SA111320460B1 - An Actuator, Circuit Breaker And Method Therefor - Google Patents

Abstract

The present invention relates generally to actuators and relates specifically to actuators requiring rapid movement, for example electrical switching applications. The present invention relates to an actuator comprising a flat coil (1), a magnetic armature (2) and an initial positioning element (3). The first positioning element shall be configured to keep the armature away from the flat coil (1) in first position, and the actuator shall be configured so that when a fault current passes through the flat coil it is sufficient to resist the force applied to the armature by the first positioning element , to magnetically attract the armature to the flat coil in a second position. A corresponding circuit breaker and method for its use are also provided. Thus, the actuator can be used in a circuit breaker to trip a direct current (DC) system.

Description

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triggered Circuit breaker and how to use them

An actuator, circuit breaker and method therefor Full Description Background Requires oD hae and specifically relates to actuators The present invention relates generally to fast-moving electrical switching actuators; For example electrical switching applications in all circuit breakers networks Actuators are used for example in circuit breakers to protect networks from damage caused by electrical power distribution networks © and circuit breakers have a point short circuits Or short circuits, overload, for overload, Sia, and at least one fixed contact piece, with a fixed contact piece, contact point, threshold value, fault current, Ws cmovable contact piece, movable (ually), the tripping tripping directly or indirectly crosses the pre-set tripping threshold directly with the moving contact to open the point contact. The circuit breaker should be tripped (tripped) as quickly as possible when a fault current is detected. This in turn forces the operator to operate the circuit breaker The circuit breaker contacts should be opened quickly and reliably Once the breaker is released the latching mechanism should keep the contacts in the open position by a ratchet mechanism In a position where the contact points are open in order for the movable assembly to become 1p. The circuit breaker is returned to the closed position after isolation of the faulty part of the circuit. Extra unlatching mechanical system The actuator using a mechanical or magnetic means has a bistable operation, although mechanical bistable systems “mechanical or magnetic means” are complex and unreliable for the distance springs (based on mechanical bistable systems | 0 short springs that It separates the first position from the final position; in magnetic systems, it is possible to place a moving piece on the moving piece, which increases its mass and reduces its acceleration. DC is particularly important for fast tripping systems and fast tripping is normally considered as in direct current (AC) systems because ¢ (direct current (alternating current) are not arc quenched). Fast and reliable starters can also be used in mechanical applications Variety where speed and accuracy are important points. © Coiled US Patent #1,049777 discloses an actuator incorporating a pivotable armature magnetic armature coil around a pivotable armature where the initial positioning element and magnetic armature The first positioning element to keep the armature in first position; Where the file is forming the production member to a second position of the coil when the magnetically attracting current flows to magnetically attract Ye and the said current is sufficient to resist the force on the production member celal PLA current by the first positioning element. b electro The US Patent No. 4,671,908 states a fuse cartridge mechanical circuit breaker device on an electrical printed circuit coil wheel ++ [OEYAY] The International Patent No. No. Vo describes a type level. electrical printed circuit coil module circuit breaker circuit breaker assembly 0497077 European Patent No. terminals shows alternating current path assembly. double break contact bridge includes a contact bridge Double season

Co The present invention provides a solution to the problem of supplying a BL actuator and in light of the technology x de yu requires tripping devices for a circuit breaker that can be used in high fast actuator releases and small displacements General description of the invention Rapid releases that can be used in Jase release tools The objective of the present invention is to provide small displacements that require high speed and Ye This objective is achieved; and others; According to the present invention through an actuator; circuit breaker and method of their use; Respectively; As defined in the appended claims

¢ According to a first aspect of the present invention; supply a starter comprising a flat coil magnetic armature and a first positioning element 0 and the first positioning element configured to keep the armature away from the flat coil in first position; The amplifier shall be configured such that when a fault current is passed in the flat coil it is sufficient (with the force resistance applied to 0 on the armature by the first positioning element) to magnetically attract the armature towards the flat coil to a second position. In this way; It is possible to reduce the weight of the actuator and increase its speed in circuit breaker release. The first position selector element may include a permanent magnet configured to keep the armature away from the first position flat coil. 0 The first position selector element may include a spring to hold the armature away from the flat coil in the first position. The actuator may include a second permanent magnet fitted in the center of the flat coil, by means of which a fast and aggressive Jada bi-stable actuator is obtained. and by providing the magnetic production member of the actuator ify at its center; In order to guide along a Vo non-magnetic and non-conductive guide, the strength of the former is improved and its weight is additionally reduced, which increases its speed. Using both sides of the flat file; The actuator comprises a third permanent magnet and a second magnetic armature; Where the third permanent magnet is configured to keep the second magnetic armature away from the flat coil in Jol position and the actuator is configured so that “0” when a fault current passes in the flat coil this is sufficient (with the force on the second armature being resisted by the third magnet) to magnetically attract the second armature to touch the flat coil in a second position; The third permanent magnet and second armature are on opposite sides of the flat coil compared to the armature and first positioning element. And to reduce the sensitivity to eddy currents (Sa ceddy currents) split the armature. Yo and provide a multi-contact system in the actuator and provide the armature with a conductive bridge and a permanent magnet for each gap of the multipoint system contact; the immobilizer can be used in a circuit breaker to limit current in systems with DC applications

at a higher voltage. The flat coil is connected in series with the circuit to be protected and the multi-contact system. It is recommended that the manifold include a switch to return the igniter from position 2 to position 1. The switch can be turned by mechanical gears or by electromagnetic method. According to a second aspect of the present invention; A circuit breaker shall be provided including the actuator according to the first aspect, whereby the circuit breaker is designed to close when the actuator is in the first position and to open (Laie) when the actuator is in the second position. According to a third aspect of the present invention; Provides a method for interrupting a circuit using a starter comprising 0 flat winding; Magnetic production member and first positioning element. The method includes the following steps: While a normal current flows in the flat coil. keep the armature away from the flat coil in first position with first position limiting element 0 and while a fault current flows in the flat coil; magnetically attract the armature towards the flat coil to a second position; With the resistance of the force applied on the armature by the first positioning element 0 and in this manner; System 0 multi-point unlocking with reduced bouncing; This provides galvanic isolation for the faulty part of the circuit. The first positioning element may comprise a first permanent magnet; A second permanent magnet may be provided in the center of the flat coil and Jas) may include a third permanent magnet and a second magnetic armature. And then; The method may include the following steps: T a normal current flow in the flat coil, keeping the second armature away from the flat coil in first position using the first permanent magnet and while a fault current flows in the flat coil, magnetically attracting the second armature towards flat file to a second position; With the force on the second armature resisted by the third magnet; where the third permanent magnet and second armature are on opposite sides of the flat coil compared to YO with the armature and first positioning element. The circuit breaker method may include the following step: bistable clamping of the armature(s) to the flat coil by means of a second permanent magnet located in the center of the flat coil; to improve intensity.

; Other features and advantages of the present invention will be illustrated by the following description. BRIEF EXPLANATION OF DRAWINGS The present invention will be fully understood by the detailed description of the embodiments provided below and accompanying figures provided for illustration. they are not specific to the present invention ©; Where: Figure 1: shows a schematic diagram of a production member and a flat coil for an igniter. Figures fy: schematically showing in profile a first and second position of an actuator according to an embodiment of the present invention based on permanent magnets. the shape ? Fig. 0 : shows schematically a sectioned armature in side view. Fig. 0 : shows schematically in side view a first position of an actuator according to an embodiment of the present invention. Fig. o : schematically shows a faulty state of the actuator shown in Fig. 4. +: Shows schematically a position between the first position and the second position of the actuator shown in Figure 4. ae. According to an embodiment of the present invention Fig. ? : shows schematically in profile view a second position of an actuator according to an embodiment of the present invention based on springs Ye Detailed description in the following description; for illustrative and not specific purposes Special details are given Jie Special techniques and applications for understanding the invention However, a person skilled in the art will realize that the invention call may be applied in other embodiments that deviate from the particular details. In other cases, the detailed description of well-known Sealy methods has been omitted so as not to render the description of the present invention v0 A first embodiment of a circuit-breaker incorporating a armature of the present invention is now described by reference to YoY Figures 11. Figure I shows the modulated with a first position armature and Figure B shows the included with a second position armature. Note that it can be used

similarly triggered in various other contexts; Whereas, the defibrillator is not limited to the use of a circuit breaker. The actuator comprises a flat coil 1; first permanent magnet oY magnetic output member “? and a second permanent magnet 4. It should be noted that the flat coil 1 can be represented by any coil having a generally flat structure ©. The magnetic output member ¥ is bistable held in first position by a first positioning element in the form of the first permanent magnet.” When the circuit breaker actuator is in this first position » the circuit breaker is in the closed position and the actuator is used to close an electric circuit. Because of Alls defect Sie the current in the flat coil 1 increases and the armature arm 0 ¥ is attracted to a second position on the armature arm 1. The armature arm 0 is ? bistable held in GB position by the second permanent magnet; located in the center of the flat coil 1. In this second position the circuit breaker and its actuator are in the open position and Jada is used to interrupt an electrical circuit. And can it include a magnetic production member? on a hole in its center; To orient the magnetic output ve member ¥ stably between bistable positions 1-5816 along a non-magnetic guide ¢ such as a plastic rod The circuit breaker may include an oY switch Such as a mechanical gear mechanism to be used to return the actuator from the second open position to the first closed position. As can be seen in Figure ef if a user presses the 1 key towards 0 . The bottom is the magnetic production member? It will be pushed away from the second position by the flat coil 1 back to the first position. optionally; The switch reset spring 1 shall be provided so that the switch (AY) returns to an upper position after use so that any force applied to the switch oY due to gravity Ole does not affect the armature arm 1 when it is in position 1. Any force acting on the armature could adversely affect the operating speed when the YO actuator is ON. It is recommended to use this embodiment without a magnetic core around the flat coil due to the magnetic field output during a fault condition.

A

is a function of the current of the electrical circuit; In addition, the magnetic force is not Jha. Thomson coils are derived from it as in solutions based on Thomson coils there is no need to provide (UY) and due to the beneficial magnetic properties of a member on the moving part of the accelerator » Therefore, its weight decreases; thus the release speed is increased. dail stool Another advantage of utilizing a magnetic production organ according to the present invention is that as a result of °; The distance between the first position, mechanical springs, because there is no need for mechanical springs, is usually less than ¾ mm; and the second position of the magnetic production member can be small, low voltage, low voltage, DC mm, in the case of application to circuit breakers. 1 and can be about .100 typical breakers; The magnetic force of the first permanent magnet DC and with respect to interrupter 0 acting on the magnetic armature is adjusted in its first position to ensure low contact resistance of the multi-contact system in the closed position; The strength, contact resistance, of several tens of normal operating current is newtons; The force of 1 ampere 8 on the armature is less than about the magnetization of the second permanent magnet located on the armature in its first position about Ve acting on the armature is gravitation force and the gravitational force (Newton) is a few newtons The magnetic is neglected in this context. The conductivity of the magnetic permeability (Ja) is very high. While there is a state of saturation flux density is low and the flux density is at saturation Yo when the current in the flat coil increases rapidly, the magnetic force of the flat coil located in Newtons with respect to the peak current 001 on the magnetic armature can reach in excess of Ampere, which is sufficient to move the low weight armature very quickly from the first position 0005 to the second position; thus the electric current is cut off by the circuit breaker. Schematically in profile view a second position of the actuator according to a second embodiment 1 shows the figure vo of the present invention resting on springs. And in this embodiment; The first position selector is in position 1 and during normal operation; The spring holds the armature. 4 spring. Photo of spring p200015108. And when the first force occurs away from the flat file by providing a repulsive force

Fault and a fault current flows in the flat coil 1 the resulting magnetic force is sufficient to counteract the repulsive force of the spring 4; Thus the production member advances from the flat file. It should be noted that the spring 9 may consist of several springs suitably positioned to provide additional stability.

° It is not considered the second permanent magnet; intended for holding the magnetic armature bistable in the second position necessary for rapid circuit-breaking; This is illustrated in a third embodiment of the present invention in Figure 3. This embodiment also includes a 1 sectioned armature to reduce the influence of eddy currents in it.

Figures 2-4 illustrate a Tad embodiment of the Tay actuator of the present invention. This operator is identical to that of the first embodiment described above; except for the following. The multi-contact system has three slots. The ¥ magnetic production member has low conductivity and is equipped with three electrically ca ch JA conductive bridges, each of which connects to a gap for the multi-contact system. A permanent magnet is placed at each AY af IF Jail Ve gap shown in the figure; Explained while it is in its first position with the presence of the magnetic production member? At the three permanent stools? A Al eat and when Als malfunction occurs; The current in the flat coil 1 increases rapidly and the magnetic force of the flat coil 1 located on the magnetic armature oF increases as shown in Figure 0 where the electrically conductive bridge appears above the permanent magnet “a” just out of the first position Jie 0 Permanent magnet IF When the armature 1 moves close to the flat coil oY the driving force of the armature arm towards the flat coil 1 increases. Figure 1 shows the magnetic output member 1 between position one and position two; With an illustration of the arc discharges between the aA cA fA bridges and the multi-contact system. What is the force on the magnetic production member? bigger now; Because the distance towards Ye the flat coil decreased and the distance towards the permanent magnets cal ef oF ADEN increased. When this distance increases, the total arc voltage across each pair of contacts increases until it reaches a value equal to or greater than the supply voltage, which makes the current transient in the circuit reach zero.

0 and in the second mode; Shown in Figure 7 the arc discharges are quenched; And since the current in the flat coil is ia, the magnetic force of the flat coil on the magnetic armature is zero. and maintains the magnetic production member in the second position by another permanent magnet; located in the center of the flat file?. In this way; The actuator has two modes 0 bistable, mode one and mode two. The oY switch as shown in figure of can be used to return the circuit breaker to the first position. Figure A shows a fifth embodiment of a modulator according to the present invention. This modulator is identical to that of the first embodiment described above; except for the following. The actuator includes an auxiliary MAG© and another permanent magnet 1 to keep the auxiliary MAG© bistable in the first position. The auxiliary armature * and associated permanent magnet + are on opposite sides of the flat coil 1; compared to the armature ? and the permanent magnet accompanying it. By anti-permanent magnetization 1 with the auxiliary armature *ve fixed in the first position bilaterally (LEY) as compared to the permanent magnet oF two electric circuits can be protected by one flat winding. This fifth embodiment of the present invention may also be combined with the fourth embodiment of the present invention described above. Obviously, the present invention can be modified in several ways. Such modifications should not be considered outside the scope of the present invention. As is obvious to a person savvy in technology; All such modifications are within the scope of the present invention as defined in the enclosed claims.

Claims (1)

11 magnetic protection elements (1) magnetic production member; flat coil including a flat coil 1-1 actuator Jade (Y) armature Y and a Cua “initial positioning element” The v element (© 3) is initialized to keep the armature away from the flat coil (1) ¢ in first position and the modulator is initialized So that when a fault current passes through the flat coil °, this is sufficient (with the resistance of the force exerted on the armature by the first position 1 limiting element) to magnetically attract the armature towards the flat coil in a second position. initial wherein the first positioning element 1 according to the actuator actuator actuator Y —1 is prepared to keep the (¥) permanent magnet positioning element 7 in the first position. (1) flat coil apart from the flat coil armature production member 1 initial where the first positioning element 0 (according to actuator Jada) 1-1 armature is prepared to keep the armature (9) spring on a spring positioning element Y in the first position. (1) flat coil away from the flat coil v second according to the protection?; Incorporating a second permanent magnet actuator;- 1 flat coil fitted in the center of the flat coil (4) permanent magnet for 1 ©#- the actuator pursuant to any of the foregoing claims; wherein the magnetic armature of the Y armature has a hole in its center; with the aim of guiding along a non-magnetic and non-conductive guide Jaga 7. 1 +- the actuator according to the claim; or © when relying on the protection of the Y includes a third permanent magnet (1) and a magnetic armature ob 0 (©) second magnetic armature 0 where the third permanent magnet is (1 set to keep the second magnetic output member (0) away from the flat coil (1) flat coil in “Jf°” position and the actuator is set so that when a fault current passes through the flat coil 1 it suffices ( With the resistance of the force on the second armature by means of the third magnet) v to attract the second armature magnetically to touch the flat coil in a second position; and it is \Y The third permanent magnet (1) and the second magnetic armature (0) located on the side A in comparison with the armature (7) and the first positioning element (1) opposite of the flat coil 1 (¥) ye where the actuator is divided. dill) according to any of the claims actuator actuator 1-1 according to any of the previous claims; Incorporating actuator - + 1 Kas multipoint system on armature bridge and where output member includes emulti-contact system Y (a “av fv) permanent magnet (aA “cA A) permanent magnet ) conductive bridge and for each slot of the multicontact system. ¢ (V) switch according to any of the preceding claims; Includes actuator 1 -4 Jail switch from position 2 to position 1. armature to reset armature Y according to any of the safeguards actuator includes actuator circuit breaker 0-1 circuit breaker is actuator In the first position Laie where the circuit breaker is designed to close ALL and to open when the actuator is in the second position. ¥ on file daily actuator using circuit breaking method 1-11 (7) magnetic armature; (1) flat coil Y. The method includes the following steps: initial positioning element 1 away from the armature during a natural current flow in the Flat coil; maintain the output member - ' on the flat coil ( \ ) in first position using the positioning element | for first °; attract the output member (1) flat coil fault current Ha Lal current flow - 1 magnetically towards the flat coil to a second position with the resistance of the force applied to the armature v by means of the positioning element of the first A where: 11 the method according to the element of protection 11 - 1 on the first permanent magnet initial positioning element - Y «(Y) first permanent magnet Y \Y ¢ - A second permanent magnet Ob (4) is provided in the center of the flat coil «(V) flat coil ° 1 - The actuator includes a third permanent magnet (1) «(®) second magnetic armature OU and a magnetic production member A Whereas, the method includes the following steps: 3 - While a normal current flows in the flat coil. Keeping the second magnetic output member 1 (*) away from the flat coil (1) in first position using the first permanent magnet 11 ( “”); VY - or fault current flowing into the coil flat;” the second armature Vy magnetically attracted towards the flat coil to a second position with the force on the second armature ve resisted by the magnet cB where the third permanent magnet (1) and the second armature vo magnetic ) 0) located on opposite side of the flat coil (1) compared to 1 the armature (V) and the first positioning element (¥) -11-1 The circuit breaking method according to protection element 11 or AY includes the following step Y: Install armature(s) bi-stabilized 3 at the flat coil by means of a second permanent magnet ¢ 61 in the center of the flat coil.