| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a protection device of a device drive circuit capable of stopping a device certainly with a simple configuration, even if hardware such as a microcomputer and software are unusual. <P>SOLUTION: The device drive circuit has a device 2 connected to an AC power supply 1, a drive switch 4 controlling the device 2, and a semiconductor switch 5 controlling a drive switch 3 under control by a central controller 10. The circuit includes a power source switch 4 for opening and closing the AC power supply 1 for the device 2, a protection mechanism 7 interlocking with a predetermined component, and a protection mechanism actuation detecting switch 8 which opens the power source switch 4 to cut off the power supply for the device 2, when the protection mechanism 7 actuates. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
