CN202043048U - N-phase bridge-type power rectified power source - Google Patents
N-phase bridge-type power rectified power source Download PDFInfo
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- CN202043048U CN202043048U CN 201120139654 CN201120139654U CN202043048U CN 202043048 U CN202043048 U CN 202043048U CN 201120139654 CN201120139654 CN 201120139654 CN 201120139654 U CN201120139654 U CN 201120139654U CN 202043048 U CN202043048 U CN 202043048U
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Abstract
The utility model relates to an N-phase bridge-type power rectified power source, which is formed by connecting N/3 groups of three-phase bridge-type rectifying units and a three-phase transformer, wherein the outputs of the N/3 groups of three-phase bridge-type rectifying units are connected in parallel; power is directly supplied to one group of three-phase bridge-type rectifying units by a three-phase power grid; and power is supplied to the rest groups of three-phase bridge-type rectifying units by the three-phase transformer, wherein N is the integral multiple of 3 and is more than or equal to 6. Power is directly supplied to one group of three-phase bridge-type rectifying units by the three-phase power grid, and power is supplied to the rest groups of three-phase bridge-type rectifying units by the three-phase transformer, so that parts of the output power of the rectified power source are transmitted so as to reduce the apparent capacity of the three-phase transformer; further, the secondary edges of the three-phase transformer are connected by adopting an appropriate connection method so as to further reduce the apparent capacity of the three-phase transformer; and meanwhile, the transformer has a simple connection method and few coils.
Description
Technical field
The utility model relates to rectifier power source, especially relates to speed regulating device bridge-type power commutating power supply.
Background technology
The three-phase bridge power commutating power supply has obtained using widely in speed regulating device, and the three-phase bridge rectification unit is general, and the phase voltage value of negotiation electrical network is U directly by the three phase network power supply, and the direct current of rectifier power source output is pressed with 6 pulsation, during resistive load, during peak value
Valley equals cos30 °=0.866 with the ratio of peak value.
If the number of phases N=6 of rectifier power source, 9.... etc., then the output voltage peak value is
The ratio of valley and peak value equal cos (90 °/N).N=6 or 9 o'clock, cos (90 °/N)=0.966 or 0.985 approached very much 1.The power commutating power supply that this N is bigger, solving at present by multipleization to N/3 group three-phase bridge rectification unit power supply; That is obtain N/3 by the secondary of the different connections of a three-phase transformer and organize the three phase mains of isolating.Their line magnitude of voltage equates.The phase place 90 °/N that then staggers.And the N/3 that obtains multipleization power supply organizes the output-parallel of three-phase bridge rectification unit, perhaps forward series connection.Respectively organize bridge-type three phase rectifier unit output current during output-parallel and differ bigger, preferably the N/3 value is 2 or 3.
The VD value of the power commutating power supply that above-mentioned N is bigger is not limit.Because the turn ratio of the former secondary of transformer can be selected.But so the power of rectifier power source output transmits through transformer entirely, and the apparent capacity of transformer is necessarily greater than the power output of rectifier power source, i.e. λ 〉=1.The apparent capacity of transformer is big, and volume, weight, cost, loss are corresponding also just bigger.
The utility model content
The utility model purpose is in order to overcome the defective of above-mentioned prior art, a kind of N phase bridge-type power commutating power supply is provided, adopt three phase network directly to give wherein one group of three-phase bridge rectification unit power supply, and the three-phase transformer secondary is to all the other group three-phase bridge rectification unit power supplies, make the rectifier power source power output partly transmit, to reduce the apparent capacity of three-phase transformer through three-phase transformer.
For achieving the above object, the utility model provides a kind of N phase bridge-type power commutating power supply, be connected into by N/3 group three-phase bridge rectification unit and a three-phase transformer, the output-parallel of N/3 group three-phase bridge rectification unit, wherein, one group of three-phase bridge rectification unit is directly powered by three phase network, and all the other group three-phase bridge rectification unit are by the power supply of three-phase transformer secondary, and wherein the N value is 3 a integral multiple and more than or equal to 6.
When N/3 organized the output-parallel of three-phase bridge rectification unit, each was organized three-phase bridge rectification unit output current and differs bigger, and preferably the N value is 6 or 9.
When the N value is 6,2 groups of three-phase bridge rectification unit are correspondingly arranged in the bridge-type power commutating power supply, the former limit of three-phase transformer is powered by three phase network ABC, another group three-phase bridge rectification unit is by three-phase transformer secondary A1B 1C 1 power supply, three-phase transformer has 6 coils, former limit winding and secondary winding are connected into triangle and star respectively, or are connected into star and triangle respectively, and the apparent capacity of three-phase transformer is λ=0.5 with the ratio of rectifier power source power output.
When the N value is 9,3 groups of three-phase bridge rectification unit are correspondingly arranged in the bridge-type power commutating power supply, the former limit of three-phase transformer is the three phase network ABC power supply of U by phase voltage value, two groups of three-phase bridge rectification unit are respectively by three-phase transformer two secondary A1B1C1 and A2B2C2 power supply in addition, three-phase transformer has 15 or 12 coils, former limit winding is connected into triangle or star, the phase voltage value of two groups of secondary outputs is U, phase place than the reach of the phase voltage of three phase network ABC or after move 40 °, the former limit apparent power of three-phase transformer is 2 (1-cos40 °)/3 with the ratio of rectifier power source power output.
The secondary winding has three kinds of connections, and with three phase network ABC self coupling, the ratio of transformer apparent capacity and rectifier power source power output is less than 0.362.
Former limit winding is connected into triangle, and three-phase transformer has 15 coils, respectively serially add on the basis of three phase network ABC one by two phase voltages that series coil provided after, obtain three phase mains A0B0C0, the magnitude of voltage on two series coils all is
The phase voltage value of three phase mains A0B0C0 is Ucos40 °, and phase place is identical with the phase voltage of three phase network ABC; Serially add a coil between three phase mains A0B0C0 and secondary A1B1C1 and secondary A2B2C2, this coil voltage is Usin40 °, and phase place is identical with the opposite side at triangle ABC angle, the ratio of three-phase transformer apparent capacity and rectifier power source power output
Former limit winding is connected into star, and three-phase transformer has 15 coils, serially adds a voltage that is provided by two series coils between three phase network ABC and secondary A1B1C1 and secondary A2B2C2, and the magnitude of voltage of a coil is
The magnitude of voltage of another coil is
The ratio of three-phase transformer apparent capacity and rectifier power source power output
Former limit winding is connected into star, and three-phase transformer has 12 coils, respectively serially adds a coil on the basis of three phase network ABC, and this coil voltage is identical with electrical network phase voltage phase place, and magnitude of voltage is
Can obtain three phase mains A0B0C0, the phase voltage value of three phase mains A0B0C0 is
Phase place is identical with the phase voltage of ABC electrical network; String has phase voltage value to be between A0B0C0 and A1B1C1 and A2B2C2
Coil; The three-phase transformer apparent capacity with the ratio of rectifier power source power output is
Further, the influence that produces by the transformer leakage reactance when carrying for eliminating the rectifier power source band, can on direct three inlets, go here and there an AC reactor respectively by that group three-phase bridge rectification unit of three phase network power supply, the specification of three AC reactor is identical, and reactance value equates with all the other transformer leakage reactance values of organizing on three-phase bridge rectification unit inlet.
The N phase bridge-type power commutating power supply that the utility model provides, adopt three phase network directly to give wherein one group of three-phase bridge rectification unit power supply, and the three-phase transformer secondary is to all the other group three-phase bridge rectification unit power supplies, make the rectifier power source power output partly transmit, to reduce the apparent capacity of three-phase transformer through three-phase transformer; And, reduce the apparent capacity of three-phase transformer further by the three-phase transformer secondary is adopted suitable connection, and the connection of transformer is simple simultaneously, and the coil number is less; Further, directly by the inlet string AC reactor of that group three-phase bridge rectification unit of three phase network power supply, the influence that produces by the transformer leakage reactance when carrying to eliminate the rectifier power source band.
Description of drawings
Fig. 1 is the utility model nine phase bridge-type power commutating power supply schematic diagrames;
A kind of connection of three-phase transformer in Fig. 2 the utility model nine phase bridge-type power commutating power supplies;
The another kind of connection of three-phase transformer in Fig. 3 the utility model nine phase bridge-type power commutating power supplies;
Another connection of three-phase transformer in Fig. 4 the utility model nine phase bridge-type power commutating power supplies.
Embodiment
The utility model is perfect condition when computational analysis transformer apparent capacity and rectifier power source power output.Omitted the pressure drop of transformer former limit no-load current and secondary leakage reactance, assert that simultaneously each is symmetrical mutually, each cross streams power source voltage and output current all equate, and the phase place of electric current is consistent with phase voltage.
The transformer apparent capacity equals half of the total apparent power of the former secondary winding of transformer, and directly and the volume of transformer, weight is relevant with cost.The utility model adopts the ratio λ of transformer apparent capacity and rectifier power source power output to do index when judging the transformer apparent capacity, test and operate comparatively convenient.
The utility model provides a kind of N phase bridge-type power commutating power supply, be connected into by N/3 group three-phase bridge rectification unit and a three-phase transformer, the output-parallel of N/3 group three-phase bridge rectification unit, wherein, one group of three-phase bridge rectification unit is directly powered by three phase network, all the other group three-phase bridge rectification unit are by the power supply of three-phase transformer secondary, and wherein the N value is 3 a integral multiple and more than or equal to 6.The N value is 9, and what Fig. 1 showed is nine phase bridge-type power commutating power supply schematic diagrames.Three-phase bridge rectification unit U1 is directly powered by three phase network, and three-phase bridge rectification unit U2 and three-phase bridge rectification unit U3 are by the power supply of three-phase transformer secondary, and the output-parallel of three-phase bridge rectification unit U1, U2, U3 connects load.
When N/3 organized the output-parallel of three-phase bridge rectification unit, each was organized three-phase bridge rectification unit output current and differs bigger, and preferably the N value is 6 or 9.
When the N value is 6, N phase bridge-type power commutating power supply is 6 phase bridge-type power commutating power supplies, 2 groups of three-phase bridge rectification unit are correspondingly arranged in the bridge-type power commutating power supply, the output-parallel of 2 groups of three-phase bridge rectification unit, the former limit of one group of three phase rectifier unit and three-phase transformer is the three phase network ABC power supply of U by phase voltage value, another group three-phase bridge rectification unit is powered by three-phase transformer secondary A1B1C1, the former secondary insulation of transformer, the no-load voltage ratio of line voltage is 1, and the peak value of 30 ° of rectifier power source output voltages of phase shifting is
Valley equals cos15 ° with the ratio of peak value.Former limit winding and secondary winding are connected into triangle and star respectively, or are connected into star and triangle respectively, and the apparent capacity of three-phase transformer is λ=0.5 with the ratio of rectifier power source power output.Three-phase transformer has 6 coils.
When the N value is 9, N phase bridge-type power commutating power supply is nine phase bridge-type power commutating power supplies, 3 groups of three-phase bridge rectification unit are correspondingly arranged in the bridge-type power commutating power supply, the output-parallel of 3 groups of three-phase bridge rectification unit, the former limit of one group of three phase rectifier unit and three-phase transformer is the three phase network ABC power supply of U by phase voltage value, two groups of three-phase bridge rectification unit are respectively by three-phase transformer two secondary A1B1C1 and A2B2C2 power supply in addition, the phase voltage value of two groups of secondary outputs is U, phase place than the reach of the phase voltage of three phase network ABC or after move 40 °, the peak value of rectifier power source output voltage is
Valley equals cos10 ° with the ratio of peak value.Former limit winding is connected into triangle or star, and the former limit apparent power of three-phase transformer is 2 (1-cos40 °)/3 with the ratio of rectifier power source power output.Three-phase transformer has 15 or 12 coils.
The secondary winding has three kinds of connections, and with three phase network ABC self coupling, the ratio of transformer apparent capacity and rectifier power source power output is less than 0.362.
Fig. 2 is a kind of connection of three-phase transformer in the nine phase bridge-type power commutating power supplies.The former limit winding of dotted line indication transformer, former limit winding is connected into triangle, respectively serially add on the basis of three phase network ABC one by two phase voltages that series coil provided after, obtain three phase mains A0B0C0, the magnitude of voltage on two series coils all is
The phase voltage value of three phase mains A0B0C0 is Ucos40 °, and phase place is identical with the phase voltage of three phase network ABC; Serially add a coil respectively between three phase mains A0B0C0 and secondary A1B1C1 and secondary A2B2C2, this coil voltage is 40 ° of U sin, and phase place is identical with the opposite side of triangle ABC, the ratio of three-phase transformer apparent capacity and rectifier power source power output
This moment, three-phase transformer had 15 coils.
Fig. 3 is the another kind of connection of three-phase transformer in the nine phase bridge-type power commutating power supplies.The former limit winding of dotted line indication transformer, former limit winding is connected into star, serially adds a voltage that is provided by two series coils between three phase network ABC and secondary A1B1C1 and secondary A2B2C2, and the magnitude of voltage of a coil is
The magnitude of voltage of another coil is
The ratio of three-phase transformer apparent capacity and rectifier power source power output
This moment, three-phase transformer had 15 coils.
Fig. 4 is another connection of three-phase transformer in the nine phase bridge-type power commutating power supplies.The former limit winding of dotted line indication transformer, former limit winding is connected into star, respectively serially adds a coil on the basis of three phase network ABC, and this coil voltage is identical with electrical network phase voltage phase place, and magnitude of voltage is
Can obtain three phase mains A0B0C0, the phase voltage value of three phase mains A0B0C0 is
Phase place is identical with the phase voltage of ABC electrical network; String has phase voltage value to be between A0B0C0 and A1B1C1 and A2B2C2
Coil; The three-phase transformer apparent capacity with the ratio of rectifier power source power output is
This value is big slightly with respect to above-mentioned second kind of connection 0.326, but has reduced the three-phase transformer coil number, reduces to 12 by 15.
Can also carry out performance improvement further to above-mentioned N phase bridge-type power commutating power supply, can on direct three inlets, go here and there an AC reactor respectively by that group three-phase bridge rectification unit of three phase network power supply, the specification of three AC reactor is identical, reactance value equates with all the other transformer leakage reactance values of organizing on three-phase bridge rectification unit inlet, the influence that produces by the transformer leakage reactance when carrying to eliminate the rectifier power source band
The N phase bridge-type power commutating power supply that the utility model provides, the output-parallel of N/3 three-phase bridge rectification power supply, adopt three phase network directly to give wherein one group of three-phase bridge rectification unit power supply, and the three-phase transformer secondary is to all the other group three-phase bridge rectification unit power supplies, make the rectifier power source power output partly transmit, to reduce the apparent capacity of three-phase transformer through three-phase transformer; And, reduce the apparent capacity of three-phase transformer further by the three-phase transformer secondary is adopted suitable connection, and the connection of transformer is simple simultaneously, and the coil number is less; Further, directly by the inlet string AC reactor of that group three-phase bridge rectification unit of three phase network power supply, the influence that produces by the transformer leakage reactance when carrying to eliminate the rectifier power source band.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (9)
1. N phase bridge-type power commutating power supply, be connected into by N/3 group three-phase bridge rectification unit and a three-phase transformer, the output-parallel of N/3 group three-phase bridge rectification unit, it is characterized in that, one group of three-phase bridge rectification unit is directly powered by three phase network, all the other group three-phase bridge rectification unit are by the power supply of three-phase transformer secondary, and wherein the N value is 3 a integral multiple and more than or equal to 6.
2. N phase bridge-type power commutating power supply according to claim 1 is characterized in that the N value is 6.
3. N phase bridge-type power commutating power supply according to claim 2, it is characterized in that, the former limit of three-phase transformer is powered by three phase network ABC, another group three-phase bridge rectification unit is powered by three-phase transformer secondary A1B1C1, three-phase transformer has 6 coils, former limit winding and secondary winding are connected into triangle and star respectively, or are connected into star and triangle respectively, and the apparent capacity of three-phase transformer is λ=0.5 with the ratio of rectifier power source power output.
4. N phase bridge-type power commutating power supply according to claim 1 is characterized in that the N value is 9.
5. N phase bridge-type power commutating power supply according to claim 4, it is characterized in that, the former limit of three-phase transformer is the three phase network ABC power supply of U by phase voltage value, two groups of three-phase bridge rectification unit are respectively by three-phase transformer two secondary A1B1C1 and A2B2C2 power supply in addition, three-phase transformer has 15 or 12 coils, former limit winding is connected into triangle or star, the phase voltage value of two groups of secondary outputs is U, phase place than the reach of the phase voltage of three phase network ABC or after move 40 °, the former limit apparent power of three-phase transformer is 2 (1-cos40 °)/3 with the ratio of rectifier power source power output.
6. N phase bridge-type power commutating power supply according to claim 5, it is characterized in that, three-phase transformer has 15 coils, former limit winding is connected into triangle, respectively serially add on the basis of three phase network ABC one by two phase voltages that series coil provided after, obtain three phase mains A0B0C0, the magnitude of voltage on two series coils all is
The phase voltage value of three phase mains A0B0C0 is Ucos40 °, and phase place is identical with the phase voltage of three phase network ABC; Serially add a coil respectively between three phase mains A0B0C0 and secondary A1B1C1 and secondary A2B2C2, this coil voltage is 40 ° of Usin, and phase place is identical with the opposite side of triangle ABC; The ratio of three-phase transformer apparent capacity and rectifier power source power output
7. N phase bridge-type power commutating power supply according to claim 5, it is characterized in that, three-phase transformer has 15 coils, former limit winding is connected into star, serially add a voltage that is provided by two series coils between three phase network ABC and secondary A1B1C1 and secondary A2B2C2, the magnitude of voltage of a coil is
The magnitude of voltage of another coil is
The ratio of three-phase transformer apparent capacity and rectifier power source power output
8. N phase bridge-type power commutating power supply according to claim 5 is characterized in that three-phase transformer has 12 coils, former limit winding is connected into star, respectively serially add a coil on the basis of three phase network ABC, this coil voltage is identical with electrical network phase voltage phase place, and magnitude of voltage is
Can obtain three phase mains A0B0C0, the phase voltage value of three phase mains A0B0C0 is
Phase place is identical with the phase voltage of ABC electrical network; String has phase voltage value to be between A0B0C0 and A1B1C1 and A2B2C2
Coil; The ratio of three-phase transformer apparent capacity and rectifier power source power output
9. N phase bridge-type power commutating power supply according to claim 1, it is characterized in that, on direct three inlets, go here and there an AC reactor respectively by that group three-phase bridge rectification unit of three phase network power supply, the specification of three AC reactor is identical, and reactance value equates with all the other transformer leakage reactance values of organizing on three-phase bridge rectification unit inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201120139654 CN202043048U (en) | 2011-05-05 | 2011-05-05 | N-phase bridge-type power rectified power source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120139654 CN202043048U (en) | 2011-05-05 | 2011-05-05 | N-phase bridge-type power rectified power source |
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| CN202043048U true CN202043048U (en) | 2011-11-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248243A (en) * | 2013-05-20 | 2013-08-14 | 镇江天力变压器有限公司 | High-frequent dual-splitting rectifying transformer |
| CN106797182A (en) * | 2014-08-29 | 2017-05-31 | 西门子公司 | Device for the railway power supply of rail track to be connected to three phase supply net |
| CN106953532A (en) * | 2017-04-24 | 2017-07-14 | 福州大学 | The improvement topology and its implementation of multiple-pulse AC/DC converters in a kind of HVDC and VFD systems |
-
2011
- 2011-05-05 CN CN 201120139654 patent/CN202043048U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248243A (en) * | 2013-05-20 | 2013-08-14 | 镇江天力变压器有限公司 | High-frequent dual-splitting rectifying transformer |
| CN106797182A (en) * | 2014-08-29 | 2017-05-31 | 西门子公司 | Device for the railway power supply of rail track to be connected to three phase supply net |
| CN106797182B (en) * | 2014-08-29 | 2019-11-22 | 西门子交通有限公司 | The device of three phase supply net is connected to for the railway power supply by rail track |
| CN106953532A (en) * | 2017-04-24 | 2017-07-14 | 福州大学 | The improvement topology and its implementation of multiple-pulse AC/DC converters in a kind of HVDC and VFD systems |
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Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD. Free format text: FORMER OWNER: BEIJING CHINA TEX MECHANICAL + ELECTRICAL ENGINEERING LTD. Effective date: 20150709 |
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Effective date of registration: 20150709 Address after: 101102 Beijing, Tongzhou District Sheng King South Street, No. 13, No. 101, 201-1, 301, 15, Patentee after: Nideke (Beijing) Transmission Technology Co. Ltd Address before: 101102, Beijing, Zhongguancun science and Technology Park, Jinqiao Science and technology industrial base, 15 South four street, 16A, Tongzhou District Patentee before: Beijing China Tex Mechanical & Electrical Engineering Ltd. |
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Granted publication date: 20111116 Termination date: 20180505 |
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