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US 12,237,652 B2Granted
Switch, gas insulated switchgear, and method for controlling switch
AssigneeMitsubishi Electric Corporation
InventorsMieko Nakano, Shinichiro Nakauchi, Yasunori Nakamura, Takahiro Edo
Life of this patent
Estimating the term…
Abstract
A switch includes a fixed contact, a movable contact, a motor to drive the movable contact via a drive mechanism that converts rotational motion into linear motion, and a drive controller to control driving of the motor. 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 a closing operation of the switch. The part of the entire moving range includes an interrupting point at which an arc current is extinguished.
Claims11
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.
9 more elements
A method for controlling a switch that includes:
- a fixed contact;
- a movable contact that is couplable to the fixed contact to complete a closing operation of the switch;
- and
- a motor to drive the movable contact via a drive mechanism that converts rotational motion into linear motion of the movable contact,
- the method comprising:
- controlling the motor, during the closing operation of the switch, to rotate at a first rotation speed from start to completion of the closing operation;
- and
- controlling the motor, during an opening operation of the switch, to rotate at a second rotation speed in a part of an entire moving range of the movable contact, the second rotation speed being lower than the first rotation speed, wherein
- 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, and
- the controlling the motor during the opening operation of the switch includes:
- controlling the motor such that the motor rotates at the 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;
- controlling the motor such that the motor rotates at the second rotation speed after the tip part of the movable contact passes through the first position until the tip part reaches a second position, wherein the interrupting point is located between the first position and the second position, and wherein the part of the entire moving range of the movable contact is defined between the first position and the second position;
- and
- controlling 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.
12 more elements
Dependencies are inferred from the claim text.