WO2014067174A1

WO2014067174A1 - Low-voltage ac/dc control and protection for electrical appliance

Info

Publication number: WO2014067174A1
Application number: PCT/CN2012/084520
Authority: WO
Inventors: 缪希仁; 鲍光海; 刘向军; 吴功祥; 杨明发; 江和; 张培铭
Original assignee: 福州大学
Priority date: 2012-10-30
Filing date: 2012-11-13
Publication date: 2014-05-08
Also published as: CN102931032A; DE112012007068T5; CN102931032B; DE112012007068B4

Abstract

A low-voltage AC/DC control and protection for electrical appliance, comprising: a closing flat coil (A) , a metal disk (B), an opening flat coil (E), a shaft (G), a magnetic enhancement board (K), a buffer (X), a control circuit (F), a voltage regulation circuit (Y), a capacitor (C1, C2), a power electronic device (D1, D2, D3, D4), a making and breaking location holding mechanism (H), a shaft sleeve (L), a moving contact bridge bracket (N) and a dual-break contact arc extinguishing system (I).According to the different requirements of normal making and breaking, and breaking in a failure state of the circuit, the control circuit (F) controls the capacitor (C1, C2) to respectively discharge to the closing flat coil (A) and the opening flat coil (E) via the power electronic device (D1, D2, D3, D4) according to the designed optimization control time, the magnetic enhancement board (K) greatly enhances the magnetic field, the metal disk (B) drives the shaft (G) to move under the action of strong electromagnetic repulsion, and the shaft (G) drives electrical appliance contacts to realize rapid making and breaking of the circuit in normal and failure states, thereby replacing the existing conventional electromagnet or motor actuation mechanism and the mechanical actuation mechanism.The low-voltage AC/DC control and protection for electrical appliance has the function of controlling the normal making and breaking of the electrical appliance, electrical appliance fault protection functions including a short circuit fault protection function, and a voltage dip resisting function, rapid action can be realized, the performance index of the electrical appliance can be greatly improved, and has the characteristics of a simplified structure, reduced volume and increased working flux.

Description

Low-voltage AC and DC control and protection appliances

The invention relates to a low-voltage AC/DC control and protection appliance, belonging to the field of low-voltage electrical appliances.

Background technique

At present, low-voltage electrical products mainly include two types of control appliances and protective appliances. Control appliances are further divided into AC control appliances and DC control appliances. Protection appliances are divided into AC protection appliances and DC protection appliances. Because control appliances and protection appliances are separate. For the control and protection of the circuit, it is necessary to install the control electric appliance and install the protective electric appliance. It needs a set of control electric machine action mechanism and the contact arc extinguishing system. It also needs a set of action mechanism for protecting the electric appliance and the contact arc extinguishing system. To realize the intelligentization requires two sets of separate control systems, all of which not only make the two operations difficult to cooperate well, it is difficult to improve their performance, resulting in great economic and functional waste, resulting in complex structure, large size, and large installation area. High cost; At present, all low-voltage electrical appliances use electromagnet or motor action mechanism or mechanical action mechanism, the action mechanism of the contactor adopts electromagnet action mechanism, and the circuit breaker action mechanism adopts mechanical action mechanism or motor action mechanism or both. Yes, because these action mechanisms operate at a small speed Slow motion, you can not improve its performance control and protection, this is a problem of low voltage AC and DC control and protection of electrical second serious problem. At present, the low-voltage integrated electrical appliance with contactor control function and circuit breaker protection function is also integrated with the control electrical structure and the protective electrical structure. These traditional motion mechanisms still have the above-mentioned serious problems, such as the application of the rapid electromagnetic repulsive force by Qi Xiren et al. The system's split-phase intelligent low-voltage double-breakpoint integrated electrical device "patent, although the use of a set of contact arc extinguishing system, has achieved functional and structural integration, but still uses the electromagnet system and the two sets of action of the fast electromagnetic repulsive mechanism The mechanism adopts the quick release of the action mechanism under the action of the fast electromagnetic repulsive mechanism to realize the rapidity of the short-circuit fault protection. The electromagnet system is still used in the normal connection and disconnection, and the fast connection and disconnection cannot be realized, and the rapid electromagnetic repulsive force of the scheme is adopted. The organization did not consider measures to increase the magnetic flux generated by the flat coil to increase the electromagnetic repulsion or reduce the burden of the capacitor; for example, Zhang Peiming et al. patent "an intelligent AC contactor" (patent number ZL00214192. 2), the scheme controls The first open phase contact is small before the current crosses zero Internally open, the current is interrupted when the first open phase current crosses zero, and then the other two non-first open phase contacts are controlled to lag about 5ms to open, thereby realizing three-phase contact zero current breaking (the concept is actually micro-arc energy breaking), the technology The difficulty is the accuracy and stability of the first open phase contact breaking. Because the action speed of the traditional electric electromagnet action mechanism is slow, the switch-on and break-off time is long, and the mechanism action is seriously dispersed. The performance of zero-voltage on-off and zero-current disconnection cannot be guaranteed; the existing electrical products do not have the function of resisting voltage drop. Very few studies have proposed to increase the anti-voltage drop function. In order to increase the anti-voltage drop function, many measures must be taken, such as , Liu Xiangjun and other patented technology "AC/DC universal voltage drop-proof contactor controller" (publication number: CN201584367. U); In addition, low-voltage control appliances are characterized by frequent operation, requiring high electrical life and mechanical life. Therefore, in addition to requiring the action speed of the electrical appliance to be fast, the action mechanism is required to have a small impact energy, and the control and protection electrical appliance must take into consideration the high electrical life and mechanical life of the normal connection and disconnection, and must meet the requirements of high short-circuit breaking capacity. This is a key issue that must be considered for controlling and protecting electrical appliances. To this end, the present invention proposes a new low-voltage AC-DC control and protection appliance. The control circuit of the appliance can control the corresponding capacitor according to the different requirements of the circuit under normal connection, disconnection and fault state, and control the corresponding capacitor according to the optimized control time of the design. Discharge the closing plate coil and the opening plate coil respectively, the magnetizing plate greatly enhances the magnetic field, and the metal disk drives the axis movement under the action of strong electromagnetic repulsion. As a low-voltage AC-DC control and protection device, the shaft drives the electric appliance through the movable contact bridge bracket. The contact bridge and the moving contact realize fast switching on and off of different requirements under normal and fault conditions of the circuit, so as to realize fast action and ensure that the impact energy at the end of the operation is small; fast switching and breaking can be realized in normal turning on and off, Significantly reduce the dispersibility of the action, it can realize the zero voltage connection and zero current breaking of the appliance; after the fault includes the short circuit fault, it can quickly realize the high short circuit breaking capacity and strong current limiting characteristic; the voltage drop occurs in the circuit When it has a voltage drop resistance function; the appliance has only one set of contact arc extinguishing system Only one set of fast action mechanism can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism. It has the function of controlling the normal connection and disconnection of the electrical appliance and protecting the electrical appliance, including short-circuit fault protection function, and has anti-voltage drop. The function can greatly improve the electrical performance index, expand the electrical work function, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

Summary of the invention

The object of the present invention is to provide a low-voltage AC-DC control and protection appliance, a shaft-driven electrical moving contact system on a metal disk. Under the control of the control circuit, the power source quickly charges the two sets of capacitors through the power electronic device, and the electrical appliance is required to be normal. When switching on and off, under the control of the control circuit, a set of capacitors is quickly discharged to the closing plate coil and the opening plate coil by the power electronic device according to the optimized control time of the design, and the magnetizing plate greatly enhances the magnetic field, and the electromagnetic repulsion is strong. Under the action, the metal plate moves to the opening plate coil and the closing plate coil respectively, and the shaft on the metal plate drives the dynamic contact bridge bracket and the moving contact system to quickly turn on or off, completing the circuit connection and breaking task, realizing Both fast action and guaranteed end impact energy is small, The low-voltage AC-DC control and protection device relies on the switch-on and break-off position maintaining mechanism to keep the appliance connected and disconnected, the fast action of the normal switch-on and break-off process, and greatly reduce the dispersion of the action, and the zero-voltage connection of the contact system can be realized. In the event of a short-circuit fault, under the control of the control circuit, the two sets of capacitors discharge the shutter coil very quickly through the power electronics, and the magnetizing plate greatly enhances the magnetic field, in the more powerful electromagnetic repulsive force. Under the action, the metal plate overcomes the magnet suction force to move more quickly to the closing plate coil, and the dynamic and static contacts are quickly separated, so that the contact system quickly breaks the short-circuit current, and the low-voltage AC-DC control and protection device maintains the connection and the disconnection position. The mechanism ensures that the metal disk drives the moving contact system to maintain the position of the breaking, and completes the short-circuit protection task; when detecting the voltage drop of the circuit, the control circuit can discharge the capacitor to the opening plate coil according to the required delay, and the contact delay Action, with anti-voltage drop function; the appliance has only one set of contacts The system has only one set of fast action mechanism, which can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism. It has the function of controlling the normal connection and disconnection of the electrical appliance and protecting the electrical appliance, including short-circuit fault protection function, with anti-voltage drop. The function can greatly improve the performance index of electrical appliances, expand the working function of electrical appliances, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

An implementation of the present invention is: It comprises a closing plate coil, a metal plate, a shutter plate coil, a shaft, a magnetizing plate, a buffering member, a control circuit, a voltage adjusting circuit, a capacitor C1, a capacitor C2, a power electronic device D1, and a power supply. The electronic device D2, the power electronic device D3, the power electronic device D4, the on and off position maintaining mechanism, the sleeve, the movable contact bridge bracket and the double break point contact arc extinguishing system are characterized in that: one end of the power source is connected to the voltage adjusting circuit At the input end, the other end of the power supply is connected to the other input end of the voltage adjusting circuit, the positive terminal of the voltage adjusting circuit is connected to the collector of the power electronic device D4, and the emitter of the power electronic device D4 is respectively connected with the collector of the power electronic device D3, the positive electrode of the capacitor C1, The seventh interface of the control circuit is connected, and the emitter of the power electronic device D3 is respectively connected with the collector of the power electronic device D1, the collector of the power electronic device D2, the positive terminal of the capacitor C2, and the fifth interface of the control circuit, and the emitter of the power electronic device D1 Receiving the first interface of the closing flat coil and the control circuit, the power electronic device D2 emitter is connected One end of the brake plate coil and the control circuit interface 3, the negative terminal of the voltage adjustment circuit output terminal is respectively connected with the negative electrode C1, the negative electrode C2, the other end of the closing plate coil, and the other end of the opening plate coil, and the second interface of the control circuit and the electric power The control terminal of the electronic device D1 is connected, the fourth interface of the control circuit is connected to the control electrode of the power electronic device D2, the sixth interface of the control circuit is connected with the control electrode of the power electronic device D3, and the eighth interface of the control circuit and the power electronic device The D4 control pole is connected, and the closing flat coil and the opening flat coil are respectively mounted on two sides of the metal disc; The opening and closing position maintaining mechanism is respectively mounted on the metal plate, the opening plate coil and the closing plate coil, or is installed between the metal plate and the fixed parts of the electric appliance, or is mounted on the movable contact bridge bracket and the fixed parts of the electric appliance. Between, or installed between the shaft and the non-moving parts of the electrical appliance; the two bushings are respectively mounted on the closing plate coil, the opening plate coil, the magnetizing plate and the buffering member, the shaft is fixed on the metal plate, the shaft and the movable contact The bridge bracket is connected, the movable contact bridge bracket is connected with the dynamic contact bridge of the double break point contact arc extinguishing system, the movable contact is mounted on the movable contact bridge, the static contact is installed on the static contact bridge, and the arc extinguishing device is placed at the dynamic touch The outer side of the head and the stationary contact, the shaft passes through the sleeve of the closing flat coil and the opening flat coil, and the two magnetizing plates are respectively mounted on the side of the closing flat coil away from the metal disc and the separated flat coil away from the metal disc On one side, two buffer members are respectively mounted on one side of the two magnetization plates away from the closing plate coil and the opening plate coil.

Another implementation manner of the present invention includes: a closing plate coil, a metal plate, a shutter plate coil, a shaft, a magnetizing plate, a buffering member, a control circuit, a voltage adjusting circuit, a capacitor C1, a capacitor C2, a power electronic device D1, and a power supply. Electronic device D2, power electronic device D3, power electronic device D4, turn-on and break position maintaining mechanism, bushing, dynamic contact bridge bracket and double break point contact arc extinguishing system;

The utility model is characterized in that: one end of the power source is connected to the input end of the voltage adjusting circuit, the other end of the power source is connected to the other input end of the voltage adjusting circuit, the positive terminal of the voltage adjusting circuit is connected to the collector of the power electronic device D4, and the emitter of the power electronic device D4 is respectively The collector of the power electronic device D3, the positive terminal of the capacitor C1, and the seventh interface of the control circuit are connected, and the emitter of the power electronic device D3 is respectively connected to the emitter of the power electronic device D2, the end of the shutter coil, and the third interface of the control circuit. The negative pole of the capacitor C1 is connected to the cathode of the capacitor C2, the collector of the power electronic device D1, and the collector of the power electronic device D2, and the emitter of the power electronic device D1 is connected to the first interface of the closing flat coil and the control circuit, and the output of the voltage adjusting circuit The negative pole is respectively connected to the negative pole of the capacitor C2, the other end of the closing flat coil, and the other end of the shutter coil, and the second interface of the control circuit is connected with the control pole of the power electronic device D1, and the fourth interface of the control circuit and the power electronic device D2 The control pole is connected, and the sixth interface of the control circuit is connected to the control pole of the power electronic device D3, and the control The eighth interface of the road is connected to the control pole of the power electronic device D4, and the closing flat coil and the opening flat coil are respectively mounted on both sides of the metal disc; the connecting and disconnecting position maintaining mechanism are respectively mounted on the metal disc and the opening flat coil And the closing plate coil, or between the metal plate and the fixed parts of the electric appliance, or between the movable contact bridge bracket and the fixed parts of the electric appliance, or between the shaft and the stationary parts of the electric appliance; The sleeves are respectively installed on the closing plate coil, the opening plate coil, the magnetizing plate and the buffering member, the shaft is fixed on the metal plate, the shaft is connected with the movable contact bridge bracket, the movable contact bridge bracket and the double break point contact arc extinguishing system Dynamic bridge connection, moving contacts are mounted On the movable contact bridge, the static contact is mounted on the static contact bridge, the arc extinguishing device is disposed on the outer side of the movable contact and the static contact, the shaft passes through the sleeve of the closing flat coil and the opening flat coil, and the two magnetization The plates are respectively mounted on one side of the closing plate coil away from the metal plate and the side of the opening plate coil away from the metal plate, and the two buffer members are respectively mounted on one side of the two magnetizing plates away from the closing plate coil and the opening plate coil.

Another implementation manner of the present invention is: a low-voltage AC-DC control and protection device, including a closing plate coil, a metal plate, a shutter plate coil, a shaft, a magnetization plate, a buffer member, a control circuit, a voltage adjustment circuit, and a capacitor C2. , power electronic device Dl, power electronic device D2, power electronic device D3, turn-on and break position maintaining mechanism, bushing, dynamic contact bridge bracket and double break point contact arc extinguishing system;

The utility model is characterized in that: one end of the power source is connected to the input end of the voltage adjusting circuit, the other end of the power source is connected to the other input end of the voltage adjusting circuit, the positive end of the voltage adjusting circuit is connected to the collector of the power electronic device D3, and the emitter of the power electronic device D3 is respectively The power electronic device D1 collector, the power electronic device D2 collector, the capacitor C2 positive electrode, the fifth interface of the control circuit are connected, the power electronic device D1 emitter is connected to the first interface of the closing flat coil and the control circuit, the power electronic The emitter of the device D2 is connected to the third interface of the end of the opening plate coil and the control circuit, and the negative terminal of the output of the voltage adjusting circuit is respectively connected with the negative pole of the capacitor C2, the other end of the closing flat coil, and the other end of the shutter coil, and the control circuit The second interface is connected to the control electrode of the power electronic device D1, the fourth interface of the control circuit is connected to the control pole of the power electronic device D2, the sixth interface of the control circuit is connected with the control pole of the power electronic device D3, and the flat coil is closed The opening and closing plate coils are respectively mounted on both sides of the metal plate; the opening and closing position maintaining machine The structure is respectively installed on the metal plate, the opening plate coil and the closing plate coil, or is installed between the metal plate and the fixed parts of the electric appliance, or is installed between the movable contact bridge bracket and the fixed parts of the electric appliance, or is mounted on the shaft The two bushings are respectively mounted on the closing plate coil, the opening plate coil, the magnetizing plate and the buffering member, the shaft is fixed on the metal plate, and the shaft is connected with the movable contact bridge bracket, and is dynamically touched. The bridge bracket is connected with the dynamic contact bridge of the double break point contact arc extinguishing system, the movable contact is mounted on the movable contact bridge, the static contact is mounted on the static contact bridge, and the arc extinguishing device is disposed on the movable contact and the static contact On the outer side, the shaft passes through the sleeve of the closing plate coil and the opening plate coil, and the two magnetizing plates are respectively mounted on the side of the closing plate coil away from the metal plate and the side of the opening plate coil away from the metal plate, and two buffering members. Installed on one side of the two magnetization plates away from the closing plate coil and the opening plate coil.

Compared with the prior art, according to the different requirements of the operation, the shaft on the metal plate drives the movable contact system of the electric device, and the power supply is quickly charged by the power electronic device through the power electronic device under the control of the control circuit; When the electrical appliance is required to be normally switched on and off, under the control of the control circuit, a set of capacitors is designed. The optimized control time is quickly discharged by the power electronic device to respectively close the closing plate coil and the opening plate coil, and the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal plate is quickly turned to the opening plate coil and the closing plate coil respectively. Movement, the shaft on the metal plate drives the dynamic contact bridge bracket and the moving contact system to quickly turn on or off, complete the circuit connection and disconnection tasks, realize the fast action and ensure the end of the action, the impact energy is small, low-voltage AC-DC control and The protection device relies on the connection and the disconnection position maintaining mechanism respectively to ensure the position state of the metal disk-driven electrical moving contact system to be kept on and off, the quick action of the normal connection and the breaking process, and the motion dispersion is greatly reduced, and the touch can be realized. The head system is stable with zero voltage switching and zero current breaking; in the event of a short circuit fault, under the control of the control circuit, the two sets of capacitors discharge the grid coils very quickly through the power electronics, and the magnetizing plate greatly enhances the magnetic field. Under the action of more powerful electromagnetic repulsion, the metal disk overcomes the switch-on and break-off positions. The reaction force of the holding mechanism is moved more quickly to the closing plate coil, and the moving and static contacts are quickly separated, so that the contact system quickly breaks the short-circuit current and completes the short-circuit protection task; when detecting a voltage drop in the circuit, the control circuit can According to the requirements, the delay control capacitor discharges to the opening plate coil, the contact delay action, and has the function of anti-voltage drop; the invention has only one set of contact arc extinguishing system, and only one set of fast action mechanism can replace the existing conventional electromagnetic The iron or motor action mechanism and the mechanical action mechanism have the functions of controlling the normal connection and disconnection of the electrical appliance and the protection of the electrical appliance, including the short-circuit fault protection function, and have the function of resisting voltage drop, can greatly improve the electrical performance index, and expand the electrical working function, greatly simplifying Structure, energy saving, reducing volume, and greatly increasing the working flux.

The action process of the invention is: the shaft is mounted on the metal plate, and the shaft drives the movable contact system of the electric device. In the non-operating state, the on and off position maintaining mechanism ensures that the metal disk is on the side of the closing plate coil, and the moving contact system is in the disconnected state. When the electrical appliance is required to be connected, the power supply is rapidly charged by the voltage adjusting circuit under the control circuit, and the capacitor C1 and the capacitor C2 are quickly charged by the power electronic device D3 and the power electronic device D4. Under the control of the control circuit, the capacitor C2 is optimized according to the design. The control time is quickly discharged by the power electronic device D1, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the connecting and breaking position maintaining mechanism and rapidly moves toward the opening plate coil. After the metal plate approaches the opening plate coil, the low-voltage AC-DC control and protection device relies on the connection and the disconnection position maintaining mechanism to ensure that the metal disk-driven electrical moving contact system remains in the connected state state, completes the connection task, and realizes both fast action. Also ensure that the impact energy at the end of the action is small; when a normal break is required, the capacitor C2 According to the optimized control time of the design, the power-distribution panel coil is quickly discharged through the power electronic device D2, and the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal disk overcomes the reaction force of the opening and closing position maintaining mechanism and quickly closes. Flat coil direction The motion, low-voltage AC-DC control and protection device relies on the connection and disconnection position maintaining mechanism to ensure that the metal disk-driven electrical moving contact system maintains the positional state of the disconnection, completes the circuit breaking task, realizes both fast action and ensures that the impact energy at the end of the action is small; The fast action of the normal turning-on and breaking process of the invention greatly reduces the dispersibility of the action, and can realize zero voltage switching and zero current breaking of the contact system; when the control circuit detects a short circuit fault of the circuit, the control circuit controls the power electronic device D2 Conducted with the power electronic device D3, the capacitor C1 and the capacitor C2 discharge the coil of the shutter plate through the power electronic device D2 and the power electronic device D3 at the same time, and the magnetizing plate greatly enhances the magnetic field, under the action of more powerful electromagnetic repulsion The metal plate overcomes the reaction force of the closing and breaking position maintaining mechanism to quickly move toward the closing plate coil, and the moving and static contact is quickly separated, so that the contact system quickly breaks the short-circuit current, and the metal plate maintains the mechanism in the closing and breaking position. Next, ensure that the metal disk is on the side of the flat plate coil, complete short Road protection task; When detecting the voltage drop of the circuit, the control circuit can discharge the capacitor C2 to the shutter plate coil according to the required delay, and the contact delay action, and has the function of anti-voltage drop; The arc system has only one set of fast action mechanism, which can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism. It has the function of controlling the normal connection and disconnection of the electrical appliance and protecting the electrical fault, including the short-circuit fault protection function, and has anti-voltage. The drop function can greatly improve the electrical performance index, expand the electrical work function, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

DRAWINGS

1 is a schematic block diagram showing the structure of a breaking state of the present invention.

2 is a schematic block diagram showing the structure of an on state of the present invention.

FIG. 3 is a schematic side view showing the double-breakpoint contact arc extinguishing system and the dynamic contact bridge bracket of the present invention. FIG. 4 is a schematic block diagram showing the structure of a disconnection state according to Embodiment 1 of the present invention.

FIG. 5 is a schematic block diagram showing the structure of an on state according to the first embodiment of the present invention.

FIG. 6 is a schematic block diagram showing the structure of the breaking state according to the second embodiment of the present invention.

Figure 7 is a schematic block diagram showing the structure of the on state of the second embodiment of the present invention.

Figure 8 is a schematic block diagram showing the structure of the breaking state in the third embodiment of the present invention.

Figure 9 is a schematic block diagram showing the structure of the on state of the third embodiment of the present invention.

FIG. 10 is a schematic block diagram showing the structure of the breaking state in the fourth embodiment of the present invention.

Figure 11 is a schematic block diagram showing the structure of the on state of the fourth embodiment of the present invention.

Figure 12 is a schematic block diagram showing the structure of the breaking state in the fifth embodiment of the present invention. Figure 13 is a schematic block diagram showing the structure of the on state of the fifth embodiment of the present invention.

Figure 14 is a schematic block diagram showing the structure of the breaking and breaking position maintaining mechanism of the present invention. Fig. 15 is a schematic block diagram showing the structure of the on-state of the on-and-off position holding mechanism of the present invention. Fig. 16 is a schematic block diagram showing the structure of the two-break state of the opening and closing position maintaining mechanism of the present invention. Figure 17 is a schematic block diagram showing the structure of the two-on state of the on and off position maintaining mechanism of the present invention. Fig. 18 is a schematic block diagram showing the structure of the three-break state of the opening and closing position maintaining mechanism of the present invention. Fig. 19 is a schematic block diagram showing the structure of the three-on state of the on-and-off position holding mechanism of the present invention. Fig. 20 is a schematic block diagram showing the structure of the four-break state of the opening and closing position maintaining mechanism of the present invention. Figure 21 is a schematic block diagram showing the structure of the four-on state of the on and off position holding mechanism of the present invention. Fig. 22 is a schematic block diagram showing the structure of the five-break state of the on-and-off position maintaining mechanism of the present invention. Figure 23 is a schematic block diagram showing the structure of the six-break state of the on-and-off position maintaining mechanism of the present invention. detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 and FIG. 2, a low-voltage AC/DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor Cl, capacitor C2, power electronic device Dl, power electronic device D2, power electronic device D3, power electronic device D4, turn-on and break position maintaining mechanism H, bushing L, dynamic contact bridge bracket N And a double-breakpoint contact arc extinguishing system I, wherein: one end of the power source U is connected to the input terminal of the voltage adjusting circuit Y, and the other end of the power source U is connected to the other input end of the voltage adjusting circuit Y, and the output of the voltage adjusting circuit Y is positive. Connect the power electronic device D4 collector, the power electronic device D4 emitter is connected with the power electronic device D3 collector, the capacitor C1 positive electrode, the seventh interface 7 of the control circuit F, the power electronic device D3 emitter and the power electronic device D1 The collector, the power electronic device D2 collector, the capacitor C2 positive pole, the fifth interface 5 of the control circuit F are connected, the power electronic device D1 emitter is connected to the first interface 1 of the closing flat coil A-end and the control circuit F, The emitter of the power electronic device D2 is connected to the third interface 3 of the E-terminal of the opening plate coil and the control circuit F, and the negative terminal of the output terminal of the voltage adjusting circuit Y and the negative electrode and the capacitor of the capacitor C1 respectively C2 negative pole, closing the other end of the flat coil A, the other end of the opening flat coil E is connected, the second interface 2 of the control circuit F is connected to the control pole of the power electronic device D1, the fourth interface 4 of the control circuit F and the power electronic The device D2 is connected to the control pole, the sixth interface 6 of the control circuit F is connected to the control electrode of the power electronic device D3, the eighth interface 8 of the control circuit F is connected to the control pole of the power electronic device D4, and the panel coil A and the gate are closed. Brake The flat coils E are respectively mounted on both sides of the metal plate B, and the switch-on and break position maintaining mechanism H are respectively mounted on the metal plate B, the shutter plate coil E and the closing plate coil A, or are mounted on the metal plate B and the electric appliance. Between the moving parts, or between the movable contact bridge bracket N and the stationary parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two bushings L are respectively mounted on the closing flat coil A, opening On the flat coil E, the magnetizing plate K and the buffering member X, the shaft G is fixed on the metal disk B, the shaft G is connected with the movable contact bridge bracket N, and the dynamic contact bridge bracket N and the double break point contact arc extinguishing system I are moved. The contact bridge II is connected, the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, and the arc extinguishing device 15 is disposed on the outer side of the movable contact 12 and the fixed contact 13, and the shaft G is worn. The closing plate coil A and the bushing L of the opening plate coil E are respectively mounted on the side of the closing plate coil A away from the metal plate B and the side of the opening plate coil E away from the metal plate B. Two buffering members X are respectively installed on one side of the two magnetizing plates K away from the closing plate coil A and the opening plate coil E

As shown in Fig. 3, a double-breakpoint contact arc extinguishing system I and a dynamic contact bridge bracket N for low-voltage AC-DC control and protection appliances, including a dynamic contact bridge II of a double-breakpoint contact arc extinguishing system I, dynamic contact The head 12, the static contact 13, the static contact bridge 14, the arc extinguishing device 15 and the dynamic contact bridge bracket N are characterized in that: the movable contact bridge bracket N is connected with the movable contact bridge II, and the movable contact bridge bracket N drives the movable contact bridge II. The movable contact 12 is moved, and the arc extinguishing device 15 is disposed on both sides of the movable contact 12 and the fixed contact 13.

From Fig. 1, Fig. 2 and Fig. 3, the shaft is mounted on the metal plate, and the shaft drives the movable contact system. In the non-operating state, the switch-on and the position-maintaining mechanism ensure that the metal disk is on the side of the closing plate coil, and the moving contact system In the state of disconnection; when the electrical appliance is required to be turned on, the power supply is rapidly charged by the voltage adjusting circuit under the control circuit, and the capacitor C1 and the capacitor C2 are quickly charged by the power electronic device D3 and the power electronic device D4. Under the control of the control circuit, the capacitor C2 is pressed. The optimized control time of the design is quickly discharged by the power electronic device D1, and the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal plate overcomes the reaction force of the connecting and disconnecting position maintaining mechanism to quickly open the slab After the coil is moved, the metal disk approaches the opening plate coil, and the low-voltage AC-DC control and protection device relies on the connection and the disconnection position maintaining mechanism to ensure the position of the metal disk-driven electrical contact bridge and the movable contact system remain connected. Turn on the task, realize both fast action and ensure that the impact energy at the end of the action is small; when the normal break is required According to the optimized control time of the design, the capacitor C2 quickly discharges the shutter coil through the power electronic device D2, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the connecting and disconnecting position maintaining mechanism. Movement in the direction of the closing plate coil, low-voltage AC-DC control and protection appliances rely on the connection and disconnection position maintenance mechanism The metal disk drives the electric movable bridge bracket and the movable contact system to maintain the position state of the breaking, completes the circuit breaking task, realizes both the fast action and the end of the action, and the impact energy is small; the fast action of the normal switching and breaking process of the present invention, By greatly reducing the dispersion of the action, the zero voltage connection and zero current breaking of the contact system can be realized; when the control circuit detects a short circuit fault, the control circuit controls the power electronic device D2 and the power electronic device D3 to be turned on, the capacitor C1 and the capacitor C2 discharges the shutter coil very quickly through the power electronic device D2 and the power electronic device D3. The magnetizing plate greatly enhances the magnetic field. Under the action of more powerful electromagnetic repulsion, the metal disk overcomes the opening and breaking position maintaining mechanism. The reaction force rapidly moves in the direction of the closing plate coil, and the moving and static contacts are quickly separated, so that the contact system quickly breaks the short-circuit current, and the metal disk is under the action of the closing and breaking position maintaining mechanism to ensure that the metal disk is on the side of the closing plate coil. Complete short circuit protection task; control when voltage drop occurs in the circuit The circuit can discharge the switching coil C2 according to the requirement, and the contact delay action, and has the function of resisting voltage drop; the invention can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism, and has the control device The faults of normal switching and breaking function and protection of electrical appliances include short-circuit fault protection function, with anti-voltage drop function, which can greatly improve electrical performance indicators, expand electrical working functions, greatly simplify structure, save energy and materials, reduce volume, and greatly increase work. Magnetic flux and other characteristics.

As shown in FIG. 4 and FIG. 5, a low-voltage AC/DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor Cl, capacitor C2, power electronic device D1, power electronic device D2, power electronic device D3, turn-on and break position holding mechanism H, bushing L, moving bridge bracket N and double break point touch The head arc extinguishing system I is characterized in that: one end of the power source U is connected to the input end of the voltage adjusting circuit Y, the other end of the power source U is connected to the other input end of the voltage adjusting circuit Y, and the positive terminal of the voltage adjusting circuit Y is respectively connected with the power electronic device The D3 collector and the capacitor C1 are connected to each other, and the power electronic device D3 emitter is connected to the power electronic device D1 collector, the power electronic device D2 collector, the capacitor C2 anode, and the fifth interface 5 of the control circuit F, respectively. The D1 emitter is connected to the sixth interface 1 of the closing plate coil A-terminal and the control circuit F, and the emitter of the power electronic device D2 is connected to the third interface 3 of the E-terminal of the opening plate coil and the control circuit F, and the voltage adjusting circuit The negative terminal of the Y output terminal is respectively connected to the negative terminal of the capacitor C1, the negative pole of the capacitor C2, the other end of the closing flat coil A, and the other end of the opening flat coil E, and the second interface 2 of the control circuit F and the electric power The sub-device D1 is connected to the control pole, the fourth interface 4 of the control circuit F is connected to the control electrode of the power electronic device D2, the sixth interface 6 of the control circuit F is connected to the control pole of the power electronic device D3, and the flat panel coil A is closed. Opening The plate coils E are respectively mounted on both sides of the metal plate B, and the switch-on and break position maintaining mechanism H are respectively mounted on the metal plate B, the shutter plate coil E and the closing plate coil A, or are mounted on the metal plate B and the electric appliance. Between the moving parts, or between the movable contact bridge bracket N and the stationary parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two bushings L are respectively mounted on the closing flat coil A and the opening On the flat coil E, the magnetizing plate K and the buffering member X, the shaft G is fixed on the metal disk B, the shaft G is connected with the movable contact bridge bracket N, and the dynamic contact bridge bracket N and the double break point contact arc extinguishing system I are moved. The contact bridge II is connected, the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, and the arc extinguishing device 15 is disposed on the outer side of the movable contact 12 and the stationary contact 13, and the shaft G is worn. The closing plate coil A and the bushing L of the opening plate coil E are respectively mounted on the side of the closing plate coil A away from the metal plate B and the side of the opening plate coil E away from the metal plate B. The two buffering members X are respectively mounted on one side of the two magnetizing plates K away from the closing plate coil A and the opening plate coil E.

The shaft is mounted on the metal plate, and the shaft drives the moving contact system. In the non-operating state, the closing and breaking position maintaining mechanism ensures that the metal disk is on the side of the closing plate coil, and the moving contact system is in the breaking state; when the electrical device is required to be connected The power supply is controlled by the control circuit under the control circuit, and the capacitor C1 is quickly charged to the capacitor C1 through the power electronic device D3. Under the control of the control circuit, the capacitor C2 is quickly turned on and off by the power electronic device D1 according to the optimized control time of the design. When the flat coil is discharged, the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism and rapidly moves toward the opening plate coil. After the metal plate approaches the opening plate coil, the low voltage The AC/DC control and protection device relies on the switch-on and break-off position maintaining mechanism to ensure that the metal disk-driven electrical contact bridge and the movable contact system remain in the connected state state, complete the connection task, realize both the fast action and the end of the action impact energy. Very small; when the normal breaking is required, the capacitor C2 is optimized according to the design control time. Through the power electronic device D2, the opening plate coil is quickly discharged, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism to quickly move toward the closing plate coil, and the low voltage The AC/DC control and protection device relies on the connection and disconnection position maintaining mechanism to ensure that the metal disk is driven by the dynamic contact bridge bracket and the movable contact system to maintain the position of the disconnection, complete the circuit breaking task, realize both the fast action and the end of the action. Small; the rapid operation of the normal turn-on and disconnection process of the invention, the motion dispersion is greatly reduced, and the zero-voltage on-off and zero-current disconnection of the contact system can be realized; when the control circuit detects a short-circuit fault in the circuit, the control circuit controls the power electronic The device D2 is electrically connected to the power electronic device D3, and the capacitor C1 and the capacitor C2 are simultaneously connected to the power coil D3 through the power electronic device D2 and the power electronic device D3. Discharge, the magnetizing plate greatly enhances the magnetic field. Under the action of more powerful electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism to quickly move toward the closing plate coil, and the moving and static contacts are quickly separated, so that the contacts The system quickly breaks the short-circuit current, and the metal disk is under the action of the closing and breaking position maintaining mechanism to ensure that the metal disk is on the side of the closing plate coil to complete the short-circuit protection task; when detecting the voltage drop of the circuit, the control circuit can be extended as required The control capacitor C2 discharges to the opening plate coil, the contact delay action, and has the function of resisting voltage drop; the invention can replace the existing conventional electromagnet or motor action mechanism and mechanical action mechanism, and has the control device normally connected and disconnected. The function and protection of electrical faults include short-circuit fault protection, with anti-voltage drop function, which can greatly improve electrical performance indicators, expand electrical work functions, greatly simplify structure, save energy and materials, reduce volume, and greatly increase working magnetic flux.

As shown in FIG. 6 and FIG. 7, a low-voltage AC-DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor Cl, capacitor C2, power electronic device Dl, power electronic device D2, power electronic device D3, power electronic device D4, turn-on and break position maintaining mechanism H, bushing L, dynamic contact bridge bracket N And a double-breakpoint contact arc extinguishing system I, wherein: one end of the power source U is connected to the input terminal of the voltage adjusting circuit Y, and the other end of the power source U is connected to the other input end of the voltage adjusting circuit Y, and the output of the voltage adjusting circuit Y is positive. Connected to the collector of the power electronic device D4, the emitter of the power electronic device D4 is respectively connected to the collector of the power electronic device D3, the positive terminal of the capacitor C1, and the seventh interface 7 of the control circuit F, and the emitter of the power electronic device D3 and the power electronic device D2 respectively The emitter, the opening plate coil E-end, the third interface 3 of the control circuit F are connected, the capacitor C1 cathode and the capacitor C2 anode, the power electronic device D1 collector, the power electronic device D2 collector, the power electronic device D1 The emitter is connected to the first interface 1 of the A-terminal of the closing flat coil and the control circuit F, and the negative terminal of the output terminal of the voltage adjusting circuit Y is respectively connected with the negative pole of the capacitor C2 and the closing flat line The other end of the A, the other end of the opening plate coil E is connected, the second interface 2 of the control circuit F is connected to the control electrode of the power electronic device D1, and the fourth interface 4 of the control circuit F is connected to the control electrode of the power electronic device D2. The sixth interface 6 of the control circuit F is connected to the control electrode of the power electronic device D3, the eighth interface 8 of the control circuit F is connected to the control electrode of the power electronic device D4, and the closing plate coil A and the opening plate coil E are respectively mounted on On both sides of the metal plate B, the switch-on and break position holding mechanism H is respectively mounted on the metal plate B, the shutter plate coil E and the closing plate coil A, or between the metal plate B and the stationary member of the electric appliance, or Installed between the movable contact bridge bracket N and the stationary parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two bushings L are respectively mounted on the closing flat coil A, the opening flat coil E, and the magnetizing Plate K and buffer member X, The shaft G is fixed on the metal plate B, the shaft G is connected with the movable contact bridge bracket N, the movable contact bridge bracket N is connected with the movable contact bridge II of the double break point contact arc extinguishing system I, and the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, the arc extinguishing device 15 is disposed on the outer side of the movable contact 12 and the fixed contact 13, and the shaft G passes through the shaft of the closing flat coil A and the opening flat coil E The sleeve L and the two magnetization plates K are respectively mounted on one side of the closing plate coil A away from the metal plate B and the side of the opening plate coil E away from the metal plate B. The two buffer members X are respectively mounted on the two magnetic plates K Keep away from the side of the closing plate coil A and the opening plate coil E.

The shaft is mounted on the metal plate, and the shaft drives the moving contact system. In the non-operating state, the closing and breaking position maintaining mechanism ensures that the metal disk is on the side of the closing plate coil, and the moving contact system is in the breaking state; when the electrical device is required to be connected The power supply is controlled by the control circuit under the control circuit, and the capacitor C1 and the capacitor C2 are quickly charged by the power electronic device D4. Under the control of the control circuit, the capacitor C2 is quickly turned on and off by the power electronic device D1 according to the optimized control time of the design. When the coil is discharged, the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism and rapidly moves toward the opening plate coil. After the metal plate approaches the opening plate coil, the low voltage is delivered. The DC control and protection device relies on the switch-on and break-off position maintaining mechanism to ensure that the metal disk drives the dynamic contact bridge bracket and the movable contact system to remain in the position state, completes the connection task, realizes both the fast action and the end of the action. Small; when the normal break is required, the capacitor C2 is controlled according to the optimized time of the design. The power electronic device D2 quickly discharges the opening plate coil, and the magnetizing plate greatly enhances the magnetic field. Under the action of the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism to quickly move toward the closing plate coil, and the low voltage The AC/DC control and protection device relies on the connection and disconnection position maintaining mechanism to ensure that the metal disk is driven by the dynamic contact bridge bracket and the movable contact system to maintain the position of the disconnection, complete the circuit breaking task, realize both the fast action and the end of the action. Small; the fast action of the normal switching and breaking process of the invention greatly reduces the dispersibility of the action, and can realize zero voltage switching and zero current breaking of the contact system; when the control circuit detects a short circuit fault of the circuit, the control circuit controls the power electronic The device D2 is electrically connected to the power electronic device D3, and the capacitor C1 and the capacitor C2 are discharged very quickly by the power electronic device D2 and the power electronic device D3 at the same time, and the magnetizing plate greatly enhances the magnetic field, and the electromagnetic repulsion is more powerful. Under the action, the metal plate overcomes the reaction force of the closing and breaking position maintaining mechanism Quickly move in the direction of the closing plate coil, the moving and static contacts are quickly separated, so that the contact system can quickly break the short-circuit current, and the metal disk is under the action of the closing and breaking position maintaining mechanism to ensure that the metal disk is on the side of the closing plate coil, and the short circuit is completed. Protection task; When detecting a voltage drop in the circuit, the control circuit can discharge the capacitor C2 to the opening plate coil according to the required delay, and the contact delay action, with anti-electricity Pressure drop function; the invention can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism, has the function of controlling the normal connection and disconnection function of the electric appliance and protecting the electrical appliance, including the short circuit fault protection function, and has the function of resisting voltage drop, capable of Greatly improve the performance index of electrical appliances, expand the working function of electrical appliances, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

As shown in FIG. 8 and FIG. 9, a low-voltage AC/DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor Cl, capacitor C2, power electronic device D1, power electronic device D2, power electronic device D3, turn-on and break position holding mechanism H, bushing L, moving bridge bracket N and double break point touch The head arc extinguishing system I is characterized in that: one end of the power source U is connected to the input end of the voltage adjusting circuit Y, the other end of the power source U is connected to the other input end of the voltage adjusting circuit Y, and the positive terminal of the voltage adjusting circuit Y is respectively connected with the power electronic device The D3 collector and the capacitor C1 are connected to each other. The emitter of the power electronic device D3 is respectively connected to the emitter of the power electronic device D2, the E-terminal of the shutter coil, and the third interface 3 of the control circuit F. The capacitor C1 cathode and capacitor C2 The positive electrode, the power electronic device D1 collector, the power electronic device D2 collector are connected, the power electronic device D1 emitter is connected to the closing interface coil A-end and the first interface 1 of the control circuit F, the voltage adjustment circuit Y output terminal negative Connected to the negative terminal of the capacitor C2, the other end of the closing plate coil A, and the other end of the opening plate coil E, respectively, and the second connection of the control circuit F The port 2 is connected to the control terminal of the power electronic device D1, the fourth interface 4 of the control circuit F is connected to the control electrode of the power electronic device D2, and the sixth interface 6 of the control circuit F is connected to the control electrode of the power electronic device D3, and is closed. The plate coil A and the opening plate coil E are respectively mounted on both sides of the metal plate B, and the switch-on and break position holding mechanism H are respectively mounted on the metal plate B, the shutter plate coil E and the closing plate coil A, or are mounted on Between the metal plate B and the stationary parts of the electric appliance, or between the movable contact bridge bracket N and the stationary parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two bushings L are respectively installed at the closing The plate coil A, the opening plate coil E, the magnetizing plate K and the buffering member X, the shaft G is fixed on the metal plate B, the shaft G is connected with the movable contact bridge bracket N, the movable contact bracket N and the double break point contact The movable contact bridge II of the arc extinguishing system I is connected, the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, and the arc extinguishing device 15 is disposed on the movable contact 12 and the stationary contact 13 On the outside, the axis G passes through the closing plate coil A And the bushing L of the opening plate coil E, the two magnetizing plates K are respectively mounted on the side of the closing plate coil A away from the metal disk B and the side of the opening plate coil E away from the metal disk B, and the two buffering parts X respectively Installed on one side of the two magnetization plates K away from the closing plate coil A and the opening plate coil E.

Mounting the shaft on the metal plate, the shaft drives the moving contact system, in the non-operating state, the opening and breaking position The holding mechanism ensures that the metal disk is on the side of the closing plate coil, and the moving contact system is in the breaking state; when the electrical device is required to be turned on, the power supply is quickly charged by the voltage adjusting circuit for the capacitor C1 and the capacitor C2, and under the control of the control circuit, the capacitor C2 is pressed. The optimized control time of the design is quickly discharged by the power electronic device D1, and the magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal disk overcomes the reaction force of the connecting and disconnecting position maintaining mechanism to quickly open the slab After the coil is moved, the metal disk approaches the opening plate coil, and the low-voltage AC-DC control and protection device relies on the connection and the disconnection position maintaining mechanism to ensure the position of the metal disk-driven electrical contact bridge and the movable contact system remain connected. Turning on the task, achieving both fast action and ensuring that the impact energy at the end of the action is small; when the normal break is required, the capacitor C2 quickly discharges the shutter plate through the power electronic device D2 according to the optimized control time of the design, and the magnetizing plate greatly enhances the magnetic field. , under the action of powerful electromagnetic repulsion, the metal disk overcomes the connection and disconnection The reaction force of the position maintaining mechanism rapidly moves in the direction of the closing plate coil, and the low-voltage AC-DC control and protection device relies on the opening and closing position maintaining mechanism to ensure the position state of the metal disk driving device and the moving contact system to maintain the breaking position. The circuit breaking task is completed, and the fast action is ensured and the impact energy is small at the end of the operation; the fast action of the normal switching and breaking process of the invention greatly reduces the dispersibility of the action, and the zero voltage connection and the zero current breaking of the contact system can be realized. When the control circuit detects that the circuit has a short-circuit fault, the control circuit controls the power electronic device D2 to be turned on with the power electronic device D3, and the capacitor C1 and the capacitor C2 simultaneously open the plate coil through the power electronic device D2 and the power electronic device D3 very quickly. Discharge, the magnetizing plate greatly enhances the magnetic field. Under the action of more powerful electromagnetic repulsion, the metal disk overcomes the reaction force of the closing and breaking position maintaining mechanism to quickly move toward the closing plate coil, and the moving and static contact is quickly separated, so that the contact The system quickly breaks the short-circuit current, and the metal disk is in the on and off position maintaining mechanism. Under the action, the metal disk is ensured to be on the side of the closing plate coil, and the short-circuit protection task is completed; when the voltage drop of the circuit is detected, the control circuit can discharge the capacitor C2 to the opening plate coil according to the required delay, and the contact delay action. The utility model has the functions of anti-voltage drop function; the invention can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism, has the function of controlling the normal connection and disconnection function of the electric appliance and protecting the electrical appliance, including the short-circuit fault protection function, and has the function of resisting voltage drop. It can greatly improve the performance index of electrical appliances, expand the working function of electrical appliances, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

As shown in FIG. 10 and FIG. 11, a low-voltage AC-DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor C2, power electronic device Dl, power electronic device D2, power electronic device D3, connection The opening and closing position maintaining mechanism 11, the sleeve L, the movable contact bridge bracket N and the double break point contact arc extinguishing system I are characterized in that: one end of the power source U is connected to the input end of the voltage adjusting circuit Y, and the other end of the power source U is connected The other input end of the voltage adjusting circuit Y, the positive terminal of the voltage adjusting circuit Y is connected to the collector of the power electronic device D3, and the emitter of the power electronic device D3 is respectively connected with the fifth interface 5 of the control circuit F, the positive electrode of the capacitor C2, the power electronic The collector of the device D1 and the collector of the power electronic device D2 are connected, the emitter of the power electronic device D1 is connected to the first interface 1 of the closing plate coil A-end and the control circuit F, and the power electronic device D2 emitter and the opening plate coil The third interface 3 of the E-terminal and the control circuit F is connected, and the negative terminal of the output terminal of the voltage adjusting circuit Y is respectively connected with the negative pole of the capacitor C2, the other end of the closing flat coil A, and the other end of the opening flat coil E, and the control circuit F The second interface 2 is connected to the control electrode of the power electronic device D1, the fourth interface 4 of the control circuit F is connected to the control electrode of the power electronic device D2, and the sixth interface 6 of the control circuit F and the control terminal of the power electronic device D3 The closing plate coil A and the opening plate coil E are respectively mounted on both sides of the metal plate B, and the closing and breaking position maintaining mechanism H are respectively mounted on the metal plate B, the opening plate coil E and the closing plate coil A. , or installed between the metal plate B and the fixed parts of the electric appliance, or between the movable contact bridge bracket N and the fixed parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two sleeves L respectively Installed on the closing plate coil A, the opening plate coil E, the magnetizing plate K and the buffering member X, the shaft G is fixed on the metal plate B, the shaft G is connected with the moving contact bridge bracket N, and the moving contact bridge bracket N and the double The movable contact bridge II of the break contact arc extinguishing system I is connected, the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, and the arc extinguishing device 15 is disposed on the movable contact 12 and On the outer side of the stationary contact 13, the shaft G passes through the sleeve L of the closing plate coil A and the opening plate coil E, and the two magnetizing plates K are respectively mounted on the side of the closing plate coil A away from the metal plate B and opened. The flat coil E is away from the side of the metal disc B, and the two buffering members X are respectively mounted on the two magnetizing plates K away from the closing plate A side of the ring opening of E flat coils.

The shaft is mounted on the metal plate, and the shaft drives the moving contact system. In the non-operating state, the on and off position maintaining mechanism ensures that the metal disk is on the side of the closing plate coil, the moving contact system is in the breaking state, and the capacitance of the capacitor C2 is After the voltage is optimized, it is suitable for normal turn-on, break-off and short-circuit fault protection. When the electrical device is required to be connected, the power supply is quickly charged by the power electronic device D3 through the voltage adjustment circuit under the control of the control circuit. Under the control of the circuit, the capacitor C2 quickly discharges the closing plate coil through the power electronic device D1 according to the optimized control time of the design, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the opening and breaking position maintaining mechanism. The reaction force quickly moves in the direction of the opening plate coil. After the metal plate approaches the opening plate coil, the low-voltage AC-DC control and the protection device depend on the connection. The pass-and-break position maintaining mechanism respectively ensures the position state of the metal disk-driven electrical movable bridge bracket and the movable contact system to be kept on, completes the connection task, realizes both fast action and ensures that the impact energy at the end of the action is small; when the normal break is required According to the optimized control time of the design, the capacitor C2 quickly discharges the shutter coil through the power electronic device D2, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the connecting and disconnecting position maintaining mechanism. The direction of the closing plate coil is moved, and the low-voltage AC-DC control and protection device relies on the switch-on and break-off position maintaining mechanism to ensure that the metal disk-driven electrical contact bridge and the movable contact system maintain a disconnected position state, complete the circuit breaking task, and realize both The fast action ensures that the impact energy at the end of the action is small; when the control circuit detects a short circuit fault in the circuit, the capacitor C2 quickly discharges the shutter coil through the power electronic device D2, and the magnetizing plate greatly enhances the magnetic field, under the action of strong electromagnetic repulsion, Metal plate overcomes the connection and disconnection position maintaining mechanism The force rapidly moves in the direction of the closing plate coil, and the low-voltage AC-DC control and protection device relies on the connection and the breaking position maintaining mechanism to ensure that the metal disk-driven electrical moving contact system maintains the positional state of the breaking, and completes the circuit breaking task; With the rapid action of the breaking process, the action dispersion is greatly reduced, and the zero voltage connection and zero current breaking of the contact system can be realized; when the voltage drop of the circuit is detected, the control circuit can delay the control capacitor C2 to the opening as required. The flat coil is discharged, the contact delay action, and has the function of voltage drop resistance; the invention can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism, and has the functions of controlling the normal connection and disconnection function of the electric appliance and protecting the electrical appliance, including Short-circuit fault protection function, with anti-voltage drop function, can greatly improve electrical performance indicators, expand electrical work functions, greatly simplify structure, energy saving, reduce volume, and greatly increase working magnetic flux.

As shown in FIG. 12 and FIG. 13, a low-voltage AC-DC control and protection device includes a closing plate coil A, a metal plate B, a shutter plate coil E, a shaft 6, a magnetization plate K, a buffer member X, and a control circuit. ? , voltage adjustment circuit Υ, capacitor C2, power electronic device Dl, power electronic device D2, turn-on and break position holding mechanism H, bushing L, dynamic contact bridge bracket N and double breakpoint contact arc extinguishing system I, characteristics The one end of the power supply U is connected to the input terminal of the voltage adjusting circuit Y, and the other end of the power supply U is connected to the other input end of the voltage adjusting circuit Y. The positive terminal of the voltage adjusting circuit Y is respectively connected with the positive electrode of the capacitor C2 and the collector of the power electronic device D1. The power electronic device D2 is connected to the collector, the emitter of the power electronic device D1 is connected to the first interface 1 of the closing plate coil A-end and the control circuit F, the power electronic device D2 emitter and the opening plate coil E-end, control The third interface 3 of the circuit F is connected, and the negative terminal of the output terminal of the voltage adjusting circuit Y is respectively connected to the negative pole of the capacitor C2, the other end of the closing flat coil A, and the other end of the opening flat coil E, and the second interface 2 of the control circuit F Connected to the control electrode of the power electronic device D1, the fourth interface 4 of the control circuit F is connected to the control electrode of the power electronic device D2, and the closing plate coil A and the opening plate coil E are respectively mounted on both sides of the metal disk B, The opening and breaking position maintaining mechanism H is respectively mounted on the metal plate B, the opening plate coil E and the closing plate coil A, or between the metal plate B and the stationary member of the electric appliance, or is mounted on the movable contact bracket N and Between the fixed parts of the electric appliance, or between the shaft G and the stationary parts of the electric appliance, the two bushings L are respectively mounted on the closing plate coil A, the opening plate coil E, the magnetizing plate K and the buffering piece X, The shaft G is fixed on the metal plate B, the shaft G is connected with the movable contact bridge bracket N, the movable contact bridge bracket N is connected with the movable contact bridge II of the double break point contact arc extinguishing system I, and the movable contact 12 is mounted on the movable contact bridge II, the static contact 13 is mounted on the static contact bridge 14, the arc extinguishing device 15 is disposed on the outer side of the movable contact 12 and the fixed contact 13, and the shaft G passes through the shaft of the closing flat coil A and the opening flat coil E Set L, two magnetizing plates K are respectively installed on the side of the closing plate coil A away from the metal plate B and the opening flat E coil B side away from the metal plate, two cushioning members are mounted on two X magnetization away from the closing plate K opening flat coils A and E coil plate side.

The shaft is mounted on the metal plate, and the shaft drives the moving contact system. In the non-operating state, the on and off position maintaining mechanism ensures that the metal disk is on the side of the closing plate coil, the moving contact system is in the breaking state, and the capacitance of the capacitor C2 is After the voltage is optimized, it is suitable for normal turn-on, break-off and short-circuit fault protection. When the appliance is required to be connected, the power supply is quickly charged by the voltage adjustment circuit to the capacitor C2. Under the control of the control circuit, the capacitor C2 is optimized according to the design. The time is quickly discharged by the power electronic device D1, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the reaction force of the connecting and breaking position maintaining mechanism to quickly move toward the opening plate coil. After the metal plate approaches the opening plate coil, the low-voltage AC-DC control and protection device relies on the connection and the disconnection position maintaining mechanism to ensure the position state of the metal disk-driven electrical movable bridge bracket and the movable contact system to be kept connected, and the connection task is completed. , achieving both fast action and ensuring that the end of the action has little impact energy; Normally disconnected, capacitor C2 is quickly discharged to the opening plate coil through the power electronic device D2 according to the optimized control time of the design. The magnetizing plate greatly enhances the magnetic field. Under the action of strong electromagnetic repulsion, the metal disk overcomes the reverse of the connecting and breaking position maintaining mechanism. The force rapidly moves in the direction of the closing plate coil, and the low-voltage AC-DC control and protection device relies on the connection and the disconnection position maintaining mechanism to ensure that the metal disk-driven electrical contact bridge and the movable contact system maintain a disconnected position state, and complete the circuit breaking task. When the control circuit detects that the circuit has a short-circuit fault, the capacitor C2 quickly discharges the shutter coil through the power electronic device D2, and the magnetizing plate greatly enhances the magnetic field. Under the strong electromagnetic repulsion, the metal disk overcomes the opening and breaking position maintaining mechanism. The reaction force quickly moves toward the closing plate coil, low voltage AC and DC control The system and the protection device rely on the connection and the disconnection position maintaining mechanism to ensure the position state of the metal disk to drive the movable contact system to maintain the breaking, complete the circuit breaking task, realize the fast action and ensure that the impact energy is small at the end of the operation; With the rapid action of the breaking process, the action dispersion is greatly reduced, and the zero voltage connection and zero current breaking of the contact system can be realized; when the voltage drop of the circuit is detected, the control circuit can delay the control capacitor C2 to the opening as required. The flat coil is discharged, the contact delay action, and has the function of voltage drop resistance; the invention can replace the existing traditional electromagnet or motor action mechanism and mechanical action mechanism, and has the functions of controlling the normal connection and disconnection function of the electric appliance and protecting the electrical appliance, including The short-circuit fault protection function has the function of voltage drop resistance, which can greatly improve the electrical performance index, expand the electrical work function, greatly simplify the structure, save energy and materials, reduce the volume, and greatly increase the working magnetic flux.

As shown in FIG. 14 and FIG. 15, a connection and disconnection position maintaining mechanism of a low-voltage AC-DC control and protection device includes a magnetic material HI and a magnetic material J, wherein: the magnetic material HI is mounted on the metal disk B, Two magnetic materials J are respectively mounted on the closing plate coil A and the opening plate coil E.

When the electric appliance is in the breaking state, the magnetic material HI is sucked by the ferromagnetic material J mounted on the closing flat coil A, so as to ensure that the metal disc drives the movable moving contact system to maintain the disconnected position state; when the electric appliance is in the on state, The magnetic material HI is attracted to the magnetic material J mounted on the opening plate coil A, and the metal disk is driven to maintain the position state of the movable contact system.

As shown in FIG. 16 and FIG. 17, a connection and disconnection position maintaining mechanism of the low-voltage AC-DC control and protection appliance includes a spring H2 and a magnetic material H3, wherein the spring H2 is mounted on the metal plate B and the opening plate. Between the coil E and the side parts of the electric device, two magnetic materials H3 are respectively mounted on the metal plate B and the opening plate coil E.

When the electric appliance is in the breaking state, the spring H2 is in an extended state, ensuring that the metal disc drives the movable contact system of the electric appliance to maintain the position of the disconnected state; when the electric appliance is in the on state, the spring H2 is compressed, installed on the metal disc and opened The magnetic material H3 on the flat coil is sucked to ensure that the metal disc drives the movable contact system of the electric appliance to maintain the position of being turned on.

As shown in FIG. 18 and FIG. 19, a low-voltage AC-DC control and protection device for connecting and disconnecting position maintaining mechanism includes a spring H2 and a magnetic material H3, wherein: the spring H2 is mounted on the movable contact bracket N and the electric appliance. Between the stationary parts, two magnetic materials H3 are respectively mounted on the metal disk B and the opening plate coil E.

When the electric appliance is in the breaking state, the spring H2 is extended to ensure that the metal disc drives the movable contact bracket of the electric appliance. The moving contact system maintains the position state of the breaking; when the electric appliance is in the ON state, the spring H2 is in a compressed state, and the magnetic material H3 mounted on the metal plate and the opening plate coil is sucked to ensure that the metal disk drives the moving contact of the electric appliance. The position in which the bracket and the moving contact system remain in contact.

As shown in FIG. 20 and FIG. 21, a low-voltage AC-DC control and protection device for connecting and breaking the position maintaining mechanism, including a spring H2 and a magnetic material H3, is characterized in that: the spring H2 is mounted with the metal plate B and the closing plate coil A - between the stationary parts of the side electrical components, two magnetic materials H3 are respectively mounted on the metal plate B and the closing plate coil A.

When the electric appliance is in the breaking state, the spring H2 is compressed, and the magnetic material H3 mounted on the metal disc and the closing flat coil is sucked to ensure that the metal disc drives the movable contact system of the electric appliance to maintain the disconnected position state; when the electric appliance is turned on In the state, the spring H2 is in an extended state, and the state in which the metal disk drives the movable contact system of the electric appliance to remain in the state is ensured.

As shown in Fig. 22, a low-voltage AC-DC control and protection appliance switching and breaking position maintaining mechanism, including a bistable butterfly spring H2, is characterized in that a bistable butterfly spring H2 is mounted on the shaft G.

When the appliance is in the on or off state, the bistable butterfly spring H2 is in a different state, ensuring that the metal disk drive electrical contact system remains in the on or off position.

As shown in Fig. 23, a low-voltage AC-DC control and protection appliance switching and breaking position maintaining mechanism includes a bistable leaf spring H2, characterized in that a bistable leaf spring H2 is mounted on the shaft G.

When the appliance is in the on or off state, the bistable leaf spring H2 is in a different state, and the state in which the metal disk is driven to move the movable contact system to be kept on or off is ensured.

It is worth mentioning that the capacitor Cl and the capacitor C2 of the present invention may be a single capacitor or a capacitor bank.

It is worth mentioning that the power electronic device D1, the power electronic device D2, the power electronic device D3, and the power electronic device D4 of the present invention can adopt a thyristor or an IGBT insulated gate bipolar transistor or a crystal triode or a MOSFET field effect transistor.

The above is a preferred embodiment of the present invention, and any changes made by the technical solutions of the present invention do not exceed the scope of the technical solutions of the present invention.

Claims

claims

1. A low-voltage AC and DC control and protection electrical appliance, including a closing flat coil (A), a metal plate (B), an opening flat coil (E), a shaft (G), a magnetizing plate (K), and a buffer ( Χ), control circuit (F), voltage adjustment circuit (Y), capacitor Cl, capacitor C2, power electronic device D1, power electronic device D2, power electronic device D3, power electronic device D4, on and off position maintaining mechanism ( H), bushing (L), moving contact bridge bracket (N) and double break point contact arc extinguishing system (I);

It is characterized in that: one end of the power supply (U) is connected to the input end of the voltage adjustment circuit (Y), the other end of the power supply (U) is connected to the other input end of the voltage adjustment circuit (Y), and the positive pole of the output end of the voltage adjustment circuit (Y) is connected to The collector of the power electronic device D4 and the emitter of the power electronic device D4 are respectively connected to the collector of the power electronic device D3, the positive electrode of the capacitor C1 and the seventh interface (7) of the control circuit (F). The emitter of the power electronic device D3 is respectively connected to the power electronic device D3. The collector of the electronic device D1, the collector of the power electronic device D2, the positive electrode of the capacitor C2, and the fifth interface (5) of the control circuit (F) are connected, and the emitter of the power electronic device D1 is connected to one end of the closing plate coil (Α) and the control The first interface (1) of the circuit (F), the emitter of the power electronic device D2 is connected to the terminal of the open flat plate coil (E) and the third interface (3) of the control circuit (F), the voltage adjustment circuit (Y) output The negative pole of the terminal is connected to the negative pole of capacitor C1, the negative pole of capacitor C2, the other end of the closing flat coil (Α), and the opening flat coil.

(E) The other end is connected, the second interface (2) of the control circuit (F) is connected with the control pole of the power electronic device (D1), and the fourth interface (4) of the control circuit (F) is controlled with the power electronic device D2 poles are connected, the sixth interface (6) of the control circuit (F) is connected to the D3 control pole of the power electronic device, the eighth interface (8) of the control circuit (F) is connected to the D4 control pole of the power electronic device, and the switching plate is closed Coil (Α) and opening plate coil

(Ε) are installed on both sides of the metal plate (Β) respectively; the on and off position holding mechanisms (Η) are installed on the metal plate (Β), the opening plate coil (Ε) and the closing plate coil (Α) respectively. , or mounted on a metal plate

(B) and the fixed parts of the electrical appliance, or installed between the movable contact bridge bracket (N) and the fixed parts of the electrical appliance, or installed between the shaft (G) and the fixed parts of the electrical appliance; two bushings (L ) are respectively installed on the closing plate coil (Α), the opening plate coil (E), the magnetizing plate (Κ) and the buffer (X). The axis (G) is fixed on the metal plate (Β), and the axis (G) ) is connected to the movable contact bridge bracket (Ν), the movable contact bridge bracket (Ν) is connected to the movable contact bridge (II) of the double break point contact arc extinguishing system (I), and the movable contact (12) is installed on the movable contact bridge (II), the static contact (13) is installed on the static contact bridge (14), the arc extinguishing device (15) is placed outside the movable contact (12) and the static contact (13), and the shaft (G) passes through Bushings for overclosing flat coil (Α) and opening flat coil (Ε)

(L), two magnetizing plates (Κ) are respectively installed on the side of the closing plate coil (Α) away from the metal plate (Β) On the side of the opening plate coil (E) away from the metal plate (B), two buffer parts (X) are installed on two magnetizing plates (K) respectively, away from the closing plate coil (A) and the opening plate coil (E ) side.

2. The low-voltage AC and DC control and protection appliance according to claim 1, characterized in that: the power electronic device D4 is omitted, and the eighth interface (8) of the control circuit (F) is deleted and connected to the control pole of the power electronic device D4. Delete the connecting line connecting the D4 emitter of the power electronic device and the seventh interface (7) of the control circuit (F).

3. The low-voltage AC and DC control and protection appliance according to claim 1, characterized in that: the connecting and breaking position maintaining mechanism (H) is a contactor-type reaction force spring, a permanent magnet contactor-type magnetic Material, reaction spring and magnetic material combination or bistable butterfly spring or bistable leaf spring.

4. The low-voltage AC and DC control and protection electrical appliance according to claim 1, characterized in that: the double-break point contact arc extinguishing system (I) of the low-voltage AC and DC control and protection electrical appliance is a three-pole double-break point common Six pairs of contacts, two pairs of contacts with double breakpoints, or two pairs of contacts with one pole and double breakpoints.

5. The low-voltage AC and DC control and protection appliance according to claim 1, characterized in that: when the power supply (U) is DC, the voltage adjustment circuit (Y) is omitted.

6. A low-voltage AC and DC control and protection electrical appliance, including a closing flat coil (Α), a metal plate (Β), an opening flat coil (E), a shaft (G), a magnetizing plate (K), and a buffer ( Χ), control circuit (F), voltage adjustment circuit (Y), capacitor Cl, capacitor C2, power electronic device D1, power electronic device D2, power electronic device D3, power electronic device D4, on and off position maintaining mechanism ( H), bushing (L), moving contact bridge bracket (N) and double break point contact arc extinguishing system (I);

It is characterized in that: one end of the power supply (U) is connected to the input end of the voltage adjustment circuit (Y), the other end of the power supply (U) is connected to the other input end of the voltage adjustment circuit (Y), and the positive pole of the output end of the voltage adjustment circuit (Y) is connected to The collector of the power electronic device D4 and the emitter of the power electronic device D4 are respectively connected to the collector of the power electronic device D3, the positive electrode of the capacitor C1 and the seventh interface (7) of the control circuit (F). The emitter of the power electronic device D3 is respectively connected to the power electronic device D3. The emitter of the electronic device D2, one end of the opening plate coil (E), and the third interface (3) of the control circuit (F) are connected, the negative electrode of the capacitor C1 is connected to the positive electrode of the capacitor C2, the collector of the power electronic device D1, and the power electronic device D2 The collector is connected, the emitter of the power electronic device D1 is connected to the first interface (1) of the closing plate coil (Α) and the control circuit (F), and the negative pole of the output terminal of the voltage adjustment circuit (Y) is connected to the negative pole of the capacitor C2 respectively. , the other end of the closing flat coil (A) and the other end of the opening flat coil (E) are connected, the second interface (2) of the control circuit (F) is connected to the control pole of the power electronic device D1, the control circuit (F) The fourth interface (4) The sixth interface (6) of the control circuit (F) is connected to the control pole of the power electronic device D2, and the eighth interface (8) of the control circuit (F) is connected to the control pole of the power electronic device D4. poles are connected, the closing flat coil (A) and the opening flat coil (E) are installed on both sides of the metal plate (B) respectively; the making and breaking position holding mechanisms (H) are installed on the metal plate (B), On the opening plate coil (E) and the closing plate coil (A), or installed between the metal plate (B) and the fixed parts of the appliance, or between the moving contact bridge bracket (N) and the fixed parts of the appliance , or installed between the shaft (G) and the fixed parts of the electrical appliance; the two bushings (L) are respectively installed on the closing plate coil (A), the opening plate coil (E), the magnetizing plate (K) and the buffer On the piece (X), the shaft (G) is fixed on the metal plate (B), the shaft (G) is connected to the movable contact bridge bracket (N), and the movable contact bridge bracket (N) is connected to the double breakpoint contact arc extinguishing system ( The movable contact bridge (II) of I) is connected, the movable contact (12) is installed on the movable contact bridge (II), the static contact (13) is installed on the static contact bridge (14), and the arc extinguishing device (15) is installed On the outside of the movable contact (12) and the static contact (13), the shaft (G) passes through the sleeve (L) of the closing plate coil (A) and the opening plate coil (E), and the two magnetizing plates (Κ) are respectively installed on the side of the closing plate coil (Α) away from the metal plate (Β) and the side of the opening plate coil (E) far away from the metal plate (Β). The two buffer parts (X) are installed on the two pieces respectively. The side of the magnetizing plate (Κ) away from the closing plate coil (Α) and the opening plate coil (Ε).

7. The low-voltage AC and DC control and protection appliance according to claim 6, characterized in that: the power electronic device D4 is omitted, and the eighth interface (8) of the control circuit (F) is deleted and connected to the control pole of the power electronic device D4. Delete the connecting line connecting the D4 emitter of the power electronic device and the seventh interface (7) of the control circuit (F).

8. The low-voltage AC and DC control and protection appliance according to claim 6, characterized in that: the connecting and breaking position maintaining mechanism (H) is a contactor-type reaction spring, a permanent magnet contactor-type magnetic Material, reaction spring and magnetic material combination or bistable butterfly spring or bistable leaf spring.

9. The low-voltage AC and DC control and protection electrical appliance according to claim 6, characterized in that: the double-break point contact arc extinguishing system (I) of the low-voltage AC and DC control and protection electrical appliance is a three-pole double-break point common Six pairs of contacts, two pairs of contacts with double breakpoints, or two pairs of contacts with one pole and double breakpoints.

10. The low-voltage AC and DC control and protection appliance according to claim 6, characterized in that: when the power supply (U) is DC, the voltage adjustment circuit (Y) is omitted.

11. A low-voltage AC and DC control and protection electrical appliance, including a closing flat coil (Α), a metal plate (Β), an opening flat coil (E), a shaft (G), a magnetizing plate (K), and a buffer ( Χ), control circuit (F), voltage regulation The whole circuit (Y), capacitor C2, power electronic device D1, power electronic device D2, power electronic device D3, making and breaking position maintaining mechanism (H), shaft sleeve (L), moving contact bridge bracket (N) and double Breakpoint contact arc extinguishing system (I);

It is characterized in that: one end of the power supply (U) is connected to the input end of the voltage adjustment circuit (Y), the other end of the power supply (U) is connected to the other input end of the voltage adjustment circuit (Y), and the positive pole of the output end of the voltage adjustment circuit (Y) is connected to The collector of power electronic device D3 and the emitter of power electronic device D3 are respectively connected to the collector of power electronic device D1, the collector of power electronic device D2, the positive electrode of capacitor C2, and the fifth interface (5) of the control circuit (F). The power electronic device The emitter of the device D1 is connected to the first interface (1) of the closing flat coil (A) and the control circuit (F), and the emitter of the power electronic device D2 is connected to the opening flat coil (E) and the control circuit (F). The third interface (3) of F), the negative pole of the output terminal of the voltage adjustment circuit (Y) is connected to the negative pole of the capacitor C2, the other end of the closing flat coil (Α), and the other end of the opening flat coil (Ε) respectively, and the control circuit ( The second interface (2) of F) is connected to the control pole of the power electronic device D1, the fourth interface (4) of the control circuit (F) is connected to the control pole of the power electronic device D2, and the sixth interface of the control circuit (F) (6) Connected to the D3 control pole of the power electronic device, the closing flat coil (A) and the opening flat coil (E) are installed on both sides of the metal plate (B) respectively; the connecting and breaking position maintaining mechanism (H) Installed on the metal plate (B), opening plate coil (E) and closing plate coil (A) respectively, or installed between the metal plate (B) and the fixed parts of the electrical appliance, or installed on the moving contact bridge bracket ( between N) and the fixed parts of the electrical appliance, or between the shaft (G) and the fixed parts of the electrical appliance; the two bushings (L) are respectively installed on the closing plate coil (Α) and the opening plate coil (E) , the magnetizing plate (Κ) and the buffer (X), the shaft (G) is fixed on the metal plate (Β), the shaft (G) is connected to the movable contact bridge bracket (Ν), the movable contact bridge bracket (Ν) is connected to The movable contact bridge (II) of the double-break point contact arc extinguishing system (I) is connected, the movable contact (12) is installed on the movable contact bridge (II), and the static contact (13) is installed on the static contact bridge (14) On the top, the arc extinguishing device (15) is placed outside the movable contact (12) and the static contact (13), and the shaft (G) passes through the sleeves of the closing plate coil (Α) and the opening plate coil (Ε) (L), two magnetizing plates (Κ) are respectively installed on the side of the closing plate coil (A) away from the metal plate (B) and the opening plate coil (E) on the side far away from the metal plate (B), two buffers The parts (X) are respectively installed on the side of the two magnetizing plates (Κ) away from the closing flat coil (Α) and the opening flat coil (Ε).

12. The low-voltage AC and DC control and protection appliance according to claim 11, characterized in that: the power electronic device D3 is omitted, and the sixth interface (6) of the control circuit (F) is deleted and connected to the control pole of the power electronic device D3. Delete the connection line between the D4 emitter of the power electronic device and the fifth interface (5) of the control circuit (F) Connected cables.

13. The low-voltage AC and DC control and protection appliance according to claim 11, characterized in that: the on and off position holding mechanism (H) is a contactor-type reaction force spring, a permanent magnet contactor-type magnetic Material, reaction spring and magnetic material combination or bistable butterfly spring or bistable leaf spring.

14. The low-voltage AC/DC control and protection appliance according to claim 11, characterized in that: the double-break point contact arc extinguishing system (I) of the low-voltage AC/DC control and protection appliance is a three-pole double-break point common Six pairs of contacts, two pairs of contacts with double breakpoints, or two pairs of contacts with one pole and double breakpoints.

15. The low-voltage AC and DC control and protection appliance according to claim 11, characterized in that: when the power supply (U) is DC, the voltage adjustment circuit (Y) is omitted.