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    • 9. 发明申请
    • APPARATUS WITH ACTIVE SOFTWARE CLAMPING OF SUPPLY VOLTAGE
    • 具有主动软件钳位电源的装置
    • US20140225544A1
    • 2014-08-14
    • US14176812
    • 2014-02-10
    • Milwaukee Electric Tool Corporation
    • Matthew J. Mergener
    • H02P6/00
    • H02P29/0241B25D17/00B25D2250/091B25D2250/221B25F5/00G01R19/165H02H7/0833H02P6/14H02P6/16H02P6/17
    • A power tool that includes a motor configured to drive a working element, a power supply that is coupled to the motor to provide power to the motor, a shunt circuit that is coupled to the power supply and the motor, and a controller. The shunt circuit includes a shunt switch and a shunt element and is configured to hold a voltage of the power supply below a high voltage threshold. The shunt switch is switchable between a conducting state, in which the shunt switch conducts current through the shunt element, and a non-conducting state, in which the shunt switch does not conduct current through the shunt element. The controller is coupled to the motor, the power supply, and the shunt circuit and is configured to determine the voltage of the power supply, and control the shunt switch based on the voltage from the power supply.
    • 一种电动工具,其包括被配置为驱动工作元件的电动机,耦合到所述电动机以向所述电动机供电的电源,耦合到所述电源和所述电动机的分流电路以及控制器。 分流电路包括分流开关和并联元件,并且被配置为将电源的电压保持在高电压阈值以下。 分流开关可以在分流开关通过分流元件导通电流的导通状态和不连通开关不通过分流元件导通电流的非导通状态之间切换。 控制器耦合到电动机,电源和分流电路,并且被配置为确定电源的电压,并且基于来自电源的电压来控制分流开关。