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    • 3. 发明授权
    • Water supply
    • 供水
    • US06922348B2
    • 2005-07-26
    • US10332197
    • 2001-07-05
    • Kaoru NakajimaKenichi KajiwaraMasahito KawaiMasahiko KishiNobuhiro HigakiYukio Murai
    • Kaoru NakajimaKenichi KajiwaraMasahito KawaiMasahiko KishiNobuhiro HigakiYukio Murai
    • F04B17/00F04B47/06H02M3/24
    • F04B17/006F04B47/06F04D13/068F04D15/0236Y10S323/906
    • According to the present invention, in a water supply apparatus which converts output power of a solar cell with an inverter to drive a motor pump for pumping up water, a DC brushless motor having no sensor for detecting a position of a rotatable shaft is used as a motor for driving the pump. Further, the water supply apparatus, having a pump and a frequency converter for supplying electric power to the pump and controlling a rotational speed of the pump, includes a standard current value table in which rotational frequencies of the pump and standard current values as criteria for shutoff operation at the rotational frequencies are associated with each other, a rotational frequency detecting device for detecting a rotational frequency of the pump, a standard current value acquiring device for acquiring a standard current value corresponding to the rotational frequency detected by the rotational frequency detecting device with reference to the standard current value table, a current detecting device for detecting a current value supplied to the pump, and a comparing device for comparing the current value detected by the current detecting device with the standard current value acquired by the standard current value acquiring device.
    • 根据本发明,在使用逆变器转换太阳能电池的输出功率以驱动用于泵送水的电动泵的供水装置中,使用没有用于检测可旋转轴的位置的传感器的直流无刷电动机作为 用于驱动泵的电动机。 此外,具有用于向泵供给电力并控制泵的转速的泵和变频器的供水装置包括标准电流值表,其中泵的旋转频率和标准电流值作为标准 旋转频率的关闭操作相关联,用于检测泵的旋转频率的旋转频率检测装置,用于获取与旋转频率检测装置检测到的旋转频率相对应的标准电流值的标准电流值获取装置 参考标准电流值表,检测提供给泵的电流值的电流检测装置和用于将由电流检测装置检测的电流值与通过标准电流值获取获得的标准电流值进行比较的比较装置 设备。