JPH0176182U - - Google Patents
Info
- Publication number
- JPH0176182U JPH0176182U JP1987171522U JP17152287U JPH0176182U JP H0176182 U JPH0176182 U JP H0176182U JP 1987171522 U JP1987171522 U JP 1987171522U JP 17152287 U JP17152287 U JP 17152287U JP H0176182 U JPH0176182 U JP H0176182U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- signal
- reference signal
- threshold value
- control device
- 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 4
Landscapes
- Power Conversion In General (AREA)
- Fixing For Electrophotography (AREA)
Description
第１図は本考案に係る画像形成装置におけるヒ
ータの電力制御装置の一実施例を示す概略構成図
、第２図は本実施例で使用したヒータの電力制御
装置の動作を説明するためのタイムチヤート、第
３図はヒータの所定温度に対する立上り時間とヒ
ータ温度との関係を表わしたグラフ、第４図は第
１図で示したヒータの電力制御装置の応用例を示
した概略図、第５図は本考案に係る画像形成装置
におけるヒータの電力制御装置の他の実施例を示
す概略構成図、第６図は第５図で示した実施例の
動作を説明するためのタイムチヤートである。
２…ヒータ、３…トライアツク、４…ノコギリ
波発生回路、５…しきい値設定回路、６…比較回
路、７…電源。
FIG. 1 is a schematic configuration diagram showing an embodiment of a heater power control device in an image forming apparatus according to the present invention, and FIG. 2 is a time diagram for explaining the operation of the heater power control device used in this embodiment. Chart, Fig. 3 is a graph showing the relationship between the rise time and heater temperature for a given temperature of the heater, Fig. 4 is a schematic diagram showing an application example of the heater power control device shown in Fig. 1, and Fig. 5 The figure is a schematic configuration diagram showing another embodiment of the heater power control device in the image forming apparatus according to the present invention, and FIG. 6 is a time chart for explaining the operation of the embodiment shown in FIG. 5. 2... Heater, 3... Triack, 4... Sawtooth wave generation circuit, 5... Threshold setting circuit, 6... Comparison circuit, 7... Power supply.
Claims (1)
を有する画像形成装置におけるヒータの電力制御
装置において、 所定電圧の基準信号を発生する信号発生手段と
、 前記基準信号に対するしきい値を設定するしき
い値設定手段と、 前記基準信号と前記しきい値とを比較して、こ
のしきい値の値に対応するデユーテイー比でオン
オフ信号を形成する比較手段と を具え、前記オンオフ信号によつて、前記スイツ
チ素子を開閉し、前記電源からヒータへ供給され
る電力を制御することを特徴とする画像形成装置
におけるヒータの電力制御装置。 (2) 前記基準信号は、三角波状信号としたこと
を特徴とする実用新案登録請求の範囲第(1)項記
載の画像形成装置におけるヒータの電力制御装置
。[Claims for Utility Model Registration] (1) A power control device for a heater in an image forming apparatus having a switch element interposed between a power source and a heater, comprising: a signal generating means for generating a reference signal of a predetermined voltage; and the reference signal. a threshold value setting means for setting a threshold value for the reference signal; and a comparison means for comparing the reference signal and the threshold value to form an on/off signal with a duty ratio corresponding to the value of the threshold value. . A power control device for a heater in an image forming apparatus, wherein the switch element is opened and closed according to the on/off signal to control power supplied from the power supply to the heater. (2) A power control device for a heater in an image forming apparatus according to claim (1), wherein the reference signal is a triangular wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987171522U JPH0176182U (en) | 1987-11-10 | 1987-11-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987171522U JPH0176182U (en) | 1987-11-10 | 1987-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0176182U true JPH0176182U (en) | 1989-05-23 |
Family
ID=31463428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987171522U Pending JPH0176182U (en) | 1987-11-10 | 1987-11-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0176182U (en) |
-
1987
- 1987-11-10 JP JP1987171522U patent/JPH0176182U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH032267U (en) | ||
| JPS63168508U (en) | ||
| JPH0176182U (en) | ||
| JPS5824815U (en) | Temperature control circuit for electric heating equipment | |
| JPH0468326U (en) | ||
| JPH0210785U (en) | ||
| JPH0482277U (en) | ||
| JPH0321992U (en) | ||
| JPS6434893U (en) | ||
| JPS5815555U (en) | room lamp timer | |
| JPS5916097U (en) | Operation start mechanism of electronic control equipment | |
| JPS62123671U (en) | ||
| JPS5869450U (en) | thermal pen | |
| JPS61143162U (en) | ||
| JPH0175947U (en) | ||
| JPH01120306U (en) | ||
| JPH0167575U (en) | ||
| JPS5844614U (en) | Current feedback transistor switching circuit | |
| JPH01162795U (en) | ||
| JPS6325491U (en) | ||
| JPS62186172U (en) | ||
| JPS5950132U (en) | triangular wave generator | |
| JPS63121410U (en) | ||
| JPS59154248U (en) | Temperature control device for sauna equipment | |
| JPS5847914U (en) | flashing device |