公开(公告)号：US20150155792A1

公开(公告)日：2015-06-04

申请号：US14618482

申请日：2015-02-10

Applicant: FUJITSU LIMITED

Inventor： Yu YONEZAWA ,  Yoshiyasu NAKASHIMA

IPC: H02M3/335

CPC classification number: H02M3/33546 ,  H02M3/33592 ,  H02M3/3376 ,  Y02B70/1475

Abstract: First FET switches control supply of electricity from an external power supply to a primary winding of a transformer. A condenser is connected, in series, to a secondary winding of the transformer. A second FET switch is connected, in parallel, to the secondary winding and the condenser. The diode is connected, in parallel, to the second FET switch. A switch control unit acquires a value obtained by measuring a current flowing through the first FET switches and the second FET switch and controls, on the basis of the measurement result of the current, conduction of the first FET switches and the second FET switch.

Abstract translation: 第一个FET开关控制从外部电源向变压器的初级绕组供电。 电容器串联连接到变压器的次级绕组。 第二个FET开关并联连接到次级绕组和冷凝器。 二极管并联连接到第二个FET开关。 开关控制单元获取通过测量流过第一FET开关和第二FET开关的电流获得的值，并且基于电流的测量结果控制第一FET开关和第二FET开关的导通。

公开(公告)号：US20150302972A1

公开(公告)日：2015-10-22

申请号：US14661717

申请日：2015-03-18

Applicant: FUJITSU LIMITED

Inventor： Yu YONEZAWA ,  Hiroshi NAKAO ,  Yoshiyasu NAKASHIMA

IPC: H01F27/28 ,  H02M3/335

CPC classification number: H01F27/2804 ,  H01F2027/2809 ,  H01F2027/2819 ,  H02M3/28

Abstract: A planar type transformer includes: a multilayer substrate including a primary main winding pattern and a secondary main winding pattern that perform first power transmission, the primary main winding pattern and the secondary main winding pattern being stacked with an insulating layer interposed between the primary main winding pattern and the secondary main winding pattern; and an auxiliary winding that is disposed outside the multilayer substrate and performs second power transmission between the auxiliary winding and the primary main winding pattern or the secondary main winding pattern.

Abstract translation: 平面型变压器包括：多层衬底，其包括执行第一电力传输的初级主绕组图案和次级主绕组图案，主要主绕组图案和次级主绕组图案被堆叠在绝缘层之间，该绝缘层插入在主要主绕组 图案和次级主绕线图案; 以及辅助绕组，其设置在所述多层基板的外侧，并且在所述辅助绕组和所述主要主绕组图案或所述次级主绕组图案之间进行第二电力传输。

公开(公告)号：US20140232365A1

公开(公告)日：2014-08-21

申请号：US14095203

申请日：2013-12-03

Applicant: Fujitsu Limited

Inventor： Tomotake SASAKI ,  Tsugito MARUYAMA ,  Yu YONEZAWA ,  Yoshiyasu NAKASHIMA

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2001/0019 ,  H02M2001/0025 ,  H02M2001/0032 ,  H02M2003/1566

Abstract: A control device includes: a power supply circuit that controls output voltage using a switching element; a generation unit that generates a reference signal on the basis of the output voltage from the power supply circuit; a PWM unit that generates a PWM signal that is output to the switching element by comparing the reference signal with a carrier signal; and a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein the generation unit generates the reference signal on the basis of the frequency.

Abstract translation: 控制装置包括：使用开关元件控制输出电压的电源电路; 生成单元，其基于来自电源电路的输出电压生成参考信号; PWM单元，其通过将所述参考信号与载波信号进行比较来产生输出到所述开关元件的PWM信号; 以及切换单元，通过改变载波信号的幅度来切换载波信号的频率，其中生成单元基于频率生成参考信号。

公开(公告)号：US20130322129A1

公开(公告)日：2013-12-05

申请号：US13961635

申请日：2013-08-07

Applicant: Fujitsu Limited

Inventor： Yu YONEZAWA ,  YOSHIYASU NAKASHIMA

IPC: H02M3/28

CPC classification number: H02M3/285 ,  H02M1/4258 ,  H02M3/33569 ,  H02M2001/342 ,  Y02B70/126 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: This is an insulation-type power factor correction circuit including a resonance unit configured to accumulate energy of a surge occurring when the first switching element is turned off and to transmit a resonance current generated by resonating the first capacitor and the primary winding of the second transformer from the primary winding of the second transformer to the secondary winding, a rectifier unit configured to rectify a resonance current output from the resonance unit, a smoothing unit configured to regenerate power output from the rectifier unit to an output of the insulation-type power factor correction circuit, and a control unit configured to control a first switching element for each cycle.

Abstract translation: 这是一种绝缘型功率因数校正电路，包括谐振单元，其被配置为累积当第一开关元件截止时发生的浪涌的能量，并且发送通过谐振第一电容器和第二变压器的初级绕组而产生的谐振电流 从所述第二变压器的初级绕组到次级绕组，整流单元，被配置为对从所述谐振单元输出的谐振电流进行整流;平滑单元，被配置为将从所述整流器单元输出的功率再生到所述绝缘型功率因数的输出 校正电路，以及控制单元，被配置为控制每个周期的第一开关元件。

公开(公告)号：US20150256101A1

公开(公告)日：2015-09-10

申请号：US14629330

申请日：2015-02-23

Applicant: FUJITSU LIMITED

Inventor： Yu YONEZAWA ,  Yoshiyasu NAKASHIMA

IPC: H02M7/217 ,  H02M3/00

CPC classification number: H02M7/217 ,  H02M1/4225 ,  H02M3/00 ,  H02M7/062 ,  H02M7/125 ,  H02M2001/0045 ,  Y02B70/126

Abstract: A power circuit includes: a rectifying circuit configured to rectify an AC voltage; a capacitor configured to integrate an output current of the rectifying circuit; a field effect transistor connected between the rectifying circuit and the capacitor; and a control circuit configured to supply a first gate voltage to a gate of the field effect transistor when a voltage of the capacitor is lower than a threshold value and supply a second gate voltage to the gate of the field effect transistor when the voltage of the capacitor is higher than the threshold value, wherein a resistance of the field effect transistor when the first gate voltage is supplied is higher than a resistance of the field effect transistor when the second gate voltage is supplied.

Abstract translation: 电源电路包括：整流电路，被配置为对AC电压进行整流; 电容器，被配置为对整流电路的输出电流进行积分; 连接在整流电路和电容器之间的场效应晶体管; 以及控制电路，被配置为当所述电容器的电压低于阈值时，向所述场效应晶体管的栅极提供第一栅极电压，并且当所述场效应晶体管的电压为 电容器高于阈值，其中当提供第一栅极电压时场效应晶体管的电阻高于施加第二栅极电压时场效应晶体管的电阻。

公开(公告)号：US20150236590A1

公开(公告)日：2015-08-20

申请号：US14587785

申请日：2014-12-31

Applicant: FUJITSU LIMITED

Inventor： Yu YONEZAWA ,  Yoshiyasu Nakashima

IPC: H02M3/158

CPC classification number: H02M3/1588 ,  H02M1/08 ,  H02M2001/0032 ,  Y02B70/1466 ,  Y02B70/16

Abstract: A synchronous rectification converter includes: a first switching element coupled between a inductor and an input terminal; a second switching element coupled between the inductor and the input terminal; a capacitive element coupled between the other end of the inductor and the other end of the input terminal; a control circuit detects voltages of the inductor and the capacitive element; a current inversion detection circuit detects inversion of a direction in which a current supplied from the second switching element to the inductor flows and outputs an inversion signal; a delay circuit delays the inversion signal and outputs a delay inversion signal; a synchronous rectification reset circuit that changes the control signal; a load detector detects reduction of an output current supplied from a connection node of the inductor and the capacitive element; and a delay control circuit generates a delay control signal.

Abstract translation: 同步整流转换器包括：耦合在电感器和输入端子之间的第一开关元件; 耦合在所述电感器和所述输入端子之间的第二开关元件; 耦合在电感器的另一端和输入端的另一端之间的电容元件; 控制电路检测电感器和电容元件的电压; 电流反转检测电路检测从第二开关元件供应到电感器的电流流过的方向的反转，并输出反转信号; 延迟电路延迟反转信号并输出​​延迟反转信号; 改变控制信号的同步整流复位电路; 负载检测器检测从电感器和电容元件的连接节点提供的输出电流的降低; 并且延迟控制电路产生延迟控制信号。

公开(公告)号：US20150200050A1

公开(公告)日：2015-07-16

申请号：US14540674

申请日：2014-11-13

Applicant: FUJITSU LIMITED

Inventor： Hiroshi NAKAO ,  Yu YONEZAWA ,  Takahiko SUGAWARA ,  Yoshiyasu NAKASHIMA ,  Yoshikatsu ISHIZUKI ,  Shinya SASAKI ,  Shinya IIJIMA

IPC: H01F27/28 ,  H01F41/22

CPC classification number: H01F41/22 ,  H01F17/04 ,  H01F2017/002 ,  H01F2017/065 ,  H01F2038/026 ,  Y10T29/4902

Abstract: An inductor apparatus includes: a substrate including an electrical insulation property and a non-magnetic material; and a plurality of inductors disposed in the substrate so as to extend from a first surface of the substrate to a second surface of the substrate, each of the plurality of inductors including: an inductor conductive part that has an electrical conductivity and extends in a thickness direction of the substrate; and a magnetic layer that covers a side of the inductor conductive part and include a relative permeability and a soft magnetic material.

Abstract translation: 电感器装置包括：具有电绝缘性的基板和非磁性材料; 以及多个电感器，其设置在所述基板中，以从所述基板的第一表面延伸到所述基板的第二表面，所述多个电感器中的每一个包括：电感器导电部，其具有导电性并且以厚度 基板的方向; 以及覆盖电感器导电部分的一侧并包括相对磁导率和软磁性材料的磁性层。