KR20110120726A

KR20110120726A - Actuator for circuit breaker

Info

Publication number: KR20110120726A
Application number: KR1020100040272A
Authority: KR
Inventors: 주현우
Original assignee: 엘에스산전 주식회사
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2011-11-04

Abstract

PURPOSE: An actuator for a circuit breaker is provided to rapidly perform the trip motion and the insertion motion of a drive lever by varying the trip speed and the input speed of a movable element according to environmental change. CONSTITUTION: A main body(110) forms a drive space for a movable element(120). The movable element is arranged in the drive space of the main body to travel back and forth. A permanent magnet(130) is arranged in the drive space of the main body. A primary coil(140) generates an electromechanical force for driving the movable element. An auxiliary coil(150) selectively applies power as necessary.

Description

Breaker Manipulator {ACTUATOR FOR CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manipulator of a breaker, which is an industrial electric device used between transmission and distribution in an industrial wire, and more particularly, to a manipulator of a breaker for linearly reciprocating a mover by using a difference in magnetic resistance between a stator and a mover.

Circuit breakers are electrical protection devices that serve to protect load devices and lines from high currents caused by short circuits, ground faults, etc. that can occur in electrical circuits. The breaker automatically disconnects the line when an accident current occurs.

The vacuum circuit breaker, which is one of the circuit breakers, includes a manipulator for quickly disconnecting the circuit by arcing the arc generated in the vacuum vessel during normal load switching and breaking of the fault current. Such manipulators are known as permanent magnetic actuators (PMAs).

1 is a cross-sectional view showing a conventional permanent magnet actuator. Referring to FIG. 1, a conventional permanent magnet actuator includes a main body 1 having a movable body driving space 13 having a first stator face 11 and a second stator face 12 on both sides thereof. And a mover 2 mounted to the drive space 13 so as to be reciprocally driven, and a permanent magnet 3 installed inside the main body 1 to maintain an operating state of the mover 2 by coercive force. ), A trip coil (4) installed at one side of the permanent magnet (3) and excited by a trip signal of a control unit (not shown) to trip the drive (2) and the trip coil (4) of the trip coil (4). It is installed on the opposite side and includes an input coil 5 which is excited by an input signal of the control unit and drives the movable element 2 to input. And a driving lever 6 for tripping or closing the breaker at the end of the movable element 2 reciprocating linearly by the magnetic force of the permanent magnet 3, the trip coil 4 and the closing coil 5; ) Is extended.

In the conventional permanent magnet actuator as described above, when the current is not applied to the trip coil 4 or the input coil 5, the movable part 2 is the first stator surface by the electromagnetic force generated by the permanent magnet 3. It is fixed to 11. However, when a current is applied to the trip coil 4, the clamping force of the permanent magnet 3 is weakened and the mover 2 moves to the second stator surface 12, and to the trip coil 4. Even if the applied current is interrupted, the movable element 2 is fixed by the permanent magnet 3. When the current is applied to the input coil 5, the mover 2 moves to the first stator surface 11, and the first fixing is performed by the permanent magnet 3 even though no current is applied to the input coil 5. It is fixed to the magnetic surface (11).

However, the conventional permanent magnet actuator as described above is provided with a trip coil 4 and an input coil 5 in the drive space 13 of the main body, respectively, in the trip coil 4 and the input coil 5. It was to drive the mover 2 by alternating application of current, but this provided a constant electromagnetic force to the mover 2, and thus had a disadvantage in that it did not respond organically to environmental changes. For example, even if a relatively strong electromagnetic force is required due to an external factor at the time of tripping or closing, the tripping speed or closing speed of the mover 2 may be adjusted since the electromagnetic force that can be provided to the mover 2 is always the same. There was a problem that can not be variable.

An object of the present invention is to provide a breaker manipulator that can vary the trip speed and input speed of the mover according to environmental changes.

In order to achieve the object of the present invention, the main body is a movable drive space is formed therein; A mover installed in the driving space of the main body so as to be reciprocated and provided with a lever for tripping or closing at one end thereof; A permanent magnet installed in the driving space of the main body and maintaining the operating state of the mover by coercive force; A main coil installed in a driving space of the main body and generating an electromagnetic force for driving the mover when power is applied; And an auxiliary coil installed at an outer side of the main body and selectively applying power as necessary to drive an actuator together with the main coil.

Here, the main coil and the auxiliary coil may be installed on both sides of the permanent magnet around the permanent magnet.

The main coil and the auxiliary coil may be installed on one side of the permanent magnet with respect to the permanent magnet.

The main coil may be installed on both sides of the permanent magnet with respect to the permanent magnet.

Here, the auxiliary coil may have a smaller electromagnetic force than the main coil.

The manipulator of the circuit breaker according to the present invention further includes a separate auxiliary coil on the outer side of the main body so that the tripping operation and the closing operation of the driving lever can be rapidly performed, thereby improving the performance of the circuit breaker.

1 is a cross-sectional view showing a conventional permanent magnet actuator,
2 is a cross-sectional view showing a permanent magnet actuator of the present invention;
3 and 4 show the operation of the permanent magnet actuator according to Figure 2, Figure 3 is a trip operation, Figure 4 is a closing operation.
5 and 6 show other embodiments of the manipulator of the circuit breaker according to FIG. 2, in which FIG. 5 shows both a main coil and an auxiliary coil disposed on one side of the permanent magnet, and FIG. 6 shows the first main coil and the first coil. Two main coils are placed on each side of the permanent magnet.

Hereinafter, a manipulator of a circuit breaker according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

Figure 2 is a cross-sectional view showing a permanent magnet actuator of the present invention, Figures 3 and 4 shows the operation of the permanent magnet actuator according to Figure 2, Figure 3 shows a trip operation, Figure 4 shows a closing operation.

As shown therein, the manipulator of the circuit breaker according to the present invention includes a main body 110 in which a mover driving space 113 is formed to have a first stator surface 111 and a second stator surface 112 at both sides thereof. And a mover 120 mounted in a driving space 113 of the main body 110 so as to be reciprocally driven, and installed on an inner circumferential surface of the driving space 113 of the main body 110, and by the coercive force. Permanent magnet 130 to maintain the operating state of the) and the excitation by a trip signal or an input signal of the installation control unit (not shown) on one side of the permanent magnet 130 to trip the mover 120 or Alternatively, the main coil 140 to be driven and driven is installed outside the main body 110 to selectively trip the mover 120 together with the main coil 140 while power is selectively applied as necessary, or An auxiliary coil 150 to be injected is included.

The main body 110 is formed by stacking a plurality of steel sheets made of magnetic material, and each steel sheet is intaglio so that its inner circumferential surface forms the mover driving space 113. And the inner circumferential surface of the drive space 113 is formed with a magnet fixing groove 115 is intaglio so that the permanent magnet 130 is inserted and fixed, the main coil 140 on one side of the magnet fixing groove 115 Coil fixing groove 116 is formed to be inserted and fixed. The magnet fixing groove 115 and the coil fixing groove 116 may be continuously formed along the moving direction of the mover 120, but may be formed at regular intervals in some cases.

The mover 120 extends to one side of the first movable part 121 and the first movable part 121 to reciprocate in the driving space 113, and reciprocates outside of the main body 110. It consists of a second movable part (122).

The first movable part 121 is formed larger than the second movable part 122, and a flange part 123 is formed at the end of the second movable part 122 to limit the reciprocating motion of the movable part 120. In addition, a driving lever (not shown) is formed at the end of the second movable part 122 to trip or drive the breaker.

The permanent magnets 130 may be formed in a cylindrical shape to surround the outer circumferential surface of the first movable part 121 of the mover 120, or may be disposed on both left and right sides of the first movable part 121, respectively.

As described above, the main coil 140 is wound and installed in an annular shape so as to be located at one side of the mover 120, that is, near the end of the first movable part 121. The main coil 140 is electrically connected to a first power supply 141 that can apply power to the main coil 140.

As described above, the auxiliary coil 150 is wound in an annular shape so as to surround one side of the mover 120, that is, the second movable part 122, and is fixed to an outer side surface of the main body 110. The auxiliary coil 150 supplies power to the auxiliary coil 150 selectively, that is, to supply power to generate electromagnetic force in the same direction as the main coil 140 or to generate electromagnetic power in another direction. The second power supply 151 capable of applying the is electrically connected. The second power supply 151 may apply power at the same time as the first power supply 141 if necessary, but in some cases may not apply power unlike the first power supply 141. have.

The manipulator of the breaker according to the present invention as described above has the following effects.

That is, when power is applied to the main coil 140 in the first direction, electromagnetic force is generated in a direction in which the driving lever trips, that is, a direction in which the main coil 140 pushes the driving lever. Then, the coercive force of the permanent magnet 130 is weak compared to the electromagnetic force by the main coil 140, the mover 120 is moved in the direction of the second stator surface 112 as shown in FIG. Then, the breaker trips by the driving lever extended from the mover 120.

In this case, when the power applied to the main coil 140 is cut off, the mover 120 is fixed to the second stator surface 112 of the driving space 113 by the coercive force of the permanent magnet 130. Will be maintained.

On the other hand, when power is applied to the main coil 140 in a second direction, electromagnetic force is generated in a direction in which the driving lever is input, that is, in a direction in which the main coil 140 pulls the driving lever. Then, as the coercive force of the permanent magnet 120 becomes weaker than the electromagnetic force by the main coil 120, the mover 120 moves in the direction of the first stator surface 111 as shown in FIG. 4. Then, the breaker is driven by the driving lever extended from the mover 120.

In this case, when the power applied to the main coil 140 is cut off, the movable element 120 is fixed to the first stator surface 111 of the driving space 113 by the coercive force of the permanent magnet 130. Will be maintained.

In this case, when a trip operation or a closing operation of the driving lever is to be promptly performed, power is applied to the auxiliary coil 150 and the mover 120 is quickly tripped by the auxiliary coil 150. It can be moved in the feeding direction.

For example, when the trip operation is to be performed quickly, the main coil 140 may be supplied with power in the first direction and the auxiliary coil 150 may also be supplied with power in the first direction. The mover 120 is moved in the direction of the second stator surface 112 by the combined force of the electromagnetic force by) and the electromagnetic force by the auxiliary coil 150. Accordingly, the mover 120 can move quickly in the direction of the second stator surface 112, that is, the tripping direction.

On the other hand, when the closing operation is to be carried out quickly, the auxiliary coil 150 is applied to the power as opposed to when the trip driving, so that the mover 120 by the electromagnetic force of the main coil 140 and the auxiliary coil 150 ) Is moved in the direction of the first stator surface 111. Accordingly, the mover 120 can move quickly in the direction of the second stator surface 112, that is, the tripping direction.

In this way, the tripping operation and the closing operation of the driving lever are rapidly performed, and thus the performance of the circuit breaker can be improved.

On the other hand, if there is another embodiment of the manipulator of the circuit breaker according to the present invention is as follows.

That is, in the above-described embodiment, the main coil and the auxiliary coil were disposed on both sides of the permanent magnet with respect to the permanent magnet, respectively. In this embodiment, as shown in FIG. 5, the main coil 240 and the auxiliary coil. 250 is all disposed on one side of the permanent magnet 130.

Even in this case, by using the auxiliary coil 250 to reinforce the electromagnetic force by the main coil 240 to increase the operating speed of the mover 220 can be a tripping operation and closing operation of the circuit breaker quickly.

Since the structure and operation of the manipulator for this is substantially the same as the above-described embodiment, a detailed description thereof will be omitted. In the drawing, reference numeral 210 denotes a main body.

In another embodiment, as shown in FIG. 6, the first main coil 341 and the second main coil 342 are disposed on both sides of the permanent magnet 330, respectively.

In this case, while the main coils 341 and 342 are alternately applied with power, a trip operation or a closing operation of the driving lever is performed. In this case, by using the auxiliary coil 350 to reinforce the electromagnetic force by the main coils 341 and 342, the operation speed of the mover 320 is increased, and a tripping operation and a closing operation of the circuit breaker are performed quickly. Can be.

Since the structure and operation of the manipulator for this is substantially the same as the above-described embodiment, a detailed description thereof will be omitted. In the drawings, reference numeral 310 denotes a main body, and 320 denotes a mover.

110: body 120: mover
121: first movable part 122: second movable part
130: permanent magnet 140: main coil
150: auxiliary coil

Claims

A main body in which a mover driving space is formed;
A mover installed in the driving space of the main body so as to be reciprocated and provided with a lever for tripping or closing at one end thereof;
A permanent magnet installed in the drive space of the main body and maintaining the operating state of the mover by coercive force;
A main coil installed in a driving space of the main body and generating an electromagnetic force for driving the mover when power is applied; And
And an auxiliary coil installed at an outer side of the main body and selectively applying power as necessary to drive an actuator together with the main coil.

The method of claim 1,
The main coil and the auxiliary coil is a manipulator of the breaker which is respectively installed on both sides of the permanent magnet around the permanent magnet.

The method of claim 1,
The main coil and the auxiliary coil is a manipulator of the breaker which is installed on one side of the permanent magnet around the permanent magnet.

The method of claim 1,
The main coil is a manipulator of the breaker which is installed on both sides of the permanent magnet around the permanent magnet respectively.

The method according to any one of claims 1 to 4,
The auxiliary coil is a manipulator of a circuit breaker having a smaller electromagnetic force than the main coil.

The method according to any one of claims 1 to 4,
And the auxiliary coil is connected to a power supply different from the main coil.