JPH0452213U - - Google Patents
Info
- Publication number
- JPH0452213U JPH0452213U JP9490990U JP9490990U JPH0452213U JP H0452213 U JPH0452213 U JP H0452213U JP 9490990 U JP9490990 U JP 9490990U JP 9490990 U JP9490990 U JP 9490990U JP H0452213 U JPH0452213 U JP H0452213U
- Authority
- JP
- Japan
- Prior art keywords
- switch element
- temperature
- power source
- heaters
- fixing roller
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 14
- 238000001514 detection method Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
第１図は本考案に係る電子写真装置用電源回路
図、第２図は力率改善回路の一例の回路図、第３
図は電流波形図でａ〜ｅは従来の例の波形を、ｆ
〜ｈは本考案の波形図、第４図及び第５図は入力
電流の波形図、第５図ａは電源投入後のヒータの
オンオフ制御の際の電流変化を、第６図ｂはその
際の温度変化を示す図、第７図は従来の複写機電
源回路図、第８図は整流平滑回路図、第９図は第
７図のオンオフ温度制御回路の一例の図、第１０
図は第９図による制御時の波形図でａはスイツチ
素子制御電流波形、ｂは温度変化を示す図、第１
１図は位相制御温度制御回路の一例の図、第１２
図は第１１図による制御時の波形図でａは鋸刃波
形、ｂは制御信号波形を示す図である。
１……力率改善回路、２……直流安定化回路、
３……負荷、４……温度検出手段、５……温度制
御回路、６，７……オンオフ駆動素子、８，９…
…スイツチ素子、１１，１２……ヒータ、１３…
…交流電源。
Fig. 1 is a power supply circuit diagram for an electrophotographic device according to the present invention, Fig. 2 is a circuit diagram of an example of a power factor correction circuit, and Fig. 3 is a circuit diagram of an example of a power factor correction circuit.
The figure is a current waveform diagram, a to e are the waveforms of the conventional example, f
-h are waveform diagrams of the present invention, Figures 4 and 5 are waveform diagrams of input current, Figure 5a is the current change during on/off control of the heater after power is turned on, and Figure 6b is the waveform diagram at that time. Figure 7 is a conventional copying machine power supply circuit diagram, Figure 8 is a rectification smoothing circuit diagram, Figure 9 is an example of the on/off temperature control circuit of Figure 7, and Figure 10 is a diagram showing temperature changes in Figure 7.
The figure is a waveform diagram during control according to Figure 9, where a is the switch element control current waveform, b is a diagram showing temperature changes, and
Figure 1 is a diagram of an example of a phase control temperature control circuit, Figure 12
The figure is a waveform diagram during the control shown in FIG. 11, where a shows the sawtooth waveform and b shows the control signal waveform. 1... Power factor correction circuit, 2... DC stabilization circuit,
3...Load, 4...Temperature detection means, 5...Temperature control circuit, 6, 7...On/off drive element, 8, 9...
...Switch element, 11, 12... Heater, 13...
…AC source.
Claims (1)
に直流電力を供給する直流安定化電源と、熱定着
ローラ内に組み込まれ前記交流電源と接続される
複数のヒータと、該ヒータの夫々と前記直流電源
との間に接続されるスイツチ素子と、前記熱定着
ローラの温度を検出する温度検出手段と、該温度
検出手段と前記スイツチ素子との間に接続され前
記温度検出手段による検出信号により前記スイツ
チ素子をオンオフ制御する温度制御回路とを有し
、該温度制御回路が前記熱定着ローラを目標温度
に近づけるよう前記複数のヒータのオンオフの組
合わせを演算する演算手段と、該演算手段の演算
結果より前記複数のスイツチ素子をオンオフする
手段とを包含することを特徴とする電子写真装置
用電源回路。 a DC stabilized power source that is connected to the AC power source via a power factor correction circuit and supplies DC power to a load; a plurality of heaters that are incorporated in a heat fixing roller and connected to the AC power source; and each of the heaters and the a switch element connected between a DC power source, a temperature detecting means for detecting the temperature of the heat fixing roller, and a switch element connected between the temperature detecting means and the switch element, which detects the a temperature control circuit for controlling on/off of a switch element, a calculation means for calculating a combination of on/off of the plurality of heaters so that the temperature control circuit brings the heat fixing roller close to a target temperature; A power supply circuit for an electrophotographic apparatus, comprising means for turning on and off the plurality of switch elements according to the result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9490990U JPH0452213U (en) | 1990-09-10 | 1990-09-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9490990U JPH0452213U (en) | 1990-09-10 | 1990-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452213U true JPH0452213U (en) | 1992-05-01 |
Family
ID=31833210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9490990U Pending JPH0452213U (en) | 1990-09-10 | 1990-09-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452213U (en) |
-
1990
- 1990-09-10 JP JP9490990U patent/JPH0452213U/ja active Pending
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