| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety power supply protection apparatus for rapidly operating a safety circuit when an overcurrent is generated on the antenna side due to a short circuit in a power supply, reducing a current in an antenna power supply circuit before a fuse blows and a replacement of the fuse, and rapidly recovering. SOLUTION: A main DC stabilized power supply circuit 41 supplies a power supply voltage to the antenna power supply circuit 42. The fuse 43 and a positive characteristic thermistor 44 are connected to an output of the antenna power supply circuit 42 in series. Power is supplied from an antenna power line 23-2 to an antenna control cable 23. If the power supplied to the antenna is shorted and the overcurrent flows due to a problem on a motor, the power supply circuit is protected against the overcurrent by controlling a power supply current of a power supply 4 without blowing the fuse. COPYRIGHT: (C)2006,JPO&NCIPI
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