CN113612411B - Magnetic-shift voltage-regulating soft start and positioning device - Google Patents
Magnetic-shift voltage-regulating soft start and positioning device Download PDFInfo
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- CN113612411B CN113612411B CN202110791155.1A CN202110791155A CN113612411B CN 113612411 B CN113612411 B CN 113612411B CN 202110791155 A CN202110791155 A CN 202110791155A CN 113612411 B CN113612411 B CN 113612411B
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- positioning device
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000005389 magnetism Effects 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/34—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive reduction of impedance in secondary circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Control Of Position Or Direction (AREA)
Abstract
The magnetic-transferring voltage-regulating soft starting and positioning device comprises a magnetic-transferring voltage-regulating device, a control system, a movable control system and a voltage-regulating positioning device, wherein the magnetic-transferring voltage-regulating device is a group of multiphase coils formed by 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 each hollow coil, and the iron core columns move in the hollow coils along the tracks; the pressure regulating positioning device comprises a travel switch tray, a limit ejector rod and a limit switch; the limiting ejector rod is fixed on the iron core column, and the positions of the limiting ejector rod and the iron core column are changed 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 voltage regulating and positioning device and the magnetic shift voltage regulating device. The invention is mainly used for soft start and soft stop of the high-voltage motor; the self-adaptive adjustment of the resistance value of the coil is realized through the voltage-regulating positioning device, and the structure is complete and the operation is simple.
Description
Technical Field
The invention relates to a soft start of magnetic shift and voltage regulation, in particular to a positioning device for the soft start, belonging 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, and the reactor has a simple structure, but the reactor value is fixed in the starting process, so that the starting characteristic is hard, secondary impact is easy to generate, and unsuccessful starting is caused when the reactor is selected incorrectly.
The technology of the domestic 6-10kV high-voltage motor soft start product is different from the international advanced level, and at present, the main high-voltage soft start equipment and defects thereof in the country are mainly represented in the following aspects: high-voltage variable-frequency soft start: the price is particularly high, the content of higher harmonic waves is high, the damage to a motor and a power grid is high, the high-voltage frequency conversion technology is still in a development stage, the reliability is poor, and the domestic high-power motor is started by imported frequency conversion monopoly; 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 the piezoelectric thyristors: the harmonic pollution is large, the equalizing and equalizing technology is complex, the cost is high, the price is high, the risk is large, and because a large number of thyristors are connected in series and parallel, the fault points are many, the maintenance is complex, the maintenance is frequent, and the motor capacity is limited.
The equipment has the defects of small adjustment range, complex manufacturing process, unobvious soft effect, incapability of realizing full-automatic voltage and speed regulation control, unstable output voltage, uneven protection function and the like.
Disclosure of Invention
The invention aims to solve the technical problems that: the magnetic-shift voltage-regulating soft start and positioning device has the advantages of overcoming the defects of the prior art, ensuring the safety and stability of the system and having soft start and soft stop by utilizing the related technology of the magnetic field intensity of the self-induction coil.
The technical scheme of the invention is as follows: the magnetic-transferring voltage-regulating soft starting and positioning device comprises a magnetic-transferring voltage-regulating device, a control system, a movable control system and a voltage-regulating positioning device, wherein the magnetic-transferring voltage-regulating device is a group of multiphase coils formed by 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 each hollow coil, and the iron core columns move in the hollow coils along the tracks; the pressure regulating positioning device comprises a travel switch tray, a limit ejector rod and a limit switch; the limiting ejector rod is fixed on the iron core column, and the positions of the limiting ejector rod and the iron core column are changed 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 voltage regulating and positioning device and the magnetic shift voltage regulating device.
Preferably, the limit switch comprises a last limit switch and a first limit switch, wherein the last limit switch and the first limit switch are respectively 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 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. The steering swing arm and the support can be cast integrally, so that the processing and the assembly are simpler; the whole structure is compact and simple, and the processing and the production are convenient.
Preferably, the surface of the limit ejector rod for touching the limit switch is a two-stage stepped surface, the motion tracks of the stepped surfaces are parallel and staggered, the two-stage steps are respectively opposite to the first limit switch and the second limit switch, and the distance between the two stepped surfaces is equal to the front-rear distance difference between the first limit switch and the second limit switch.
Preferably, the free end of the swing arm support is provided with a touch piece matched with the limiting ejector rod.
Preferably, the touch piece is an O-shaped gasket, so that the touch piece is in smooth contact, has a buffering effect, and prolongs the service life of each part.
Preferably, the voltage regulating and positioning device further comprises a pole position switch, the pole position switch comprises a tail end pole position switch and a primary end pole position switch, the primary end pole position switch is arranged at the initial position of the iron core column, and the tail end pole position switch is arranged at the tail end of the iron core column.
Preferably, 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 bracket through bearing seats at two ends, the transmission mechanism is connected with a dragging motor fixed on the bracket, 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 information feedback of the starting current of the main circuit, instructs the dragging motor to operate positively and negatively, controls the screw rod and the screw nut to drive the iron core column to move back and forth on the track, so that the iron core column changes the position in the coil, and changes the magnetic permeability of a magnetic medium in the magnetic field of the coil, so that the magnetic field intensity of the coil can be 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 changed smoothly, the soft starting effect of the motor is achieved, and conversely, the soft stopping effect of the motor can be achieved.
The invention has the beneficial effects that:
1. the voltage regulating and positioning device is combined with the control system, and can effectively and accurately position the iron core column according to the starting current. Thereby controlling the magnitude of the starting current for starting the main motor.
2. The limit switch comprises a last limit switch and a first limit switch, the last limit switch and the first limit switch are respectively provided with a front support and a back support and a steering swing arm, the surfaces of the limit ejector rods used for touching the limit switch are corresponding two-stage step surfaces, the control of the equipment can be completed only by one limit switch, the reliability of the two limit switches is superior to that of the one switch, even if one switch fails, the other switch can timely play a role in switching, and the situation of overtravel damage to the equipment cannot be caused.
3. And pole position switches are arranged on two sides of the final limit switch and the initial limit switch, and when a control system fails and the limit ejector rod is pushed against the pole position switches, the pole position switches act to directly disconnect a control power supply of the dragging motor, so that the safety of equipment is ensured.
Drawings
FIG. 1 is a schematic diagram of the electrical principle of the present invention;
FIG. 2 is a schematic diagram of a pressure regulating positioning device according to the present invention;
FIG. 3 is a schematic illustration of the primary limit of the present invention;
FIG. 4 is a final limit schematic of the present invention;
in the figure: 1. the three-phase air core coil, 2, an iron core column, 3, a transmission mechanism, 4, a track, 5, a dragging motor, 6, a control system, 7, a current transformer, 8, a high-voltage isolating switch, 9, an operating vacuum contactor, 10, a starting vacuum contactor, 11, a travel switch tray, 12, a limit push rod, 13, a support, 14, a nut, 15, a first final limit switch, 16, a final limit switch, 17, a first final limit switch, 18, a second final limit switch, 19, a final end pole switch, 20 and a final end pole switch.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Referring to fig. 1 to 3: a magnetic-shift voltage-regulating soft start and positioning device comprises a high-voltage isolating switch 8, a start vacuum contactor 10, an operation vacuum contactor 9, a current transformer 7, a magnetic-shift voltage-regulating device, a control system, a voltage-regulating positioning device and a movable control system. The magnetic transferring and voltage regulating device is a group of three-phase air core coils 1 formed by three air core coils, tracks 4 are arranged in the three-phase air core coils 1, iron core columns 2 corresponding to the positions of the three-phase air core coils 1 are placed on the tracks 4 in each air core coil, and the iron core columns move in the air core coils along the tracks 4.
In this embodiment, the activity control system includes a nut 14, the nut 14 is fixed at the tail of the core column 2, a screw rod connected with the nut 14 is disposed on the support 13 through bearing seats at two ends, a transmission mechanism is connected with a dragging motor fixed on the support 13, and the dragging motor drives the transmission mechanism, and the transmission mechanism drives the core column to move in the hollow core coil.
In this embodiment, the voltage regulating and 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 last 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 primary limit switch 17 and a second primary limit switch 18; the first final limit switch 15, the second final limit switch 16, the first primary limit switch 17 and the second primary limit switch 18 are respectively 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. 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 piece.
In this embodiment, the surface of the limiting ejector rod for touching the limit switch is a two-stage stepped surface, the motion tracks of the stepped surfaces are parallel and staggered, the two-stage steps are respectively corresponding to the steering swing arms of the first final limit switch 15 and the second final limit switch 16, and the distance between the two stepped surfaces is equal to the front-rear distance difference between the first final limit switch 15 and the second final limit switch 16. In this embodiment, the two step surfaces correspond to the first last limit switch 15 and the second last limit switch 16 respectively, so the first last limit switch 15 and the second last limit switch 16 touch the two step surfaces of the limit push rod simultaneously, because the first last limit switch 15 and the second last limit switch 16 control the equipment simultaneously, the equipment can be controlled as long as one limit switch works, the reliability of the two limit switches is definitely superior to that of one switch, even if one switch fails, the other switch can also play a role in time, and the condition of overtravel damage to the equipment cannot be caused.
As shown in fig. 2, in the initial limit state of the present invention, the limit ejector rod 12 is pushed 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 make the iron core column 2 move towards the final limit.
As shown in fig. 3, in the final limit state of the present invention, the limit ejector rod 12 bumps 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 dragging motor 5 stops running, and after the vacuum contactor 9 is switched on, the dragging motor 5 only can make the core column 2 run toward the initial limit.
In this embodiment, the voltage regulating and positioning device further includes a pole position switch, where the pole position switch includes a primary pole position switch 19 and a tail pole position switch 20, where the primary pole position switch 19 is located at an initial position of the core column, and the tail pole position switch 20 is located at a tail position of the core column. Normally, the limit ejector rod 12 can not be pushed against the initial end position switch 19 and the end position switch 20. Only when the control system 6 has a fault, the primary pole position switch 19 and the tail pole position switch 20 act, and the control power supply of the dragging motor 5 is directly disconnected, so that the safety of equipment is ensured.
The working process of the invention is described as follows: firstly, three-phase air core coils 1 are arranged on a support 13, a track 4 is arranged in each air core coil 1, one section of the track 4 is arranged in the coil, the other section of the track 4 extends out of the coil, an iron core column 2 is arranged on the track 4 in each air core coil, the tail parts of the iron core columns 2 are integrated, a nut 14 is fixed at the tail parts of the iron core columns 2, a screw rod connected with the nut is arranged on the support 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 support 13. The control system 6 receives information feedback of the starting current of the main circuit, sends out an instruction, controls the forward and reverse rotation of the dragging motor 5, drives the iron core column 2 to reciprocate on the track 4 in the coil through the transmission mechanism 3 connected to the dragging motor, and changes the position of the iron core column 2 in the coil. Because the position of the iron core column 2 is changed in the coil, the magnetic permeability of a magnetic medium in the magnetic field of the coil is changed, the inductance (impedance) value of the coil is changed, and the soft starting effect with adjustable starting voltage is achieved.
The AC380V low-voltage control power supply is connected, the control system 6 starts to work, the command drags the motor 5 to drive the transmission mechanism 3 to automatically operate the iron core column 2 into all the inserted coils, namely, in a primary limit state, the starting button is pressed down, the high-voltage isolating switch 8 and the starting vacuum contactor 10 are simultaneously switched on, at the moment, the inductance (impedance) value of the coils is maximum, the partial pressure is about 60 percent (the partial pressure can be designed to be 75 percent). The starting current is between 0.7 and 0.9 times the rated current of the motor (if desired, the starting current can be designed to be 0.4 times the rated current of the motor). The current transformer 7 samples the current and gives out the order to control the system 6, drag the motor 5 to drive the drive mechanism 3 to start running, the core limb 2 moves outwards slowly, the three-phase air core coil 1 inductance value reduces slowly, the motor starting voltage increases steadily, when the core limb 2 moves to the end position, leave the three-phase air core coil 1 completely, the coil inductance (impedance) value is minimum at this moment, the partial pressure is below 5%, namely the starting working voltage of the motor can reach more than 95%. The maximum starting current value can be set according to the weight of the equipment dragged by the motor and the bearing capacity of the power grid. The starting current is controlled below the maximum value of the set starting current until the starting is completed, and when the motor reaches the normal rotation speed, the vacuum contactor 9 is automatically closed, the starting is successful, and the motor runs normally. The vacuum contactor 10 is started to be opened, and the three-phase air core coil 1 is withdrawn. And the iron core column moves towards the initial limit position to prepare for starting the main motor next time.
The above is only an embodiment of the present invention, and it is not intended to limit the present invention, and it is possible for those skilled in the art to have various combinations and modifications of the above technical features, and it is intended to include the present invention in the scope of the present invention, modifications, equivalents, or structures or methods of the present invention for other fields to achieve the same effects without departing from the spirit and scope of the present invention.
Claims (3)
1. The utility model provides a move magnetism pressure regulating soft start and positioner, includes to move magnetism pressure regulating device, control system, activity control system and pressure regulating positioner, its characterized in that: the magnetic transferring and voltage regulating device is a group of multiphase coils formed by a plurality of air core coils, the air core coils are provided with tracks, iron core columns corresponding to the positions of the air core coils are placed on the tracks in each air core coil, and the iron core columns move in the air core coils along the tracks;
the pressure regulating positioning device comprises a travel switch tray, a limit ejector rod and a limit switch;
the limiting ejector rod is fixed on the iron core column, and the positions of the limiting ejector rod and the iron core column are changed 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 movable control system, the voltage regulating and positioning device and the magnetic shift voltage regulating device;
the limit switch comprises a last limit switch and a first limit switch, wherein the last limit switch and the first limit switch are respectively 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 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;
the surface of the limit ejector rod, which is used for touching the limit switch, is a two-stage stepped surface, the motion tracks of the stepped surfaces are parallel and staggered, the two-stage steps are respectively arranged opposite to the first limit switch and the second limit switch, and the distance between the two stepped surfaces is equal to the front-rear distance difference between the first limit switch and the second limit switch;
the free end of the steering swing arm is provided with a touch piece matched with the limiting ejector rod; the touch piece is an O-shaped gasket.
2. The magnetic shift voltage regulating soft start and positioning device according to claim 1, wherein: the voltage regulating and positioning device further comprises a pole position switch, the pole position switch comprises a tail end pole position switch and a primary end pole position switch, the primary end pole position switch is arranged at the initial position of the iron core column, and the tail end pole position switch is arranged at the tail end of the iron core column.
3. The magnetic shift voltage regulating soft start and positioning device according to claim 2, characterized in that: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791155.1A CN113612411B (en) | 2021-07-13 | 2021-07-13 | Magnetic-shift voltage-regulating soft start and positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791155.1A CN113612411B (en) | 2021-07-13 | 2021-07-13 | Magnetic-shift voltage-regulating soft start and positioning device |
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| Publication Number | Publication Date |
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| CN113612411A CN113612411A (en) | 2021-11-05 |
| CN113612411B true CN113612411B (en) | 2024-03-08 |
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| CN117155168B (en) * | 2023-08-15 | 2024-11-26 | 湖南科太科技有限公司 | A dry type voltage regulating soft starting iron core displacement mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002247886A (en) * | 2001-02-20 | 2002-08-30 | Yaskawa Electric Corp | Control method of linear motor |
| CN200998925Y (en) * | 2006-12-20 | 2008-01-02 | 合肥锻压机床有限公司 | Hydraulic cushion stroke stopping means for single-function sheet hydraulic drawing press |
| CN201091065Y (en) * | 2007-03-26 | 2008-07-23 | 谢有神 | High voltage motor magnetism shifting and voltage regulating soft starting device |
| CN101753036A (en) * | 2009-10-19 | 2010-06-23 | 哈尔滨帕特尔科技有限公司 | Switching transformer type power electronic module |
| CN203225690U (en) * | 2012-12-25 | 2013-10-02 | 湖南科太电气有限公司 | Large power high voltage motor voltage reduction voltage regulation combination soft starting device |
| CN208128148U (en) * | 2017-11-18 | 2018-11-20 | 湖南科太电气有限公司 | A kind of magnetosphere transformation voltage-regulating soft starter |
| EP3671798A1 (en) * | 2018-12-21 | 2020-06-24 | ABB Schweiz AG | A mv switching device of the electromagnetic type |
-
2021
- 2021-07-13 CN CN202110791155.1A patent/CN113612411B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002247886A (en) * | 2001-02-20 | 2002-08-30 | Yaskawa Electric Corp | Control method of linear motor |
| CN200998925Y (en) * | 2006-12-20 | 2008-01-02 | 合肥锻压机床有限公司 | Hydraulic cushion stroke stopping means for single-function sheet hydraulic drawing press |
| CN201091065Y (en) * | 2007-03-26 | 2008-07-23 | 谢有神 | High voltage motor magnetism shifting and voltage regulating soft starting device |
| CN101753036A (en) * | 2009-10-19 | 2010-06-23 | 哈尔滨帕特尔科技有限公司 | Switching transformer type power electronic module |
| CN203225690U (en) * | 2012-12-25 | 2013-10-02 | 湖南科太电气有限公司 | Large power high voltage motor voltage reduction voltage regulation combination soft starting device |
| CN208128148U (en) * | 2017-11-18 | 2018-11-20 | 湖南科太电气有限公司 | A kind of magnetosphere transformation voltage-regulating soft starter |
| EP3671798A1 (en) * | 2018-12-21 | 2020-06-24 | ABB Schweiz AG | A mv switching device of the electromagnetic type |
Non-Patent Citations (2)
| Title |
|---|
| 一种高压干式移磁无级调压软起动装置技术;张晓明;;中国农村水利水电(11);全文 * |
| 高压交流电动机的液态软起动;徐欣;中国科技信息(10);全文 * |
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