| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnet apparatus which is capable of reducing power consumption without increasing a current value of power supply to a coil more than necessary by approximating fixing a resultant resistance value for flow of a current of power supply to the coil against the temperature rise. SOLUTION: A resistor 25 having a resistance value fixed against the temperature rise is connected in parallel to an NTC thermistor 24 having a negative temperature coefficient having such a characteristic that the resistance value curvilinearly decreases in accordance with the temperature rise due to power supply to a coil 16 or the like, to generate a parallel resultant resistance value approximately linearly decreasing in accordance with the temperature rise, and a resistance value of the coil 16 linearly increasing in accordance with the temperature rise and the parallel resultant resistance value approximately linearly decreasing in accordance with the temperature rise are added. COPYRIGHT: (C)2010,JPO&INPIT
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