Dual-mode corded/cordless system for power-operated devices

摘要: A dual-mode system for operating electrically powered devices, such as hand-held power tools and appliances, includes a cordless battery pack that supplies the current demands of device in mode or corded voltage converter necessary physical envelope commensurate size interchangeable with pack. The is provided high efficiency supply allows to generate required by driven accommodate widely varying loads consequent normal operation do so conditioner conditions input source current, 120 240 volts AC DC, provide relatively DC chopped at comparatively frequency, e.g., 25 KHz, switching devices. high-frequency, presented step-down transformer stepped-down output rectified low-voltage drive motor device.