CN202565184U - DC 12-phase rectification power supply device - Google Patents
DC 12-phase rectification power supply device Download PDFInfo
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- CN202565184U CN202565184U CN2012201914694U CN201220191469U CN202565184U CN 202565184 U CN202565184 U CN 202565184U CN 2012201914694 U CN2012201914694 U CN 2012201914694U CN 201220191469 U CN201220191469 U CN 201220191469U CN 202565184 U CN202565184 U CN 202565184U
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Abstract
Disclosed is a DC 12-phase rectification power supply device, comprising two transformers having equal power and consistent output line voltage, wherein both the primary winding and secondary winding of one transformer adopt the star connection; the primary winding of the other transformer adopts the star connection, with the secondary winding of the transformer adopting the delta connection; the output windings of the two transformers are respectively connected with a set of three-phase full bridge and respectively form a set of power supply output; the outputs of the two sets of the power supply operate in parallel; the output terminals of the two sets of power supply are parallelly connected; and a balance reactor is connected to the parallel-connecting section of the parallelly connected output terminals. The DC 12-phase rectification power supply device features simple structure and convenient and reliable usage, and is capable of obtaining 12-phase rectification power supply.
Description
Technical field
The utility model relates to a kind of direct current 12-phase rectification power-supply device; The detection that mainly is applicable to the DC characteristic of dc low-voltage electric equipment products is used; Comprise temperature rise to the dc low-voltage electric equipment products, long delay, short time delay and attribute testing such as instantaneous, belong to low-voltage electrical apparatus detection technique field.
Technical background
Dc rectification power is exactly to change AC power into DC power supply through rectifier, but because its ripple factor value of dc rectification power is greater than pure direct current, thereby the quality of its power supply will be worse than pure direct current.
The number of phases of dc rectification power is different, and its ripple factor value also has nothing in common with each other.See the following form:
| The number of |
2 | 3 | 6 | 12 | ∞ |
| Ripple factor value % | 48.2 | 18.27 | 4.18 | 0.994 | 0 |
The size of ripple factor value is directly connected to the quality of DC power supply.The number of phases is big more, and power quality is good more.In order to improve the quality of dc rectification power, must increase the number of phases of dc rectification power, reduce the ripple factor value with this.
Existing rectifier power source equipment; General rectification source of adopting three phase full bridge (belonging to 6 arteries and veins rectifications); Though reached the requirement of ripple factor＜5% of standard code; But owing to reason such as three-phase voltage is not necessarily in full accord, its ripple factor still is not ideal enough, particularly for the dc low-voltage electrical apparatus test of having relatively high expectations.Therefore, need to improve the quality of rectifier power source through increasing the number of phases of dc rectification power.
Can be learnt that by last table the ripple coefficient of 12 commutating phases has only 0.994, being applied in it in the low-voltage electrical test is more satisfactory selection.
Summary of the invention
The purpose of the utility model is to overcome the deficiency that prior art exists, and provides a kind of simple in structure, and is easy to use, reliable, can obtain the direct current 12-phase rectification power-supply device of 12-phase rectification power supply.
The purpose of the utility model is accomplished through following technical scheme; It is equal by two power, the consistent transformer of output line voltage constitutes, and wherein the elementary winding and the secondary winding of a transformer are star connection, and secondary winding is a star connection; The elementary winding of another transformer is a star connection; And secondary winding is a delta connection, and the output winding of two transformers is connected to one group of three phase full bridge respectively and respectively constitutes one group of power supply output, two groups of power supply output-parallel operations.
Add in the joint after described two groups of power output end parallel connections and be connected to an interphase reactor.
The utlity model has simple in structure; Easy to use, reliable; Can obtain characteristics such as 12-phase rectification power supply, be applicable to that mainly the detection of the DC characteristic of dc low-voltage electric equipment products is used, comprise temperature rise to the dc low-voltage electric equipment products, long delay, short time delay and attribute testing such as instantaneous.
Description of drawings
Fig. 1 is the structural principle sketch map of the utility model.
Embodiment
To combine accompanying drawing that the utility model is done detailed introduction below: shown in Figure 1; The utility model is mainly equal by two power, the consistent transformer 1,2 of output line voltage constitutes; Wherein the elementary winding and the secondary winding of a transformer 1 are star connection; Secondary winding is a star connection, and the elementary winding of another transformer 2 is a star connection, and secondary winding is a delta connection; The output winding of two transformers 1,2 is connected to one group of three phase full bridge 3,4 respectively and respectively constitutes one group of power supply output, two groups of power supply output-parallel operations.
Add in the joint after described two groups of power output end parallel connections and be connected to an interphase reactor 5.
Embodiment:
The transformer that the utility model is mainly equated by two power, elementary winding all is a star connection around to connecing the method unanimity.Star connection of secondary winding, a delta connection, the output line voltage of two transformers must be consistent.The output winding (output line voltage equates) of two transformers is connect two groups of three phase full bridges respectively, because the line voltage of output equates that their rectification average voltage also equates, when under the identical situation of polarity, does parallel running.At this moment the phase difference of two groups of rectifier bridge extraction voltages is 30 °, thereby has obtained the rectifier power source of ten two-phases.But, therefore between two groups of power supplys, can produce circulation because the instantaneous value of two groups of bridge commutating voltages does not wait.In order to limit circulation, special output adjunction one interphase reactor at two groups of power supplys.
Claims (2)
1. direct current 12-phase rectification power-supply device; It is equal by two power, the consistent transformer of output line voltage constitutes, and it is characterized in that wherein the elementary winding and the secondary winding of a transformer are star connection, and secondary winding is a star connection; The elementary winding of another transformer is a star connection; And secondary winding is a delta connection, and the output winding of two transformers is connected to one group of three phase full bridge respectively and respectively constitutes one group of power supply output, two groups of power supply output-parallel operations.
2. direct current 12-phase rectification power-supply device according to claim 1 is characterized in that after described two groups of power output end parallel connections adding in the joint and is connected to an interphase reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201914694U CN202565184U (en) | 2012-05-02 | 2012-05-02 | DC 12-phase rectification power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201914694U CN202565184U (en) | 2012-05-02 | 2012-05-02 | DC 12-phase rectification power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202565184U true CN202565184U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201914694U Expired - Fee Related CN202565184U (en) | 2012-05-02 | 2012-05-02 | DC 12-phase rectification power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202565184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401302A (en) * | 2013-08-19 | 2013-11-20 | 南车株洲电力机车有限公司 | Vehicle ground charging system |
-
2012
- 2012-05-02 CN CN2012201914694U patent/CN202565184U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401302A (en) * | 2013-08-19 | 2013-11-20 | 南车株洲电力机车有限公司 | Vehicle ground charging system |
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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 |
Granted publication date: 20121128 Termination date: 20160502 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |