CN201196928Y - Transverse magnetic field permanent magnet linear electric motor operation mechanism of high-voltage circuit-breaker - Google Patents

Abstract

A high-voltage circuit breaker transverse magnetic field permanent magnet linear motor operating mechanism, which belongs to the technical field of power transmission and transformation equipment, is composed of a transverse magnetic field permanent magnet linear motor and a transmission mechanism. The motor shaft of the transverse magnetic field permanent magnet linear motor is connected, and the other end is connected with the moving contact of the arc extinguishing chamber. The primary iron core of the transverse magnetic field permanent magnet linear motor is composed of two opposite concave blocks. Each concave block is made of silicon steel sheets laminated into several groove-shaped structures. Slots are slotted on the upper and lower surfaces of the level core, and armature windings are placed in the slots. Permanent magnets are embedded at the junction of the two concave blocks. The permanent magnets form the magnetic poles of the motor. The armature windings are laid in a single layer in the slot Arranged in the form of concentrated full-pitch windings. The utility model has the advantages that it greatly reduces the transmission mechanism part of the traditional operating mechanism, and uses the linear motion of the motor to directly drive the contact opening/closing of the high-voltage circuit breaker.

Description

A high-voltage circuit breaker transverse magnetic field permanent magnet linear motor operating mechanism

technical field

The utility model belongs to the technical field of power transmission and transformation equipment, in particular to an operating mechanism for a high-voltage circuit breaker with a transverse magnetic field permanent magnet linear motor, which is suitable for intelligent operation of the circuit breaker.

Background technique

For high-voltage circuit breakers, it is required that the operating mechanism can not only obtain a higher opening and closing speed, but also quickly realize automatic reclosing operation. The operating mechanism plays an important role in the circuit breaker. It not only ensures the long-term operation reliability of the circuit breaker, but also meets the requirements of the arc extinguishing characteristics for the operating mechanism. The time and speed required for the opening and closing of the circuit breaker must meet its opening and closing requirements, so as to quickly remove the fault without expanding the fault, maintain the stability of the power system, and reduce damage to equipment and lines. To this end, the circuit breaker is required to have good operating performance to meet the above requirements. The existing operating mechanisms mainly include hydraulic operating mechanisms, spring operating mechanisms or pneumatic technology, etc. Most of them are composed of a complete set of mechanical devices, with many parts, complex transmission mechanisms, high manufacturing process requirements, and uncontrollable motion processes.

Utility model content

In order to solve the shortcomings of the existing circuit breaker operating mechanism, the utility model provides a transverse magnetic field permanent magnet linear motor operating mechanism for high-voltage circuit breakers, which greatly reduces the transmission mechanism part of the traditional operating mechanism, and utilizes the transverse magnetic field The linear motion of the permanent magnet linear motor directly drives the opening/closing of the moving contact of the high voltage circuit breaker.

The structure of the utility model is: composed of a transverse magnetic field permanent magnet linear motor and a transmission mechanism, the motor shaft of the transverse magnetic field permanent magnet linear motor and the moving contact of the high voltage circuit breaker are connected through the transmission mechanism, and are located under the arc extinguishing chamber of the high voltage circuit breaker Equipped with a transmission mechanism, one end of the transmission mechanism is connected with the motor shaft of the transverse magnetic field permanent magnet linear motor, and the other end is connected with the moving contact of the arc extinguishing chamber of the high voltage circuit breaker. Transverse magnetic field permanent magnet linear motor installs permanent magnets on the primary iron core, the main magnetic field is established by the permanent magnets, and direct current is passed into the armature winding of the transverse magnetic field permanent magnet linear motor, so that the current-carrying conductor is driven by force in the magnetic field The secondary iron core moves, and the secondary iron core drives the moving contact of the circuit breaker to move through the linkage mechanism.

The transverse magnetic field permanent magnet linear motor includes a primary core, a permanent magnet, a secondary core, an armature winding, and a motor shaft, which are distributed sequentially from the inside to the outside along the radial direction: the motor shaft, the secondary core, the permanent magnet, the armature winding, and the primary shaft. Iron core, the primary iron core is composed of two opposite concave blocks, the two concave blocks are combined together to form a mouth shape, each concave block is formed by laminating silicon steel sheets into several groove-shaped structures, the two concave blocks of the primary core There is a secondary iron core in the middle of the shaped block, slots are made on the upper and lower surfaces of the secondary iron core, and armature windings are placed in the slots, single-phase current is passed through the armature windings, and the connection between the two concave blocks is embedded Permanent magnets are placed, and the permanent magnets constitute the magnetic poles of the transverse magnetic field permanent magnet linear motor, and the armature windings are arranged in the slots in the manner of single-layer concentrated full-pitch windings.

The utility model has the advantages: the high-voltage circuit breaker transverse magnetic field permanent magnet linear motor operating mechanism overcomes the shortcomings of the traditional operating mechanism such as large volume, complex transmission mechanism, long response time and uncontrollable movement process, and breaks through the traditional mechanism The principle of movement uses the electromagnetic thrust generated by the motor itself to drive the opening/closing of the contacts of the circuit breaker. It has the following advantages:

(1) The circuit structure and the magnetic circuit structure are not in the same plane, and there is no mutual restriction relationship;

(2) There is no coupling between each phase, which is convenient for independent analysis and control;

(3) Many parameters are independent of each other, and the freedom of parameter selection is large;

(4) Concentrated windings are used for each phase, the ends of the windings are small, and the structure of the motor is compact.

In addition to reliable and stable operation, the transverse magnetic field permanent magnet motor adopted by the utility model can also provide relatively large force density and power density. Due to the reduction of complex transmission mechanisms, the mass of the mechanism is small, the moment of inertia is small, and the kinetic energy is greatly reduced. The energy loss is reduced, and the efficiency is improved; at the same time, the accuracy and reliability of the whole device are improved, and the device has the characteristics of high response and high precision, and the motion process is controllable.

Description of drawings

Fig. 1 is a structural principle diagram of the operating mechanism of the transverse magnetic field permanent magnet linear motor of the medium and high voltage circuit breaker of the utility model,

Fig. 2 is a structural schematic diagram of the transverse magnetic field permanent magnet linear motor in the utility model.

In the figure: 1 static contact, 2 arc extinguishing chamber, 3 moving contact, 4 transmission mechanism, 5 transverse magnetic field permanent magnet linear motor, 6 primary iron core, 7 secondary iron core, 8 permanent magnet, 9 motor shaft, 10 armature winding.

Detailed ways

For the 40.5kV indoor vacuum circuit breaker, according to the requirements of the interrupter for the operating mechanism, a transverse magnetic field permanent magnet linear motor operating mechanism is designed, and the electromagnetic thrust provided by the transverse magnetic field permanent magnet linear motor operating mechanism is required to reach 3000 ~6000N, the moving speed can reach more than 4~6m/s, and the running time should be less than 20ms.

Below in conjunction with accompanying drawing, the utility model is further described:

The structure of the operating mechanism of the transverse magnetic field permanent magnet linear motor of the utility model high-voltage circuit breaker is shown in the accompanying drawing 1, and a transmission mechanism 4 is installed below the arc extinguishing chamber 2, and the motor spindle of the transmission mechanism 4 and the transverse magnetic field permanent magnet linear motor 9 are connected, and the motor spindle 9 drives the transmission mechanism 4 to move, thereby driving the moving contact 3 to move, so as to realize the opening/closing of the circuit breaker.

The structure of the transverse magnetic field permanent magnet linear motor is shown in Figure 2, including the primary iron core 6, the secondary iron core 7, the permanent magnet 8, the motor shaft 9, and the armature winding 10 of the transverse magnetic field permanent magnet linear motor. The distribution in turn is: motor spindle 9, secondary core 7, armature winding 10, permanent magnet 8, primary core 6, primary core 6 is composed of two opposite concave blocks, and the two concave blocks are combined to form a mouth shape. Each concave block is made of silicon steel sheets laminated into several groove-shaped structures. A secondary iron core 7 is arranged between the two concave blocks of the primary core, and grooves are slotted on the upper and lower surfaces of the secondary iron core 7, and The armature winding 10 is placed in the slot, and a single-phase current is passed into the armature winding 10. A permanent magnet 8 is embedded in the joint of the two concave blocks. The permanent magnet 8 constitutes the magnetic pole of the transverse magnetic field permanent magnet linear motor, and the armature The windings are arranged in the slots in the manner of single-layer concentrated full-pitch windings. A current is passed into the armature winding 10 , and the current is subjected to the action of the Ampere force in the magnetic field generated by the permanent magnet to generate electromagnetic thrust to promote the horizontal movement of the secondary core 7 .

Claims (2)

1, a kind of high-voltage circuit-breaker lateral direction magnetic field permanent magnetism straight line motor operating mechanism, form by lateral direction magnetic field permanent magnetism straight line motor and transmission mechanism, it is characterized in that below the primary cut-out arc control device, transmission mechanism being housed, the electric machine main shaft of transmission mechanism one end and lateral direction magnetic field permanent magnetism straight line motor links to each other, and the other end links to each other with the moving contact of primary cut-out arc control device.

2, a kind of high-voltage circuit-breaker lateral direction magnetic field permanent magnetism straight line motor operating mechanism according to claim 1, it is characterized in that described lateral direction magnetic field permanent magnetism straight line motor comprises elementary iron core, permanent magnet, secondary iron core, armature winding, electric machine main shaft, radially be distributed as successively from inside to outside: electric machine main shaft, secondary iron core, permanent magnet, armature winding, elementary iron core, elementary iron core is made of two spill pieces, two matrix pieces are incorporated into and are the shape of the mouth as one speaks together, each spill piece is to form several flute profile structures by silicon steel plate stacking, be provided with secondary iron core in the middle of two spill pieces of elementary iron core, on the upper and lower surfaces of secondary iron core, slot, and in groove, place armature winding, feed monophase current in the armature winding, two spill pieces connect part and have embedded permanent magnet, permanent magnet constitutes the magnetic pole of lateral direction magnetic field permanent magnetism straight line motor, and armature winding is arranged apart from the mode of winding by concentrated the putting in order of individual layer in groove.

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