CN205304650U - Motor high -voltage frequency converters soft start no. 1 drags two devices - Google Patents
Motor high -voltage frequency converters soft start no. 1 drags two devices Download PDFInfo
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- CN205304650U CN205304650U CN201521010196.9U CN201521010196U CN205304650U CN 205304650 U CN205304650 U CN 205304650U CN 201521010196 U CN201521010196 U CN 201521010196U CN 205304650 U CN205304650 U CN 205304650U
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- contactor
- frequency
- frequency transformer
- bypass
- motor
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Abstract
The utility model discloses a motor high -voltage frequency converters soft start no. 1 drags two devices relates to the motor drag field, and the device includes first bypass circuit, and it is including first high -pressure generating line, first high -pressure generating line incoming line breaker, a bypass contactor and the first motor of establishing ties in proper order. The second bypass circuit is including second high pressure generating line, second high pressure generating line incoming line breaker, the 2nd bypass contactor and the second motor of establishing ties in proper order. First frequency converting circuit, including the converter, a first frequency converting circuit and a bypass contactor are parallelly connected, when first frequency converting circuit intercommunication or disconnection, bypass contactor disconnection or closed. The second frequency converting circuit includes the converter that shares with first frequency converting circuit, and second frequency converting circuit and the 2nd bypass contactor are parallelly connected, when second frequency converting circuit intercommunication or disconnection, and disconnection of the 2nd bypass contactor or closure. The utility model discloses can utilize two motors of a converter soft start.
Description
Technical field
The utility model relates to motor drag field, is specifically related to a kind of soft startup one drag two device of motor high-pressure frequency-conversion.
Background technology
In the industrial production, if motor directly starts, its electric current is very big, and the direct starting current of usual electric motor is 4 to 7 times of rated current. This is all bigger to the impact of motor itself and electrical network, thus has influence on electrical machinery life. For the motor of little capacity, the impact of electrical network is not very big by it, and it generally can also be allowed directly to start.
But for comparatively large capacity motor, the impact of electrical network is very big by so big electric current, the normal operation of same electrical network with other loads can be affected, simultaneously owing to the starting current of load is too big, also it is totally unfavorable to the insulation of machine winding, so its startup needs the mode adopting soft startup.
Frequency transformer is that modern electric motors control field technology content is higher, controlling functions is relatively complete, the good electric machine control device of control effects, it regulates rotating speed and the torque of electric motor by change output voltage and frequency, has very big advantage and effect on soft of large-size machine. But the price of frequency transformer is comparatively speaking costly, in some operating mode, having two capacity motors that are the same or that be more or less the same to need to start, often these two motors do not need to start simultaneously, control the soft startup of two motors respectively according to two frequency transformers, this can make to control cost very high.
Practical novel content
For the defect existed in prior art, the purpose of this utility model is to provide the soft startup one drag two device of a kind of motor high-pressure frequency-conversion controlling cost lower.
For reaching above object, the technical scheme that the utility model is taked is: a kind of soft startup one drag two device of motor high-pressure frequency-conversion, comprises,
First bypass circuit, it comprises the first high pressure bus, the first high pressure bus lead-in circuit breaker, the first bypass contactor and the first motor connected successively;
2nd bypass circuit, it comprises the 2nd high pressure bus, the 2nd high pressure bus lead-in circuit breaker, the 2nd bypass contactor and the 2nd motor connected successively;
First frequency conversion circuit, it comprises frequency transformer, and described first frequency conversion circuit is in parallel with described first bypass contactor, and during described first frequency conversion circuit communication, described first bypass contactor disconnects, and when described first frequency conversion circuit disconnects, described first bypass contactor closes; And
2nd frequency conversion circuit, the frequency transformer that it comprises with described first frequency conversion circuit shares, described 2nd frequency conversion circuit is in parallel with described 2nd bypass contactor, and during described 2nd frequency conversion circuit communication, described 2nd bypass contactor disconnects, when described 2nd frequency conversion circuit disconnects, described 2nd bypass contactor closes.
On the basis of technique scheme, described first frequency conversion circuit also comprises the first frequency transformer inlet wire contactor and the first frequency transformer output contactor, described first frequency transformer inlet wire contactor, frequency transformer and the first frequency transformer output contactor are connected successively, and the other end of described first frequency transformer inlet wire contactor is connected with the first bypass contactor with described first high pressure bus lead-in circuit breaker respectively, the other end of described first frequency transformer output contactor is connected with the first motor with described first bypass contactor respectively.
On the basis of technique scheme, described 2nd frequency conversion circuit also comprises the 2nd frequency transformer inlet wire contactor and the 2nd frequency transformer output contactor, described 2nd frequency transformer inlet wire contactor, frequency transformer and the 2nd frequency transformer output contactor are connected successively, and the other end of described 2nd frequency transformer inlet wire contactor is connected with the 2nd bypass contactor with described 2nd high pressure bus lead-in circuit breaker respectively, the other end of described 2nd frequency transformer output contactor is connected with the 2nd motor with described 2nd bypass contactor respectively.
On the basis of technique scheme, described first frequency transformer inlet wire contactor and the first frequency transformer output contactor are alternating current contactor.
On the basis of technique scheme, described 2nd frequency transformer inlet wire contactor and the first frequency transformer output contactor are alternating current contactor.
Compared with prior art, the utility model has the advantage of:
The soft startup one drag two device of motor high-pressure frequency-conversion in the utility model, arranges the first frequency conversion circuit and the 2nd frequency conversion circuit respectively on frequency transformer, and wherein the first frequency conversion circuit is in parallel with the first bypass contactor, and the 2nd frequency conversion circuit is in parallel with the 2nd bypass contactor. Thus achieve VF to WF, allow the first motor and the 2nd motor all realize soft startup by frequency transformer. Whole process only needs a frequency transformer, reduces and control cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the soft startup one drag two device of motor high-pressure frequency-conversion in the utility model.
In figure: 1-first bypass circuit, 11-first high pressure bus, 12-first high pressure bus lead-in circuit breaker, 13-first bypass contactor, 14-first motor, 2-the 2nd bypass circuit, 21-the 2nd high pressure bus, 22-the 2nd high pressure bus lead-in circuit breaker, 23-the 2nd bypass contactor, 24-the 2nd motor, 3-first frequency conversion circuit, 31-first frequency transformer inlet wire contactor, 32-first frequency transformer output contactor, 4-the 2nd frequency conversion circuit, 41-the 2nd frequency transformer inlet wire contactor, 42-the 2nd frequency transformer output contactor, 5-frequency transformer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Shown in Figure 1, the utility model provides a kind of soft startup one drag two device of motor high-pressure frequency-conversion, comprises the first bypass circuit 1, the 2nd bypass circuit 2, first frequency conversion circuit 3, the 2nd frequency conversion circuit 4.
Wherein the first bypass circuit 1 comprises the first high pressure bus 11, first high pressure bus lead-in circuit breaker 12, first bypass contactor 13 and the first motor 14 connected successively.
2nd bypass circuit 2 comprise connect successively the 2nd high pressure bus 21, the 2nd high pressure bus lead-in circuit breaker the 22, the 2nd bypass contactor 23 and the 2nd motor 24.
First frequency conversion circuit 3 is in parallel with the first bypass contactor 13, it comprises the first frequency transformer inlet wire contactor 31, frequency transformer 5 and the first frequency transformer output contactor 32, first frequency transformer inlet wire contactor 31, frequency transformer 5 and the first frequency transformer output contactor 32 are connected successively, and first the other end of frequency transformer inlet wire contactor 31 be connected with the first bypass contactor 13 with the first high pressure bus lead-in circuit breaker 12 respectively, the other end of the first frequency transformer output contactor 32 is connected with the first motor 14 with the first bypass contactor 13 respectively.
2nd frequency conversion circuit 4 is in parallel with the 2nd bypass contactor 23, and it comprises the 2nd frequency transformer inlet wire contactor 41 and the first frequency conversion circuit 3 shared frequency transformer 5 and the 2nd frequency transformer output contactor 42. 2nd frequency transformer inlet wire contactor 41, frequency transformer 5 and the 2nd frequency transformer output contactor 42 are connected successively, and the 2nd the other end of frequency transformer inlet wire contactor 41 be connected with the 2nd bypass contactor 23 with the 2nd high pressure bus lead-in circuit breaker 22 respectively, the other end of the 2nd frequency transformer output contactor 42 is connected with the 2nd motor 24 with the 2nd bypass contactor 23 respectively.
Mainly introduce the principle of the soft startup one drag two device of motor high-pressure frequency-conversion in the utility model below:
First the first motor 14 is started, after setting correlation parameter, frequency transformer 5 is pre-charged, now the first high pressure bus lead-in circuit breaker 12, first frequency transformer inlet wire contactor 31 and the first frequency transformer output contactor 32 close, and run frequency transformer 5, when frequency transformer 5 runs to 50Hz, first frequency transformer inlet wire contactor 31 and the first frequency transformer output contactor 32 all disconnect, first bypass contactor 13 closes, it is achieved VF to WF, thus the first motor 14 just starts to run under power frequency.
Then the 2nd motor 24 is started, after setting correlation parameter, frequency transformer 5 is pre-charged, now the 2nd high pressure bus lead-in circuit breaker 22,2nd frequency transformer inlet wire contactor 41 and the 2nd frequency transformer output contactor 42 close, and run frequency transformer 5, when frequency transformer 5 runs to 50Hz, 2nd frequency transformer inlet wire contactor 41 and the 2nd frequency transformer output contactor 42 all disconnect, 2nd bypass contactor 23 closes, it is achieved VF to WF, thus the 2nd motor 24 just starts to run under power frequency. Arrive this, just achieve the one drag two function that a frequency transformer drags two soft starter for motor.
In addition, in general frequency transformer be in stopping state could switching contactor, in frequency transformer operational process, forbid independent start and stop motor or multiple electric motors. In order to can start and stop motor at any time, the first frequency transformer inlet wire contactor 31, first frequency transformer output contactor 32 in the utility model, the 2nd frequency transformer inlet wire contactor 41 and the 2nd frequency transformer output contactor 42 are alternating current contactor.
The soft startup one drag two device of motor high-pressure frequency-conversion in the utility model, frequency transformer 5 arranges the first frequency conversion circuit 3 and the 2nd frequency conversion circuit 4 respectively, wherein the first frequency conversion circuit 3 is in parallel with the first bypass contactor 13, and the 2nd frequency conversion circuit 4 is in parallel with the 2nd bypass contactor 23. Thus achieve VF to WF, allow the first motor 14 and the 2nd motor 24 all realize soft startup by frequency transformer 5. Whole process only needs a frequency transformer 5, so that it may successively to drag the first motor 14 and the 2nd motor 24, well reduce and control cost.
The utility model is not only confined to above-mentioned preferred forms; anyone can draw the product of other various forms under enlightenment of the present utility model; no matter but in its shape or structure, do any change; every have the technical scheme identical or close with the utility model, all within its protection domain.
Claims (5)
1. the soft startup one drag two device of motor high-pressure frequency-conversion, it is characterised in that: comprise,
First bypass circuit (1), it comprises the first high pressure bus (11), the first high pressure bus lead-in circuit breaker (12), the first bypass contactor (13) and the first motor (14) connected successively;
2nd bypass circuit (2), it comprises the 2nd high pressure bus (21), the 2nd high pressure bus lead-in circuit breaker (22), the 2nd bypass contactor (23) and the 2nd motor (24) connected successively;
First frequency conversion circuit (3), it comprises frequency transformer (5), described first frequency conversion circuit (3) is in parallel with described first bypass contactor (13), and during described first frequency conversion circuit (3) connection, described first bypass contactor (13) disconnects, when described first frequency conversion circuit (3) disconnects, described first bypass contactor (13) closes; And
2nd frequency conversion circuit (4), the frequency transformer (5) that it comprises with described first frequency conversion circuit (3) shares, described 2nd frequency conversion circuit (4) is in parallel with described 2nd bypass contactor (23), and during described 2nd frequency conversion circuit (4) connection, described 2nd bypass contactor (23) disconnects, when described 2nd frequency conversion circuit (4) disconnects, described 2nd bypass contactor (23) closes.
2. the soft startup one drag two device of motor high-pressure frequency-conversion as claimed in claim 1, it is characterized in that: described first frequency conversion circuit (3) also comprises the first frequency transformer inlet wire contactor (31) and the first frequency transformer output contactor (32), described first frequency transformer inlet wire contactor (31), frequency transformer (5) and the first frequency transformer output contactor (32) are connected successively, and the other end of described first frequency transformer inlet wire contactor (31) is connected with the first bypass contactor (13) with described first high pressure bus lead-in circuit breaker (12) respectively, the other end of described first frequency transformer output contactor (32) is connected with the first motor (14) with described first bypass contactor (13) respectively.
3. the soft startup one drag two device of motor high-pressure frequency-conversion as claimed in claim 2, it is characterized in that: described 2nd frequency conversion circuit (4) also comprises the 2nd frequency transformer inlet wire contactor (41) and the 2nd frequency transformer output contactor (42), described 2nd frequency transformer inlet wire contactor (41), frequency transformer (5) and the 2nd frequency transformer output contactor (42) are connected successively, and the other end of described 2nd frequency transformer inlet wire contactor (41) is connected with the 2nd bypass contactor (23) with described 2nd high pressure bus lead-in circuit breaker (22) respectively, the other end of described 2nd frequency transformer output contactor (42) is connected with the 2nd motor (24) with described 2nd bypass contactor (23) respectively.
4. the soft startup one drag two device of motor high-pressure frequency-conversion as claimed in claim 2 or claim 3, it is characterised in that: described first frequency transformer inlet wire contactor (31) and the first frequency transformer output contactor (32) they are alternating current contactor.
5. the soft startup one drag two device of motor high-pressure frequency-conversion as claimed in claim 3, it is characterised in that: described 2nd frequency transformer inlet wire contactor (41) and the first frequency transformer output contactor (42) they are alternating current contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521010196.9U CN205304650U (en) | 2015-12-07 | 2015-12-07 | Motor high -voltage frequency converters soft start no. 1 drags two devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521010196.9U CN205304650U (en) | 2015-12-07 | 2015-12-07 | Motor high -voltage frequency converters soft start no. 1 drags two devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304650U true CN205304650U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521010196.9U Expired - Fee Related CN205304650U (en) | 2015-12-07 | 2015-12-07 | Motor high -voltage frequency converters soft start no. 1 drags two devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636638A (en) * | 2020-11-11 | 2021-04-09 | 中盐华能储能科技有限公司 | Multi-drive-motor public frequency converter structure of compressed air energy storage power station and control method |
| CN114289168A (en) * | 2021-12-29 | 2022-04-08 | 内蒙古超牌新材料股份有限公司 | Depolymerizing machine system and starting method thereof |
-
2015
- 2015-12-07 CN CN201521010196.9U patent/CN205304650U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636638A (en) * | 2020-11-11 | 2021-04-09 | 中盐华能储能科技有限公司 | Multi-drive-motor public frequency converter structure of compressed air energy storage power station and control method |
| CN114289168A (en) * | 2021-12-29 | 2022-04-08 | 内蒙古超牌新材料股份有限公司 | Depolymerizing machine system and starting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20181207 |