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POWER SUPPLY CONTROL DEVICE commons meetings

Foreign code F190009701
File No. (FU-292)
Posted date Jan 23, 2019
Country WIPO
International application number 2018JP012352
International publication number WO 2018190117
Date of international filing Mar 27, 2018
Date of international publication Oct 18, 2018
Priority data
  • P2017-077372 (Apr 10, 2017) JP
Title POWER SUPPLY CONTROL DEVICE commons meetings
Abstract Provided is a power supply control device making the vicinity of the peak of a voltage value as flat as possible and using an ultra-small switching circuit that makes contact and contactless power feeding possible. The power supply control device is provided with: a rectifier diode 3 for converting an AC power to a DC power; an inverter circuit 4 operating at high frequency with the DC power; a primary side transformer 5 connected to the inverter circuit 4; a secondary side high-frequency transformer 6 magnetically coupled with the primary side transformer 5; and a rectifier 8 for converting the AC power converted to voltage by the secondary side high-frequency transformer 6 to a DC power. The inverter circuit 4 has a plurality of switching elements which are connected in series to divide an input voltage. Each of the switching elements has a harmonic resonant circuit and has a control means for controlling a voltage peak value of each of the switching elements.
Outline of related art and contending technology BACKGROUND ART
In recent years with the miniaturization of the information processing terminals such as, the size of the AC adapter supplies a direct current power is desired, the size of the AC adapter may fail in a relatively large in most cases.In addition, the power supply cable for a connector and the like is indispensable, they are mechanically fragile, there is a problem such as degradation from the earlier, non-contact power supply technique has been developed.However, in the non-contact power supply since the frequency is, the resonance type high frequency switching power supply it is necessary to use, the device having a high breakdown voltage transistor needs to be used.
Of a high frequency switching as a technique to realize high efficiency, as shown in Fig. 14 the class E inverter has been known. (A) Fig. 14 is a circuit diagram of a class E inverter, (B) is a voltage waveform shown in Fig. 14.Class E inverter, the switching of the soft switching by the voltage and current applied to the transistor at the moment can be eliminated, reduced switching loss, high efficiency is realized.However, as shown in Fig. 14 (B), in this circuit the peak value of the voltage is increased, a transistor having a high withstand voltage needs to be used.
Therefore, a harmonic component by injecting a current switch, a technology of lowering the peak value of the voltage has been disclosed (see Fig. 15). (A) the circuit shown in Fig. 15, known as class Φ (VHF converter) and the inverter, the switching frequency of the VHF band operates in the (30MHz-300MHz).This circuit is, as shown in Fig. 15 (B), a voltage waveform and recessed to reduce the peak voltage, a low withstanding voltage transistor is used and it is possible, the switching circuit is used to realize downsizing of the AC adapter according to the present invention.However, the technique shown in Fig. 15, are used for resonance, it is difficult to adjust the peak voltage, peak value of the optimization in the case of difficulty.In addition, the peak is displaced even a little, a high voltage value and an unstable state, due to the large load is applied to the element.
A switching circuit operating at high frequencies as described above on the basis of the technique, the technique shown in Non-Patent Document 1 is disclosed by the inventors.Non-Patent Document 1 is a technique in which, a plurality of switches can be serially connected and dividing the voltage, the voltage applied to the 1 per one transistor can be decreased, a very low breakdown voltage transistors are used as the switching circuit to be realized in the art, using Fig. 15 the switching circuit to the AC adapter is miniaturized further than is possible according to the present invention.
Scope of claims (In Japanese)請求の範囲 [請求項1]
 交流電力を直流電力に変換する第1変換手段と、
 前記直流電力に対して高周波数下で動作するインバータ回路と、
 前記インバータ回路に接続される一次側トランスと、
 前記一次側トランスと磁気結合する二次側トランスと、
 前記二次側トランスで電圧変換された交流電力を直流電力に変換する第2変換手段とを備え、
 前記インバータ回路が複数のスイッチング素子を有し、当該複数のスイッチング素子が直列接続して入力電圧を分割し、各スイッチング素子が高調波共振回路を有し、当該各スイッチング素子おけるそれぞれの電圧ピーク値を制御する制御手段を有することを特徴とする電源制御装置。

[請求項2]
 請求項1に記載の電源制御装置において、
 外部から非接触で給電する非接触電源と磁気結合する二次側コイルを備え、
 前記第2変換手段が、前記二次側高周波トランスで電圧変換された交流電力、及び/又は前記二次側コイルで誘導された交流電力を直流電力に変換することを特徴とする電源制御装置。

[請求項3]
 請求項2に記載の電源制御装置において、
 前記一次側トランス、前記二次側高周波トランス及び前記二次側コイルのそれぞれが、各層の面内に渦状に巻回されて形成され、前記一次側トランスと前記二次側高周波トランスとが隣接して積層され、前記二次側高周波トランスと前記二次側コイルとが磁気シールドを介して積層されていることを特徴とする電源制御装置。

[請求項4]
 交流電力を直流電力に変換する第1変換手段と、
 前記直流電力に対して高周波数下で動作するインバータ回路と、
 前記インバータ回路に接続される一次側トランスと、
 前記一次側トランスと磁気結合する二次側高周波トランスと、
 外部から非接触で給電する非接触電源と磁気結合する二次側コイルと、
 前記二次側高周波トランスで電圧変換された交流電力、及び/又は前記二次側コイルで誘導された交流電力を直流電力に変換する第2変換手段とを備えることを特徴とする電源制御装置。

[請求項5]
 請求項4に記載の電源制御装置において、
 前記一次側トランス、前記二次側高周波トランス及び前記二次側コイルのそれぞれが、各層の面内に渦状に巻回されて形成され、前記一次側トランスと前記二次側高周波トランスとが隣接して積層され、前記二次側高周波トランスと前記二次側コイルとが磁気シールドを介して積層されていることを特徴とする電源制御装置。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • FUKUOKA UNIVERSITY
  • Inventor
  • SUETSUGU Tadashi
IPC(International Patent Classification)

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