CN104378008A - Soft starter and air compressor with same - Google Patents
Soft starter and air compressor with same Download PDFInfo
- Publication number
- CN104378008A CN104378008A CN201410750469.7A CN201410750469A CN104378008A CN 104378008 A CN104378008 A CN 104378008A CN 201410750469 A CN201410750469 A CN 201410750469A CN 104378008 A CN104378008 A CN 104378008A
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- China
- Prior art keywords
- soft initiator
- hbv
- conductor device
- pair
- air compressor
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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
- H02P1/265—Means for starting or running a triphase motor on a single phase supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a soft starter which comprises a shell, two pairs of semiconductor devices, a voltage measuring unit, a current measuring unit, a pair of bypass contactors and a third-phase closed circuit. The semiconductor devices are connected in an anti-parallel manner, the semiconductor devices of the first pair are connected to a first-phase closed circuit of an external motor, the second semiconductor devices of the second pair are connected to a second-phase closed circuit of the external motor, the voltage measuring unit is used for measuring voltage of the semiconductor devices, the current measuring unit is used for measuring current flowing through the semiconductor devices, the bypass contactors are integrated in the shell and parallelly connected on the semiconductor devices respectively, and the third-phase closed circuit is directly connected to the external motor. Compared with the prior art, the soft starter has the advantages that the semiconductor devices are connected on the closed circuits as few as possible, so that production cost is lowered; the bypass contact parallelly connected with each pair of the semiconductor devices is integrated in the shell, so that the soft starter is compact in structure, and safety in use of the soft starter is guaranteed.
Description
Technical field
The invention belongs to motor starter technical field, particularly relate to a kind of soft initiator and there is its air compressor.
Background technology
Soft initiator is a kind of Electric Machine Control equipment integrating soft start, soft stop, light-load energy saving and multifunction protection, and its main composition is serially connected with three bidirectional triode thyristors between power supply and controlled motor and electronic control circuit thereof.By controlling the angle of flow of three bidirectional triode thyristors, the output voltage of bidirectional triode thyristor is increased gradually, and motor accelerates gradually, until the full conducting of bidirectional triode thyristor, motor is operated in the mechanical property of rated voltage, realizes smoothly starting, reduce starting current, avoid starting overcurrent tripping.When motor reaches rated revolution, start-up course terminates, and soft initiator exports a switching signal for controlling bypass contactor, provides rated voltage for motor runs well.
In prior art, in soft initiator, be usually provided with three pairs of controllable silicon semiconductor device, with current/voltage during difference corresponding control three-phase electricity access motor.But on the high side due to this type of controllable silicon semiconductor device, has become the cost-determining factor of soft initiator to a certain extent.With other alternative types of devices, such as, in the product competition of frequency converter, can not core competitiveness be given prominence to, cause the market of soft initiator apply be limited in less territory always.Such as, in existing air compressor, usually use frequency converter to realize the soft start function of motor, this conventional configuration become in industry is selected, if the application cost of soft initiator can not reduce further, is then difficult to the mature market entering this type of.
In view of this, continue to provide a kind of soft initiator, to solve the problem.
Summary of the invention
An object of the present invention is to provide a kind of soft initiator solving above-mentioned technology.
The present invention also aims to provide a kind of air compressor.
One of for achieving the above object, the invention provides a kind of soft initiator, it comprises:
Housing;
HBV"liang dui ban" conductor device, wherein, each described HBV"liang dui ban" conductor device is connected by inverse parallel, and the first pair of semiconductor device is connected to the first-phase electric pathway of external motor, and the second pair of semiconductor device is connected to the second-phase electric pathway of external motor;
Voltage measurement unit, for measuring the voltage on described HBV"liang dui ban" conductor device;
Current measuring unit, for measuring the electric current flowing through described HBV"liang dui ban" conductor device;
Be integrated in a pair bypass contactor in described housing, described a pair bypass contactor is connected in parallel on described HBV"liang dui ban" conductor device respectively; Wherein,
Described soft initiator also comprises the direct-connected third phase electric pathway to external motor.
As a further improvement on the present invention, described soft initiator also comprises built in bypass starter, being at least partially integrated in described built in bypass starter of described a pair bypass contactor and third phase electric pathway.
As a further improvement on the present invention, the binding post form of described built in bypass starter three enters three and go out.
As a further improvement on the present invention, described soft initiator also comprises:
Voltage estimation unit, is configured to calculate motor power factor angle according to the voltage on the described HBV"liang dui ban" conductor device measured by described voltage measurement unit.
As a further improvement on the present invention, described soft initiator also comprises:
Current estimation unit, is configured to the input current be applied on described third phase electric pathway according to the electric current the flowing through described HBV"liang dui ban" conductor device estimation measured by described current measuring unit.
As a further improvement on the present invention, described soft initiator also comprises radiator, and one end of described radiator is connected with described built-in bypass contactor, the other end and described contact of semiconductor device.
As a further improvement on the present invention, described HBV"liang dui ban" conductor device is silicon controlled component.
For realizing above-mentioned another goal of the invention, the invention provides a kind of air compressor, comprise air compressor machine assembly and soft initiator, described soft initiator comprises:
Housing;
HBV"liang dui ban" conductor device, wherein, each described HBV"liang dui ban" conductor device is connected by inverse parallel, and the first pair of semiconductor device is connected to the electric pathway of the first-phase of external air compressor machine assembly, and second pair of semiconductor device is suitable for the second-phase electric pathway being connected to external air compressor machine assembly;
Voltage measurement unit, for measuring the voltage on described HBV"liang dui ban" conductor device;
Current measuring unit, for measuring the electric current flowing through described HBV"liang dui ban" conductor device;
Be integrated in a pair bypass contactor in described housing, described a pair bypass contactor is connected in parallel on described HBV"liang dui ban" conductor device respectively; Wherein,
Described soft initiator also comprises the direct-connected third phase electric pathway to external air compressor machine assembly.
As a further improvement on the present invention, described air compressor is screw air compressor.
The invention has the beneficial effects as follows: soft initiator provided by the invention by only arranging semiconductor device on two-phase electric pathway, and the current/voltage on a remaining phase electric pathway utilizes controller and corresponding software to calculate according to the current/voltage on other two-phase electric pathway, thus the semiconductor device saved on a road electric pathway, reduce the production cost of soft initiator; Meanwhile, the bypass contactor in parallel with semiconductor device is integrated in the enclosure interior of soft initiator, makes the application of soft initiator more convenient, what add market can acceptance, and ensure that the use safety of soft initiator.
Accompanying drawing explanation
In order to be illustrated more clearly in the application's execution mode or technical scheme of the prior art, be briefly described to the accompanying drawing used required in execution mode or description of the prior art below, apparently, accompanying drawing in the following describes is only a kind of execution mode of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of the soft initiator system of built in bypass contactor in the embodiment of the invention.
Embodiment
Describe the present invention below with reference to each execution mode shown in the drawings.But these execution modes do not limit the present invention, the structure that those of ordinary skill in the art makes according to these execution modes, method or conversion functionally are all included in protection scope of the present invention.
Although should be understood that first, second grade of term can be used to describe various element or structure in this article, these are described the restriction that object should not be subject to these terms.These terms are only for being distinguished from each other out these description objects.Such as, first-phase electric pathway can be called as second-phase electric pathway, and second-phase electric pathway also can be called as first-phase electric pathway similarly, and this does not deviate from the protection range of the application.The embodiment of the soft initiator 100 of ginseng shown in Fig. 1.In the present embodiment, this soft initiator 100 comprise housing 10, HBV"liang dui ban" conductor device 11,12, voltage measurement unit (not shown), current measuring unit (not shown), voltage estimation unit (not shown), current estimation unit (not shown) and power calculation unit (not shown).
In execution mode shown in Fig. 1, the external three-phase electricity of soft initiator 100 also and then is connected between a motor 200.Well known to those of ordinary skill in the art, this motor 200 can be the motor of any suitable machine or the apparatus be connected with soft initiator, exemplarily, and such as air compressor, fire pump, large server main frame etc.
Each described HBV"liang dui ban" conductor device is connected by inverse parallel, that is, lean against in parallel privately.Preferably, in the present embodiment, this HBV"liang dui ban" conductor device is silicon controlled component; Certainly, in the execution mode that other is replaced at some, this HBV"liang dui ban" conductor device can also be such as thyristor.In the present embodiment, first pair of semiconductor device 11 is connected to the first-phase electric pathway 13 of external motor 200, second pair of semiconductor device 12 is connected to the second-phase electric pathway 14 of external motor 200, meanwhile, soft initiator 100 also comprises the third phase electric pathway 15 of direct-connected external motor 200.
Soft initiator 100 also comprises a pair bypass contactor 21 and 22 be integrated in housing 10, and this pair bypass contactor 21 and 22 respectively correspondence is connected in parallel on HBV"liang dui ban" conductor device 11 and 12.Particularly, bypass contactor 21 is in parallel with semiconductor device 11, and bypass contactor 22 is in parallel with semiconductor device 12.Bypass contactor 21,22 mentioned here can adopt some common switch form, as is well known in the art, bypass contactor can comprise the common switch form such as triode, controllable silicon, relay switch or metal oxide semiconductor field effect tube (Metallic Oxide Semiconductor Field Effect transistor, MOSFET).
In existing design, when soft initiator is connected with motor, need the semiconductor device framework bypass in soft initiator.And the work of these bypass frameworks needs motor manufacturer to complete usually, this can increase the production cost of motor manufacturer extraly, and causes the Difficulty of soft initiator conversely; Further, external bypass contactor easily causes unnecessary production operation accident in the course of the work, pre-buried accident potential.And the bypass contactor 21 and 22 in the present invention is owing to being the inside being integrated in soft initiator 100 housing 10, directly can be supplied to target manufacturer in need directly to install use, do not need interface manufacturer to build bypass extraly, ensure that the security performance of product simultaneously.
In common soft initiator, after soft start is complete, will be directly switch on bypass contactor, after this until start next time, the semiconductor device in soft initiator all can not participate in work again.Meanwhile, ensure that bypass contactor 21,22 normally works, the electric current of its conducting is irreducible; And when bypass contactor 21 and 22 adhesive, do not produce electric arc, but during disjunction, have large electric arc, therefore general bypass contactor has arc-extinguish chamber, and be 1/3rd of its volume.And in the present embodiment, because bypass contactor 21,22 is the inside being integrated in soft initiator 100 housing 10, the words increasing arc-extinguish chamber again can be unfavorable to the circuit arrangement in soft initiator 100 housing, therefore in present embodiment, utilize the feature of soft start, realize turning off with semiconductor device 11,12, namely when bypass contactor 21 and 22 disjunction, first big current is forwarded on semiconductor device 11 and 12, when making bypass contactor 21 and 22 disjunction, bypass contactor 21 and 22 does not have electricity, then can not produce electric arc during its disjunction yet; And semiconductor device 11,12 disjunction time, belong to contactless shutoff, also do not have electric arc to produce, therefore arc-extinguish chamber can be saved, greatly reduced volume.
Voltage measurement unit is for measuring the voltage on HBV"liang dui ban" conductor device 11 and 12, and current measuring unit flows through the electric current of HBV"liang dui ban" conductor device 11 and 12 for measuring.Preferably, voltage measurement unit and current measuring unit can be such as integrated transducers.Voltage estimation unit, is configured to the input voltage be applied to according to the voltage estimate on the HBV"liang dui ban" conductor device 11,12 measured by voltage measurement unit on described third phase electric pathway 15.Current estimation unit is configured to the input current be applied on third phase electric pathway 15 according to the electric current flowing through HBV"liang dui ban" conductor device 11 and 12 estimation measured by current measuring unit.
In the course of work of soft initiator 100, when two-phase in three-phase electricity puts on semiconductor device 11,12 respectively, power-factor angle is calculated according to above-mentioned voltage measurement unit, current measuring unit, voltage estimation unit, current estimation unit by the software of controller and cooperation, and finally obtain the suitable current/voltage that needs to be applied on third phase electric pathway, ensure that third phase electric pathway can not form excessive surge to motor, ensure the steadily reliable of soft start-up process.Controller mentioned here can be the integrated circuit comprising microcontroller (Micro Controller Unit, MCU).Well-known to those skilled in the artly be, microcontroller can comprise CPU (Central Processing Unit, CPU), read-only memory module (Read-Only Memory, ROM), random memory module (Random Access Memory, RAM), time block, digital-to-analogue conversion module (A/D Converter) and some input/output end ports.Certainly, control device 21 also can adopt the integrated circuit of other form, as application-specific IC (Application Specific Integrated Circuits, ASIC) or field programmable gate array (Field-programmable Gate Array, FPGA) etc.
It is worth mentioning that at this, soft initiator 100 also comprises built in bypass starter 30, being at least partially integrated in built in bypass starter 30 of a pair bypass contactor 21 and 22 and third phase electric pathway 15.The binding post form of built in bypass starter 30 three enters three and go out, and has defencive function, the cable needed during wiring or copper bar few, make line simple and convenient.Soft initiator 100 also comprises radiator (not shown), one end of radiator is connected with built-in bypass contactor 21 and 22, the other end contacts with controllable silicon, by arranging radiator, controllable silicon can be dispelled the heat effectively, simultaneously, the less volume of soft initiator 100 can be maintained again, compact conformation.The present invention also provides a kind of air compressor (not shown), and preferably, this air compressor is screw air compressor.Air compressor is by adopting the soft initiator introduced in the respective embodiments described above, the beneficial effect that in the respective embodiments described above, soft initiator has can be obtained, and, owing to not making improvement to other structures of this air compressor or function, therefore also repeat no more in this other structure to this air compressor.
The present invention is by above-mentioned execution mode, there is following beneficial effect: soft initiator provided by the invention by only arranging semiconductor device on two-phase electric pathway, and the current/voltage on a remaining phase electric pathway utilizes controller and corresponding software to calculate according to the current/voltage on other two-phase electric pathway, thus the semiconductor device saved on a road electric pathway, reduce the production cost of soft initiator; Meanwhile, the bypass contactor in parallel with semiconductor device is integrated in the enclosure interior of soft initiator, makes the application of soft initiator more convenient, what add market can acceptance, and ensure that the use safety of soft initiator.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (9)
1. a soft initiator, is characterized in that, comprising:
Housing;
HBV"liang dui ban" conductor device, wherein, each described HBV"liang dui ban" conductor device is connected by inverse parallel, and the first pair of semiconductor device is connected to the first-phase electric pathway of external motor, and the second pair of semiconductor device is connected to the second-phase electric pathway of external motor;
Voltage measurement unit, for measuring the voltage on described HBV"liang dui ban" conductor device;
Current measuring unit, for measuring the electric current flowing through described HBV"liang dui ban" conductor device;
Be integrated in a pair bypass contactor in described housing, described a pair bypass contactor is connected in parallel on described HBV"liang dui ban" conductor device respectively; Wherein,
Described soft initiator also comprises the direct-connected third phase electric pathway to external motor.
2. soft initiator according to claim 1, is characterized in that, described soft initiator also comprises built in bypass starter, being at least partially integrated in described built in bypass starter of described a pair bypass contactor and third phase electric pathway.
3. soft initiator according to claim 2, is characterized in that, the binding post form of described built in bypass starter three enters three and go out.
4. soft initiator according to claim 1, is characterized in that, described soft initiator also comprises:
Voltage estimation unit, is configured to calculate motor power factor angle according to the voltage on the described HBV"liang dui ban" conductor device measured by described voltage measurement unit.
5. soft initiator according to claim 1, is characterized in that, described soft initiator also comprises:
Current estimation unit, is configured to the input current be applied on described third phase electric pathway according to the electric current the flowing through described HBV"liang dui ban" conductor device estimation measured by described current measuring unit.
6. soft initiator according to claim 1, is characterized in that, described soft initiator also comprises radiator, and one end of described radiator is connected with described built-in bypass contactor, the other end and described contact of semiconductor device.
7. soft initiator according to claim 1, is characterized in that, described HBV"liang dui ban" conductor device is silicon controlled component.
8. an air compressor, comprises air compressor machine assembly and soft initiator, it is characterized in that, described soft initiator comprises:
Housing;
HBV"liang dui ban" conductor device, wherein, each described HBV"liang dui ban" conductor device is connected by inverse parallel, and the first pair of semiconductor device is connected to the electric pathway of the first-phase of external air compressor machine assembly, and second pair of semiconductor device is suitable for the second-phase electric pathway being connected to external air compressor machine assembly;
Voltage measurement unit, for measuring the voltage on described HBV"liang dui ban" conductor device;
Current measuring unit, for measuring the electric current flowing through described HBV"liang dui ban" conductor device;
Be integrated in a pair bypass contactor in described housing, described a pair bypass contactor is connected in parallel on described HBV"liang dui ban" conductor device respectively; Wherein,
Described soft initiator also comprises the direct-connected third phase electric pathway to external air compressor machine assembly.
9. air compressor according to claim 8, described air compressor is screw air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410750469.7A CN104378008A (en) | 2014-12-10 | 2014-12-10 | Soft starter and air compressor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410750469.7A CN104378008A (en) | 2014-12-10 | 2014-12-10 | Soft starter and air compressor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104378008A true CN104378008A (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410750469.7A Pending CN104378008A (en) | 2014-12-10 | 2014-12-10 | Soft starter and air compressor with same |
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| Country | Link |
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| CN (1) | CN104378008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116185528A (en) * | 2023-04-27 | 2023-05-30 | 深圳艾为电气技术有限公司 | Flexible configuration method and device for driver software of electric compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202035A (en) * | 1997-06-05 | 1998-12-16 | 佐藤宏仁 | Method of and apparatus for starting AC electric motor |
| US20090015189A1 (en) * | 2006-09-15 | 2009-01-15 | Jurgen Trottmann | Motor starter |
| WO2009009232A2 (en) * | 2007-06-04 | 2009-01-15 | Eaton Corporation | System and method for determining stator winding resistance in an ac motor |
| CN203911811U (en) * | 2014-04-08 | 2014-10-29 | 江西华宜电气有限公司 | Monitoring type built-in bypass soft starter |
| CN204316386U (en) * | 2014-12-10 | 2015-05-06 | 苏州艾克威尔科技有限公司 | Soft initiator and there is its air compressor |
-
2014
- 2014-12-10 CN CN201410750469.7A patent/CN104378008A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202035A (en) * | 1997-06-05 | 1998-12-16 | 佐藤宏仁 | Method of and apparatus for starting AC electric motor |
| US20090015189A1 (en) * | 2006-09-15 | 2009-01-15 | Jurgen Trottmann | Motor starter |
| WO2009009232A2 (en) * | 2007-06-04 | 2009-01-15 | Eaton Corporation | System and method for determining stator winding resistance in an ac motor |
| CN203911811U (en) * | 2014-04-08 | 2014-10-29 | 江西华宜电气有限公司 | Monitoring type built-in bypass soft starter |
| CN204316386U (en) * | 2014-12-10 | 2015-05-06 | 苏州艾克威尔科技有限公司 | Soft initiator and there is its air compressor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116185528A (en) * | 2023-04-27 | 2023-05-30 | 深圳艾为电气技术有限公司 | Flexible configuration method and device for driver software of electric compressor |
| CN116185528B (en) * | 2023-04-27 | 2023-07-21 | 深圳艾为电气技术有限公司 | Flexible configuration method and device for driver software of electric compressor |
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Application publication date: 20150225 |