Capacitance value fast-placing vacuum capacitor

A capacitance value fast-placing vacuum capacitor, comprising:

• a housing, a first electrode group and a second electrode group, wherein
• a vacuum chamber is provided in the housing, and the first electrode group and the second electrode group are mutually coupled and accommodated in the vacuum chamber;
• an electromagnetic drive mechanism is mounted on an outer side of one end of the housing, and the electromagnetic drive mechanism is capable of driving the first electrode group to shift relative to the second electrode group, so that the vacuum capacitor is capable of placing or changing between two capacitance value states;
• when the electromagnetic drive mechanism is energized, the electromagnetic drive mechanism is capable of driving the first electrode group to move in a direction away from the second electrode group, so that the vacuum capacitor is capable of placing or changing from a second capacitance value state to a first capacitance value state;
• and
• when the electromagnetic drive mechanism is deenergized, the first electrode group moves toward the second electrode group under a force of a difference between internal and external pressures of the vacuum capacitor, so that the vacuum capacitor is capable of placing or changing from the first capacitance value state back to the second capacitance value state;
• wherein a position of the second electrode group in the vacuum chamber is adjustable.