WO2018186344A1 - Bloc d'alimentation et procédé de commande de bloc d'alimentation - Google Patents

Bloc d'alimentation et procédé de commande de bloc d'alimentation Download PDF

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Publication number
WO2018186344A1
WO2018186344A1 PCT/JP2018/014091 JP2018014091W WO2018186344A1 WO 2018186344 A1 WO2018186344 A1 WO 2018186344A1 JP 2018014091 W JP2018014091 W JP 2018014091W WO 2018186344 A1 WO2018186344 A1 WO 2018186344A1
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WO
WIPO (PCT)
Prior art keywords
current
transformer
switching element
power supply
fet
Prior art date
Application number
PCT/JP2018/014091
Other languages
English (en)
Japanese (ja)
Inventor
隆章 佐野
魁元 張
Original Assignee
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Publication of WO2018186344A1 publication Critical patent/WO2018186344A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac

Definitions

  • the power supply apparatus includes a transformer, a first switching element connected in series to a primary winding of the transformer, a first capacitor connected in parallel to the first switching element, and the primary winding.
  • a power supply device comprising: a series circuit of a second switching element and a second capacitor connected in parallel to a line; and a control unit that controls on / off of the first switching element and the second switching element.
  • the current acquisition unit acquires the transformer current.
  • the transformer current is the sum of the load current flowing in the load and the excitation current of the transformer, and in the case of negative polarity, only the excitation current is obtained.
  • the determination unit determines whether or not the transformer is magnetically saturated based on the current acquired by the current acquisition unit and a predetermined current threshold at any time when the second switching element is on and the current of the transformer is positive. Determine whether.
  • the power supply device when the excitation current of the transformer reaches a predetermined limit value when the second switching element is turned off, the power supply device at the time when the second switching element is turned on.
  • a specifying unit that specifies a temporal change characteristic of the current of the transformer based on the current of the transformer and the limit value at the time when the second switching element is turned off; The current corresponding to the arbitrary time point with the temporal change characteristic specified in (1).
  • the current threshold is a current corresponding to an arbitrary point in time change characteristic specified by the specific unit. That is, when the excitation current acquired at an arbitrary time is on a virtual straight line that is a temporal change characteristic, the boundary of whether or not the magnetic saturation occurs, that is, the transformer is magnetically saturated when the second switching element is turned off. However, the current threshold can be set on this temporal change characteristic.
  • the determination unit determines that the transformer is magnetically saturated when the current acquired by the current acquisition unit at the arbitrary time is equal to or less than the current threshold.
  • one end of the capacitor 22 is connected to one end of the primary winding 31, and the drain of the FET 12 is connected to the other end of the capacitor 22.
  • the source of the FET 12 is connected to the other end of the primary winding 31.
  • the other end of the inductor 61 is connected to the terminal C.
  • a capacitor 23 is connected between the terminals C and D.
  • the control unit 50 outputs a gate voltage to the gates of the FETs 11 and 12.
  • the control unit 50 includes a current acquisition unit 51, a specification unit 52, a determination unit 53, and the like.
  • the determination unit 53 determines whether or not the transformer 30 is magnetically saturated based on the current acquired by the current acquisition unit 51 and a predetermined current threshold at any time when the current of the transformer 30 is positive while the FET 12 is on. Determine whether. Details of the determination unit 53 will be described later.
  • FIG. 2 is a time chart showing an example of the waveform of each part of the power supply apparatus 100 of the present embodiment.
  • the waveforms of the gate voltage of the FET 11, the gate voltage of the FET 12, the current of the transformer 30 (hereinafter also referred to as transformer current), and the excitation current of the transformer 30 (hereinafter also referred to as excitation current) are schematically illustrated from above. Show. Since the waveform of each part is schematically illustrated for convenience, the actual waveform of each part may be different.
  • the period T is divided into four periods D1, D2, D3, and D4.
  • the period D1 is an ON period of the FET 11, and the FET 11 is repeatedly turned on / off at a predetermined duty ratio (D1 / T).
  • the period D3 is an ON period of the FET 12, and the FET 12 is repeatedly turned on / off at a predetermined duty ratio (D3 / T).
  • Periods D2 and D4 are periods in which both FET11 and FET12 are off.
  • the temporal change amount of the excitation current corresponds to the temporal change amount of the load current.
  • the slopes of the straight lines indicating the change in the current are the same.
  • the exciting current Im flows through the closed loop of the transformer 30 and the diodes 42 and 41. In the period D4, since the voltage applied to the excitation inductance Lm is substantially zero, the excitation current Im is maintained.
  • the determination unit 53 Based on the current acquired by the current acquisition unit 51 and the predetermined current threshold at any time when the current of the transformer 30 is positive during the period when the FET 12 is on, the determination unit 53 It is determined whether or not magnetic saturation occurs.
  • the temporal change in the excitation current during the on-period of the FET 12 is considered to be linear, the larger the current of the transformer 30 acquired by the current acquisition unit 51 at any time when the current of the transformer 30 becomes positive, the larger the current is.
  • the possibility of reaching the magnetic saturation at the negative polarity is low, and conversely, the smaller the current of the transformer 30 acquired by the current acquisition unit 51 at any time when the current of the transformer 30 becomes positive, The likelihood of reaching magnetic saturation tends to increase.
  • the determination unit 53 is a negative-polarity transformer 30 based on the current acquired by the current acquisition unit 51 and the predetermined current threshold at any time when the current of the transformer 30 is positive while the FET 12 is on. It can be determined whether or not is magnetically saturated.
  • the control unit 50 controls the on / off of the FET 12 with a predetermined duty ratio (for example, D3 / T).
  • a predetermined duty ratio for example, D3 / T.
  • the control unit 50 decreases the duty ratio and turns off the FET 12 at a time before the time when the transformer 30 is magnetically saturated.
  • the duty ratio can be increased within a range in which the transformer 30 is not magnetically saturated, so that a decrease in output power can be suppressed without the transformer 30 being magnetically saturated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Ce bloc d'alimentation est pourvu d'une unité d'acquisition de courant qui acquiert le courant d'un transformateur, et d'une unité de détermination qui, à tout moment lorsque le courant du transformateur est positif pendant la période de marche d'un second élément de commutation, détermine si le transformateur est saturé magnétiquement sur la base du courant acquis par l'unité d'acquisition de courant et d'une valeur de seuil de courant prescrite. Sur la base du résultat de détermination de l'unité de détermination, une unité de commande effectue une commande pour éteindre le second élément de commutation.
PCT/JP2018/014091 2017-04-05 2018-04-02 Bloc d'alimentation et procédé de commande de bloc d'alimentation WO2018186344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-075499 2017-04-05
JP2017075499 2017-04-05

Publications (1)

Publication Number Publication Date
WO2018186344A1 true WO2018186344A1 (fr) 2018-10-11

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Application Number Title Priority Date Filing Date
PCT/JP2018/014091 WO2018186344A1 (fr) 2017-04-05 2018-04-02 Bloc d'alimentation et procédé de commande de bloc d'alimentation

Country Status (1)

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WO (1) WO2018186344A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113785484A (zh) * 2019-04-25 2021-12-10 株式会社电装 电力转换装置的控制装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008199878A (ja) * 2007-01-19 2008-08-28 Toyota Industries Corp Ｄｃ−ｄｃコンバータの制御方法、およびｄｃ−ｄｃコンバータ
JP2009290932A (ja) * 2008-05-27 2009-12-10 Toyota Industries Corp スイッチング電源装置
JP2010226931A (ja) * 2009-03-25 2010-10-07 Toyota Industries Corp 絶縁形ｄｃ−ｄｃコンバータ
JP2011041419A (ja) * 2009-08-17 2011-02-24 Cosel Co Ltd スイッチング電源装置
JP2013251938A (ja) * 2012-05-30 2013-12-12 Hitachi Media Electoronics Co Ltd スイッチング電源及びスイッチング電源を備えた電子機器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008199878A (ja) * 2007-01-19 2008-08-28 Toyota Industries Corp Ｄｃ−ｄｃコンバータの制御方法、およびｄｃ−ｄｃコンバータ
JP2009290932A (ja) * 2008-05-27 2009-12-10 Toyota Industries Corp スイッチング電源装置
JP2010226931A (ja) * 2009-03-25 2010-10-07 Toyota Industries Corp 絶縁形ｄｃ−ｄｃコンバータ
JP2011041419A (ja) * 2009-08-17 2011-02-24 Cosel Co Ltd スイッチング電源装置
JP2013251938A (ja) * 2012-05-30 2013-12-12 Hitachi Media Electoronics Co Ltd スイッチング電源及びスイッチング電源を備えた電子機器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113785484A (zh) * 2019-04-25 2021-12-10 株式会社电装 电力转换装置的控制装置
CN113785484B (zh) * 2019-04-25 2024-04-02 株式会社电装 电力转换装置的控制装置

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