WO2017047068A1 - スイッチング電源装置、スイッチング電源の駆動方法、スイッチング電源の駆動プログラム - Google Patents
スイッチング電源装置、スイッチング電源の駆動方法、スイッチング電源の駆動プログラム Download PDFInfo
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- WO2017047068A1 WO2017047068A1 PCT/JP2016/004139 JP2016004139W WO2017047068A1 WO 2017047068 A1 WO2017047068 A1 WO 2017047068A1 JP 2016004139 W JP2016004139 W JP 2016004139W WO 2017047068 A1 WO2017047068 A1 WO 2017047068A1
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0211—Frequency selective networks using specific transformation algorithms, e.g. WALSH functions, Fermat transforms, Mersenne transforms, polynomial transforms, Hilbert transforms
- H03H17/0213—Frequency domain filters using Fourier transforms
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
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- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
Definitions
- the present invention relates to a switching power supply device, a switching power supply driving method, and a switching power supply drive program.
- Patent Document 1 Japanese Patent Laid-Open No. 2014-83155 is an ultrasonic diagnostic apparatus that uses a plurality of switching power supplies, and operates the switching power supplies at different switching frequencies. In this way, rail noise caused by superposition of switching frequency can be reduced.
- Patent Document 2 Japanese Patent Laid-Open No. 2012-151937 discloses the following switching power supply device.
- a power supply system is configured with a plurality of switching power supply devices
- beat noise having a frequency difference between the switching frequencies of the switching power supply devices is generated in the output.
- each switching power supply device is provided with a synchronous operation control circuit, one switching power supply device is used as a master, and the other is a slave power supply whose switching frequency is determined based on an oscillation clock signal of the master power supply. In this way, even if there are variations in the individual oscillation clock signals, the switching frequencies of the switching power supply devices are matched to prevent the occurrence of beat noise.
- Patent Document 3 Japanese Patent Application Laid-Open No. 2011-104666 discloses a noise reduction technique for a switching power supply device using a plurality of switching power supply units.
- a modulation signal output unit that outputs a modulation signal for controlling the switching power supply unit is controlled by a signal representing the state of the switching element in the switching power supply unit, and the configuration of the modulation signal output unit can be changed.
- a frequency adjustment unit that varies the frequency of the modulation signal is provided. The frequency adjustment unit adjusts the output frequency so that noise caused by the switching power supply unit is reduced. Specifically, the frequency is set so as not to affect the measurement.
- FIG. 6 of Patent Document 3 shows a relationship between a measurement frequency at which a measurement signal is measured by a semiconductor test apparatus or the like and noise generated by the switching power supply unit.
- FIG. 6A shows the case where the measurement frequency and the frequency of the noise frequency spectrum match. In this case, the measurement is greatly affected by noise. In such a case, the noise spectrum can be shifted from the measured frequency as shown in FIG. 6B by shifting the output frequency of the frequency adjusting unit.
- Patent Documents 1 and 2 are both inventions relating to problems that occur between a plurality of switching power supplies, and cannot solve the same noise component superimposed on the primary power supply and the switching frequency of the switching power supply.
- the measurement frequency in Patent Document 3 is the frequency of a signal output from a test target of a semiconductor test apparatus. Similar to Patent Documents 1 and 2, the noise component superimposed on the primary power supply and the switching frequency of the switching power supply Cannot be resolved.
- An object of the present invention is to provide a switching power supply device, a switching power supply driving method, and a switching power supply drive program that can solve the above-described problems and avoid the increase of noise of a specific frequency component.
- the present invention analyzes a switching power supply that switches an input from a primary power supply and outputs it as a secondary power supply, and analyzes a frequency component of noise included in the output of the primary power supply or the secondary power supply.
- a switching power supply device comprising a noise frequency analysis device that switches the switching power supply at a frequency different from amplitude noise.
- the present invention is a switching power supply driving method for switching an input from a primary power supply and outputting it as a secondary power supply, analyzing a frequency component contained in the primary power supply or the output of the secondary power supply, A switching power supply driving method characterized in that the switching power supply is switched at a frequency different from the maximum amplitude noise among the components.
- the present invention is a switching power supply driving program for switching an input from a primary power supply and outputting it as a secondary power supply, a process of analyzing a frequency component contained in the primary power supply or the output of the secondary power supply, A switching power supply driving program for causing a computer to execute a process of switching the switching power supply at a frequency different from the maximum amplitude noise among the frequency components.
- a switching power supply device capable of avoiding an increase in noise of a specific frequency component.
- FIG. 1 is a block diagram showing a first embodiment of the present invention.
- the switching power supply device of this embodiment includes a switching power supply 101 and a noise frequency analysis device 304.
- the switching power supply 101 switches the input from the primary power supply 100 and outputs it as a secondary voltage 102.
- This secondary voltage 102 is a secondary power source.
- the noise frequency analysis device 304 analyzes a frequency component included in the output of the primary power supply 100, and causes the switching power supply 101 to switch the primary power supply 100 at a frequency different from the noise frequency having the maximum peak of the primary power supply 100.
- a control signal 105 is output.
- FIG. 2 is a block diagram showing a switching power supply device according to a second embodiment of the present invention.
- a plurality of switching power supplies (three terminals 101a, 101b, and 101c in FIG. 2) are mounted, and all use the same primary power supply 100.
- the switching power supplies 101a, 101b, and 101c receive control signals 105a, 105b, and 105c from the CPU 104, respectively, so that the switching frequency and switching timing can be controlled.
- DC-DC converters are used as the switching power supplies 101a, 101b, and 101c.
- a PWM (Pulse Width Modulation) type DC-DC converter can be used.
- the AD converter 103 performs AD (Analog-Digital) conversion of the voltage of the primary power supply 100 and transmits a digital signal 108 obtained by digitizing the voltage value to the CPU 104.
- the CPU 104 is configured by a microcomputer (Micro Processor, Micro Controller) or a DSP (Digital Signal Processor).
- the CPU 104 analyzes the digital data received from the AD converter 103 and outputs control signals 105a, 105b, and 105c to the switching power supplies 101a, 101b, and 101c.
- the control signals 105a, 105b, and 105c set the switching frequency and the switching timing of the switching power supplies 101a, 101b, and 101c.
- the power supply filters 106 a, 106 b, and 106 c remove noise superimposed on the supplied primary power supply 100 and also prevent switching noise generated by the switching power supplies 101 a, 101 b, and 101 c from being superimposed on the primary power supply 100.
- the power supply filters 107a, 107b, and 107c are mounted to remove switching noise generated by the switching power supplies 101a, 101b, and 101c.
- the AD converter 103 in FIG. 2 AD-converts the primary power supply 100 at a constant period and converts the voltage value into a digital signal 108.
- the CPU 104 receives the digital signal 108 as data representing the time-series fluctuation of the voltage of the primary power supply 100 (original data 201 in FIG. 3).
- the CPU 104 Upon receiving the digital signal 108 representing the voltage value of the primary power supply 100, the CPU 104 performs processing such as FFT (Fast Fourier Transform) on the digital signal 108, and converts it into the frequency sequence conversion data 202 shown in FIG. Convert.
- FFT Fast Fourier Transform
- the vertical axis in FIG. 3 is the amplitude.
- the CPU 104 before starting the operation of the switching power supplies 101a, 101b, and 101c, as shown in the flowchart of FIG. 5, the CPU 104 performs the FFT calculation of the primary power supply, and the noise components 203a, 203b, 203c is obtained (S51). A frequency with less noise component is specified from the data 202 (S52). The CPU 104 controls the switching power supplies 101a, 101b, and 101c so as to switch at a switching frequency with less noise superimposed on the primary power supply via the control signals 105a, 105b, and 105c (S53).
- the frequency of the component of the maximum amplitude in the noise of the primary power supply is 500 KHz
- 400 KHz or 600 KHz separated by 100 KHz is a frequency having a small noise component
- switching is performed at a switching frequency of 400 KHz or 600 KHz.
- switching was performed at 600 KHz.
- This switching frequency does not overlap with the frequencies of other noises 203a and 203c that do not have the maximum amplitude.
- the switching frequency of the three switching power supplies is the same.
- the noise components 203a, 203b, 203c superimposed on the primary power supply and the noise component 400 due to switching of the switching power supplies 101a, 101b, 101c have different frequencies and do not overlap.
- the noise generated on the secondary side of the switch power supply is prevented from becoming strong at a specific frequency and removed by the secondary side power supply filters (107a, 107b and 107c in FIG. 2). It becomes easy to do.
- a CPU is used to control the switching power supply.
- a switching power supply control program is added to the program for operating the CPU. Therefore, it is possible to reduce the size and cost of the entire circuit by causing the CPU to generate a switching signal without providing a switching controller.
- an AD converter 103 is provided.
- an AD converter is generally installed for the purpose of voltage monitoring, and the output of the AD converter can be used. Therefore, it is not necessary to add a new part.
- the switching power supplies 101a, 101b, and 101c can be applied not only to the PWM type switching power supply but also to the frequency control type switching power supply.
- the switching frequencies of the plurality of switching power supplies are the same. However, the switching frequencies of the plurality of switching power supplies 101a, 101b, and 101c can be shifted from each other. Then, as shown in FIG. 7, the frequencies of the noise components 501a, 501b, and 501c generated by the switching power supplies 101a, 101b, and 101c are all different from each other. Therefore, the noise level can be further reduced.
- the frequency of the noise component is detected from the primary power supply side. However, as shown in FIG.
- the AD converter 603 measures the secondary voltages 102a, 102b, and 102c as the secondary power source, and outputs a digital signal 605 obtained by AD converting the measured value to the CPU 104. Subsequent operations are the same as those in the first to third embodiments. Since the user knows the switching frequency of a switching power supply such as a DC-DC converter managed by the user, other frequencies can be specified as noise. (Fifth embodiment) In the first to fourth embodiments, the switching frequency used is a frequency that does not overlap any of the plurality of noise component frequencies of the primary power supply or the secondary power supply.
- the total amplitude of the small amplitude noise and the noise generated by the switching power supply may be within a range that can be removed by the noise filter. In that case, the switching frequency and the frequency of the noise component with a small amplitude may overlap.
- the voltage amplitude that can be removed by the noise filter is set as a threshold, and if the noise has a peak less than that, the switching frequency can be determined as overlapping.
- the degree of freedom in determining the switching frequency is improved.
- a frequency having a small noise component is specified before the operation of the switching power supply is started.
- the present invention is not limited to this, and it may be specified during the operation of the switching power supply. This is effective when the noise component may change over time. It may also be specified both before the start of operation and during operation.
- the noise frequency analysis device of the present invention may be realized by a dedicated device, or may be realized by a CPU (computer) as described in the second embodiment.
- the computer reads a software program stored in a memory (not shown), and executes the read software program in the CPU, thereby outputting a control signal as an execution result to the switching power supply.
- the software program only needs to be described so as to realize the functions of the CPU and the switching power supply.
- a computer-readable storage medium storing this software program can also be understood as constituting the present invention.
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Abstract
Description
図1は本発明の第1の実施形態を示すブロック図である。本実施形態のスイッチング電源装置はスイッチング電源101とノイズ周波数解析装置304を備える。スイッチング電源101は一次電源100からの入力をスイッチングして二次電圧102として出力する。この二次電圧102が二次電源である。ノイズ周波数解析装置304は、一次電源100の出力に含まれる周波数成分を解析し、スイッチング電源101に対して、一次電源100の最大のピークを持つノイズ周波数とは異なる周波数で一次電源100をスイッチングさせる制御信号105を出力する。このようにすると、二次電源は、一次電源に重畳するノイズ成分とスイッチング電源101のスイッチング周波数が同一になることを回避し、特定の周波数成分のノイズが突出して大きくなるのを防ぐことができる。
(第2の実施形態)
<実施形態の構成>
図2は本発明の第2の実施形態のスイッチング電源装置を示すブロック図である。
<実施形態の動作>
図2におけるADコンバータ103は一次電源100を一定周期でAD変換し電圧値をデジタル信号108に変換する。CPU104は、デジタル信号108を一次電源100の電圧の時系列の変動を表すデータ(図3の元データ201)として受け取る。
(第3の実施形態)
第2の実施形態では、複数のスイッチング電源のスイッチング周波数を同じとした。そかし、複数のスイッチング電源101a、101b、101cのスイッチング周波数を互いにずらすこともできる。すると図7に示すように、スイッチング電源101a、101b、101cがそれぞれ発生するノイズ成分501a、501b、501cの周波数が互いに全て異なる。そのためノイズレベルをさらに下げることが可能となる。
(第4の実施形態)
第1~第3の実施形態では一次電源側からノイズ成分の周波数を検出した。しかし図8に示す通り、二次側からでも検出可能である。ADコンバータ603が二次電源としての二次電圧102a,102b、102cを測定し、測定値をAD変換したデジタル信号605をCPU104に出力する。以降は第1~第3の実施形態と同様の動作である。ユーザは、自分が管理しているDC-DCコンバータ等のスイッチング電源のスイッチング周波数は分かっているので、それ以外の周波数をノイズとして特定できる。
(第5の実施形態)
第1~第4の実施形態では、スイッチング周波数は、一次電源または二次電源の、複数存在するノイズ成分の周波数のどれにも重ならない周波数を使った。しかし複数のノイズ成分のうち一部のノイズの振幅が非常に小さいと、その小振幅のノイズとスイッチング電源が発生するノイズの合計振幅がノイズフィルタで除去できる程度に収まることがある。その場合はスイッチング周波数と小振幅のノイズ成分の周波数が重なっても構わない。
(第6の実施形態)
第1~第5の実施形態では、スイッチング電源の動作開始前にノイズ成分が少ない周波数を特定している。しかしこれに限らず、スイッチング電源の動作中に特定してもよい。ノイズ成分が時間変化する可能性がある場合に有効である。また動作開始前と動作中の両方で特定しても良い。
101 スイッチング電源
102、102a、102b、102c 二次電圧
103 ADコンバータ
104 CPU
304 ノイズ周波数解析装置
105、105a、105b、105c 制御信号
106a、106b、106c、107a、107b、107c ノイズフィルタ
108、605 デジタル信号
201 元データ
202 変換データ
203a、203b、203c ノイズ成分
501a、501b、501c ノイズ成分
603 ADコンバータ
Claims (10)
- 一次電源からの入力をスイッチングして二次電源として出力するスイッチング電源と、前記一次電源または前記二次電源の出力に含まれるノイズの周波数成分を解析し、前記周波数成分のうち最大振幅のノイズと異なる周波数で前記スイッチング電源にスイッチングさせるノイズ周波数解析装置を備えたことを特徴とするスイッチング電源装置。
- 請求項1のスイッチング電源を前記一次電源または前記二次電源の間に複数並列接続し、前記ノイズ周波数解析装置は、前記解析したノイズの周波数成分のうち最大振幅のノイズと異なる周波数で前記スイッチング電源にスイッチングさせるスイッチング電源装置。
- 前記一次電源または前記二次電源の出力に含まれるノイズの周波数成分が複数ある場合、前記ノイズ周波数解析装置は前記複数あるノイズの周波数成分のいずれとも異なる周波数で前記スイッチング電源にスイッチングさせる請求項1または2のスイッチング電源装置。
- 前記一次電源または前記二次電源のノイズ周波数の解析にはFFT(Fast Fourier Transform)を用いる請求項1から3のいずれか一項に記載のスイッチング電源装置。
- 前記一次電源または前記二次電源の出力電圧の変動をデジタルデータに変換して前記ノイズ周波数解析装置に出力するADコンバータを備える請求項1から4のいずれか一項に記載のスイッチング電源装置。
- 前記一次電源と前記スイッチング電源及び前記二次電源と前記スイッチング電源の間にノイズフィルタを備えた請求項1から5のいずれか一項に記載のスイッチング電源装置。
- 前記ノイズの周波数成分の解析は、前記スイッチング電源の動作開始前に行う請求項1から6のいずれか一項に記載のスイッチング電源装置。
- 前記スイッチング電源はDC-DCコンバータである請求項1から7のいずれか一項に記載のスイッチング電源装置。
- 一次電源からの入力をスイッチングして二次電源として出力するスイッチング電源の駆動方法であって、前記一次電源または前記二次電源の出力に含まれる周波数成分を解析し、前記周波数成分のうち最大振幅のノイズと異なる周波数で前記スイッチング電源をスイッチングさせることを特徴とするスイッチング電源の駆動方法。
- 一次電源からの入力をスイッチングして二次電源として出力するスイッチング電源の駆動プログラムであって、前記一次電源または前記二次電源の出力に含まれる周波数成分を解析する処理と、前記周波数成分のうち最大振幅のノイズと異なる周波数で前記スイッチング電源をスイッチングさせる処理をコンピュータに実行させること特徴とするスイッチング電源の駆動プログラム。
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JP2017540499A JP6642582B2 (ja) | 2015-09-15 | 2016-09-12 | スイッチング電源装置、スイッチング電源の駆動方法、スイッチング電源の駆動プログラム |
US15/756,703 US20180278154A1 (en) | 2015-09-15 | 2016-09-12 | Switching power supply apparatus, driving method for switching power supply, and driving program for switching power supply |
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2016
- 2016-09-12 CN CN201680053404.4A patent/CN108141130A/zh active Pending
- 2016-09-12 US US15/756,703 patent/US20180278154A1/en not_active Abandoned
- 2016-09-12 WO PCT/JP2016/004139 patent/WO2017047068A1/ja active Application Filing
- 2016-09-12 JP JP2017540499A patent/JP6642582B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010142111A (ja) * | 2004-03-15 | 2010-06-24 | Rohm Co Ltd | 電源装置 |
JP2007336424A (ja) * | 2006-06-19 | 2007-12-27 | Pioneer Electronic Corp | パワー増幅装置 |
JP2008118737A (ja) * | 2006-11-01 | 2008-05-22 | Yokogawa Electric Corp | 電源装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020058154A (ja) * | 2018-10-03 | 2020-04-09 | 富士通株式会社 | 制御回路および情報処理装置 |
JP7067399B2 (ja) | 2018-10-03 | 2022-05-16 | 富士通株式会社 | 制御回路および情報処理装置 |
Also Published As
Publication number | Publication date |
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JP6642582B2 (ja) | 2020-02-05 |
JPWO2017047068A1 (ja) | 2018-05-24 |
US20180278154A1 (en) | 2018-09-27 |
CN108141130A (zh) | 2018-06-08 |
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