Novel magnetic control quick-acting pole-mounted circuit breaker
By designing an emergency closing control unit and a bridge drive circuit in the magnetically controlled pole-mounted circuit breaker, combined with semi-hard magnetic materials and a vertically distributed structure, the problem of rapid emergency operation of the magnetically controlled pole-mounted circuit breaker in the event of power failure or controller failure is solved, thereby improving the stability and reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-31
AI Technical Summary
Existing magnetically controlled pole-mounted circuit breakers have difficulty quickly performing emergency opening and closing operations in the event of power failure or controller malfunction.
The design includes an emergency closing control unit, comprising a power supply module, a CPU module, and a drive module. Utilizing a bridge drive circuit and a power-taking capacitor, the emergency closing control box directly supplies power to the excitation coil of the magnetic control mechanism under abnormal conditions, enabling opening and closing operations. Furthermore, the design incorporates semi-hard magnetic materials, a vertically distributed magnetic control mechanism, and an arc-extinguishing chamber structure to enhance system stability and reliability.
It enables rapid emergency opening and closing operations in the event of power failure or controller malfunction, improves the dynamic response performance and mechanical reliability of the system, extends the service life of capacitors, and ensures the stable operation of the circuit breaker.
Smart Images
Figure CN224067618U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of pole-mounted circuit breaker, specifically, a novel magnetic control quick-acting pole-mounted circuit breaker. BACKGROUND
[0002] The pole-mounted circuit breaker is widely applied due to the short action time, small driving current, simple mechanism structure and rich box space;
[0003] In order to ensure that the magnetic control pole-mounted circuit breaker can be normally opened and closed under abnormal conditions, a manual emergency opening and closing lever or button is usually arranged on the magnetic control pole-mounted circuit breaker. SUMMARY
[0004] The utility model discloses a novel magnetic control quick-acting pole-mounted circuit breaker to solve the problem that the magnetic control mechanism in the existing magnetic control pole-mounted circuit breaker is difficult to quickly realize emergency opening and closing operation under the condition of power failure or controller failure.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] A novel magnetic control quick-acting pole-mounted circuit breaker, comprising a magnetic control pole-mounted circuit breaker provided with a magnetic control mechanism, an excitation coil connected with a power supply is arranged on the magnetic control mechanism, and the magnetic control pole-mounted circuit breaker is further provided with an emergency closing control unit, the emergency closing control unit comprises an energy supply module, a CPU module and a driving module, the output end of the CPU module is connected to the input end of a photoelectric coupler, the output end of the photoelectric coupler is connected to the input end of the driving module, the energy supply module is connected with the driving module and is used for supplying power for the driving module, and the driving module is connected with the excitation coil through wires.
[0007] Since the magnetic control pole-mounted circuit breaker is usually arranged at a high position, it is difficult to quickly realize emergency closing operation of the magnetic control pole-mounted circuit breaker when the magnetic control mechanism in the circuit breaker loses power or the controller fails, the emergency closing control box is arranged, the CPU module in the emergency closing control box is used to control the driving module to directly supply power to the excitation coil of the magnetic control mechanism when the magnetic control pole-mounted circuit breaker loses power or the controller fails, and then the excitation coil is magnetized or demagnetized, thereby realizing opening and closing operation of the magnetic control mechanism under abnormal state.
[0008] Further, the driving module is a bridge type driving circuit.
[0009] The bridge drive circuit is used as the drive circuit, compared with other drive circuits, the bridge drive circuit can improve the efficiency of power transmission, reduce power loss, and improve the efficiency of power transmission; at the same time, the bridge drive circuit has good control performance, by accurately controlling the on-off time and frequency of the power switch, the accurate control of current and voltage can be realized, so as to meet the needs of different loads and improve the dynamic response performance of the system.
[0010] Further, the energy supply module is a first power taking capacitor.
[0011] The power taking capacitor is used as the energy supply device of the magnetic control circuit breaker, which can stably provide the required power, prevent unstable power supply caused by power supply fluctuation or noise, and ensure the normal operation of the circuit breaker; at the same time, because the capacitor can store a part of the electric energy, it can still continue to provide power supply when power failure occurs, which plays a certain backup role and ensures the stability and reliability of the system.
[0012] Further, the first power taking capacitor is connected with a charging power supply.
[0013] The charging power supply is arranged to supply power to the emergency closing control unit, which does not directly take power from the power distribution line, reduces the coupling degree of the emergency closing control unit and the circuit breaker, and reduces the influence of the power distribution line or the entire magnetic control column circuit breaker on it, wherein the charging power supply can adopt the existing intermittent charging mode, which can reduce the charging frequency of the capacitor, reduce the working pressure and temperature of the capacitor, thereby reducing the aging degree of the power taking capacitor and prolonging its service life.
[0014] Further, the emergency closing control unit is connected with an indicator light.
[0015] The indicator light is arranged to determine whether the power taking capacitor in the emergency closing control unit has enough electric energy, so as to ensure that the device is in normal working state.
[0016] Further, the static iron core and the moving iron core in the magnetic control mechanism are made of semi-hard magnetic material.
[0017] The semi-hard magnetic material has higher coercive force, and its magnetization intensity can quickly recover to zero under the action of an external magnetic field. This feature makes the semi-hard magnetic material have better stability and controllability when applied to the magnetic control circuit breaker, and at the same time, the loss of magnetic performance is smaller after being affected by the external magnetic field, and has better anti-magnetic deformation. This makes the magnetic control circuit breaker maintain stable performance during long-term use.
[0018] Further, the magnetic control column circuit breaker is provided with a solid sealed pole, a second power taking capacitor is fixedly arranged in the solid sealed pole, and the two ends of the second power taking capacitor are respectively connected with a power supply and an exciting coil and supply power to the exciting coil.
[0019] By embedding the power-taking capacitor of the magnetically controlled circuit breaker into the solid-sealed pole, the overall structure of the device becomes more compact, thereby improving the device's integration.
[0020] Furthermore, the magnetically controlled pole-mounted circuit breaker also includes an arc-extinguishing chamber equipped with a moving contact and a stationary contact. The magnetic control mechanism and the arc-extinguishing chamber are both fixed inside the solid-sealed pole and distributed vertically. The magnetic control mechanism is connected to the moving contact through an insulating pull rod and drives the contact and separation of the moving contact and the stationary contact based on magnetic force.
[0021] By vertically distributing the magnetic control mechanism and the arc-extinguishing chamber, the magnetic control part and the arc-extinguishing part of the circuit breaker are effectively separated, allowing each part to perform at its best. This makes the circuit breaker structure on the entire magnetic control column compact and applicable to a wider range of scenarios. Furthermore, the magnetic control mechanism directly drives the arc-extinguishing chamber, reducing intermediate links and ensuring high mechanical reliability.
[0022] The manual emergency closing device is a separate device located outside the switch body. The enclosure is fixedly installed on the magnetic control column below the circuit breaker and at a height of less than 2 meters from the ground.
[0023] Furthermore, the magnetically controlled column circuit breaker is also fixedly equipped with a current and voltage sensor, and the signal receiving end of the current and voltage sensor is connected to the conductive circuit of the magnetic control mechanism.
[0024] By adding current and voltage sensors, the current and voltage parameters on the circuit breaker can be monitored to improve the functionality of the device.
[0025] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:
[0026] (1) The present invention provides a novel magnetically controlled fast-acting pole-mounted circuit breaker. By setting up an emergency closing control box, when the magnetically controlled pole-mounted circuit breaker loses power or the controller fails, the CPU module in the emergency closing control box is used to control the drive module to directly supply power to the excitation coil of the magnetic control mechanism, thereby energizing or de-energizing the excitation coil, and realizing the opening and closing operation of the magnetic control mechanism under abnormal conditions.
[0027] (2) The novel magnetically controlled fast-acting pole-mounted circuit breaker provided by this utility model effectively separates the magnetic control part and the arc-extinguishing part of the circuit breaker by vertically distributing the magnetic control mechanism and the arc-extinguishing chamber; and the magnetic control mechanism directly drives the arc-extinguishing chamber, with fewer intermediate links and high mechanical reliability. Attached Figure Description
[0028] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof.
[0029] Figure 1This is a schematic diagram of the emergency closing control unit in this utility model;
[0030] Figure 2 This is a schematic diagram of the structure of the novel magnetically controlled fast-acting pole-mounted circuit breaker in this utility model;
[0031] Figure 3 This utility model Figure 2 A schematic diagram of the cross-sectional structure;
[0032] Among them, 1-solid-sealed pole, 2-arc extinguishing chamber, 3-wire clamp, 4-flexible connection, 5-conductive rod, 6-insulating pull rod, 7-voltage sampling sensor, 8-magnetic control mechanism, 9-manual tripping device, 10-box welding parts, 11-current and voltage sensor, 12-outgoing terminal, 13-incoming terminal. Detailed Implementation
[0033] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of this utility model and the features within them can be combined with each other.
[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0035] Example 1
[0036] Please refer to Figures 1-3 This utility model provides a novel magnetically controlled fast-acting pole-mounted circuit breaker, comprising a magnetically controlled pole-mounted circuit breaker with a magnetic control mechanism. The magnetic control mechanism has an excitation coil connected to a power supply. The magnetically controlled pole-mounted circuit breaker also includes an emergency closing control unit, which includes a power supply module, a CPU module, and a drive module.
[0037] The power supply module can be a conventional 220V / 380V power supply or a long-life battery, with the long-life battery having a calendar life of over 8 years. As a preferred option, the power supply module is a first power-taking capacitor. Using a power-taking capacitor as the power supply device for driving the magnetically controlled circuit breaker can stably provide the required power, preventing unstable power supply caused by power fluctuations or noise, and ensuring the normal operation of the circuit breaker. Furthermore, the first power-taking capacitor is connected to a charging power source, which can be a solar charging power source, a portable charging power source, or a battery. By setting the charging power source to supply power to the emergency closing control unit, instead of directly drawing power from the distribution line, the coupling degree between the emergency closing control unit and the circuit breaker is reduced, minimizing its influence from the distribution network line or the entire magnetically controlled pole-mounted circuit breaker. The charging power source can adopt an existing intermittent charging mode, which can reduce the number of times the capacitor is charged, reduce the capacitor's working pressure and temperature, thereby reducing the aging of the power-taking capacitor and extending its service life.
[0038] The CPU module can be an ARM Cortex-M series microprocessor or a Huada HC32F4A0 series chip; the drive module can be a conventional control circuit. As a preferred option, the drive module adopts a bridge drive circuit. Compared with other drive circuits, the bridge drive circuit can improve the efficiency of power transmission and reduce power loss. At the same time, the bridge drive circuit has better control performance. By accurately controlling the on and off time and frequency of the power switch, accurate control of current and voltage can be achieved, thereby meeting the needs of different loads and improving the dynamic response performance of the system.
[0039] The output of the CPU module is connected to the input of the optocoupler, and the output of the optocoupler is connected to the input of the drive module. The power supply module is connected to the drive module and is used to supply power to the drive module. The drive module is connected to the excitation coil through a wire. The signal transmission between the modules can adopt a serial communication protocol or an Ethernet communication protocol.
[0040] When the magnetic control mechanism of the magnetic control pole circuit breaker experiences power failure or controller malfunction, the operator can control it locally or remotely. The CPU sends a command signal, which is transmitted backward through the optocoupler. This signals the power supply module supplies power to the drive module and outputs a pulse voltage, which acts on both ends of the excitation coil, thereby controlling the opening and closing operation of the magnetic control mechanism.
[0041] As a preferred embodiment, the emergency closing control unit is built into a housing, which can be made of plastic or metal. The housing is fixedly installed below the magnetically controlled circuit breaker on the pole and at a height of less than 2 meters from the ground. The housing provides protection and improves the service life of the device. At the same time, placing the housing on the pole where the magnetically controlled circuit breaker is located and close to the ground facilitates operation by personnel. In addition, the emergency closing control unit is connected to an indicator light, which can be a conventional light bulb or an LED, to determine whether the power-taking capacitor in the emergency closing control unit has sufficient power, thereby ensuring that the device is in normal working condition.
[0042] As a preferred embodiment, both the stationary and moving iron cores in the magnetic control mechanism are made of semi-hard magnetic materials. These semi-hard magnetic materials can be martensitic magnets or two-phase split alloys. The higher coercivity of semi-hard magnetic materials allows their magnetization to quickly recover to zero under the influence of an external magnetic field. This characteristic gives semi-hard magnetic materials better stability and controllability when applied to magnetically controlled circuit breakers. Furthermore, they exhibit less magnetic performance loss and better resistance to magnetic deformation after being affected by an external magnetic field. This ensures that the magnetically controlled circuit breaker maintains stable performance during long-term use.
[0043] like Figure 3 As shown, the main body of the novel magnetically controlled fast-acting pole-mounted circuit breaker consists of a solid-sealed pole 1, an arc-extinguishing chamber 2, a current and voltage sensor 11, an incoming terminal 13, an outgoing terminal 12, a conductive clamp 3, a flexible connection 4, and a conductive rod 5. The solid-sealed pole 1 is composed of epoxy resin as the matrix and silicone rubber as the outer coating. It serves as the main insulating structure of the breaking element, supporting the breaking element from being damaged under the action of electrodynamic force. The second power-taking capacitor is fixedly installed inside the solid-sealed pole. The two ends of the second power-taking capacitor are connected to the power supply and the excitation coil, respectively, and supply power to the excitation coil. By embedding the power-taking capacitor of the magnetically controlled pole-mounted circuit breaker inside the solid-sealed pole, the overall structure of the device becomes more compact, thereby improving the integration of the device.
[0044] The arc-extinguishing chamber 2, as the core component of the circuit breaker, is used to interrupt load current, short-circuit current, and fault current generated by line grounding faults or short-circuit faults. The voltage sensor in the current and voltage sensor 11 adopts a thin-film capacitor, and the current sensor adopts an LPCT, or an existing device integrating current and voltage sensors can be used. The signal receiving end of the current and voltage sensor 11 is connected to the conductive circuit of the magnetic control mechanism 8 to collect the voltage and current signals in the circuit breaker on the magnetic control column. The conductive clamp 3, the incoming terminal 13, the outgoing terminal 12, and the conductive rod 5 are all made of copper, forged and silver-plated, and form the main conductive circuit of the device with a soft connection made of copper foil. The insulating pull rod 6 is composed of carbon steel and SMC insulating material and is used for transmission between the magnetic control mechanism and the arc-extinguishing chamber and for insulation to ground.
[0045] The magnetic control mechanism 8 consists of a moving iron core, a stationary iron core, and a coil inside the stationary iron core. It is the core component for the circuit breaker to achieve rapid disconnection. The magnetic control mechanism 8 is connected to the moving contact of the arc-extinguishing chamber 2 via an insulating pull rod 6. When the excitation coil is energized, it is either magnetized or demagnetized, which drives the moving iron core of the mechanism to move. The moving iron core drives the insulating pull rod 6 to connect or disconnect the moving contact of the arc-extinguishing chamber 2, realizing the closing and opening operation of the circuit breaker. The magnetic control mechanism directly drives the arc-extinguishing chamber, with fewer intermediate links and higher mechanical reliability. As a preferred solution, both the magnetic control mechanism (inside the housing) and the arc-extinguishing chamber are fixed in the solid-sealed pole column and distributed vertically. By vertically distributing the magnetic control mechanism and the arc-extinguishing chamber, the magnetic control part and the arc-extinguishing part of the circuit breaker are effectively separated, allowing each to perform at its best while making the circuit breaker structure on the entire magnetic control column compact and applicable to a wider range of scenarios.
[0046] During operation, power is supplied to both ends of the coil through the capacitor. When the coil is energized, it generates an attractive force, simultaneously magnetizing the moving and stationary iron cores. The coil's excitation and magnetization time is fixed. When the coil is de-energized, the magnetic force generated by the magnetization of the moving and stationary iron cores keeps them attracted and held in place. Simultaneously, this drives the insulating rod, causing the moving and stationary contacts of the arc-extinguishing chamber to contact and compress the contact spring, thus holding the switch in the closed position. When an opening operation is required, a reverse alternating current is applied to the opening and closing circuit. The coil generates a reverse magnetic field, weakening the magnetic holding capability of the moving and stationary iron cores. When the attracting and holding force is less than the combined reaction force of the contact spring and the opening spring, the moving contact of the switch actuates until it reaches the open position, where the opening spring holds the moving iron core in the open position.
[0047] In this utility model, the chips or modules are all existing modules in the prior art, and the programs or codes stored in the chips are all existing programs or codes. The methods corresponding to these codes are also existing methods in the prior art. This utility model is a utility model that utilizes these existing chips and applies them to a new type of magnetically controlled fast-acting pole-mounted circuit breaker.
[0048] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0049] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A novel magnetic control quick action pole circuit breaker comprising a magnetic control pole circuit breaker provided with a magnetic control mechanism, said magnetic control mechanism being provided with an exciting coil connected with a power source, characterized in that, The magnetic control column on-break switch is further provided with an emergency closing control unit, the emergency closing control unit comprises a power supply module, a CPU module and a driving module, an output end of the CPU module is connected to an input end of an optical coupler, an output end of the optical coupler is connected to an input end of the driving module, the power supply module is connected with the driving module and is used for supplying power for the driving module, and the driving module is connected with the exciting coil through a wire.
2. A novel magnetic latching miniature molded case circuit breaker as claimed in claim 1, wherein, The driving module is a bridge type driving circuit.
3. A novel magnetic latching miniature circuit breaker according to claim 1, wherein, The power supply module is a first power taking capacitor.
4. A novel magnetic latching miniature circuit breaker according to claim 3, wherein, The first power taking capacitor is connected with a charging power supply.
5. A novel magnetic latching miniature circuit breaker as claimed in claim 1, wherein, The emergency closing control unit is connected with an indicating lamp.
6. A novel magnetic latching miniature circuit breaker according to claim 1, wherein, Both the static iron core and the dynamic iron core in the magnetic control mechanism adopt semi-hard magnetic materials.
7. A novel magnetic latching miniature circuit breaker as claimed in claim 1, wherein, The magnetic control column on-break switch is provided with a solid sealed pole, a second power taking capacitor is fixedly arranged in the solid sealed pole, and two ends of the second power taking capacitor are respectively connected with a power supply and the exciting coil and are used for supplying power for the exciting coil.
8. A novel magnetic latching miniature circuit breaker according to claim 7, wherein, The magnetic control column on-break switch further comprises an arc extinguishing chamber provided with a moving contact and a static contact, the magnetic control mechanism and the arc extinguishing chamber are fixed in the solid sealed pole and are distributed in the vertical direction, the magnetic control mechanism is connected with the moving contact through an insulating pull rod and drives the moving contact to contact and separate from the static contact based on magnetic force.
9. A novel magnetic latching miniature circuit breaker according to claim 1, wherein, The emergency closing control unit is built in a box, the box is fixedly arranged below the magnetic control column on-break switch and is less than 2 meters away from the ground.
10. A novel magnetic latching miniature circuit breaker according to claim 1, wherein, The magnetic control column on-break switch is further fixedly provided with a current voltage sensor, and a signal receiving end of the current voltage sensor is connected with a conductive loop of the magnetic control mechanism.