MOTOR CONTROLLER, IMAGE FORMING DEVICE AND MOTOR CONTROL METHOD

PROBLEM TO BE SOLVED: To more accurately determine a failure of a DC motor.SOLUTION: A motor controller 1 comprises: an H bridge circuit 5 constructed by switching elements Q1 to Q4 and a DC motor 10; an electric power supply 24V supplying a power to the H bridge circuit 5 through a relay RL1; a current detection circuit 7 which detects whether or not a current flowing in the H bridge circuit 5 exceeds a reference current; a voltage detection circuit 9 (temperature detection circuit) which detects whether or not the temperature of switching elements Q1 to Q4 exceeds the reference temperature; and a control part 8 which, in accordance with the operation state of the DC motor 10, turns off a relay RL1 in the case where a detection result of the current detection circuit 7 or/and the voltage detection circuit 9 (temperature detection circuit) indicate an abnormal state of the DC motor 10.SELECTED DRAWING: Figure 1 【課題】ＤＣモータの異常をより正確に判断する。【解決手段】モータ制御装置１は、スイッチング素子Ｑ１乃至スイッチング素子Ｑ４とＤＣモータ１０により構成されたＨブリッジ回路５と、Ｈブリッジ回路５へリレーＲＬ１を介して電力を供給する電源２４Ｖと、Ｈブリッジ回路５を流れる電流が基準電流を超えるか否かを検出する電流検出回路７と、スイッチング素子Ｑ１乃至スイッチング素子Ｑ４の温度が基準温度を超えるか否かを検出する電圧検出回路９（温度検出回路）と、を備え、ＤＣモータ１０の動作状態に応じて、電流検出回路７の検出結果、又は／及び電圧検出回路９（温度検出回路）の検出結果が、ＤＣモータ１０の異常状態を表す場合にリレーＲＬ１をオフする制御部８と、を備える。【選択図】図１