| 摘要 |
一种不断电之电控系统，包含：一电力或电子装置，接收外部之电源；一桥式整流电路，包含四个端点，其中第一端连接电源，第二端连接该电力或电子装置，第三端为接地端，第四端为电流馈入端；一第一回路，连接该桥式整流器之第四端，系用以将该桥式整流器输入的电压降至适当的操作电压；一第二回路，连接该桥式整流器之第四端，其包含一二极体组，该二极体组系用于在该第二回路的输入端建立一基准电压，并将该基准电压提升至适当的操作电压；一开关，连接该桥式整流器之第四端及该第一节点之间，主要用于控制电流由桥式整流器流入的电流流入该第一回路或第二回路；一应用电路，并连该第一回路及该第二回路，当该开关导通该第一回路时，该应用电路接受来自该第一回路的电流，以驱动其内部相关的元件；当该开关导通该第二回路时，该应用电路接受来自该第二回路的电流，以驱动其内部相关的元件。; a bridge rectifier having four terminal points; wherein one point is connected to a power source; a second end is connected to the electric or electronic device, a third end is grounded; and a fourth end receives feeding current; a first loop is connected to the fourth end of the rectifier for voltage reduction of the rectifier; a second loop is connected to the fourth end of the rectifier; the second loop is a diode set for building a base voltage and for promoting the base current to a proper one; a switch is connected between the fourth end and a first node for controlling the current from the rectifier to the first or second loops; an application circuit is connected the first and the second loop. When the first loop is conducted by the switch; the application circuit receives the current from the first loop for driving the elements therein; when the second loop is conducted, the application circuit receives the current from the second loop for driving the elements therein. |
