JPH0564442A - High-voltage power supply equipment - Google Patents

High-voltage power supply equipment

Info

Publication number
JPH0564442A
JPH0564442A JP3219581A JP21958191A JPH0564442A JP H0564442 A JPH0564442 A JP H0564442A JP 3219581 A JP3219581 A JP 3219581A JP 21958191 A JP21958191 A JP 21958191A JP H0564442 A JPH0564442 A JP H0564442A
Authority
JP
Japan
Prior art keywords
waveform shaping
transformer
power supply
capacitor
voltage
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP3219581A
Other languages
Japanese (ja)
Other versions
JP3141435B2 (en
Inventor
Kazuhiko Narishima
和彦 成島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP03219581A priority Critical patent/JP3141435B2/en
Publication of JPH0564442A publication Critical patent/JPH0564442A/en
Application granted granted Critical
Publication of JP3141435B2 publication Critical patent/JP3141435B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To configure easily a DC output generating circuit (for superimposing a DC component and for obtaining an independent DC output) out of an AC high-voltage power supply equipment. CONSTITUTION:A rectifying circuit 60 is connected in series with a waveform shaping capacitor 5, which is connected with a winding 22 of the high-voltage side of a step-up transformer 2. The current flowing through the waveform shaping capacitor 5 is rectified, and is made to generate a DC component by smoothing. By utilizing a part of the reactive current flowing through the waveform shaping capacitor 5 of an AC high-voltage power supply, without damaging the waveform shaping function of the waveform shaping capacitor, a DC output can be obtained using a simple configuration.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【従来の技術】一般に、複写機などの電子写真装置は、
中間記録媒体である感光体(感材)を一様に帯電する帯
電ステーション、帯電された感光体上に静電潜像を形成
する露光ステーション、静電潜像をトナーにより顕像化
する現像ステーション、トナーにより形成された顕像を
転写紙に転写する転写ステーション、および転写紙上の
トナー像を固定する定着ステーションを備え、これらの
各ステーションを経る一連のプロセスによって文字や画
像等の情報を再現する。
2. Description of the Related Art Generally, an electrophotographic apparatus such as a copying machine is
A charging station that uniformly charges the photoconductor (sensitive material) that is an intermediate recording medium, an exposure station that forms an electrostatic latent image on the charged photoconductor, and a development station that visualizes the electrostatic latent image with toner. , A transfer station for transferring the toner image formed on the transfer paper to the transfer paper, and a fixing station for fixing the toner image on the transfer paper, and reproducing information such as characters and images by a series of processes passing through these stations. ..

【0002】上記プロセス中では、複数種のコロナ放電
器(以下、帯電器と称する)が使用されるが、特に感光
体に形成したトナー像を転写紙に転写する転写ステーシ
ョンおける主転写帯電器の前段にはプレ転写帯電器が設
置され、また転写プロセス後には感光体から転写紙を剥
離するための転写紙剥離帯電器が設けられている。これ
らのプレ転写帯電器や転写紙剥離帯電器の電源として、
交流電圧に直流電圧を重畳させた直流重畳交流高圧電源
装置が用いられる。
In the above process, a plurality of types of corona dischargers (hereinafter referred to as chargers) are used. Particularly, a main transfer charger in a transfer station for transferring a toner image formed on a photoconductor onto a transfer paper is used. A pre-transfer charger is installed in the preceding stage, and a transfer paper peeling charger for peeling the transfer paper from the photoconductor is provided after the transfer process. As a power source for these pre-transfer chargers and transfer paper peeling chargers,
A DC superimposed AC high voltage power supply device in which a DC voltage is superimposed on an AC voltage is used.

【0003】上記プレ転写帯電器に印加する交流高圧に
直流成分を重畳する目的は、当該交流電圧の中心値を感
光体上の像部電位と像部以外の電位との間で像部の電位
は転写し易い側に、像部以外の電位は転写し難い側にシ
フトして、像部の濃度を上げ、像部以外のトナーが記録
紙に転写されないようにすることである。また、転写紙
に感光体のトナー像を転写した後、剥離帯電器に印加す
る交流電界で転写時に印加した転写電界による電荷を除
去して感光体と転写紙との静電結合力を緩和するように
しているが、剥離時に剥離力が不足していたり、剥離電
界が強すぎてトナー像が感光体側に残留することがあ
る。剥離帯電器に印加する交流高圧に直流成分を重畳す
る目的は、転写紙の電位を直流成分で調整して感光体か
ら転写紙が容易に剥離できるようにするためである。
The purpose of superimposing a DC component on the AC high voltage applied to the pre-transfer charger is to set the center value of the AC voltage between the image portion potential on the photosensitive member and the potential other than the image portion. Is to shift the potential of the portion other than the image portion to the side where transfer is easy and to the side where transfer is difficult to increase the density of the image portion so that toner other than the image portion is not transferred to the recording paper. Further, after the toner image on the photoconductor is transferred onto the transfer paper, the electric field due to the transfer electric field applied at the time of transfer is removed by the AC electric field applied to the peeling charger to reduce the electrostatic coupling force between the photoconductor and the transfer paper. However, the peeling force may be insufficient at the time of peeling, or the peeling electric field may be too strong and the toner image may remain on the photoreceptor side. The purpose of superimposing the DC component on the AC high voltage applied to the peeling charger is to adjust the potential of the transfer paper with the DC component so that the transfer paper can be easily peeled from the photoreceptor.

【0004】従来のこの種の高圧電源は、例えば特公平
1−27422号公報、あるいは特開平2−27708
1号公報に記載されているように、直流電源に接続した
昇圧トランスの高圧側巻線と並列接続した波形整形用コ
ンデンサを備え、この高圧側巻線と波形整形用コンデン
サの並列回路にDC−DCコンバータを直列に接続した
り、特公平1−56637号公報や実開昭63−923
62号公報に開示されたように、昇圧トランスに別巻線
(三次巻線)を追加し、この別巻線の誘起電流を整流し
て直流出力を得る構成が一般的である。
A conventional high-voltage power source of this type is disclosed in, for example, Japanese Patent Publication No. 27422/1989 or Japanese Patent Laid-Open No. 27708/1990.
As described in Japanese Patent Publication No. 1, a waveform shaping capacitor connected in parallel with a high voltage side winding of a step-up transformer connected to a DC power source is provided, and a DC- DC converters can be connected in series, Japanese Examined Patent Publication No. 1-56637 or Japanese Utility Model Publication No. 63-923
As disclosed in Japanese Patent Laid-Open No. 62-62, it is general to add another winding (tertiary winding) to the step-up transformer and rectify the induced current in the other winding to obtain a DC output.

【0005】図5は直流成分を生成するためにDC−D
Cコンバータを用いた従来の交流重畳高圧直流電源装置
の構成説明図であって、1,11は直流電源、2は交流
用昇圧トランス、3は直流用昇圧トランス、41,4
2,43はスイッチング素子、5は波形整形用コンデン
サ、6は整流ダイオード、7は平滑コンデンサ、11は
制御回路、12はDC−DCコンータである。
FIG. 5 shows a DC-D for generating a DC component.
It is a structure explanatory view of the conventional AC superposition high voltage DC power supply device using a C converter, 1 and 11 are DC power supplies, 2 is a step-up transformer for AC, 3 is a step-up transformer for DC, 41 and 4
Reference numerals 2 and 43 are switching elements, 5 is a waveform shaping capacitor, 6 is a rectifying diode, 7 is a smoothing capacitor, 11 is a control circuit, and 12 is a DC-DC contour.

【0006】同図の構成において、直流電源1から昇圧
トランス2の一次巻線(低圧側巻線)21に供給される
直流は、制御回路11で交互にオン/オフ制御されるス
イッチング素子41,42によってチョッピングされ
る。これにより昇圧トランス2の二次巻線22には昇圧
された高圧交流が誘起される。波形整形用コンデンサ5
は、軽負荷時にこの高圧交流に生ずる振動項を抑制し、
波形整形する。
In the configuration shown in FIG. 1, the direct current supplied from the direct current power supply 1 to the primary winding (low-voltage side winding) 21 of the step-up transformer 2 is switched on / off by the control circuit 11 alternately. Chopped by 42. As a result, a boosted high voltage AC is induced in the secondary winding 22 of the boosting transformer 2. Waveform shaping capacitor 5
Suppresses the vibration term generated in this high-voltage AC at light load,
Shape the waveform.

【0007】一方、DC−DCコンバータ12は、上記
と同様に昇圧トランス3の一次巻線31に流れる直流電
源11からの直流を制御回路121によりオン/オフ制
御されるスイッチング素子43でチョッピングし、その
二次巻線32に略々矩形の高圧交流を誘起させる。二次
巻線32に誘起した高圧交流は整流ダイオード6と平滑
コンデンサ7からなる整流回路により直流に整流され
る。
On the other hand, the DC-DC converter 12 chops the direct current from the direct current power supply 11 flowing through the primary winding 31 of the step-up transformer 3 by the switching element 43 which is on / off controlled by the control circuit 121 in the same manner as described above. A substantially rectangular high-voltage alternating current is induced in the secondary winding 32. The high-voltage alternating current induced in the secondary winding 32 is rectified into a direct current by the rectifying circuit including the rectifying diode 6 and the smoothing capacitor 7.

【0008】このDC−DCコンバータ12は上記昇圧
トランス2の二次巻線22と波形整形コンデンサ5の並
列回路と直列に接続されていることで、出力にはDC−
DCコンバータ12で得られた直流に昇圧トランス2の
二次巻線22から得られた交流が重畳した直流重畳交流
高電圧が出力される。図6は交流用の昇圧トランスに三
次巻線を設けて直流分を得るようにした従来の直流重畳
交流高圧電源装置の構成説明図であって、図5と同様
に、1は直流電源、2は交流用昇圧トランス、21は昇
圧トランスの一次巻線、22は同二次巻線、33は同三
次巻線、41,42はスイッチング素子、5は波形整形
用コンデンサ、6は整流ダイオード、7は平滑コンデン
サ、8は整流抵抗、11は制御回路である。
The DC-DC converter 12 is connected in series with the parallel circuit of the secondary winding 22 of the step-up transformer 2 and the waveform shaping capacitor 5, so that the output is DC-DC.
A DC superimposed AC high voltage in which the AC obtained from the secondary winding 22 of the step-up transformer 2 is superimposed on the DC obtained from the DC converter 12 is output. FIG. 6 is a configuration explanatory view of a conventional DC superposed AC high-voltage power supply device in which a tertiary winding is provided in an AC step-up transformer to obtain a DC component. As in FIG. Is a step-up transformer for AC, 21 is a primary winding of the step-up transformer, 22 is a secondary winding thereof, 33 is a tertiary winding thereof, 41 and 42 are switching elements, 5 is a waveform shaping capacitor, 6 is a rectifying diode, 7 Is a smoothing capacitor, 8 is a rectifying resistor, and 11 is a control circuit.

【0009】同図の構成において、直流電源1から昇圧
トランス2の一次巻線(低圧側巻線)21に供給される
直流は、制御回路11で交互にオン/オフ制御されるス
イッチング素子41,42によってチョッピングされ
る。これにより昇圧トランス2の二次巻線22に昇圧さ
れた高圧交流が誘起される。波形整形用コンデンサ5
は、軽負荷時にこの高圧交流に生ずる振動項を抑制し波
形整形する。
In the configuration shown in FIG. 1, the direct current supplied from the direct current power supply 1 to the primary winding (low-voltage side winding) 21 of the step-up transformer 2 is switched on / off by the control circuit 11 alternately. Chopped by 42. As a result, the boosted high-voltage AC is induced in the secondary winding 22 of the step-up transformer 2. Waveform shaping capacitor 5
Suppresses the vibration term generated in this high-voltage AC at light load and shapes the waveform.

【0010】一方、昇圧トランス2の三次巻線33には
整流ダイオード6と平滑コンデンサ7および平滑抵抗8
からなる整流回路が接続されており、この整流回路の直
流出力は上記昇圧トランス2の二次巻線22と整形コン
デンサ5の並列回路に直列に接続されている。したがっ
て、出力には昇圧トランス2の二次巻線22に得られる
交流高圧が三次巻線33で得られる直流高圧に重畳した
直流重畳交流高電圧が出力される。
On the other hand, on the tertiary winding 33 of the step-up transformer 2, a rectifying diode 6, a smoothing capacitor 7 and a smoothing resistor 8 are provided.
Is connected to the DC output of the rectifier circuit and is connected in series to the parallel circuit of the secondary winding 22 of the step-up transformer 2 and the shaping capacitor 5. Therefore, a DC superimposed AC high voltage in which the AC high voltage obtained in the secondary winding 22 of the step-up transformer 2 is superimposed on the DC high voltage obtained in the tertiary winding 33 is output as the output.

【0011】[0011]

【発明が解決しようとする課題】上記従来技術において
は、直流成分を作成するためにDC−DCコンバータや
昇圧トランスに三次巻線を設けるなどで構成が複雑とな
り、適用機器における占有スペースが大きくなる等の問
題があり、コスト高になるという問題があった。本発明
の目的は、上記従来技術の諸問題を解消して簡単な構成
により直流成分を発生させる直流重畳交流高圧電源装置
や、交流高圧出力とは別出力の直流出力を提供すること
にある。
In the above prior art, the structure is complicated by providing a tertiary winding in a DC-DC converter or a step-up transformer in order to create a DC component, and the space occupied by the applied equipment is increased. However, there is a problem that the cost becomes high. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and provide a DC superimposed AC high-voltage power supply device that generates a DC component with a simple configuration, and a DC output that is an output different from the AC high-voltage output.

【0012】[0012]

【課題を解決するための手段】上記目的を達成するた
め、本発明は波形整形用コンデンサ(5)に流れる無効
電流の一部を利用することで、上記波形整形用コンデン
サ(5)の波形整形の機能を損なうことなく直流成分を
得ることを特徴とし、直流電源(1)に接続した昇圧ト
ランス(2)と、昇圧トランス(2)の低圧側巻線に接
続したスイッチング素子(41,42)と、このスイッ
チング素子(41,42)のオン/オフを制御する制御
回路(11)と、昇圧トランス(2)の高圧側巻線(2
2)に並列接続した波形整形用のコンデンサ(5)と、
前記波形整形用コンデンサ(5)に直列に挿入した整流
回路(60)とから構成したことを特徴とするものであ
る。
In order to achieve the above object, the present invention utilizes a part of the reactive current flowing in the waveform shaping capacitor (5) to shape the waveform of the waveform shaping capacitor (5). A DC component is obtained without impairing the function of the step-up transformer (2) connected to the DC power source (1) and a switching element (41, 42) connected to the low-voltage side winding of the step-up transformer (2). A control circuit (11) for controlling on / off of the switching elements (41, 42), and a high voltage side winding (2) of the step-up transformer (2).
A capacitor (5) for waveform shaping connected in parallel to 2),
The rectifying circuit (60) is inserted in series with the waveform shaping capacitor (5).

【0013】すなわち、本発明は、直流電源(1)に接
続したリーケージトランス等の昇圧トランス(2)と、
昇圧トランス(2)の低圧側巻線(一次巻線21)にそ
れぞれ接続されて交互にオン/オフされするスイッチン
グ素子(41,42)と、このスイッチング素子(4
1,42)のオン/オフを制御する制御回路(11)
と、昇圧トランス(2)の高圧側巻線(二次巻線22)
の一方の端子に一端を接続した波形整形用コンデンサ
(5)と、一方の電極を前記波形整形用コンデンサ
(5)の他端に接続した第1の整流ダイオード(61)
と、前記波形整形用コンデンサ(5)と前記第1の整流
ダイオード(61)の接続点に前記第1のダイオードに
対して一方の電極を順方向に接続した第2の整流ダイオ
ード(62)と、前記第2の整流ダイオード(62)の
他方の電極と前記第1の整流ダイオード(61)の他方
の電極の端子間に接続した抵抗(8)と平滑コンデンサ
(7)の並列回路とから構成したことを特徴とする。
That is, the present invention comprises a step-up transformer (2) such as a leakage transformer connected to a DC power source (1),
Switching elements (41, 42) connected to the low-voltage side winding (primary winding 21) of the step-up transformer (2) and turned on / off alternately, and this switching element (4)
Control circuit (11) for controlling on / off of (1, 42)
And the high voltage side winding (secondary winding 22) of the step-up transformer (2)
A waveform shaping capacitor (5) having one end connected to one terminal, and a first rectifying diode (61) having one electrode connected to the other end of the waveform shaping capacitor (5)
And a second rectifying diode (62) having one electrode connected in the forward direction to the first diode at a connection point between the waveform shaping capacitor (5) and the first rectifying diode (61). A resistor (8) connected between the other electrode of the second rectifying diode (62) and the other electrode of the first rectifying diode (61), and a parallel circuit of a smoothing capacitor (7). It is characterized by having done.

【0014】また、本発明は、前記整流回路(60)か
ら所要の直流出力を取り出す構成とすることも可能であ
り、波形整形用コンデンサとして複数の並列コンデンサ
(51,52)を用い、それぞれのコンデンサ毎に平滑
回路(60,60’)を設けて1または複数の直流出力
を得る構成とすることもできる。
Further, according to the present invention, a desired DC output can be taken out from the rectifier circuit (60), and a plurality of parallel capacitors (51, 52) are used as the waveform shaping capacitors, and each of them is used. It is also possible to provide a smoothing circuit (60, 60 ') for each capacitor to obtain one or more DC outputs.

【0015】[0015]

【作用】二次巻線(高圧側巻線)(22)に並列接続し
た波形整形用コンデンサ(5)は、昇圧トランス(2)
の一次巻線(低圧側巻線21)に流れる直流電流をオン
/オフすることにより二次巻線(22)に誘起する交流
高圧電圧を波形整形している。
The waveform shaping capacitor (5) connected in parallel to the secondary winding (high voltage side winding) (22) is a step-up transformer (2).
The AC high voltage induced in the secondary winding (22) is waveform-shaped by turning on / off the direct current flowing through the primary winding (low-voltage side winding 21).

【0016】この波形整形用コンデンサ(5)に接続し
た整流回路(60)は波形整形用コンデンサ(5)に流
れる交流電流を整流し、平滑して直流成分を発生する。
この整流回路により、交流出力のピーク・ピーク値に対
して充分に小さい範囲で直流成分を発生することで、波
形整形用コンデンサに流れる無効電流に影響を与えない
ため、波形整形の機能を損なうことがなく、簡単な構成
で直流成分を得ることができ、また上記整流回路から所
要の直流出力を得ることができる。
The rectifying circuit (60) connected to the waveform shaping capacitor (5) rectifies the AC current flowing in the waveform shaping capacitor (5) and smoothes it to generate a DC component.
This rectifier circuit does not affect the reactive current flowing in the waveform shaping capacitor by generating a DC component in a range that is sufficiently smaller than the peak-peak value of the AC output, thus impairing the waveform shaping function. In addition, a DC component can be obtained with a simple configuration, and a required DC output can be obtained from the rectifier circuit.

【0017】[0017]

【実施例】以下、本発明の実施例につき、図面を参照し
て詳細に説明する。図1は本発明による高圧電源装置の
一実施例を説明する回路構成図であって、1は直流電
源、2は交流用昇圧トランス、21は交流用昇圧トラン
スの一次巻線(低圧側巻線)、22は同二次巻線(高圧
用巻線)、41,42はスイッチング素子であるスイッ
チングトランジスタ、5は波形整形用コンデンサ、6
1,62は整流ダイオード、7は平滑用コンデンサ、8
は整流抵抗、11はスイッチングトランジスタをオン/
オフ制御する制御回路である。
Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a circuit configuration diagram for explaining an embodiment of a high voltage power supply device according to the present invention, in which 1 is a DC power source, 2 is an AC step-up transformer, and 21 is an AC step-up transformer primary winding (low-voltage side winding). ), 22 is the same secondary winding (high voltage winding), 41 and 42 are switching transistors as switching elements, 5 is a waveform shaping capacitor, 6
1, 62 are rectifying diodes, 7 is a smoothing capacitor, 8
Is a rectifying resistor, 11 is a switching transistor ON /
It is a control circuit for performing off control.

【0018】同図の構成において、直流電源1から交流
用昇圧トランス2の一次巻線21に供給される直流は、
制御回路11により交互にオン/オフ制御されるスイッ
チング素子41,42によって所定の周期で交互にチョ
ッピングされる。これにより交流用昇圧トランス2の二
次巻線22に昇圧された交番高圧電圧が誘起される。波
形整形用コンデンサ5は、ローパスフィルタとして機能
し、軽負荷時に上記高圧交流に生ずる振動項を抑制し、
波形整形する。
In the configuration shown in FIG. 1, the direct current supplied from the direct current power supply 1 to the primary winding 21 of the alternating current step-up transformer 2 is
The switching elements 41 and 42, which are alternately turned on / off by the control circuit 11, are alternately chopped at a predetermined cycle. As a result, the boosted alternating high voltage is induced in the secondary winding 22 of the AC step-up transformer 2. The waveform shaping capacitor 5 functions as a low-pass filter and suppresses the vibration term generated in the high-voltage AC at a light load,
Shape the waveform.

【0019】二次巻線22と波形整形用コンデンサ5の
間には、整流ダイオード61,62、平滑用コンデンサ
7、抵抗8からなる整流回路が接続されており、波形整
形用コンデンサ5に流れる交流電流の一方は、整流ダ
イオード61と二次巻線22および波形整形用コンデン
サ5の直列回路を流れる。波形整形用コンデンサ5に流
れる交流電流の他方は、二次巻線22と波形整形用コ
ンデンサ5、平滑回路60の整流ダイオード62,平滑
用コンデンサ7と整流抵抗8の並列回路を通って流れ
る。
A rectifying circuit composed of rectifying diodes 61 and 62, a smoothing capacitor 7 and a resistor 8 is connected between the secondary winding 22 and the waveform shaping capacitor 5, and an alternating current flowing in the waveform shaping capacitor 5 is connected. One of the currents flows through the series circuit of the rectifying diode 61, the secondary winding 22, and the waveform shaping capacitor 5. The other of the alternating currents flowing through the waveform shaping capacitor 5 flows through the secondary winding 22, the waveform shaping capacitor 5, the rectifying diode 62 of the smoothing circuit 60, and the parallel circuit of the smoothing capacitor 7 and the rectifying resistor 8.

【0020】図2は図1の動作を説明する波形図であっ
て、各波形の符号は図1に同一符号を付した部分の波形
に相当する。図2の波形ア,イは制御回路11により制
御されるスイッチングトランジスタ41,42のオン/
オフによって昇圧トランス2の一次巻線21の各半分に
印加される電圧波形で、この印加電圧により一次巻線2
1に流れる電流の変化に応じて二次巻線22に交流電流
が誘起される。同図ウは整流用コンデンサ5で波形
整形された高圧交流電圧波形である。
FIG. 2 is a waveform diagram for explaining the operation of FIG. 1, and the reference numerals of the waveforms correspond to the waveforms of the portions with the same reference numerals in FIG. Waveforms A and B in FIG. 2 are ON / OFF states of the switching transistors 41 and 42 controlled by the control circuit 11.
The voltage waveform is applied to each half of the primary winding 21 of the step-up transformer 2 when the primary transformer 2 is turned off.
An alternating current is induced in the secondary winding 22 according to the change in the current flowing through the secondary winding 22. FIG. 5C shows a high-voltage AC voltage waveform whose waveform is shaped by the rectifying capacitor 5.

【0021】整流回路60は電流の電流について整
流,平滑を施し、整流ダイオード62の両端にエに示し
た波形の電圧変化を生じさせる。したがって、この波形
エの電圧変化を生じさせる電流が平滑コンデンサ7と抵
抗8からなる平滑回路で平滑され、図1のA点に波形オ
に示したような直流成分を発生させる。
The rectifying circuit 60 rectifies and smoothes the current, and causes a voltage change having a waveform shown in D at both ends of the rectifying diode 62. Therefore, the current that causes the voltage change of the waveform D is smoothed by the smoothing circuit composed of the smoothing capacitor 7 and the resistor 8, and the DC component as shown by the waveform E is generated at the point A in FIG.

【0022】これにより、出力に現れる電圧は、図2の
波形カに示したように、波形オで示した直流電圧成分が
波形ウに重畳した波形カに示した直流重畳交流電圧とな
る。図1において、A点の直流成分は(の平均電流)
×(整流抵抗8の抵抗値)となり、図2の波形ウのピー
ク・ピーク電圧をVP-P (V),その周波数をf(H
z),波形整形用コンデンサ5のキャパシタンスをC
(F),平滑コンデンサ7の端子間平均電圧をV
0 (V)とすると、の平均電流I0 (A)は、 I0 =f×C×(VP-P −V0 )・・・・・・・・・・・(式1) となる。
As a result, the voltage appearing at the output becomes the DC superimposed AC voltage shown in the waveform C in which the DC voltage component shown in the waveform E is superimposed in the waveform C, as shown in the waveform C in FIG. In Fig. 1, the DC component at point A is (average current of)
X (the resistance value of the rectifying resistor 8), the peak-peak voltage of the waveform C in FIG. 2 is V PP (V), and its frequency is f (H
z), the capacitance of the waveform shaping capacitor 5 is C
(F), the average voltage between the terminals of the smoothing capacitor 7 is V
When 0 (V) is set, the average current I 0 (A) of the above becomes I 0 = f × C × (V PP −V 0 ) ... (Equation 1).

【0023】この場合の平滑コンデンサ7の端子間平均
電圧V0 は、整流抵抗8の抵抗値をR(Ω)とすると、 V0 =f×C×R×VP-P ÷(f×C×R−1)・・・・(式2) となる。本実施例においては、平滑回路60を有しない
従来の状態((式1)において、V0 =0と同等)に近
い状態、すなわち、上記(式1)のV0 がVP-P に対し
て十分に小さい範囲で直流出力を発生させることで、波
形整形用コンデンサ5に流れる無効電流に影響を与えな
いため、波形整形の機能を損なうことがない。
The average voltage V 0 between the terminals of the smoothing capacitor 7 in this case is V 0 = f × C × R × V PP ÷ (f × C × R), where R (Ω) is the resistance value of the rectifying resistor 8. -1) ... (Equation 2) In the present embodiment, sufficient (in (Equation 1), V 0 = 0 equivalent) of a conventional no smoothing circuit 60 is close to the state, i.e., V 0 of the equation (1) is against the V PP By generating a DC output in a very small range, the reactive current flowing through the waveform shaping capacitor 5 is not affected, and therefore the waveform shaping function is not impaired.

【0024】仮に、V0 ≒VP-P のような直流出力を発
生させると、(式1)のI0 =0となり、波形整形コン
デンサに無効電流は流れなくなり、波形整形コンデンサ
は波形整形の機能を果たさなくなる。図3は本発明によ
る高圧電源装置の他の実施例を説明する回路構成図であ
って、図1と同一符号は同一部分に対応し、81,82
は整流抵抗、9は出力2の直流電圧を安定に制御するた
めの定電圧制御用トランジスタである。
If a DC output such as V 0 ≈V PP is generated, then I 0 = 0 in (Equation 1), no reactive current flows through the waveform shaping capacitor, and the waveform shaping capacitor has a waveform shaping function. It will not end. FIG. 3 is a circuit configuration diagram for explaining another embodiment of the high-voltage power supply device according to the present invention, in which the same reference numerals as those in FIG.
Is a rectifying resistor, and 9 is a constant voltage control transistor for controlling the DC voltage of the output 2 stably.

【0025】この実施例は、交流高圧出力として出力1
を得ると共に、整流回路60で得た直流電圧を別出力の
出力2として取り出すようにした構成例である。この実
施例によれば、直流重畳交流高圧電源から安定化された
所定の直流出力を得ることができる。図4は本発明によ
る高圧電源装置のさらに他の実施例を説明する回路構成
図であって、図1と同一符号は同一部分に対応し、5
1,52は波形整形用コンデンサ、60,60’は整
流,平滑回路、63,64は整流ダイオード、71,7
2は平滑コンデンサ、10,101は定電圧素子のツェ
ナーダイオードである。
In this embodiment, the output 1 is output as an AC high voltage output.
Is obtained, and the DC voltage obtained by the rectifier circuit 60 is taken out as the output 2 of another output. According to this embodiment, it is possible to obtain a stabilized predetermined DC output from the DC superimposed AC high voltage power supply. FIG. 4 is a circuit configuration diagram for explaining still another embodiment of the high voltage power supply device according to the present invention. The same reference numerals as those in FIG.
1, 52 are waveform shaping capacitors, 60, 60 'are rectifying / smoothing circuits, 63, 64 are rectifying diodes, 71, 7
Reference numeral 2 is a smoothing capacitor, and 10 and 101 are zener diodes of constant voltage elements.

【0026】本実施例は、前記図1あるいは図3におけ
る波形整形用コンデンサ5をコンデンサ51とコンデン
サ52の並列回路に分割して、整流回路60と整流回路
60’を備えさせたもので、それぞれの整流回路60,
60’から所要の直流出力を取り出す構成としたもので
ある。このように、本実施例によれば、交流高圧電源か
ら複数の直流出力を取り出すことが可能である。
In this embodiment, the waveform shaping capacitor 5 in FIG. 1 or 3 is divided into a parallel circuit of a capacitor 51 and a capacitor 52, and a rectifying circuit 60 and a rectifying circuit 60 'are provided, respectively. Rectifier circuit 60,
The configuration is such that a desired DC output is taken out from 60 '. Thus, according to this embodiment, it is possible to take out a plurality of DC outputs from the AC high-voltage power supply.

【0027】本発明は上記説明した各実施例の構成に限
定されるものでなく、また直流出力の極性,およびその
生成回路(整流平滑回路)の構成と具体的素子は任意で
ある。
The present invention is not limited to the configuration of each of the embodiments described above, and the polarity of the DC output, the configuration of the generating circuit (rectifying / smoothing circuit) and the specific elements are arbitrary.

【0028】[0028]

【発明の効果】以上説明したように、本発明によれば、
交流高圧電源の波形整形コンデンサに流れる無効電流の
一部を利用することで、波形整形用コンデンサの本来の
波形整形の機能を損なうことがなく、簡単な構成で直流
成分を得ることができる。
As described above, according to the present invention,
By utilizing a part of the reactive current flowing in the waveform shaping capacitor of the AC high-voltage power supply, it is possible to obtain the DC component with a simple configuration without impairing the original waveform shaping function of the waveform shaping capacitor.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明による高圧電源装置の一実施例を説明
する回路構成図である。
FIG. 1 is a circuit configuration diagram illustrating an embodiment of a high voltage power supply device according to the present invention.

【図2】 図1に示した本発明の実施例の動作を説明す
る波形図である。
FIG. 2 is a waveform diagram for explaining the operation of the embodiment of the present invention shown in FIG.

【図3】 本発明による高圧電源装置の他の実施例を説
明する回路構成図である。
FIG. 3 is a circuit configuration diagram illustrating another embodiment of the high voltage power supply device according to the present invention.

【図4】 本発明による高圧電源装置のさらに他の実施
例を説明する回路構成図である。
FIG. 4 is a circuit configuration diagram illustrating still another embodiment of the high voltage power supply device according to the present invention.

【図5】 DC−DCコンバータを用いた従来の交流重
畳高圧直流電源装置の構成説明図である。
FIG. 5 is a configuration explanatory view of a conventional AC superposed high voltage DC power supply device using a DC-DC converter.

【図6】 交流用の昇圧トランスに第三巻線を設けて直
流分を得るようにした従来の交流重畳直流高圧電源装置
の構成説明図である。
FIG. 6 is a configuration explanatory diagram of a conventional AC superposed DC high voltage power supply device in which a third winding is provided in an AC step-up transformer to obtain a DC component.

【符号の説明】[Explanation of symbols]

1・・・・直流電源、2・・・・交流用昇圧トランス、
21・・・・交流用昇圧トランスの一次巻線(低圧側巻
線)、22・・・・同二次巻線(高圧用巻線)、41,
42・・・・スイッチング素子であるスイッチングトラ
ンジスタ、5・・・・波形整形用コンデンサ、60・・
・・平滑回路、61,62・・・・整流ダイオード、7
・・・・平滑用コンデンサ、8・・・・抵抗、11・・
・・スイッチングトランジスタをオン/オフ制御する制
御回路。
1 ... DC power supply, 2 ... AC step-up transformer,
21 ...- Primary winding (low-voltage side winding) of AC step-up transformer, 22 ...- Secondary winding (high-voltage winding), 41,
42 ... Switching transistor which is a switching element, 5 ... Waveform shaping capacitor, 60 ...
.... Smoothing circuits, 61, 62, ... Rectifying diodes, 7
.... Smoothing capacitors, 8 ..., resistors, 11 ...
..Control circuit that controls on / off of switching transistors.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 直流電源に接続した昇圧トランスと、昇
圧トランスの低圧側巻線に接続して前記直流電源の供給
をオン/オフするスイッチング素子と、前記スイッチン
グ素子のオン/オフを制御する制御回路と、前記昇圧ト
ランスの高圧側巻線に並列接続して該高圧側巻線に誘起
する交番高圧電圧を整形する波形整形用コンデンサと、
前記波形整形用コンデンサに流れている交流電流を整
流,平滑して直流成分を発生する整流回路とから構成し
たことを特徴とする高圧電源装置。
1. A step-up transformer connected to a direct-current power supply, a switching element connected to a low-voltage side winding of the step-up transformer to turn on / off the supply of the direct-current power source, and control for controlling on / off of the switching element. A circuit, and a waveform shaping capacitor that is connected in parallel to the high voltage side winding of the step-up transformer to shape the alternating high voltage induced in the high voltage side winding,
A high-voltage power supply device comprising a rectifying circuit for rectifying and smoothing an alternating current flowing through the waveform shaping capacitor to generate a direct current component.
JP03219581A 1991-08-30 1991-08-30 High voltage power supply Expired - Fee Related JP3141435B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03219581A JP3141435B2 (en) 1991-08-30 1991-08-30 High voltage power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03219581A JP3141435B2 (en) 1991-08-30 1991-08-30 High voltage power supply

Publications (2)

Publication Number Publication Date
JPH0564442A true JPH0564442A (en) 1993-03-12
JP3141435B2 JP3141435B2 (en) 2001-03-05

Family

ID=16737775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03219581A Expired - Fee Related JP3141435B2 (en) 1991-08-30 1991-08-30 High voltage power supply

Country Status (1)

Country Link
JP (1) JP3141435B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11789400B2 (en) 2020-11-30 2023-10-17 Brother Kogyo Kabushiki Kaisha Image forming apparatus provided with high voltage power source

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11789400B2 (en) 2020-11-30 2023-10-17 Brother Kogyo Kabushiki Kaisha Image forming apparatus provided with high voltage power source

Also Published As

Publication number Publication date
JP3141435B2 (en) 2001-03-05

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