阅读说明：本技术 一种移磁调压软起动及定位装置 (Moving magnet voltage regulating soft starting and positioning device ) 是由 谢波 刘洪安 孙翀 王肖肖 谢耀平 贺玉平 汪耀 于 2021-07-13 设计创作，主要内容包括：一种移磁调压软起动及定位装置,包括移磁调压装置、控制系统、活动控制系统和调压定位装置,所述移磁调压装置为多个空芯线圈组成的一组多相线圈,所述空芯线圈中均设置有轨道,与空芯线圈位置相对应的铁芯柱置放在每个空芯线圈中的轨道上,铁芯柱沿轨道在空芯线圈内移动；所述调压定位装置包括行程开关托盘、限位顶杆、限位开关；所述限位顶杆固定在铁芯柱上,随着铁芯柱的移动一起变换位置；所述限位开关与极位开关安装于行程开关托盘上；所述控制系统和活动控制系统、调压定位装置、移磁调压装置通信连接。本发明主要用于高压电动机的软起动,软停机；通过调压定位装置实现线圈阻值自适应调整,结构完整,操作简单。(A magnetism-moving and voltage-regulating soft starting and positioning device comprises a magnetism-moving and voltage-regulating device, a control system, an activity control system and a voltage-regulating positioning device, wherein the magnetism-moving and voltage-regulating device is a group of multi-phase coils consisting of a plurality of hollow coils, each hollow coil is provided with a track, an iron core column corresponding to the position of the hollow coil is placed on the track in each hollow coil, and the iron core column moves in the hollow coil along the track; the pressure regulating positioning device comprises a travel switch tray, a limiting ejector rod and a limiting switch; the limiting ejector rod is fixed on the iron core column and changes positions along with the movement of the iron core column; the limit switch and the pole position switch are arranged on the travel switch tray; the control system is in communication connection with the activity control system, the pressure regulating and positioning device and the magnetism-shifting and pressure regulating device. The invention is mainly used for soft start and soft stop of the high-voltage motor; the self-adaptive adjustment of the coil resistance value is realized through the pressure regulating positioning device, the structure is complete, and the operation is simple.)

1. The utility model provides a move magnetism pressure regulating soft start and positioner, includes move magnetism pressure regulating device, control system, activity control system and pressure regulating positioner, its characterized in that: the magnetic-moving voltage-regulating device is a group of multi-phase coils consisting of a plurality of hollow coils, tracks are arranged in the hollow coils, iron core columns corresponding to the positions of the hollow coils are placed on the tracks in the hollow coils, and the iron core columns move in the hollow coils along the tracks; the pressure regulating positioning device comprises a travel switch tray, a limiting ejector rod and a limiting switch; the limiting ejector rod is fixed on the iron core column and changes positions along with the movement of the iron core column; the limit switch and the pole position switch are arranged on the travel switch tray; the control system is in communication connection with the activity control system, the pressure regulating and positioning device and the magnetism-shifting and pressure regulating device.

2. The moving magnet voltage regulating soft starting and positioning device as claimed in claim 1, wherein: the limit switch includes last limit switch and just limit switch, last limit switch all is equipped with two sets of supports with just limit switch, the support top is equipped with the swing arm that turns to, connects the round pin axle that turns to swing arm and support.

3. The moving magnet voltage regulating soft starting and positioning device as claimed in claim 2, characterized in that: the steering swing arms are parallel to each other, the bottom of the support is fixed on the horizontal plane of the travel switch tray, and the plane of the steering swing arms, which exceeds the support, is in a suspended state.

4. The moving magnet voltage regulating soft starting and positioning device as claimed in claim 3, wherein: spacing ejector pin is used for touching limit switch's face to be the ladder face of two-stage, the motion trail of ladder face is parallel and stagger each other, and the two-stage ladder sets up with first limit switch and second limit switch respectively relatively, and the distance of two ladder faces equals distance difference around first limit switch and the second limit switch.

5. The moving magnet voltage regulating soft starting and positioning device according to any one of claim 4, characterized in that: and the free end of the steering swing arm is provided with a touch part matched with the limiting ejector rod.

6. The moving magnet voltage regulating soft starting and positioning device as claimed in claim 5, wherein: the touch piece is an O-shaped gasket.

7. The device for soft starting and positioning of moving magnet and regulating voltage according to any one of claims 1 to 6, characterized in that: the voltage regulation positioner still includes utmost point position switch, utmost point position switch includes terminal utmost point position switch and first end utmost point position switch, iron core post initial position is located to first end utmost point position switch, and iron core post end position is located to terminal utmost point position switch.

8. The moving magnet voltage regulating soft starting and positioning device as claimed in claim 7, wherein: the movable control system comprises a screw, the screw is fixed at the tail of the iron core column, a screw rod connected with the screw is arranged on the support through bearing seats at two ends, the transmission mechanism is connected with a dragging motor fixed on the support, the dragging motor drives the transmission mechanism, and the transmission mechanism drives the iron core column to move in the hollow coil.

Technical Field

The invention relates to a moving magnet voltage regulation soft start, in particular to a positioning device for the soft start, and belongs to the technical field of motor dragging control.

Background

At present, a reactor is generally adopted as starting equipment of a high-power high-voltage motor, although the structure is simple, the reactance value is fixed and unchanged in the starting process, the starting characteristic is hard, secondary impact is easy to generate, and the phenomenon of unsuccessful starting can be caused when the reactor is not properly selected.

The domestic 6-10kV high-voltage motor soft start product technology is still in gap with the international advanced level, and at present, the domestic main high-voltage soft start equipment and the defects thereof mainly appear in the following aspects: high-voltage frequency conversion soft start: the price is particularly expensive, the content of higher harmonics is large, the damage to a motor and a power grid is large, the high-voltage frequency conversion technology is still in a development stage, the reliability is poor, and domestic high-power motor starting is monopolized by imported frequency conversion; high-pressure liquid resistance soft start: the use is limited by geographical position, environmental temperature and the like, the repeatability is poor, the maintenance is difficult, and the safety performance is poor; soft start of a piezoresistor: the harmonic pollution is large, the voltage-sharing and current-sharing technology is complex, the cost is high, the price is high, the risk is large, and as a large number of thyristors are connected in series and in parallel, the fault points are many, the maintenance is complex, the overhaul is frequent, and the capacity of a motor is limited.

The devices have the defects of small adjusting range, complex manufacturing process, unobvious soft effect, incapability of realizing full-automatic voltage and speed regulation control, unstable output voltage, irregular protection function and the like.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the device overcomes the defects of the prior art, utilizes the magnetic field intensity correlation technology of the self-inductance coil, and provides a moving magnet voltage regulating soft starting and positioning device which can ensure the safety and stability of the system and has soft starting and soft stopping.

The technical solution of the invention is as follows: a magnetism-moving and voltage-regulating soft starting and positioning device comprises a magnetism-moving and voltage-regulating device, a control system, an activity control system and a voltage-regulating positioning device, wherein the magnetism-moving and voltage-regulating device is a group of multi-phase coils consisting of a plurality of hollow coils, each hollow coil is provided with a track, an iron core column corresponding to the position of the hollow coil is placed on the track in each hollow coil, and the iron core column moves in the hollow coil along the track; the pressure regulating positioning device comprises a travel switch tray, a limiting ejector rod and a limiting switch; the limiting ejector rod is fixed on the iron core column and changes positions along with the movement of the iron core column; the limit switch and the pole position switch are arranged on the travel switch tray; the control system is in communication connection with the activity control system, the pressure regulating and positioning device and the magnetism-shifting and pressure regulating device.

Preferably, the limit switch comprises a final limit switch and a primary limit switch, the final limit switch and the primary limit switch are both provided with two groups of supports, and a steering swing arm is arranged above the supports and is connected with a pin shaft of the supports; the steering swing arms are parallel to each other, the bottom of the support is fixed on the horizontal plane of the travel switch tray, and the plane of the steering swing arms, which exceeds the support, is in a suspended state. The steering swing arm and the support can be integrally cast, and the processing and the assembly are simpler; the whole structure is compact and simple, and the processing and the production are convenient.

Preferably, the face that spacing ejector pin is used for touching limit switch is the ladder face of two-stage, the motion trail of ladder face is parallel and stagger each other, and the two-stage ladder sets up with first limit switch and second limit switch respectively relatively, and the distance of two ladder faces equals first limit switch and second limit switch's distance difference from beginning to end.

Preferably, the free end of the swing arm support is provided with a touch part matched with the limiting ejector rod.

Preferably, the touch part is an O-shaped gasket, so that the touch part is smoothly contacted and has a buffering effect, and the service life of each part is prolonged.

Preferably, pressure regulating positioner still includes utmost point position switch, utmost point position switch includes terminal utmost point position switch and first end utmost point position switch, iron core post initial position is located to first end utmost point position switch, and iron core post end position is located to terminal utmost point position switch.

Preferably, the activity control system comprises a nut, the nut is fixed at the tail of the iron core column, a screw rod connected with the nut is arranged on the support through bearing seats at two ends, the transmission mechanism is connected with a dragging motor fixed on the support, the dragging motor drives the transmission mechanism, and the transmission mechanism drives the iron core column to move in the hollow coil. The control system receives the information feedback of the starting current of the main circuit, orders the dragging motor to rotate positively and negatively, controls the screw rod and the screw nut, the screw nut drives the iron core column to move back and forth on the track, so that the position of the iron core column in the coil is changed, the magnetic permeability of the magnetic medium in the magnetic field of the coil is changed, the magnetic field intensity of the coil is changed, and the inductance (impedance) value of the coil is changed. According to the voltage division principle of the series circuit, the starting voltage of the motor can be stably changed, the soft starting effect of the motor is achieved, and otherwise the soft stop effect of the motor can be achieved.

The invention has the beneficial effects that:

1. the voltage-regulating positioning device is combined with the control system, so that the position of the iron core column can be effectively and accurately positioned according to the starting current. Thereby controlling the starting current magnitude of the starting main motor.

2. Limit switch includes last limit switch and just limit switch, and last limit switch all is equipped with two sets of supports and the steering swing arm of tandem with just limit switch, spacing ejector pin is used for touching limit switch's the face for the ladder face of corresponding two-stage, as long as there is a limit switch work, can accomplish the control of equipment, two limit switch's reliability is superior to a switch, even there is a switch failure, another also can play the switching action in time, can not cause the condition emergence of over-travel damage equipment.

3. And the two sides of the last limit switch and the first limit switch are provided with the pole position switches, and when the control system breaks down and the limit ejector rod pushes against the pole position switches, the pole position switches act to directly disconnect the control power supply of the dragging motor, so that the safety of equipment is ensured.

Drawings

FIG. 1 is a schematic electrical schematic of the present invention;

FIG. 2 is a schematic view of a pressure regulating positioning device of the present invention;

FIG. 3 is a schematic diagram of the initial limit of the present invention;

FIG. 4 is a schematic diagram of the end stop of the present invention;

in the figure: 1. three-phase air core coil, 2, iron core column, 3, transmission mechanism, 4, track, 5, dragging motor, 6, control system, 7, current transformer, 8, high-voltage isolating switch, 9, operation vacuum contactor, 10, starting vacuum contactor, 11, travel switch tray, 12, limit ejector rod, 13, support, 14, screw, 15, first end limit switch, 16, end limit switch, 17, first initial limit switch, 18, second initial limit switch, 19, initial end pole switch, 20, end pole switch.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

Referring to FIGS. 1 to 3: a magnetically-moving and pressure-regulating soft starting and positioning device comprises a high-voltage isolating switch 8, a starting vacuum contactor 10, an operating vacuum contactor 9, a current transformer 7, a magnetically-moving and pressure-regulating device, a control system, a pressure-regulating and positioning device and a movable control system. The magnetic-moving voltage-regulating device is a group of three-phase hollow coils 1 consisting of three hollow coils, tracks 4 are arranged in the three-phase hollow coils 1, iron core columns 2 corresponding to the positions of the three-phase hollow coils 1 are placed on the tracks 4 in each hollow coil, and the iron core columns move in the hollow coils along the tracks 4.

In this embodiment, the motion control system includes a nut 14, the nut 14 is fixed at the tail of the core limb 2, a lead screw connected with the nut 14 is disposed on the bracket 13 through bearing seats at two ends, the transmission mechanism is connected with a driving motor fixed on the bracket 13, the driving motor drives the transmission mechanism, and the transmission mechanism drives the core limb to move in the hollow coil.

In this embodiment, the pressure regulating positioning device includes a travel switch tray, a limit ejector rod, and a limit switch; the limit switch and the pole position switch are arranged on the travel switch tray, and the limit switch comprises a final limit switch and a primary limit switch; the final limit switch comprises a first final limit switch 15, a second final limit switch 16, a first initial limit switch 17 and a second initial limit switch 18; the first end limit switch 15, the second end limit switch 16, the first initial limit switch 17 and the second initial limit switch 18 are all provided with a support, and a steering swing arm is arranged above the support and is connected with a pin shaft of the support; the steering swing arms are parallel to each other, the bottom of the support is fixed on the horizontal plane of the travel switch tray, and the plane of the steering swing arms, which exceeds the support, is in a suspended state. And an O-shaped gasket matched with the limiting ejector rod is arranged at the free end of the swing arm support and used as a touch part.

In this embodiment, the face that the spacing ejector pin is used for touching limit switch is the ladder face of two-stage, the motion trail of ladder face is parallel and stagger each other, and the two-stage ladder corresponds the setting with first last limit switch 15, the last limit switch 16's of second swing arm respectively, and the distance of two ladder faces equals first last limit switch 15, the last limit switch 16's of second distance difference from beginning to end. In this embodiment, two ladder faces are in tandem, correspond to first last limit switch 15, last limit switch 16 of second respectively, so first last limit switch 15, last limit switch 16 of second can touch two ladder faces of spacing ejector pin simultaneously respectively, because first last limit switch 15, last limit switch 16 of second is the controlgear simultaneously, as long as there is a limit switch work, can accomplish the control of equipment, two limit switch's reliability can be superior to a switch certainly like this, even there is a switch failure, another can also play the switching action in time, can not cause the condition emergence of overtravel damage equipment.

As shown in fig. 2, in the initial limit state of the present invention, the limit mandril 12 pushes against the first initial limit switch 17 and the second initial limit switch 18, the first initial limit switch 17 and the second initial limit switch 18 act, the control system 6 receives signals, and when the main motor is started, the dragging motor 5 can only drive the iron core column 2 to operate towards the final limit.

As shown in fig. 3, in the final limit state of the present invention, the limit mandril 12 pushes against the first final limit switch 15 and the second final limit switch 16, the first final limit switch 15 and the second final limit switch 16 act, the control system 6 receives a signal, so that the driving motor 5 stops operating, and after the vacuum contactor 9 is operated and switched on, the driving motor 5 can only drive the core limb 2 to perform the initial limit operation.

In this embodiment, pressure regulating positioner still includes utmost point position switch, utmost point position switch includes first end utmost point position switch 19, terminal utmost point position switch 20, first end utmost point position switch 19 is located the iron core post initial position, and terminal utmost point position switch 20 is located the iron core post end position. Under normal conditions, the limit ejector rod 12 cannot be collided with the initial end pole position switch 19 and the tail end pole position switch 20. Only when the control system 6 has a fault, the primary end pole position switch 19 and the tail end pole position switch 20 act to directly disconnect the dragging motor 5 to control the power supply, so that the safety of the equipment is ensured.

The working process of the invention is illustrated as follows: the three-phase hollow coil 1 is firstly arranged on a bracket 13, a track 4 is arranged in each hollow coil 1, one section of the track 4 is arranged in the coil, one section of the track extends out of the coil, an iron core column 2 is arranged on the track 4 in each hollow coil, the tail parts of the iron core columns 2 are integrated, a screw nut 14 is fixed at the tail parts of the iron core columns 2, a screw rod connected with the screw nut is arranged on the bracket 13 through bearing seats at two ends, and a transmission mechanism 3 at the rear part of the screw rod is connected with a dragging motor 5 fixed on the bracket 13. The control system 6 receives the information feedback of the starting current of the main circuit, sends out an instruction, controls the positive and negative rotation of the dragging motor 5, and changes the position of the iron core column 2 in the coil by driving the iron core column 2 to move back and forth on the track 4 in the coil through the transmission mechanism 3 connected to the dragging motor. Because the position of the iron core column 2 in the coil is changed, the magnetic permeability of a magnetic medium in the coil magnetic Dang is changed, the inductive reactance (impedance) value of the coil is changed, and the soft starting effect of adjustable starting voltage is achieved.

When the AC380V low-voltage control power supply is switched on, the control system 6 starts to work, the driving motor 5 is instructed to drive the transmission mechanism 3 to automatically operate the iron core column 2 to be completely inserted into the coil, namely, the initial limit state, the starting button is pressed, the high-voltage isolating switch 8 and the starting vacuum contactor 10 are switched on simultaneously, at the moment, the inductance (impedance) value of the coil is maximum, the partial pressure is about 60 percent, and the partial pressure can be designed to be 75 percent. The starting current is 0.7-0.9 times of the rated current of the motor (if necessary, the starting current can be designed to be 0.4 times of the rated current of the motor). The current transformer 7 samples the current and supplies the control system 6 to send out the order, drag the electrical machinery 5 to drive the drive mechanism 3 to begin to operate, the iron core column 2 moves outwards slowly, the inductance value of the three-phase air core coil 1 reduces slowly, the starting voltage of the electrical machinery increases steadily, when the iron core column 2 moves to the end point, leave the three-phase air core coil 1 completely, the inductance (impedance) value of the coil at this moment is minimum, the partial pressure is below 5%, namely the starting operating voltage of the electrical machinery can reach above 95%. The maximum starting current value can be set according to the weight of equipment dragged by the motor and the bearing capacity of a power grid. And controlling the starting current to be below the set maximum value of the starting current until the starting is finished, and operating the vacuum contactor 9 to automatically close when the motor reaches the normal rotating speed, wherein the starting is successful and the motor normally runs. And starting the vacuum contactor 10 to open the brake, and withdrawing the three-phase air-core coil 1. And meanwhile, the iron core column moves to the initial limit position to prepare for starting the main motor next time.

The present invention is not limited to the above embodiments, and various combinations and modifications of the above technical features may be provided for those skilled in the art, and modifications, variations, equivalents, or uses of the structure or method of the present invention in other fields without departing from the spirit and scope of the present invention are included in the protection scope of the present invention.