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    • 3. 发明授权
    • Magnetic drill press with alternate power source
    • 磁力钻机具有备用电源
    • US09561568B2
    • 2017-02-07
    • US14262085
    • 2014-04-25
    • Black & Decker Inc.
    • Daniele C. Brotto
    • B23Q3/154B25H1/00
    • B23Q3/1543B23B39/14B23B2260/024B23B2260/062B23B2270/32B25H1/0071
    • A magnetic drill is provided with an alternate power source. The drill is comprises of: an electric motor for driving a tool; a controller configured to receive an AC input signal and operable to control a drive signal to the electric motor; an electromagnet arranged in a base of the drill housing and operable, in response to a DC voltage, to magnetically couple the base to a surface proximate to the base; an AC/DC converter configured to receive the AC input signal and operates, independent from the controller and in the presence of the AC input signal, to output a DC voltage to the electromagnet; and an alternate power source circuit that monitors the DC voltage output by the converter and, in the absence thereof, provides an alternate DC voltage to the electromagnet.
    • 磁钻具有备用电源。 该钻头包括:用于驱动工具的电动马达; 控制器,被配置为接收AC输入信号并且可操作以控制对所述电动机的驱动信号; 电磁体,其布置在所述钻孔壳体的基部中,并且响应于DC电压可操作地将所述基部磁耦合到靠近所述基座的表面; AC / DC转换器,被配置为接收AC输入信号并且独立于控制器并且在存在AC输入信号的情况下操作,以将DC电压输出到电磁体; 以及备用电源电路,其监视由转换器输出的直流电压,并且在其不存在的情况下向电磁体提供交替的直流电压。