JPS6150310B2 - - Google Patents
Info
- Publication number
- JPS6150310B2 JPS6150310B2 JP54030749A JP3074979A JPS6150310B2 JP S6150310 B2 JPS6150310 B2 JP S6150310B2 JP 54030749 A JP54030749 A JP 54030749A JP 3074979 A JP3074979 A JP 3074979A JP S6150310 B2 JPS6150310 B2 JP S6150310B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- output
- power supply
- corona
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 230000008030 elimination Effects 0.000 claims description 11
- 238000003379 elimination reaction Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 238000009499 grossing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明は１個の昇圧トランスと制御回路によつ
て多数の複写プロセス用の帯電器のすべてに電力
を供給し、かつ環鏡変動、電源電圧変動に対して
安定な帯電器のコロナ電流を得られるようにした
複写機用高圧電源装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention supplies power to all chargers for a large number of copying processes using one step-up transformer and control circuit, and is stable against ring mirror fluctuations and power supply voltage fluctuations. The present invention relates to a high-voltage power supply device for a copying machine that can obtain a corona current for a charger.
従来の複写機用高圧電源装置は第１図に示すよ
うに構成されていた。 A conventional high-voltage power supply device for a copying machine is constructed as shown in FIG.
すなわち、電子複写機用感光ドラム１の周囲に
は帯電用コロナ放電器２、転写用コロナ放電器
３、分離用コロナ放電器４、除電用コロナ放電器
５が配置され、この４個のコロナ放電器２〜５に
はそれぞれ高圧電源ユニツトが接続されている。 That is, a charging corona discharger 2, a transfer corona discharger 3, a separation corona discharger 4, and a static elimination corona discharger 5 are arranged around the photosensitive drum 1 for an electronic copying machine. A high voltage power supply unit is connected to each of the electric appliances 2 to 5.
この帯電用と転写用の高圧電源ユニツトは交流
電圧発生回路６を一次側に接続した昇圧トランス
７の二次側には整流用ダイオード８、平滑用コン
デンサ９、抵抗１０よりなる整流回路が接続さ
れ、この整流回路の出力側の一端はコロナ放電器
に接続され、他端には出力電流を検出する電流検
出回路１１が接続され、この電流検出回路１１の
検出出力は基準電圧電源１２の基準電圧と比較器
１３で比較され、その差電圧を増幅する誤差増幅
器１４で増幅し、この出力を交流電圧発生回路６
に印加して交流電圧発生回路６の出力をコントロ
ールするよう構成されていた。なお、分離用と除
電用の電源ユニツトは上述の構成から整流回路を
除いた構成となつている。 In this high-voltage power supply unit for charging and transfer, a rectifier circuit consisting of a rectifier diode 8, a smoothing capacitor 9, and a resistor 10 is connected to the secondary side of a step-up transformer 7, which has an AC voltage generating circuit 6 connected to its primary side. , one end of the output side of this rectifier circuit is connected to the corona discharger, and the other end is connected to a current detection circuit 11 that detects the output current, and the detected output of this current detection circuit 11 is the reference voltage of the reference voltage power supply 12. is compared with the comparator 13, the difference voltage is amplified by the error amplifier 14, and this output is sent to the AC voltage generation circuit 6.
was applied to control the output of the alternating current voltage generating circuit 6. It should be noted that the power supply units for separation and static elimination have the configuration described above except that the rectifier circuit is removed.
このような構成においては個々のコロナ放電器
２〜５に対して全てに高圧電源ユニツトが別々に
必要となるため、きわめて多くの昇圧トランスや
制御回路が必要となつてコストが著しく高くつく
とともに、大型化するといつた欠点があつた。 In such a configuration, separate high-voltage power supply units are required for each of the corona dischargers 2 to 5, which requires an extremely large number of step-up transformers and control circuits, which significantly increases costs. As it became larger, it came with certain drawbacks.
しかも、このように個々に独立した高圧電源ユ
ニツトを用いているため環境変動や電源電圧変動
に対してコロナ放電が一定になりにくく安定した
複写プロセスを得ることができなくなつたり、相
互干渉によるビート妨害が発生したりする性能面
での欠点もあつた。 Furthermore, since individual high-voltage power supply units are used in this way, corona discharge becomes difficult to stabilize due to environmental changes and power supply voltage fluctuations, making it impossible to obtain a stable copying process, and beats due to mutual interference. There were also performance drawbacks such as interference.
本発明は以上のような従来の欠点を除去するも
のである。 The present invention eliminates the drawbacks of the prior art as described above.
以下本発明の実施例を図面第２図〜第８図によ
り説明する。 Embodiments of the present invention will be described below with reference to FIGS. 2 to 8 of the drawings.
まず、第２図において、１５は複写機の感光ド
ラムであり、この感光ドラム１５の周囲には帯電
用コロナ放電器１６、現像ユニツト１７、転写用
コロナ放電器１８、分離用コロナ放電器１９、複
写用紙２０、除電用コロナ放電器２１が配置され
ている。 First, in FIG. 2, 15 is a photosensitive drum of a copying machine, and around this photosensitive drum 15 are a charging corona discharger 16, a developing unit 17, a transfer corona discharger 18, a separation corona discharger 19, Copy paper 20 and a corona discharger 21 for static elimination are arranged.
２２は昇圧トランスで、この昇圧トランス２２
の一次巻線W1には交流電圧発生回路２３が接続
され、出力側には２つの高圧出力巻線W2，W3が
設けられ、この一方の高圧出力巻線W2には整流
用ダイオード２４、平滑用コンデンサ２５、抵抗
２６よりなる整流回路が接続され、この整流回路
の出力の高圧側は帯電用コロナ放電器１６に接続
され、低圧側は電流検出回路２７が接続され、こ
の電流検出回路２７の検出電圧は基準電圧電源２
８の基準電圧と比較器２９で比較され、その誤差
を誤差増幅器３０で増幅し、その出力で交流電圧
発出回路２３を制御する。 22 is a step-up transformer, and this step-up transformer 22
An AC voltage generation circuit 23 is connected to the primary winding W 1 , and two high voltage output windings W 2 and W 3 are provided on the output side, one of which is a rectifier diode. 24, a rectifier circuit consisting of a smoothing capacitor 25 and a resistor 26 is connected, the high voltage side of the output of this rectifier circuit is connected to the charging corona discharger 16, and the low voltage side is connected to a current detection circuit 27, which detects this current. The detection voltage of the circuit 27 is the reference voltage power supply 2.
It is compared with the reference voltage of No. 8 by a comparator 29, the error is amplified by an error amplifier 30, and the AC voltage generation circuit 23 is controlled by its output.
また、他方の高圧出力巻線W3には２個の中間
タツプT1，T2が設けられ、巻始め側の中間タツ
プT1には整流用ダイオード３１、平滑用コンデ
ンサ３２、抵抗３３よりなる整流回路が接続さ
れ、この整流回路の出力の高圧側は転写用コロナ
放電器１８に接続され、低圧側はアースされてい
る。さらに、中間タツプT2はそのまま除電用コ
ロナ放電器２１に接続され、巻終り側は分離用コ
ロナ放電器１９に接続されている。 The other high-voltage output winding W 3 is provided with two intermediate taps T 1 and T 2 , and the intermediate tap T 1 on the winding start side is composed of a rectifying diode 31 , a smoothing capacitor 32 , and a resistor 33 . A rectifier circuit is connected, the high voltage side of the output of this rectifier circuit is connected to the transfer corona discharger 18, and the low voltage side is grounded. Further, the intermediate tap T 2 is directly connected to the static eliminating corona discharger 21, and the winding end side is connected to the separation corona discharger 19.
一般にコロナ放電器の電圧電流特性は環境変
動、特に湿度によつて著しく変化する。つまり、
インピーダンスが大きく変動することになる。 In general, the voltage-current characteristics of a corona discharger change significantly due to environmental changes, especially humidity. In other words,
The impedance will fluctuate greatly.
しかし、環境変動は帯電用、転写用、分離用、
除電用コロナ放電器に同時に影響するため、コロ
ナ放電器の放電距離を考慮することにより環境変
動に対して全てのコロナ放電器のインピーダンス
を同じ方向にほぼ同じ割合で平行移動させること
ができる。 However, environmental fluctuations may affect charging, transfer, separation, etc.
Since this affects the charge eliminating corona dischargers at the same time, by considering the discharge distance of the corona dischargers, the impedance of all the corona dischargers can be translated in the same direction at approximately the same rate in response to environmental changes.
また、入力変動に対しては帯電用のコロナ電流
は一定であるため、本発明の高圧出力巻線W2，
W3に発生する出力電圧は一定となり、転写用、
分離用、除電用のコロナ電流も一定となる。 In addition, since the corona current for charging is constant with respect to input fluctuations, the high voltage output winding W 2 of the present invention
The output voltage generated at W 3 is constant, and is used for transfer,
The corona currents for separation and static elimination are also constant.
還境変動に対しては、たとえば湿度が上つて放
電電圧が上昇した場合、帯電用のコロナ電流は一
定となるように制御されているため、高圧出力巻
線W2に発生する出力電圧が上昇し、同じ磁気回
路中に設けられた高圧出力巻線W3の電圧も上昇
する。 Regarding environmental fluctuations, for example, if the discharge voltage increases due to rising humidity, the corona current for charging is controlled to remain constant, so the output voltage generated in the high-voltage output winding W2 will increase. However, the voltage of the high voltage output winding W3 provided in the same magnetic circuit also increases.
この場合、転写用、分離用、除電用の放電電圧
も上昇するので転写用、分離用、除電用のコロナ
電流は湿度が上昇する前の状態とほぼ同じとな
る。 In this case, since the discharge voltages for transfer, separation, and static elimination also increase, the corona currents for transfer, separation, and static elimination become almost the same as before the humidity increased.
また、この逆の環状変動に対しても上述と逆の
制御が行なわれ、環境変動、電源電圧変動に対し
て全てのコロナ電流を安定化することができる。 In addition, the opposite control to that described above is performed for the opposite annular fluctuation, and all corona currents can be stabilized against environmental fluctuations and power supply voltage fluctuations.
第３図〜第７図は上記基本構成の実施例に代る
他の実施例であり、第３図は電流検出回路２７と
して電流検出抵抗３４とノイズカツト用フイルタ
コンデンサ３５の並列回路を採用し、オペアンプ
４４の出力をシリーズレギユレータ３６に印加
し、スイツチング回路３７と発振器３８によつて
シリーズレギユレータ方式のインバータで交流電
圧発生回路２３を構成したものである。 3 to 7 show other embodiments in place of the embodiment with the basic configuration described above, and FIG. 3 employs a parallel circuit of a current detection resistor 34 and a noise-cutting filter capacitor 35 as the current detection circuit 27, The output of the operational amplifier 44 is applied to the series regulator 36, and the switching circuit 37 and the oscillator 38 constitute the alternating current voltage generating circuit 23 using a series regulator type inverter.
また、第４図は交流電圧発生回路２３としてス
イツチング回路３７、発振器３８とパルス幅変調
器３９によるパルス幅変調方式のインバータを用
いた例である。 Further, FIG. 4 shows an example in which a pulse width modulation type inverter using a switching circuit 37, an oscillator 38, and a pulse width modulator 39 is used as the AC voltage generation circuit 23.
第５図は交流電圧発生回路２３として、プリツ
ジダイオード４０、フオトカプラー４１、シリー
ズレギユレータ３６による商用電源入力のシリー
ズレギレータ方式とした例である。 FIG. 5 shows an example in which the AC voltage generating circuit 23 is of a series regulator type using a commercial power input using a prism diode 40, a photocoupler 41, and a series regulator 36.
第６図はシヤントレギユレータ４２を用い、リ
ーケージトランスを使用した商用電源入力のシヤ
ントレギユレータ方式の交流電圧発生回路２３と
したものである。 FIG. 6 shows a shunt regulator type AC voltage generating circuit 23 using a shunt regulator 42 and inputting a commercial power supply using a leakage transformer.
第７図は除電用のコロナ電流を検出し負帰還ル
ープを構成した実施例で、４３は帯電用と転写用
のコロナ放電器１６，１８に印加する電圧が必ず
しも等しくないため、オフセツト分を補正するた
めのドロツプ抵抗であり、この構成にすれば整流
回路が１個となり、回路構成がより簡素化でき
る。 Fig. 7 shows an embodiment in which a negative feedback loop is constructed by detecting a corona current for static elimination, and 43 is a correction for offset since the voltages applied to the corona dischargers 16 and 18 for charging and transfer are not necessarily equal. With this configuration, only one rectifier circuit is required, and the circuit configuration can be further simplified.
また、第８図は交流出力波形の一例を示したも
のである。 Moreover, FIG. 8 shows an example of an AC output waveform.
以上のように本発明の複写機用高圧電源装置は
構成されるため、印加タイミングが全て同一であ
ればほぼ高圧電源装置の価格をほぼ同機能をもた
せて約1/4近くにすることができる。これは昇圧
トランスが１個となり、制御回路も１個で済むこ
とによる効果であり、さらに、小形化、軽量化の
効果も得られる。 Since the high-voltage power supply device for a copying machine of the present invention is configured as described above, if the application timings are all the same, the price of the high-voltage power supply device can be reduced to about 1/4 with almost the same functions. . This is an effect due to the fact that only one step-up transformer and one control circuit are required, and furthermore, the effect of miniaturization and weight reduction can be obtained.
さらに、１個の昇圧トランスで駆動しているた
め、分離、除電用の出力電圧が同位相となるた
め、その間の絶縁構造が簡単となり、また、イン
バータ方式の場合、発振周波数が同一であるた
め、相互干渉によるビート妨害も全くなくなり、
１個の昇圧トランスから全ての出力を取出してい
るため負の直流出力を得た分だけ交流出力の波形
が第８図に示すように負のピーク値が抑えられて
しまい、コロナ電流は負極性の方がインピーダン
スが低いため正負のバランスのとれたコロナ電流
を得ることができ、分離、除電機能に対して非常
に良い結果を得ることができるなどの数多くの利
点をもち、工業的価値の大なるものである。 Furthermore, since it is driven by a single step-up transformer, the output voltages for isolation and static elimination are in the same phase, which simplifies the insulation structure between them.In addition, in the case of an inverter method, the oscillation frequency is the same, so , there is no beat disturbance due to mutual interference,
Since all the output is taken out from one step-up transformer, the negative peak value of the AC output waveform is suppressed by the negative DC output as shown in Figure 8, and the corona current has a negative polarity. has many advantages, such as a well-balanced corona current between positive and negative polarities due to its lower impedance, and very good results for separation and static elimination functions. It is what it is.
第１図は従来の複写機用高圧電源装置を示す電
気的回路図、第２図は本発明の複写機用高圧電源
装置の一実施例を示す電気的回路図、第３図〜第
７図は他の実施例を示す要部の電気的回路図、第
８図は同装置の交流出力波形図である。
１５……感光ドラム、１６……帯電用コロナ放
電器、１７……現像ユニツト、１８……転写用コ
ロナ放電器、１９……分離用コロナ放電器、２０
……複写用紙、２１……除電用コロナ放電器、２
２……昇圧トランス、W1……一次巻線、W2，W3
……高圧出力巻線、２３……交流電圧発生回路、
２４……整流用ダイオード、２５……平滑用コン
デンサ、２６……抵抗、２７……出力電流検出回
路、２８……基準電圧電源、２９……比較器、３
０……誤差増幅器、３１……整流用ダイオード、
３２……平滑用コンデンサ、３３……抵抗、３４
……電流検出抵抗、３５……フイルタコンデン
サ、３６……シリーズレギユレータ、３７……ス
イツチング回路、３８……発振器、３９……パル
ス増幅変調器、４０……ブリツジダイオード、４
１……フオトカプラー、４２……シヤントレギユ
レータ、４３……ドロツプ抵抗、４４……オペア
ンプ。
FIG. 1 is an electrical circuit diagram showing a conventional high-voltage power supply device for a copying machine, FIG. 2 is an electrical circuit diagram showing an embodiment of the high-voltage power supply device for a copying machine according to the present invention, and FIGS. 3 to 7 8 is an electrical circuit diagram of a main part showing another embodiment, and FIG. 8 is an AC output waveform diagram of the same device. 15...Photosensitive drum, 16...Corona discharger for charging, 17...Developing unit, 18...Corona discharger for transfer, 19...Corona discharger for separation, 20
... Copy paper, 21 ... Corona discharger for static elimination, 2
2...Step-up transformer, W1 ...Primary winding, W2 , W3
...High voltage output winding, 23...AC voltage generation circuit,
24... Rectifier diode, 25... Smoothing capacitor, 26... Resistor, 27... Output current detection circuit, 28... Reference voltage power supply, 29... Comparator, 3
0...Error amplifier, 31...Rectifier diode,
32... Smoothing capacitor, 33... Resistor, 34
... Current detection resistor, 35 ... Filter capacitor, 36 ... Series regulator, 37 ... Switching circuit, 38 ... Oscillator, 39 ... Pulse amplification modulator, 40 ... Bridge diode, 4
1... Photocoupler, 42... Shunt regulator, 43... Drop resistor, 44... Operational amplifier.
Claims (1)
を用いて、帯電用、転写用、分離用、さらには除
電用のコロナ放電器に高電圧を印加する複写機用
高圧電源装置において、昇圧トランスに高圧出力
巻線を少なくとも２個設け、この一方の高圧出力
巻線に整流回路を接続し、その出力の高圧側を帯
電用コロナ放電器に接続し、上記高圧出力巻線の
いずれか一方に電流検出回路を設け、この電流検
出回路の検出信号を昇圧トランスの入力側に帰還
させ、上記２個の高圧出力巻線の出力を他のコロ
ナ放電器に印加するように構成したことを特徴と
する複写機用高圧電源装置。1. In a high-voltage power supply device for a copying machine that uses a step-up transformer that inputs an AC voltage generating circuit to apply high voltage to a corona discharger for charging, transfer, separation, and static elimination, high voltage is applied to the step-up transformer. At least two output windings are provided, a rectifier circuit is connected to one of the high voltage output windings, the high voltage side of the output is connected to a charging corona discharger, and a current detection circuit is connected to one of the high voltage output windings. A copy characterized in that a circuit is provided, the detection signal of the current detection circuit is fed back to the input side of the step-up transformer, and the output of the two high-voltage output windings is applied to another corona discharger. High voltage power supply for machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3074979A JPS55122379A (en) | 1979-03-15 | 1979-03-15 | High voltage power supply for copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3074979A JPS55122379A (en) | 1979-03-15 | 1979-03-15 | High voltage power supply for copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55122379A JPS55122379A (en) | 1980-09-20 |
| JPS6150310B2 true JPS6150310B2 (en) | 1986-11-04 |
Family
ID=12312324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3074979A Granted JPS55122379A (en) | 1979-03-15 | 1979-03-15 | High voltage power supply for copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55122379A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026374A (en) * | 1983-07-22 | 1985-02-09 | Canon Inc | Power feeding system of electrifier |
| JPS6026363A (en) * | 1983-07-22 | 1985-02-09 | Canon Inc | Power feeding system of electrostatic charger |
| JPS6147971A (en) * | 1984-08-16 | 1986-03-08 | Canon Inc | Power source device for image forming device |
| JPS6147972A (en) * | 1984-08-16 | 1986-03-08 | Canon Inc | Power source device for image forming device |
| JPS63131158A (en) * | 1986-11-21 | 1988-06-03 | Mita Ind Co Ltd | Electrostatic discharging performing device |
| JPH01147557A (en) * | 1987-12-04 | 1989-06-09 | Canon Inc | Image forming device |
| JPH03279973A (en) * | 1990-03-28 | 1991-12-11 | Murata Mfg Co Ltd | High voltage power source circuit for electrostatic charger |
| JPH04171463A (en) * | 1990-11-02 | 1992-06-18 | Murata Mfg Co Ltd | High voltage power circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4728688U (en) * | 1971-04-24 | 1972-12-01 | ||
| JPS519459A (en) * | 1974-06-11 | 1976-01-26 | Xerox Corp | Seidenfukushaki |
| JPS545444A (en) * | 1977-06-09 | 1979-01-16 | Xerox Corp | Electric power adjusting apparatus for crotoron of xerographic copier |
-
1979
- 1979-03-15 JP JP3074979A patent/JPS55122379A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4728688U (en) * | 1971-04-24 | 1972-12-01 | ||
| JPS519459A (en) * | 1974-06-11 | 1976-01-26 | Xerox Corp | Seidenfukushaki |
| JPS545444A (en) * | 1977-06-09 | 1979-01-16 | Xerox Corp | Electric power adjusting apparatus for crotoron of xerographic copier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55122379A (en) | 1980-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6150310B2 (en) | ||
| US4930063A (en) | Variable resonance regulator for power supply | |
| JPS6049906B2 (en) | High voltage power supply for copying machines | |
| JPH10127051A (en) | Piezoelectric transformer dc power supply | |
| JPS6327208Y2 (en) | ||
| JPS62163569A (en) | Charging circuit for energy storing capacitor | |
| JPH02299467A (en) | Positive and negative output power supply circuits | |
| JPS6412181B2 (en) | ||
| JP2856510B2 (en) | High voltage stabilized power supply | |
| JP3141435B2 (en) | High voltage power supply | |
| JPS6155978A (en) | Power supply device | |
| JPH01216369A (en) | Image forming device | |
| JP2802121B2 (en) | Power supply | |
| JPH084385B2 (en) | Multi-output power supply circuit | |
| JPH0783594B2 (en) | Multi-output power supply circuit | |
| JPH082179B2 (en) | Positive and negative output power supply circuit | |
| JP4639437B2 (en) | High voltage power supply | |
| JPS5890868A (en) | Power source circuit and power source supplying method | |
| JPH0156637B2 (en) | ||
| JPS63121471A (en) | Constant-current and high-tension power source | |
| JPS6335983B2 (en) | ||
| JPH02100069A (en) | Image forming device | |
| JPS5833729A (en) | Ac high voltage power supply | |
| JPH01103447A (en) | Image forming device | |
| JPH0650934B2 (en) | Power supply |