CN203775062U - Non-controlling APFC single-stage AC-DC topological structure - Google Patents
Non-controlling APFC single-stage AC-DC topological structure Download PDFInfo
- Publication number
- CN203775062U CN203775062U CN201320861492.4U CN201320861492U CN203775062U CN 203775062 U CN203775062 U CN 203775062U CN 201320861492 U CN201320861492 U CN 201320861492U CN 203775062 U CN203775062 U CN 203775062U
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- apfc
- bidirectional switch
- stage
- high frequency
- topological structure
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Abstract
The utility model discloses a non-controlling APFC single-stage AC-DC topological structure, including an alternating current power supply, a first high frequency ballast inductor, a first capacitor, a two-way switch, a high frequency transformer and a rectifying and filtering circuit. The first capacitor is connected with a primary side of the high frequency transformer in series, and after series connection, the first capacitor and the high frequency transformer, as a whole, are connected with the two-way switch in parallel, one end of the two-way switch is connected with a first end of the alternating current power supply through the first high frequency ballast inductor, the other end of the two-way switch is connected with a second end of the alternating current power supply, and a secondary side of the high frequency transformer is connected with the rectifying and filtering circuit. The non-controlling APFC single-stage AC-DC topological structure realizes non-controlling of an APFC circuit, and achieves an AC-DC function by a single stage.
Description
Technical field
The utility model belongs to AC-DC power conversion technical field, particularly a kind of APFC single-stage AC-DC topological structure of not controlling.
Background technology
Along with the requirement of various standards, standard, in AC-DC conversion field, require to improve power factor (PF), reduce harmonic current.A lot of APFC circuit have been developed as the prime of AC-DC converter, to guarantee to meet the requirement of various standards, standard for this reason.
But no matter which kind of APFC circuit, all must carry out strict control, to prevent that PFC is deteriorated, late-class circuit fault, for example, common BOOST circuit, if do not add control, or late-class circuit voltage is unlimited to raise until aircraft bombing, or PFC does not reach standard-required.
And the fault of PFC control circuit will cause the damage of power switch component, the probability that also has larger electromagnetic interference emission and harassed, needs intense adjustment to meet design requirement simultaneously.
Common BOOST circuit, must guarantee that the voltage of rear class DC-DC is higher than the peak value of input voltage, causes the requirement of withstand voltage of switch element to improve.
And one-level APFC adds the more components and parts of one-level DC-DC needs separately, affects efficiency, cost.
Utility model content
The problem existing in order to solve above-mentioned background technology, the utility model aims to provide a kind of APFC single-stage AC-DC topological structure of not controlling, and realizes not controlling of APFC circuit, and single-stage completes AC-DC function.
In order to realize above-mentioned technical purpose, the technical solution adopted in the utility model is:
Do not control an APFC single-stage AC-DC topological structure, comprise AC power, the first high-frequency ballast inductance, the first electric capacity, bidirectional switch, high frequency transformer and current rectifying and wave filtering circuit, AC power comprises first end and the second end; The first electric capacity is connected with the former limit of high frequency transformer, after both series connection, do as a whole in parallel with bidirectional switch, one end first high-frequency ballast inductance of bidirectional switch is connected with the first end of AC power, the other end of bidirectional switch connects the second end of AC power, and the secondary of high frequency transformer connects current rectifying and wave filtering circuit.
Wherein, above-mentioned bidirectional switch replaces with two metal-oxide-semiconductors that connect back-to-back.
Wherein, above-mentioned bidirectional switch replaces by two IGBT pipe belts that connect back-to-back.
Wherein, above-mentioned bidirectional switch replaces with two triodes that connect back-to-back.
Wherein, between the second end of above-mentioned bidirectional switch and AC power, be connected in series the second high-frequency ballast inductance, between the one end not being connected with the first electric capacity on the former limit of high frequency transformer and bidirectional switch, be connected in series the second electric capacity.
The beneficial effect that adopts technique scheme to bring is:
(1) the utility model circuit forms high-frequency ballast switching power circuit by components and parts such as inductance, electric capacity, bidirectional switch, high frequency transformers, do not need APFC circuit to control, and single-stage completes AC-DC function;
(2) the utility model does not adopt common BOOST inductance, but adopt high-frequency ballast inductance, characteristic due to high-frequency ballast inductance, circuit topology of the present utility model can obtain higher PFC value, but do not need to carry out input voltage sampling and input current sampling completely as the APFC circuit such as BOOST, circuit structure is simplified;
(3) the former limit due to the utility model circuit is not connected on semiconductor element and the resistance element in loop of power circuit, and the efficiency in loop is higher.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of preferred embodiment of the present utility model.
Main symbol description in accompanying drawing: L1: the first high-frequency ballast inductance; L2: the second high-frequency ballast inductance; C1: the first electric capacity; C2: the second electric capacity; K1: bidirectional switch; T1: high frequency transformer; AC: AC power.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is elaborated.
The technical solution of the utility model is: a kind of APFC single-stage AC-DC topological structure of not controlling is provided, comprise AC power, the first high-frequency ballast inductance, the first electric capacity, bidirectional switch, high frequency transformer and current rectifying and wave filtering circuit, AC power comprises first end and the second end; The first electric capacity is connected with the former limit of high frequency transformer, after both series connection, do as a whole in parallel with bidirectional switch, one end first high-frequency ballast inductance of bidirectional switch is connected with the first end of AC power, the other end of bidirectional switch connects the second end of AC power, and the secondary of high frequency transformer connects current rectifying and wave filtering circuit.
The circuit diagram of preferred embodiment of the present utility model as shown in Figure 1, comprises AC power AC, the first high-frequency ballast inductance L 1, the second high-frequency ballast inductance L 2, the first capacitor C 1, the second capacitor C 2, bidirectional switch K1, high frequency transformer T1, current rectifying and wave filtering circuit and load; The first capacitor C 1, high frequency transformer T1 and the second capacitor C 2 are connected successively, do as a whole in parallel with bidirectional switch K1 after three's series connection.One end the first high-frequency ballast inductance L 1 of bidirectional switch K1 is connected with the first end of AC power AC, and bidirectional switch be K1's and the other end is connected with the second end of AC power AC through the second high-frequency ballast inductance L 2.The secondary of high frequency transformer T1 is connected with load through current rectifying and wave filtering circuit.
What the present embodiment was selected is bidirectional switch, and the utility model can replace with two metal-oxide-semiconductors that connect back-to-back or two IGBT pipes that connect back-to-back or two triodes that connect back-to-back the bidirectional switch of the present embodiment.
Above embodiment is only explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every technological thought according to the utility model proposes, any change of doing on technical scheme basis, within all falling into the utility model protection range.
Claims (5)
1. do not control an APFC single-stage AC-DC topological structure, it is characterized in that: comprise AC power, the first high-frequency ballast inductance, the first electric capacity, bidirectional switch, high frequency transformer and current rectifying and wave filtering circuit, AC power comprises first end and the second end; The first electric capacity is connected with the former limit of high frequency transformer, after both series connection, do as a whole in parallel with bidirectional switch, one end first high-frequency ballast inductance of bidirectional switch is connected with the first end of AC power, the other end of bidirectional switch connects the second end of AC power, and the secondary of high frequency transformer connects current rectifying and wave filtering circuit.
2. a kind of APFC single-stage AC-DC topological structure of not controlling according to claim 1, is characterized in that: described bidirectional switch replaces with two metal-oxide-semiconductors that connect back-to-back.
3. a kind of APFC single-stage AC-DC topological structure of not controlling according to claim 1, is characterized in that: described bidirectional switch replaces by two IGBT pipe belts that connect back-to-back.
4. a kind of APFC single-stage AC-DC topological structure of not controlling according to claim 1, is characterized in that: described bidirectional switch replaces with two triodes that connect back-to-back.
5. according to a kind of APFC single-stage AC-DC topological structure of not controlling described in any one in claim 1 to 4, it is characterized in that: between the second end of described bidirectional switch and AC power, be connected in series the second high-frequency ballast inductance, between the one end not being connected with the first electric capacity on the former limit of high frequency transformer and bidirectional switch, be connected in series the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861492.4U CN203775062U (en) | 2013-12-25 | 2013-12-25 | Non-controlling APFC single-stage AC-DC topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861492.4U CN203775062U (en) | 2013-12-25 | 2013-12-25 | Non-controlling APFC single-stage AC-DC topological structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775062U true CN203775062U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320861492.4U Expired - Fee Related CN203775062U (en) | 2013-12-25 | 2013-12-25 | Non-controlling APFC single-stage AC-DC topological structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN203775062U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731052A (en) * | 2013-12-25 | 2014-04-16 | 江苏嘉钰新能源技术有限公司 | Non-control APFC single-stage AC-DC topological structure |
-
2013
- 2013-12-25 CN CN201320861492.4U patent/CN203775062U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731052A (en) * | 2013-12-25 | 2014-04-16 | 江苏嘉钰新能源技术有限公司 | Non-control APFC single-stage AC-DC topological structure |
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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: 20140813 Termination date: 20181225 |