current on-period is arranged to correspond to the secondary current on-period when the device current flowing through the switching device reaches the maximum current defined by the switching signal control circuit, or the oscillation frequency of the device current reaches the maximum oscillation frequency defined by the oscillator, and the second DC voltage from the output voltage generation circuit is released from constant-voltage control and reduced.

摘要翻译： 提供了可以精确地控制过载保护电压的开关电源装置。 该装置包括：二次电流导通周期检测电路，用于检测开关装置的关断与次级电流的关断时间之间的时间; 以及输出功率限制电路，用于将次级电流导通周期检测电路的输出信号与表示预定的最大次级电流导通周期的信号进行比较，并输出用于减小或停止向负载供电的输出功率限制信号 当前一信号高于后一信号时，其中最大次级电流导通周期被布置成对应于当流过开关装置的器件电流达到限定的最大电流时的次级电流接通周期 或者由器件电流的振荡频率达到由振荡器限定的最大振荡频率，并且来自输出电压产生电路的第二直流电压从恒定电压控制中解除并减小。

公开(公告)号：US20100124081A1

公开(公告)日：2010-05-20

申请号：US12581348

申请日：2009-10-19

申请人： Naohiko Morota ,  Kazuhiro Murata

发明人： Naohiko Morota ,  Kazuhiro Murata

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： According to the present invention, when a secondary current on period T2on reaches a predetermined maximum secondary current on-period, an overload is detected and an output power is controlled to decrease. Further, a maximum secondary current on-period signal is set so as to correspond to a secondary current on-period when constant voltage control is performed on an output voltage.

摘要翻译： 根据本发明，当二次电流接通时段T2on达到预定的最大二次电流接通时间时，检测到过载并且控制输出功率降低。 此外，最大次级电流导通周期信号被设定为与对输出电压执行恒定电压控制时的次级电流接通周期相对应。

公开(公告)号：US20070253228A1

公开(公告)日：2007-11-01

申请号：US11700924

申请日：2007-02-01

申请人： Naohiko Morota ,  Kazuhiro Murata

发明人： Naohiko Morota ,  Kazuhiro Murata

IPC分类号： H02M3/335 ,  H02M7/537

CPC分类号： H02M3/335

摘要： A feedback circuit (3) generates an error amplification signal VEAO for stabilizing an output voltage Vo at the reference voltage. The reference voltage is set beforehand in the feedback circuit (3). The peak value of drain current ID passing through a switching element (1) is controlled by the error amplification signal VEAO and the output voltage Vo is stabilized. Meanwhile, when a load (132) increases, a reference voltage variable circuit (13) increases the internal reference voltage of the feedback circuit (3) based on the error amplification signal VEAO, so that fluctuations in output voltage due to load fluctuations are reduced.

摘要翻译： 反馈电路（3）产生用于稳定参考电压的输出电压Vo的误差放大信号VEAO。 在反馈电路（3）中预先设定基准电压。 通过开关元件（1）的漏极电流ID的峰值由误差放大信号VEAO控制，输出电压Vo稳定。 同时，当负载（132）增加时，参考电压可变电路（13）基于误差放大信号VEAO增加反馈电路（3）的内部参考电压，从而降低由于负载波动引起的输出电压的波动 。

公开(公告)号：US20110194314A1

公开(公告)日：2011-08-11

申请号：US13020374

申请日：2011-02-03

申请人： Naohiko MOROTA ,  Tetsuyuki Fukushima ,  Kazuhiro Murata

发明人： Naohiko MOROTA ,  Tetsuyuki Fukushima ,  Kazuhiro Murata

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： A switching power supply device including: a power transformer including a primary winding, a secondary winding, and an auxiliary winding; a switching element which is connected to the primary winding; an output voltage generation circuit which converts, into a direct-current voltage, a voltage induced in the secondary winding; a secondary-side on-time signal generation circuit which generates a secondary-side on-time signal indicating a secondary-side on-time; and a switching control circuit which controls a switching operation of the switching element so that the second direct-current voltage falls within a specified range, wherein the switching control circuit controls the switching operation so that the direct-current voltage becomes equal to or below an overvoltage specified value when the secondary-side on-time becomes smaller than a set value.

摘要翻译： 一种开关电源装置，包括：电力变压器，包括初级绕组，次级绕组和辅助绕组; 连接到初级绕组的开关元件; 输出电压产生电路，其将二次绕组中感应的电压转换成直流电压; 次级侧导通时间信号生成电路，其生成表示二次侧接通时间的次级侧导通时间信号; 以及开关控制电路，其控制所述开关元件的开关动作使得所述第二直流电压落在规定范围内，其中所述开关控制电路控制所述开关动作，使得所述直流电压变为等于或小于 次级侧接通时间变得小于设定值时的过电压指定值。

公开(公告)号：US07492615B2

公开(公告)日：2009-02-17

申请号：US11700924

申请日：2007-02-01

申请人： Naohiko Morota ,  Kazuhiro Murata

发明人： Naohiko Morota ,  Kazuhiro Murata

IPC分类号： H02M3/335 ,  H02M7/5395

CPC分类号： H02M3/335

摘要： A feedback circuit (3) generates an error amplification signal VEAO for stabilizing an output voltage Vo at the reference voltage. The reference voltage is set beforehand in the feedback circuit (3). The peak value of drain current ID passing through a switching element (1) is controlled by the error amplification signal VEAO and the output voltage Vo is stabilized. Meanwhile, when a load (132) increases, a reference voltage variable circuit (13) increases the internal reference voltage of the feedback circuit (3) based on the error amplification signal VEAO, so that fluctuations in output voltage due to load fluctuations are reduced.

摘要翻译： 反馈电路（3）产生用于稳定参考电压的输出电压Vo的误差放大信号VEAO。 在反馈电路（3）中预先设定参考电压。 通过开关元件（1）的漏极电流ID的峰值由误差放大信号VEAO控制，输出电压Vo稳定。 同时，当负载（132）增加时，参考电压可变电路（13）基于误差放大信号VEAO增加反馈电路（3）的内部参考电压，从而降低由于负载波动引起的输出电压的波动 。