US 12,237,652 B2
Switch, gas insulated switchgear, and method for controlling switch
Mieko Nakano, Tokyo (JP); Shinichiro Nakauchi, Tokyo (JP); Yasunori Nakamura, Tokyo (JP); and Takahiro Edo, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/925,270
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jul. 6, 2020, PCT No. PCT/JP2020/026394
§ 371(c)(1), (2) Date Nov. 14, 2022,
PCT Pub. No. WO2022/009264, PCT Pub. Date Jan. 13, 2022.
Prior Publication US 2023/0238784 A1, Jul. 27, 2023
Int. Cl. H02B 13/075 (2006.01); H01H 33/36 (2006.01); H01H 33/42 (2006.01); H01H 33/91 (2006.01)
CPC H02B 13/075 (2013.01) [H01H 33/36 (2013.01); H01H 33/42 (2013.01); H01H 33/91 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A switch comprising:
a fixed contact;
a movable contact that is couplable to the fixed contact to complete a closing operation of the switch;
a motor to drive the movable contact via a drive mechanism that converts rotational motion into linear motion of the movable contact; and
a drive controller to drive and control the motor, wherein
the drive controller controls a rotation speed of the motor such that during an opening operation of the switch, a moving speed of the movable contact in a part of an entire moving range of the movable contact is lower than a moving speed of the movable contact during the closing operation of the switch from start to completion of the closing operation,
an interrupting point at which an arc current flowing between the movable contact and the fixed contact is extinguished is located in the part of the entire moving range,
a tip part of the movable contact is engaged with the fixed contact at start of the opening operation,
the drive controller controls the motor such that the motor rotates at a first rotation speed from start of the opening operation until the tip part of the movable contact reaches a first position at which the tip part has just separated from the fixed contact,
the drive controller controls the motor such that the motor rotates at a second rotation speed lower than the first rotation speed after the tip part of the movable contact passes through the first position until the tip part reaches a second position,
the interrupting point is located between the first position and the second position, and the part of the entire moving range of the movable contact is defined between the first position and the second position, and
the drive controller controls the motor such that the motor rotates at a third rotation speed higher than the second rotation speed after the tip part of the movable contact passes through the second position until the opening operation is completed.