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To prevent a shift in the temperature of a heater.SOLUTION: A control unit (39) determines a phase angle in phase control executed in a second power control pattern so that the ratio of a period of an on state of a switching element (34) to a control period (YC) in the second power control pattern b...

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Bibliographische Detailangaben
1. Verfasser:	HIROSE KOJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CINEMATOGRAPHY CONTROLLING ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Zusammenfassung:	To prevent a shift in the temperature of a heater.SOLUTION: A control unit (39) determines a phase angle in phase control executed in a second power control pattern so that the ratio of a period of an on state of a switching element (34) to a control period (YC) in the second power control pattern becomes closer to the ratio of the period of the on state of the switching element (34) to a control period (YC) in a first power control pattern.SELECTED DRAWING: Figure 9 【課題】ヒータの温度のズレを抑制する。【解決手段】制御部（３９）は、第２の電力制御パターンにおける制御周期（ＹＣ）に対する切替素子（３４）のオン状態の期間の割合が、第１の電力制御パターンにおける制御周期（ＹＣ）に対する切替素子（３４）のオン状態の期間の割合に近づくように、第２の電力制御パターンにて実施される位相制御における位相角を決定する。【選択図】図９