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    • 159. 发明申请
    • DIRECT-CURRENT MOTOR CONTROL DEVICE AND METHOD FOR DETECTING STATE OF DIRECT-CURRENT MOTOR
    • 直流电机控制装置及直流电机状态检测方法
    • US20110198521A1
    • 2011-08-18
    • US13020207
    • 2011-02-03
    • Hideki HayashiSatoru Hiramoto
    • Hideki HayashiSatoru Hiramoto
    • F16K31/02H02K11/00
    • H02K23/66F02D41/005H02P7/03Y02T10/47
    • A current detection unit detects an electric current caused by superimposing a direct current from a direct-current power source on an alternating current from an alternating-current power source and supplied through a brush to a direct-current motor. An extracting unit extracts an alternating-current component of the detected electric current. An angle detection unit detects a rotation angle of the motor according to the extracted alternating-current component. A direction detection unit detects a rotative direction of the motor according to a change pattern of the extracted alternating-current component. A core of the motor has slots each defined between adjacent two of teeth. The slots respectively accommodate phase coils respectively wound around the teeth. Turns of the phase coils are different from each other.
    • 电流检测单元通过将来自直流电源的直流电叠加到来自交流电源的交流电并通过电刷提供给直流电动机而引起的电流。 提取单元提取检测到的电流的交流分量。 角度检测单元根据所提取的交流分量检测电动机的旋转角度。 方向检测单元根据提取的交流分量的变化模式来检测电动机的旋转方向。 电动机的铁芯在相邻的两个齿之间具有槽。 这些槽分别容纳分别缠绕在齿上的相位线圈。 相位线圈的转数彼此不同。