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    • 22. 发明授权
    • AC/DC chopper for power tool
    • 交流/直流斩波器用于电动工具
    • US06286609B1
    • 2001-09-11
    • US09526682
    • 2000-03-16
    • David A. CarrierAndrew E. Seman, Jr.Christopher R. YahnkerSamuel G. Woods
    • David A. CarrierAndrew E. Seman, Jr.Christopher R. YahnkerSamuel G. Woods
    • H02J700
    • B25F5/008B25F5/02H02H7/0852H02J7/0065H02J7/34H02M1/10H02M3/155H02M2003/1555H02P7/288H02P7/291
    • A dual-mode system for inexpensively operating electrically powered double-insulated devices (12), such as hand-held power tools and appliances. The system includes a cordless battery power module (14) that supplies the power and current demands of the device (12) in a cordless mode or a chopper module (21) that supplies the necessary power and current demands in a physical envelope commensurate in size and interchangeable with that of the battery power module (14). The chopper module (21) is provided with a non-filtered high efficiency converter circuit that allows the chopper module (21) to generate the power and current required by the driven device (12). The inductance of the motor (11) for the driven device (12) is used to filter the output of the chopper module (21). Eliminating the output filter from the chopper module (16) significantly reduces the cost and size of the module (16). Additionally, the need for multiple battery packs and fast rechargers is minimized by the availability of a low-cost converter. The line power module (16) includes an EMI filter (15) for filtering AC or DC input power. The chopper module (21) chops the filtered voltage, providing a series of voltage pulses having a DC voltage level that is suitable for driving the motor (11).
    • 一种用于廉价操作电动双重绝缘装置(12)的双模式系统,例如手持电动工具和电器。 该系统包括无绳电池电源模块(14),其在无绳模式或斩波器模块(21)中提供设备(12)的电力和电流需求,其将必需的电力和电流需求提供在尺寸相当的物理外壳中 并且可与电池电源模块(14)的装置互换。 斩波器模块(21)设置有非滤波高效转换器电路,其允许斩波器模块(21)产生被驱动装置(12)所需的功率和电流。 用于驱动装置(12)的电机(11)的电感用于对斩波器模块(21)的输出进行滤波。 消除来自斩波器模块(16)的输出滤波器显着地降低了模块(16)的成本和尺寸。 此外,通过低成本转换器的可用性,可以最大程度地减少对多个电池组和快速充电器的需求。 线路电源模块(16)包括用于滤波AC或DC输入电力的EMI滤波器(15)。 斩波器模块(21)斩波滤波电压,提供一系列具有适于驱动电动机(11)的DC电压电平的电压脉冲。