| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid actuator having a low hysteresis characteristics and capable of quick control. SOLUTION: The solenoid actuator (valve) 10 is provided with a movable magnetic core 40, a fixed magnetic core 60, a coil 50 surrounding the movable magnetic core 40 and the fixed magnetic core 60, and a magnetic core 61 housing the movable magnetic core 40, the fixed magnetic core 60, and the coil 50. A magnetic force detection means 70 measuring a magnetic flux of a gap part 80 indirectly is installed to a cutout part 100 arranged in the magnetic core 61. An actuator control circuit connected to the solenoid actuator (valve) 10 on the outside receives a signal from the magnetic force detection means 70 to control the magnetism (magnetic flux) generated in a magnetic circuit by the coil 50. When the magnetism of the magnetic circuit is controlled, attraction force of the gap part 80 is stabilized and occurrence of a hysteresis in the solenoid actuator (valve) 10 is lowered, and consequently, quick control can be carried out. COPYRIGHT: (C)2004,JPO
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