CN215682151U - Multiphase flow energy transmission rectifier - Google Patents
Multiphase flow energy transmission rectifier Download PDFInfo
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- CN215682151U CN215682151U CN202121246980.5U CN202121246980U CN215682151U CN 215682151 U CN215682151 U CN 215682151U CN 202121246980 U CN202121246980 U CN 202121246980U CN 215682151 U CN215682151 U CN 215682151U
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Abstract
The utility model provides a multiphase flow energy transmission rectifier, which comprises a regulating transformer T1, a synchronous transformer T2 and a three-phase bridge type silicon controlled rectifier T3, wherein the regulating transformer T1 is connected with the synchronous transformer T2; the three-phase alternating current power supply is connected with a primary winding of a synchronous transformer T2 through a voltage regulating transformer T1, a secondary winding of the synchronous transformer T2 is connected with an alternating current input end of a three-phase bridge type silicon controlled rectifier T3, and a direct current output end of the three-phase bridge type silicon controlled rectifier T3 is connected with a load. According to the utility model, voltage rough adjustment is realized through the regulating transformer T1 and the synchronous transformer T2, voltage fine adjustment is realized through the three-phase bridge type silicon controlled rectifier T3, direct current output adopts a combined voltage regulation mode of an on-load regulating transformer and silicon controlled rectifier phase control, different levels of voltage can be output, and wide voltage regulation under high power factor is realized.
Description
Technical Field
The utility model relates to the technical field of rectifiers, in particular to a multiphase flow energy transmission rectifier.
Background
The multiphase flow energy transmission rectifier is used for a scientific test of multiphase flow energy transmission and is used as a critical heat flux density experiment power supply of a fuel assembly, high-voltage alternating current is input into the multiphase flow energy transmission rectifier, controllable direct current is output after voltage reduction of a transformer and rectification of a silicon controlled rectifier are sequentially carried out, the voltage reduction of the transformer is rough regulation, and the rectification of the silicon controlled rectifier is fine regulation. In a traditional multiphase flow energy transmission rectifier, the transformation ratio of a transformer is fixed, the coarse adjustment voltage level is fixed, and experimental power supplies with different voltage levels cannot be provided.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a multiphase flow energy transmission rectifier to solve the problem of fixed coarse tuning voltage level of the conventional multiphase flow energy transmission rectifier.
The technical scheme of the utility model is realized as follows: a multiphase flow energy transmission rectifier comprises a voltage regulating transformer T1, a synchronous transformer T2 and a three-phase bridge type silicon controlled rectifier T3;
the three-phase alternating current power supply is connected with a primary winding of a synchronous transformer T2 through a voltage regulating transformer T1, a secondary winding of the synchronous transformer T2 is connected with an alternating current input end of a three-phase bridge type silicon controlled rectifier T3, and a direct current output end of the three-phase bridge type silicon controlled rectifier T3 is connected with a load.
Optionally, the voltage regulating stage number of the voltage regulating transformer T1 is 27 stages.
Optionally, the winding of the voltage regulating transformer T1 is Ya0 connected.
Optionally, the synchronous transformer T2 includes two identical first transformers and second transformers, the primary sides of the first transformer and the second transformer are extended-edge delta-shaped windings, and the secondary sides of the first transformer and the second transformer are both provided with two three-phase windings;
the three-phase bridge type silicon controlled rectifier T3 comprises a first three-phase bridge type silicon controlled rectifier circuit and a second three-phase bridge type silicon controlled rectifier circuit which are the same, and the first three-phase bridge type silicon controlled rectifier circuit and the second three-phase bridge type silicon controlled rectifier circuit are both formed by two three-phase rectifier bridges;
the three-phase alternating current power supply is respectively connected with primary windings of a first transformer and a second transformer through a voltage regulating transformer T1, two three-phase windings of a secondary side of the first transformer and a first three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, two three-phase windings of a secondary side of the second transformer and a second three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, and direct current output ends of the first three-phase bridge type silicon controlled rectifier circuit and the second three-phase bridge type silicon controlled rectifier circuit are connected in parallel and connected with a load.
Optionally, in the three-phase bridge type silicon controlled rectifier T3, each bridge arm is formed by connecting two silicon controlled rectifiers in parallel in the same direction.
Optionally, in the three-phase bridge type silicon controlled rectifier T3, each silicon controlled rectifier is connected in series with a fast fuse.
Optionally, in the three-phase bridge type silicon controlled rectifier T3, each silicon controlled rectifier is connected in parallel with a resistor-capacitor absorption loop.
Compared with the prior art, the multiphase flow energy transmission rectifier has the following beneficial effects:
(1) voltage rough adjustment is realized through a regulating transformer T1 and a synchronous transformer T2, voltage fine adjustment is realized through a three-phase bridge type silicon controlled rectifier T3, direct current output adopts a combined voltage regulation mode of an on-load regulating transformer and a silicon controlled phase control, different levels of voltage can be output, wide voltage regulation under high power factor is realized, and harmonic interference is reduced;
(2) because the same-phase inverse parallel circuit is adopted, each phase comprises two wires, eddy currents generated on the two wires are mutually offset, the Lorentz force is offset, the copper bar can be prevented from moving, and heating and loss are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a circuit diagram of a multiphase flow energy transfer rectifier of the present invention;
fig. 2 is a circuit diagram of a first three-phase bridge thyristor rectification circuit or a second three-phase bridge thyristor rectification circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the multiphase flow energy transmission rectifier of the present embodiment includes a voltage regulating transformer T1, a synchronous transformer T2, and a three-phase silicon controlled rectifier T3. The three-phase alternating current power supply is connected with a primary winding of a synchronous transformer T2 through a voltage regulating transformer T1, a secondary winding of the synchronous transformer T2 is connected with an alternating current input end of a three-phase bridge type silicon controlled rectifier T3, and a direct current output end of the three-phase bridge type silicon controlled rectifier T3 is connected with a load.
Wherein, the three-phase AC power supply can be 35KV/50 Hz.
The voltage regulation grade of the voltage regulation transformer T1 is controlled by an on-load tap changer which is a 27-grade V-shaped switch, so that the voltage regulation grade of the voltage regulation transformer T1 is 27 grades, and the voltage regulation range can be 20% -100%. The voltage regulating transformer T1 has a stand-alone iron core, and the winding is Ya0 connection method, and the input 35KV and the output 66-223V are realized. The present embodiment achieves coarse adjustment of the voltage by controlling the voltage regulation level of the regulating transformer T1, which is advantageous for providing different levels of dc output.
The synchronous transformer T2 includes two identical first and second transformers, the primary windings of the first and second transformers are extended-edge delta windings, and the secondary windings of the first and second transformers are both provided with two three-phase windings. As shown in fig. 2, the three-phase bridge type silicon controlled rectifier T3 includes two identical first and second three-phase bridge type silicon controlled rectifier circuits, and each of the first and second three-phase bridge type silicon controlled rectifier circuits is composed of two three-phase rectifier bridges. The three-phase alternating current power supply is respectively connected with primary windings of a first transformer and a second transformer through a voltage regulating transformer T1, two three-phase windings of a secondary side of the first transformer and a first three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, two three-phase windings of a secondary side of the second transformer and a second three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, and direct current output ends of the first three-phase bridge type silicon controlled rectifier circuit and the second three-phase bridge type silicon controlled rectifier circuit are connected in parallel and connected with a load.
The first transformer and the second transformer are respectively provided with an independent iron core, the winding connection groups of the first transformer and the second transformer are DZ (-15 degrees)/2 (y11, y5) and DZ (+15 degrees)/2 (y1, y7), the phase difference of 2 windings on each phase of iron core is 180 degrees, the phase of the first transformer is shifted to-15 degrees, the phase of the second transformer is shifted to +15 degrees, the phase difference between the same windings on the secondary sides of the first transformer and the second transformer is 30 degrees, the first transformer and the second transformer share 4 three-phase windings, the first transformer and the second transformer form twelve same-phase inverse-parallel rectification circuits with 4 three-phase rectification bridges of a three-phase bridge type silicon controlled rectifier T3, and the output is 12-pulse direct-current voltage.
The three-phase bridge type silicon controlled rectifier T3 adopts the changing silicon controlled rectifier phase shift angle to fine-tune the output DC voltage, and the conduction angle of the silicon controlled rectifier is 120 degrees. The conduction angle of the controllable silicon is changed by adjusting the phase shift angle, the direct current output voltage is controlled, and the voltage regulating range is 0-100%. The three-phase bridge type silicon controlled rectifier T3 has 24 bridge arms, each bridge arm is formed by connecting two 5000A/1000V silicon controlled rectifiers in parallel in the same direction, namely 48 controllable silicon elements are in total, and more than 3 times of current allowance and more than 3 times of voltage allowance are reserved in the elements, so that the working reliability of the device is ensured; each thyristor is connected with a fast fuse in series, such as RS11 in FIG. 2, namely 48 fast fuses are used as overcurrent protection; each thyristor is connected with a resistance-capacitance absorption loop in parallel and used for overvoltage protection.
In this embodiment, the dc output terminal of the three-phase bridge scr T3 is further connected to a follow current and a voltage dividing resistor, such as resistors RL 1-RL 4 in fig. 1.
In the embodiment, voltage rough adjustment is realized through the regulating transformer T1 and the synchronous transformer T2, voltage fine adjustment is realized through the three-phase bridge type silicon controlled rectifier T3, direct current output adopts a combined voltage regulation mode of an on-load regulating transformer and silicon controlled rectifier phase control, different levels of voltage can be output, and wide voltage regulation under high power factors is realized. By adopting the combined voltage regulation mode, the system is kept to have higher power factor in wide voltage regulation, and harmonic interference is reduced. In practical use, the voltage of the secondary side of the synchronous transformer T2 can be adjusted properly according to the voltage-regulating gear marked by the nameplate, so that the voltage of the secondary side of the synchronous transformer T2 is slightly higher than the required voltage. When the voltage regulator is used, a user can properly select the position of the gear switch of the load voltage regulator according to the required voltage and current values.
In this embodiment, because the effect of circular telegram wire can receive the power in the magnetic field, probably lead to the wire copper bar to take place to remove, also can produce the vortex, produce more generating heat and loss, owing to adopted homophase anti-parallel circuit, each looks has included two lines, and the vortex that produces on two lines offsets mutually, has offset the lorentz power, can avoid the copper bar to remove, reduces and generates heat and the loss.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A multiphase flow energy transmission rectifier is characterized by comprising a regulating transformer T1, a synchronous transformer T2 and a three-phase bridge type silicon controlled rectifier T3;
the three-phase alternating current power supply is connected with a primary winding of a synchronous transformer T2 through a voltage regulating transformer T1, a secondary winding of the synchronous transformer T2 is connected with an alternating current input end of a three-phase bridge type silicon controlled rectifier T3, and a direct current output end of the three-phase bridge type silicon controlled rectifier T3 is connected with a load.
2. The rectifier of claim 1, wherein the voltage regulating transformer T1 has 27 voltage regulating stages.
3. The multiphase flow energy transfer rectifier of claim 1 wherein the winding of the regulating transformer T1 is Ya0 connected.
4. The multiphase flow energy transfer rectifier of claim 1 wherein the synchronous transformer T2 comprises two identical first and second transformers, the first and second transformers having delta-wound primary windings, the first and second transformers each having two three-phase windings on their secondary windings;
the three-phase bridge type silicon controlled rectifier T3 comprises a first three-phase bridge type silicon controlled rectifier circuit and a second three-phase bridge type silicon controlled rectifier circuit which are the same, and the first three-phase bridge type silicon controlled rectifier circuit and the second three-phase bridge type silicon controlled rectifier circuit are both formed by two three-phase rectifier bridges;
the three-phase alternating current power supply is respectively connected with primary windings of a first transformer and a second transformer through a voltage regulating transformer T1, two three-phase windings of a secondary side of the first transformer and a first three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, two three-phase windings of a secondary side of the second transformer and a second three-phase bridge type silicon controlled rectifier circuit form an in-phase inverse parallel bridge type rectifier circuit, and direct current output ends of the first three-phase bridge type silicon controlled rectifier circuit and the second three-phase bridge type silicon controlled rectifier circuit are connected in parallel and connected with a load.
5. The multiphase flow energy transfer rectifier of claim 4 wherein each leg of the three phase bridge thyristor T3 is formed by two thyristors connected in parallel in the same direction.
6. The multiphase flow energy transfer rectifier of claim 4 wherein each thyristor of the three phase bridge thyristor T3 is connected in series with a fast fuse.
7. The multiphase flow energy transfer rectifier of claim 4 wherein each thyristor of the three phase bridge thyristor T3 is connected in parallel with a RC absorption circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121246980.5U CN215682151U (en) | 2021-06-04 | 2021-06-04 | Multiphase flow energy transmission rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121246980.5U CN215682151U (en) | 2021-06-04 | 2021-06-04 | Multiphase flow energy transmission rectifier |
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| Publication Number | Publication Date |
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| CN215682151U true CN215682151U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121246980.5U Active CN215682151U (en) | 2021-06-04 | 2021-06-04 | Multiphase flow energy transmission rectifier |
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| CN (1) | CN215682151U (en) |
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2021
- 2021-06-04 CN CN202121246980.5U patent/CN215682151U/en active Active
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