CN106712587B - A kind of soft starting device - Google Patents
A kind of soft starting device Download PDFInfo
- Publication number
- CN106712587B CN106712587B CN201611217808.0A CN201611217808A CN106712587B CN 106712587 B CN106712587 B CN 106712587B CN 201611217808 A CN201611217808 A CN 201611217808A CN 106712587 B CN106712587 B CN 106712587B
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- Prior art keywords
- contactor
- side plate
- plate
- cabinet
- area
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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
-
- 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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/01—Asynchronous machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of soft starting devices, it is electrically connected between power frequency supply and motor, the soft starting device includes cabinet and the first contactor that is laid in the cabinet, second contactor, and converter unit, the cavity of the cabinet is divided into adjacent first area and second area, and the first contactor and second contactor matching are arranged in the first area, the converter unit setting is in the second region, the input side of the converter unit connects the power frequency supply, the outlet side of the converter unit connects the motor by the first contactor, the motor connects the power frequency supply by the second contactor, and the first contactor and the second contactor electrical interlocks.The embodiment of the present invention has the characteristics that starting current is small, integrated level is high, small in size and motor can be switched to power frequency mode by conversion system.
Description
Technical field
The present invention relates to soft Starting Technology field more particularly to a kind of soft starting devices.
Background technique
10 times for directly initiating electric current and being about rated current of the special three-phase asynchronous motor of crusher, and starting current is excessive
It is easy to cause electrical equipment aging circuit, and then electric appliance problem is caused to take place frequently.In addition, excessive starting current also will cause to electricity
The impact of net, influences grid supply quality.
It is in the prior art usually to increase the Standard Inverter to match with power of motor in major loop to realize motor
Soft start, and need to increase corresponding control loop also to complete motor from conversion system to the switching of power frequency mode to full
The requirement of sufficient crusher.Although this soft start-up scheme can the starting current to motor effectively inhibited, will mark
Quasi- frequency converter and corresponding control loop, which are dispersedly deployed in switchgear, will occupy biggish region in switchgear, to compel
Increase the volume of switchgear, and then needs to provide bigger installation space/place for the placement of switchgear.
In consideration of it, being badly in need of that a kind of starting current is small, integrated level is high, small in size and can be by motor by conversion system at present
It is switched to the soft starting device of power frequency mode.
Summary of the invention
In view of this, the embodiment of the present invention provides, a kind of starting current is small, integrated level is high, small in size and can be by motor
The soft starting device of power frequency mode is switched to by conversion system.
The embodiment of the invention provides a kind of soft starting device, which is electrically connected at power frequency supply and motor
Between, the soft starting device includes cabinet and the first contactor being laid in the cabinet, second contactor and frequency conversion list
Member, the cavity of the cabinet are divided into adjacent first area and second area, and the first contactor and described second
Contactor matching is arranged in the first area, and the converter unit is arranged in the second region, the converter unit
Input side connect the power frequency supply, the outlet side of the converter unit by the first contactor connection motor,
The motor connects the power frequency supply, and the first contactor and second contactor electricity by the second contactor
Gas interlocking.
Preferably, the first area and the second area are divided along the length direction of the cabinet, and described
The length of first area and the second area is identical as the length of the cabinet.
Preferably, the cabinet include bottom plate and enclose the first side plate of the bottom plate, the second side plate, third side plate and
4th side plate, first side plate is opposite with the third side plate, and second side plate is opposite with the 4th side plate, and described
Two contactors against the 4th side plate be arranged on the bottom plate, the first contactor be laid in the second contactor and
Between first side plate.
Preferably, it is corresponded on first side plate and is provided with outlet interface at the position of the first contactor, described
It corresponds on three side plates and is provided at the position of the second contactor into line interface, and the connecting terminal of the first contactor is worn
It crosses the outlet interface and stretches out outside the cabinet, the connecting terminal of the second contactor enters line interface and stretched out described in
Outside the cabinet.
Preferably, mounting plate is additionally provided in the first area, the mounting plate is fixed on the bottom plate, and described
One contactor and second contactor are fixed on the mounting plate.
Preferably, the support plate for fixing the converter unit, the support plate are additionally provided in the second area
Mutually enclose and formed heat dissipation wind channel with the bottom plate, the first side plate, the second side plate and third side plate, the heat dissipation wind channel have into
Air port and air outlet, the air inlet are arranged on first side plate adjacent to the outlet interface, and the air outlet is adjacent to institute
Line interface is stated to be arranged on the third side plate.
Preferably, the converter unit includes at least rectification unit, filter unit and inversion unit, the support plate packet
Rubbing board body and the bending edges perpendicular with the plate body, the plate body plane where the bottom plate in parallel, and the plate body with
First side plate, the second side plate and third side plate are connected, and the bending edges are formed in the plate body far from described second side
On one end of plate, the bending edges are connected with the bottom plate and, the rectification unit setting parallel with second side plate
On the plate body at the position of the air outlet side, the filter unit be arranged on the plate body close to it is described into
At the position of the side in air port, the inversion unit is arranged between the rectification unit and the filter unit.
Preferably, the filter unit is electrolytic capacitor, is provided on the plate body and matches with the electrolytic capacitor
Mounting hole, the electrolytic capacitor pass through the mounting hole and are placed in the heat dissipation wind channel.
Preferably, radiator is additionally provided in the second area, the radiator matching is arranged in heat dissipation wind channel, and
The radiator is between the electrolytic capacitor and the air outlet.
Preferably, it is additionally provided with fan component in the cabinet, the fan component includes blower tray and fan, described
Blower tray is fixedly mounted at the air outlet, and the fan is mounted on the blower tray.
The cavity of cabinet by being divided into adjacent first area and second by the soft starting device of the embodiment of the present invention
Region, and in the first region by first contactor and second contactor matching setting, converter unit is arranged in second area
In.By this setting, the variable frequency starting of motor can be realized to lower starting current by converter unit when on the one hand starting, and
After motor reaches rated power, second contactor closure is disconnected by control first contactor, to realize motor from change
Frequency mode is switched to power frequency mode to meet the use demand of motor；On the other hand by by first contactor, second contactor,
And converter unit is orderly and intensively lays in the chassis to improve the integrated level of the soft starting device, reduce the soft starting device
Volume so that reduce the production cost of the soft starting device.
Detailed description of the invention
In order to illustrate more clearly of first embodiment of the invention technical solution, will make below to required in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of electrical schematic diagram of soft starting device provided in an embodiment of the present invention；
Fig. 2 is a kind of front view of soft starting device provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of internal structure that soft starting device removes after upper cover in Fig. 2；
Fig. 4 is the schematic diagram of internal structure that soft starting device removes another angle after bottom plate in Fig. 3.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Referring to figs. 1 to 4, which is electrically connected between power frequency supply and motor.Wherein, the work
Frequency power is the three-phase 380V AC power that frequency is 50 hertz (Hz).Motor is the dedicated threephase asynchronous machine of crusher.It is broken
If broken owner completes the operations such as broken material such as stone by impact force, the biggish material of volume destroy simultaneously powder
It is broken.It should be noted that crusher starting require be No Load Start, that is, start when crusher broken machine cavity in be no object
Material.Run with load can be just carried out after adjusting after electric motor starting and by low-frequency operation to rated power operation, i.e. motor reaches
It adds materials in the broken machine cavity of crusher after rated power and starts to be crushed material.
The soft starting device 1 include cabinet 10 and be laid in cabinet 10 first contactor 20, second contactor 30 and
Converter unit 40.The cavity of cabinet 10 is divided into adjacent first area A and second area B, and first contactor 20 and
The matching of two contactors 30 is arranged in the A of first area, and converter unit 40 is arranged in second area B, the input of converter unit 40
Side connects power frequency supply, and the outlet side of converter unit 40 connects motor by first contactor 20, and motor passes through second contactor
30 connection power frequency supplies, and first contactor 20 and 30 electrical interlocks of second contactor.
Specifically, which includes that cabinet 10 and matching lid close the upper cover 11 of cabinet 10, and are arranged in upper cover 11
There is parameter setting region C for user's operation.Wherein, parameter setting region C can be by providing key or touch screen for user
Carry out operation setting.The cavity of the cabinet 10 is divided into adjacent first area A and second area B.Wherein, first area A
It is divided with second area B along 10 length direction of cabinet, and the length phase of the length of first area A and second area B and cabinet 10
Together, first contactor 20 and second contactor 30 are placed and second area B can match placement can match in the A of first area
Converter unit 40 and reduce to the greatest extent occupied space be standard divided.In embodiments of the present invention, first area A and the secondth area
Domain B non-rectangular area.
Wherein, first contactor 20 is connected between converter unit 40 and motor, and second contactor 30 connects motor and work
Between frequency power.First contactor 20 and second contactor 30 are A.C. contactor, and first contactor 20 and second contacts
Device 30 should all carry out type selecting according to the rated current of motor.In addition, 30 electrical interlocks of first contactor 20 and second contactor, i.e.,
When first contactor 20 is closed, second contactor 30 is disconnected, and when first contactor 20 disconnects, second contactor 30 is closed.
When starting, " RUN " instruction is inputted by parameter setting region C to control the closure of first contactor 20, the second contact
Device 30 disconnects, and 380V power frequency supply supplies electricity to converter unit 40 and by 40 output low frequency signal of converter unit supply motor so that electricity
Machine starting, converter unit 40 gradually adjust the frequency of frequency variation signal, when the frequency for the frequency variation signal that converter unit 40 exports reaches
After the rated frequency of motor, control first contactor 20 is disconnected, and second contactor 30 is closed, and 380V power frequency supply directly feeds electricity
Machine is to be switched to power frequency operation by converting operation for motor.Controlling motor progress variable frequency starting by converter unit 40 can drop
The starting current of low motor, and starting current can be limited to 1.5 times of current rating electric current or so, and motor can be controlled
Power frequency mode is automatically switched to meet the use demand of motor by conversion system.In addition, the soft starting device 1 is contacted first
Device 20 and the matching of second contactor 30 are arranged in the A of first area, and converter unit 40 is arranged in second area B to realize the
One contactor 20, second contactor 30 and converter unit 40 are placed on orderly and intensively in cabinet 10, soft are opened to reduce this
Standard Inverter and relevant control circuit, are scattered the knot in switchgear by the volume of dynamic device 1 compared to the prior art
For structure, the soft starting device 1 in the embodiment of the present invention has the characteristics that integrated level is high, small in size, at low cost, has higher
Market popularization value, and when the soft starting device 1 be placed in switchgear in use, its occupy switchgear in volume also will
Reduce, and then reduces the volume of switchgear.
Preferably, cabinet 10 includes bottom plate (being not marked in figure) and the first side plate 101, the second side plate for enclosing bottom plate
102, third side plate 103 and third side plate 104, the first side plate 101 is opposite with third side plate 103, the second side plate 102 and third side
Plate 104 is opposite.In embodiments of the present invention, second contactor 30 is arranged on bottom plate against third side plate 104, the first contact
Device 20 is laid between second contactor 30 and the first side plate 101, i.e. first contactor 20 and second contactor 30 is along cabinet 10
Length direction is disposed side by side in the A of first area.It is to be appreciated that the laying position of the first contactor 20 and second contactor 30
Setting can exchange, i.e., first contactor 20 can be arranged on bottom plate against four side plates, and second contactor 30 can be laid in first and connect
Between tentaculum 20 and the first side plate 101, it is not construed as limiting herein.
Mounting plate 50 is additionally provided in the A of first area, mounting plate 50 is fixed on bottom plate, and first contactor 20 and second connects
Tentaculum 30 is fixed on mounting plate 50.When installation, first mounting plate 50 can be fixed on bottom plate, then by first contactor 20
It is fixed by screws on mounting plate 50 with second contactor 30.
Preferably, it is corresponded on the first side plate 101 and is provided with outlet interface 105, third side at the position of first contactor 20
It corresponds to be provided at the position of second contactor 30 on plate 103 and (is not marked in figure) into line interface, and first contactor 20 connects
Line terminals pass through outlet interface 105 and stretch out outside cabinet 10, and the connecting terminal of second contactor 30 is passed through into line interface and stretched out
Outside cabinet 10.
Specifically, for the ease of distinguishing the inlet wire of the soft starting device 1 and the position of outlet, to realize the soft starting device
1 is electrically connected with power frequency supply and the quick of motor, in embodiments of the present invention, is provided on cabinet 10 into line interface and outlet
Interface 105, the outlet interface 105 are arranged on first side plate 101 corresponding with first contactor 20, enter line interface setting and exist
On third side plate 103 corresponding with second contactor 30, and the connecting terminal of first contactor 20 passes through outlet interface 105 simultaneously
It stretches out outside cabinet 10, the connecting terminal of second contactor 30 passes through line interface and stretches out outside cabinet 10.Enter line interface by this
The soft starting device 1 can be quickly electrically connected by the connecting terminal at place with power frequency supply, and by the outlet interface 105
Connecting terminal quickly the soft starting device 1 can be electrically connected with motor.In addition, by entering line interface on cabinet 10 and going out
The setting of line interface 105 can will be separated into and out of line, to avoid mixed in together into and out of line, reduce electric fault
Occurrence probability, and it is convenient for follow-up maintenance.
Preferably, the support plate 12 for fixing converter unit 40 is additionally provided in second area B.Support plate 12 and bottom
Plate, the first side plate 101, the second side plate 102 and 103 phase of third side plate enclose and are formed heat dissipation wind channel, and heat dissipation wind channel has air inlet
Mouth 106 and air outlet (being not marked in figure), air inlet 106 are arranged on the first side plate 101 adjacent to outlet interface 105, air outlet
It is arranged on third side plate 103 adjacent to line interface is entered.
Specifically, support plate 12 is for converter unit 40 to be fixed in second area B, and by with bottom plate, the first side
Plate 101, the second side plate 102 and 103 phase of third side plate enclose and are formed heat dissipation wind channel, to realize the heat dissipation to converter unit 40.
Wherein, converter unit 40 includes at least rectification unit 401, filter unit 402 and inversion unit 403.Rectification unit
401 for changing the alternating current obtained from power frequency supply into direct current.Diode rectifier or brilliant lock can be selected in rectification unit 401
Pipe rectifier etc..Filter unit 402 is used to filter off the ripple in the output voltage of rectification unit 401.Filter unit 402 generally by
Reactance component composition can be such as capacitor, resistance both ends shunt capacitance, resistance series inductance or by capacitor, and inductance composition is answered
Formula filter circuit etc., in embodiments of the present invention, filter unit 402 are made of four electrolytic capacitors.Inversion unit 403 is used for will
The direct current that filter unit 402 exports is converted to alternating current, and half bridge inverter circuit or full-bridge type can be selected in inversion unit 403
Inverter circuit.It is to be appreciated that converter unit 40 can also include control unit, brake unit, driving unit, detection unit
Deng being not construed as limiting herein.Wherein, control unit is opened for realizing the voltage control to rectification unit 401, inversion unit 403
It closes control and conversion system is switched to the switching control etc. of power frequency mode, and the control unit can be selected single-chip microcontroller etc. and realize
Relevant control.Brake unit is applied to the occasion that motor load is bigger, retro-speed is fast, and brake unit is for being produced motor
Raw regenerative electric energy is consumed by braking resistor；Driving unit is used to amplify the signal that control unit exports to drive
The work of the devices such as brilliant lock, and driving unit can select the realizations such as common driving chip or drive amplification circuit to amplify function
Energy.
Support plate 12 is preferably sheet metal component.In embodiments of the present invention, support plate 12 include plate body 120 and with plate body 120
The first perpendicular bending edges 121, the plane where 120 parallel mat of plate body, and plate body 120 and the first side plate 101, second side
Plate 102 and third side plate 103 are connected, and the first bending edges 121 are formed on the one end of plate body 120 far from the second side plate 102,
And first bending edges 121 be connected with bottom plate and parallel with the second side plate 102, control unit is set side by side with rectification unit 401
It sets on plate body 120 at the position of air outlet side, filter unit 402 is arranged on plate body 120 close to air inlet 106
At the position of side, inversion unit 403 is arranged between rectification unit 401 and filter unit 402.
It is to be appreciated that support plate 12 can also include the second bending edges 122, second bending edges 122 and the first bending
Side 121 is symmetricly set on the two sides of ontology 120.It should after the matching of support plate 12 is fixed in second area B by this setting
Second bending edges 122 fit with the second side plate 102, and by bottom plate, the first side plate 101, third side plate 103 and support plate
12 phases are enclosed to form the heat dissipation wind channel.
The mounting hole (being not marked in figure) to match with electrolytic capacitor is provided on plate body 120, each electrolytic capacitor is worn
It crosses corresponding mounting hole to be placed in heat dissipation wind channel, to realize the heat dissipation to filter unit.
Since rectification unit 401 and 403 course of work of inversion unit will also generate a large amount of heat, in order to prevent because of cabinet
10 internal temperatures are excessively high and influence the service performance of device work in cabinet 10, in embodiments of the present invention, preferably second area B
In be additionally provided with radiator 60, the matching of radiator 60 is arranged in heat dissipation wind channel, and radiator 60 is located at electrolytic capacitor and outlet air
Between mouthful, i.e., the radiator 60 is arranged on plate body 120 at position corresponding with rectification unit 401 and inversion unit 403.By
The setting of the radiator 60 can meet the radiating requirements of rectification unit 401 and inversion unit 403, to be the soft starting device 1
Stable operation provide safeguard.
In embodiments of the present invention, fan component 70 is additionally provided in cabinet 10, fan component 70 includes blower tray 701
With fan 702, blower tray 701 is fixedly mounted at air outlet, and fan 702 is mounted on blower tray 701.To improve cabinet
Radiating rate in 10, the interior two adjacent fan components 70 of setting of cabinet 10, to accelerate the flowing speed of air in heat dissipation wind channel
Degree, to improve radiating efficiency.
The above are the preferred embodiments of invention, rather than do limitation in any form to invention.Those skilled in the art
Various equivalent changes and improvement, all equivalent changes done within the scope of the claims can be imposed on the basis of the above embodiments
Change or modify, should all fall within the scope of invention.
Claims (10)
1. a kind of soft starting device, is electrically connected between power frequency supply and motor, which is characterized in that the soft starting device packet
Cabinet and the first contactor being laid in the cabinet, second contactor and converter unit are included, the cavity of the cabinet is drawn
It is divided into adjacent first area and second area, and the first contactor and second contactor matching setting are described the
In one region, in the second region, the input side of the converter unit connects the power frequency electric for the converter unit setting
The outlet side in source, the converter unit connects the motor by the first contactor, and the motor connects by described second
Tentaculum connects the power frequency supply, and the first contactor and the second contactor electrical interlocks.
2. device as described in claim 1, which is characterized in that the first area and the second area are along the cabinet
Length direction divides, and the length of the first area and the second area is identical as the length of the cabinet.
3. device as claimed in claim 2, which is characterized in that the cabinet includes the first of bottom plate and the enclosing bottom plate
Side plate, the second side plate, third side plate and the 4th side plate, first side plate is opposite with the third side plate, second side plate
Opposite with the 4th side plate, the second contactor is arranged on the bottom plate against the 4th side plate, and described first connects
Tentaculum is laid between the second contactor and first side plate.
4. device as claimed in claim 3, which is characterized in that correspond to the position of the first contactor on first side plate
Place is provided with outlet interface, corresponds to and is provided at the position of the second contactor into line interface, and institute on the third side plate
The connecting terminal for stating first contactor passes through the outlet interface and stretches out outside the cabinet, the terminals of the second contactor
Son enters line interface described in and stretches out outside the cabinet.
5. device as claimed in claim 4, which is characterized in that be additionally provided with mounting plate, the installation in the first area
Plate is fixed on the bottom plate, and the first contactor and second contactor are fixed on the mounting plate.
6. device as claimed in claim 4, which is characterized in that be additionally provided in the second area for fixing the frequency conversion
The support plate of unit, the support plate mutually enclose with the bottom plate, the first side plate, the second side plate and third side plate and form heat dissipation
Air duct, the heat dissipation wind channel have air inlet and air outlet, and the air inlet is arranged adjacent to the outlet interface described first
On side plate, the air outlet enters line interface described in and is arranged on the third side plate.
7. device as claimed in claim 6, which is characterized in that the converter unit include at least rectification unit, filter unit,
And inversion unit, the support plate include plate body and the bending edges perpendicular with the plate body, the plate body bottom plate in parallel
The plane at place, and the plate body is connected with first side plate, the second side plate and third side plate, the bending edges are formed
In on the one end of the plate body far from second side plate, the bending edges be connected with the bottom plate and with second side plate
Parallel, the rectification unit is disposed in parallel on the plate body at the position of the air outlet side, and the filtering is single
Member is arranged on the plate body at the position of the side of the air inlet, and the inversion unit is arranged in the rectification unit
Between the filter unit.
8. device as claimed in claim 7, which is characterized in that the filter unit is electrolytic capacitor, is arranged on the plate body
There is the mounting hole to match with the electrolytic capacitor, the electrolytic capacitor passes through the mounting hole and is placed in the heat dissipation wind channel
In.
9. device as claimed in claim 8, which is characterized in that be additionally provided with radiator, the heat dissipation in the second area
Device matching is arranged in heat dissipation wind channel, and the radiator is between the electrolytic capacitor and the air outlet.
10. device as claimed in claim 9, which is characterized in that be additionally provided with fan component, the fan group in the cabinet
Part includes blower tray and fan, and the blower tray is fixedly mounted at the air outlet, and the fan is mounted on the wind
It fans on bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217808.0A CN106712587B (en) | 2016-12-26 | 2016-12-26 | A kind of soft starting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217808.0A CN106712587B (en) | 2016-12-26 | 2016-12-26 | A kind of soft starting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106712587A CN106712587A (en) | 2017-05-24 |
| CN106712587B true CN106712587B (en) | 2019-05-24 |
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ID=58903349
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611217808.0A Active CN106712587B (en) | 2016-12-26 | 2016-12-26 | A kind of soft starting device |
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| Country | Link |
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| CN (1) | CN106712587B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007202230A (en) * | 2006-01-23 | 2007-08-09 | Rohm Co Ltd | Motor driving circuit and cooler using the same |
| CN201197128Y (en) * | 2008-05-01 | 2009-02-18 | 山东蓝星东大化工有限责任公司 | Industrial drawer type soft starter |
| CN202111645U (en) * | 2011-06-21 | 2012-01-11 | 常熟开关制造有限公司(原常熟开关厂） | Soft starter of motor |
| CN104821748A (en) * | 2015-04-30 | 2015-08-05 | 苏州艾克威尔科技有限公司 | Soft starter with current detection apparatus without screw and buckle for fixation |
| CN105281608A (en) * | 2014-05-26 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | High-voltage variable frequency and power frequency switching method |
-
2016
- 2016-12-26 CN CN201611217808.0A patent/CN106712587B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007202230A (en) * | 2006-01-23 | 2007-08-09 | Rohm Co Ltd | Motor driving circuit and cooler using the same |
| CN201197128Y (en) * | 2008-05-01 | 2009-02-18 | 山东蓝星东大化工有限责任公司 | Industrial drawer type soft starter |
| CN202111645U (en) * | 2011-06-21 | 2012-01-11 | 常熟开关制造有限公司(原常熟开关厂） | Soft starter of motor |
| CN105281608A (en) * | 2014-05-26 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | High-voltage variable frequency and power frequency switching method |
| CN104821748A (en) * | 2015-04-30 | 2015-08-05 | 苏州艾克威尔科技有限公司 | Soft starter with current detection apparatus without screw and buckle for fixation |
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| Publication number | Publication date |
|---|---|
| CN106712587A (en) | 2017-05-24 |
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