Device and method for energy storage tripping of circuit breaker

Abstract

The present invention provides a device and method for energy storage tripping of a circuit breaker, comprising an electromagnetic coil, a striker, a movable iron core, a stationary iron core, a magnetic spring, and a tripping connecting rod. The device is characterized in that it comprises: at least one energy storage module, a selection switch, and a control circuit, wherein the energy storage module is connected to the electromagnetic coil via the selection switch; when power is on, the energy storage module is charged, and the control circuit controls the selection switch to disconnect the energy storage module from the electromagnetic coil; after power is off, the control circuit controls the selection switch to connect the circuit of the energy storage module and the electromagnetic coil, the energy storage module discharges, thereby enhancing the electromagnetic field force in the electromagnetic coil, and the electromagnetic field force drives the movable iron core to overcome the elastic force of the magnetic spring and move toward the stationary iron core, thereby driving the striker to move and strike the tripping connecting rod to achieve tripping. The energy storage module of the present invention is connected to the electromagnetic tripping device only when power is off, thereby avoiding erroneous tripping caused by leakage and the like, and having a wider range of applications.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and in particular to a device and method for energy storage tripping of a circuit breaker. Background Art

[0002] A circuit breaker is a commonly used circuit protection unit. It usually automatically trips when the circuit is overloaded or short-circuited to protect the circuit. However, when a power outage occurs, the circuit breaker will not take any action. The circuit will be directly connected after the power is restored. This sudden power outage often causes serious safety hazards. On the one hand, there may be voltage fluctuations when the power is restored, which will cause shocks to many electrical equipment. If there are frequent power outages, it will directly cause damage to the electrical equipment. On the other hand, there may be cleaning and maintenance work on the electrical equipment during a power outage, especially for some dangerous equipment, such as grinders, noodle mixers, etc., which will be directly started if the power is restored suddenly. On the other hand, some high-energy-consuming electrical equipment may not be powered off during a power outage. A sudden power outage that causes these devices to operate will waste electricity. Therefore, how to cut off the circuit during a power outage has become an important issue in the safe use of electricity. In the existing technology, tripping is achieved by placing an electromagnetic force that can controllably change the direction of current between a permanent magnetic field force and a mechanical spring force. The disadvantages of this solution are that it places more demands on the original structure of the circuit breaker, has a narrow scope of application, and may cause false tripping. Therefore, proposing a more flexible, adaptable, and intelligent power-off tripping device has become a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0003] To address the above problems, the present invention prevents tripping caused by accidental discharge by providing an energy storage module that is charged when power is on and disconnected from the electromagnetic tripping device. When power is off, the energy storage module and the electromagnetic tripping device are connected, and the energy storage module discharges to the electromagnetic tripping device to form a magnetic field force. Under the action of the magnetic field force, the equilibrium state of the electromagnetic tripping device is broken, thereby achieving tripping.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for storing energy and tripping a circuit breaker, comprising an electromagnetic tripping device, wherein the electromagnetic tripping device comprises an electromagnetic coil, a striker, a moving iron core, a static iron core, a magnetic spring, and a tripping connecting rod, wherein one end of the striker is mounted on the moving iron core, and the other end sequentially passes through the magnetic spring and the static iron core to maintain a contact gap between the moving iron core, the striker, the magnetic spring, and the static iron core are all arranged inside the electromagnetic coil, and the electromagnetic coil is used to provide an electromagnetic field force when current passes through. When a large current passes through the electromagnetic coil, the electromagnetic field force pushes the moving iron core to overcome the elastic force of the magnetic spring and move toward the static iron core, and drives the striker to move so that the contact gap is eliminated and then hits the tripping connecting rod to achieve tripping. The device is characterized in that it comprises: at least one energy storage module, a selection switch, and a control circuit.

[0006] The energy storage module is connected to the electromagnetic coil via the selection switch;

[0007] When powered on, the energy storage module is charged, and the control circuit controls the selection switch to disconnect the energy storage module from the electromagnetic coil;

[0008] After power is cut off, the control circuit controls the selection switch to connect the circuit of the energy storage module and the electromagnetic coil. The discharge of the energy storage module enhances the electromagnetic field force in the electromagnetic coil. The electromagnetic field force pushes the moving iron core to overcome the elastic force of the magnetic spring and move toward the static iron core, and drives the striker to move so that the contact gap is eliminated and then hits the tripping link to achieve tripping.

[0009] Furthermore, the electric energy stored in the energy storage module can at least enable the striker to strike the tripping connecting rod to achieve tripping.

[0010] Furthermore, the energy storage module is a capacitor.

[0011] A method for energy storage tripping of a circuit breaker, applied to an electromagnetic tripper, is characterized by comprising:

[0012] After power failure, the stored electrical energy is released, causing a large current to flow through the electromagnetic release;

[0013] When a large current flows through the electromagnetic release, an electromagnetic field force is generated;

[0014] The electromagnetic field force drives the tripping mechanism in the electromagnetic release to achieve tripping.

[0015] Furthermore, the large current is at least greater than the maximum current that flows through the electromagnetic release when normally powered on and does not cause the electromagnetic release to trip.

[0016] Furthermore, when power is turned on, the module for storing electric energy is disconnected from the circuit of the electromagnetic release, and the module for storing electric energy is charged in the circuit.

[0017] The beneficial effect of the present invention is that when power is on, the circuit of the energy storage module and the electromagnetic tripping device is disconnected, and the energy storage module is charged at this time. When a power outage occurs, the control circuit controls the selection switch to connect the circuit of the energy storage module and the electromagnetic tripping device. The energy storage module discharges to the electromagnetic tripping device to generate an electromagnetic field force. The electromagnetic field force pushes the moving iron core to overcome the elastic force of the magnetic spring and move toward the static iron core, and drives the striker to move so that the contact gap is eliminated and then hits the tripping connecting rod to achieve tripping. Compared with the prior art, the energy storage module of the present invention is connected to the electromagnetic tripping device only when power is off, avoiding false tripping caused by leakage and the like. Moreover, when the energy storage module is a capacitor, the overall space occupied in the circuit breaker is smaller, more flexible, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a common circuit breaker electromagnetic tripping device in the prior art;

[0019] Figure 2 This is a cross-sectional structural diagram of a common electromagnetic tripping device for a circuit breaker in the prior art;

[0020] Figure 3 A circuit diagram of a circuit breaker energy storage tripping device according to the present invention;

[0021] Figure 4 This is a flow chart of a method for energy storage tripping of a circuit breaker according to the present invention;

[0022] Figure 5 Another flow chart of a method for energy storage tripping of a circuit breaker according to the present invention;

[0023] Figure 6 This is another flow chart of a method for energy storage tripping of a circuit breaker according to the present invention;

[0024] Explanation of the accompanying reference numerals: 1-electromagnetic release, 11-coil, 12-striker, 13-moving iron core, 14-static iron core, 15-magnetic spring, 16-tripping link, 2-energy storage module, 3-selector switch, 4-control circuit. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0027] like Figure 1-3 shown.

[0028] A device for storing energy and tripping a circuit breaker comprises an electromagnetic tripping device 1, wherein the electromagnetic tripping device 1 comprises an electromagnetic coil 11, a striker 12, a moving iron core 13, a static iron core 14, a magnetic spring 15, and a tripping link 16, wherein one end of the striker 12 is mounted on the moving iron core 13, and the other end sequentially passes through the magnetic spring 15 and the static iron core 14 to maintain a contact gap between the striker 12 and the tripping link 16, wherein the moving iron core 13, the striker 12, the magnetic spring 15, and the static iron core 14 are all arranged inside the electromagnetic coil 11, and the electromagnetic coil 11 is used to provide an electromagnetic field force when current passes through. When a large current passes through the electromagnetic coil 11, the electromagnetic field force pushes the moving iron core 13 to overcome the elastic force of the magnetic spring 15 and move toward the static iron core 14, and drives the striker 12 to move so that the contact gap is eliminated and then strikes the tripping link 16 to achieve tripping. The invention is characterized in that the device comprises: at least one energy storage module 2, a selection switch 3, and a control circuit 4.

[0029] The energy storage module 2 is connected to the electromagnetic coil 11 via the selection switch 3;

[0030] When powered on, the energy storage module 2 is charged, and the control circuit 4 controls the selection switch 3 to disconnect the energy storage module 2 from the electromagnetic coil 11;

[0031] After power failure, the control circuit 4 controls the selection switch 3 to connect the circuit of the energy storage module 2 and the electromagnetic coil 11. The energy storage module 2 discharges to enhance the electromagnetic field force in the electromagnetic coil 22. The electromagnetic field force pushes the moving iron core 13 to overcome the elastic force of the magnetic spring 15 and move toward the static iron core 14, and drives the striker 12 to move so that the contact gap is eliminated and then hits the tripping link 16 to achieve tripping.

[0032] It should be noted that the electric energy stored in the energy storage module 2 is at least sufficient to enable the striker 13 to strike the tripping link 14 to achieve tripping.

[0033] It should be noted that the energy storage module 2 can be any electrical component that stores electrical energy, and there can be multiple of them, such as multiple batteries. In a specific embodiment, the energy storage module 2 is two capacitors connected in parallel.

[0034] like Figure 4-6 shown.

[0035] A method for energy storage tripping of a circuit breaker, applied to an electromagnetic tripper, is characterized by comprising:

[0036] Step S1: After power failure, the stored electrical energy is released to cause a large current to flow through the electromagnetic release;

[0037] Step S2: When a large current flows through the electromagnetic release, an electromagnetic field force is generated;

[0038] Step S3: The electromagnetic field force pushes the tripping mechanism in the electromagnetic release to achieve tripping.

[0039] It should be noted that, under normal circumstances, the current flowing through the electromagnetic release disappears after power is cut off, and the electromagnetic release will not operate. After power is restored, the current flows directly to the electrical equipment through the electromagnetic release. In consideration of the safety of electrical equipment and users, the present invention trips the circuit breaker when the power is cut off to avoid damage to the electrical equipment and users after an unexpected power call. In order to trip the electromagnetic release when the power is cut off, the electric energy must still be released after the power is cut off. Therefore, a module for storing electric energy must be provided. Moreover, in order to avoid the electromagnetic release from tripping accidentally due to the influence of this module, the circuit of the electric energy storage module and the electromagnetic release remains disconnected when power is on. Only when the power is cut off will the circuit of the electric energy storage module and the electromagnetic release be connected.

[0040] In one embodiment, the invention further comprises: step P: the large current is at least greater than the maximum current that flows through the electromagnetic release when normally powered on and does not cause the electromagnetic release to trip.

[0041] It should be noted that the electromagnetic release known to those skilled in the art is used for circuit protection in overcurrent conditions such as short circuits. Under normal power-on conditions, an electromagnetic field force is also generated in the electromagnetic release, but this electromagnetic field force is not sufficient to push the tripping mechanism on the electromagnetic release to trip. However, when the current is too large, such as a short circuit, the electromagnetic field force will suddenly increase, pushing the tripping mechanism on the electromagnetic release to trip. Therefore, there is a critical value that can cause the electromagnetic release to trip. This value is the maximum current that can flow through the electromagnetic release under normal power-on conditions without causing the electromagnetic release to trip.

[0042] In one embodiment, the method further includes step M: when power is turned on, the module for storing electric energy is disconnected from the circuit of the electromagnetic release, and the module for storing electric energy is charged in the circuit.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A device for storing energy and tripping a circuit breaker, comprising an electromagnetic tripping device, wherein the electromagnetic tripping device comprises an electromagnetic coil, a striker, a moving iron core, a static iron core, a magnetic spring, and a tripping connecting rod, wherein one end of the striker is mounted on the moving iron core, and the other end sequentially passes through the magnetic spring and the static iron core to maintain a contact gap with the tripping connecting rod, the moving iron core, the striker, the magnetic spring, and the static iron core are all arranged inside the electromagnetic coil, and the electromagnetic coil is used to provide an electromagnetic field force when current passes through. When a large current passes through the electromagnetic coil, the electromagnetic field force pushes the moving iron core to overcome the elastic force of the magnetic spring and move toward the static iron core, and drives the striker to move so that the contact gap is eliminated and then strikes the tripping connecting rod to achieve tripping, characterized in that Includes: at least one energy storage module, a selection switch, and a control circuit. The energy storage module is connected to the electromagnetic coil via the selection switch; When powered on, the energy storage module is charged, and the control circuit controls the selection switch to disconnect the energy storage module from the electromagnetic coil; After power is cut off, the control circuit controls the selection switch to connect the circuit of the energy storage module and the electromagnetic coil. The discharge of the energy storage module enhances the electromagnetic field force in the electromagnetic coil. The electromagnetic field force pushes the moving iron core to overcome the elastic force of the magnetic spring and move toward the static iron core, and drives the striker to move so that the contact gap is eliminated and then hits the tripping link to achieve tripping.

2. A circuit breaker energy storage tripping device according to claim 1, characterized in that: The electric energy stored in the energy storage module can at least enable the striker to strike the tripping link to achieve tripping.

3. A circuit breaker energy storage tripping device according to claim 1 or 2, characterized in that: The energy storage module is a capacitor.

4. A method for circuit breaker energy storage tripping, applied to the circuit breaker energy storage tripping device according to any one of claims 1 to 3, characterized in that: include: After power failure, the stored electrical energy is released, causing a large current to flow through the electromagnetic release; When a large current flows through the electromagnetic release, an electromagnetic field force is generated; The electromagnetic field force drives the tripping mechanism in the electromagnetic release to achieve tripping.

5. A circuit breaker energy storage tripping method according to claim 4, characterized in that: include: The large current is at least greater than the maximum current that flows through the electromagnetic release when normally powered on and does not cause the electromagnetic release to trip.

6. A circuit breaker energy storage tripping method according to claim 4, characterized in that: include: When power is turned on, the module for storing electric energy is disconnected from the circuit of the electromagnetic release, and the module for storing electric energy is charged in the circuit.

Images