CN202340190U - Secondary resonance active clamping forward converter circuit - Google Patents
Secondary resonance active clamping forward converter circuit Download PDFInfo
- Publication number
- CN202340190U CN202340190U CN 201120487888 CN201120487888U CN202340190U CN 202340190 U CN202340190 U CN 202340190U CN 201120487888 CN201120487888 CN 201120487888 CN 201120487888 U CN201120487888 U CN 201120487888U CN 202340190 U CN202340190 U CN 202340190U
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- CN
- China
- Prior art keywords
- transformer
- electric capacity
- power supply
- active clamping
- resonance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a secondary resonance active clamping forward converter circuit, which comprises a power supply, an adjusting circuit, a transformer and an output unit, wherein a primary side of the transformer is connected in series to the two ends of the power supply; the adjusting circuit is positioned between the power supply and the transformer; the output unit is arranged on a secondary side of the transformer and comprises a magnetic switch, a filter inductor, an output filter capacitor and a flywheel diode; the magnetic switch consists of a resonance saturation inductor and a rectifier diode which are connected in series; and one end of the resonance saturation inductor is connected with the secondary side of the transformer. According to the secondary resonance active clamping forward converter circuit, the technical problems of incapability of adjusting duty cycle and incapability of adjusting output voltage existing in the conventional active clamping technology are solved; the secondary resonance active clamping forward converter circuit is a topological structure of a novel active clamping forward converter; and the duty cycle can be effectively adjusted by adjusting switching frequency, so that the output voltage can be adjusted.
Description
Technical field
The utility model relates to a kind of secondary resonance Active Clamped Forward Converters circuit.
Background technology
Continuous development along with power electronic technology; The active clamp technology is used in other various topological structures gradually; The active clamp technology not only can be with master power switch tube voltage clamper in certain level; The no-voltage that can also realize master power switch pipe and auxiliary switch is open-minded, thereby the loss of power of greatly reducing makes Switching Power Supply high power density, high efficiency and small size become possibility.But traditional active clamper forward converter can not be realized the adjusting of effective duty ratio, can't regulate output voltage.
Summary of the invention
Can not regulate duty ratio in order to solve existing active clamp technology; Can't regulate the technical problem of output voltage; The utility model provides a kind of secondary resonance Active Clamped Forward Converters circuit; It is a kind of topological structure of novel Active Clamped Forward Converters, can realize the adjusting of effective duty ratio through the by-pass cock frequency, thereby can regulate output voltage.
The technical solution of the utility model is:
The secondary resonance Active Clamped Forward Converters; Its special character is: comprise power supply, regulating circuit, transformer and output unit; The former limit of said transformer is serially connected in the two ends of power supply; Said regulating circuit is between power supply and transformer, and said output unit is arranged on the inferior limit of transformer, and said output unit comprises magnetic switch, filter inductance L
o, output filter capacitor C
OWith sustained diode 2, wherein, the inferior limit of transformer, magnetic switch, filter inductance L
o, output filter capacitor C
OConnect and compose major loop successively, said sustained diode 2 with connect after filter inductance L
oWith output filter capacitor C
OParallel connection,
Its special character is: said magnetic switch is the resonance pulsactor L of series connection
rWith rectifier diode D1, said resonance pulsactor L
rAn end link to each other with the inferior limit of transformer.
Above-mentioned regulating circuit comprises clamping switch tube S1, main switch S2, magnetizing inductance Lm, clamp capacitor Cc, first capacitor C 1 and second capacitor C 2, and S1 is connected between transformer former limit low side and the power cathode; Said magnetizing inductance Lm is connected on the two ends on the former limit of transformer; Second capacitor C 2 is parallelly connected with first capacitor C 1 again after connecting with clamp capacitor Cc, and first capacitor C 1 is parallelly connected with clamping switch tube S1, and main switch S2 is parallelly connected with second capacitor C 2.
The advantage that the utility model had:
The utility model secondary resonance Active Clamped Forward Converters; The introducing of resonance pulsactor; Make the main switch of secondary resonance Active Clamped Forward Converters when soft opening, no longer receive the influence of output current, obviously be superior to traditional Active Clamped Forward Converters aspect soft the opening; The maximum exciting current of secondary resonance Active Clamped Forward Converters is greater than the maximum exciting current of traditional Active Clamped Forward Converters; The secondary resonance Active Clamped Forward Converters can realize the adjusting of effective duty ratio through regulating the magnetic switch frequency, thereby can regulate output voltage.This circuit just is being implemented on certain type power module, and has obtained certain economic benefits.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Wherein Reference numeral is: L
o-filter inductance, D1-rectifier diode, D2-fly-wheel diode, C
O-output filter capacitor, S1-clamping switch tube, S2-main switch, C1-first electric capacity, C2-second electric capacity, Lm-magnetizing inductance, Cc-clamp capacitor, L
r-resonance pulsactor.
Embodiment
The secondary resonance Active Clamped Forward Converters has been introduced resonance pulsactor L
r, soft switch aspect obviously is superior to traditional Active Clamped Forward Converters; Maximum exciting current is greater than the maximum exciting current of traditional Active Clamped Forward Converters.And realize the adjusting of effective duty ratio, thereby regulate output voltage through the by-pass cock frequency.
Function is at main switch S2 blocking interval, and on regulation numerical value level, it remains unchanged clamp capacitor Cc basically with main switch S1 voltage Vc1 pincers, thereby has avoided S1 to go up excessive voltage stress.Pulsactor L
rWith rectifier diode D1 series connection, its effect is equivalent to a magnetic switch, exciting current hour, inductance is very big, stops exciting current to flow to inferior limit of transformer T1, guarantees that the main switch voltage resonance is to zero.Thereby the realization no-voltage is opened, is turn-offed, and reaches the soft switch technique requirement.Active Clamped Forward Converters is introduced L
rAfter, can the by-pass cock frequency realize the adjusting of effective duty ratio, thereby can regulate output voltage.The relation of switching frequency, duty ratio and output voltage is seen formula (1), (2).Its D is a duty ratio, and N is the transformer turn ratio, T
DThe Best Times that turn-offs between the S1 conducting for S2 postpones T
sBe the work period, f
sBe switching frequency, V
oBe output voltage, V
InBe input voltage.
L
oFor filter inductance, D2 are fly-wheel diode, C
OFor output filter capacitor, S2 clamping switch tube, C1, C2 are that drain electrode and the electric capacity between the source electrode, the Lm of switching tube S1, S2 is magnetizing inductance.
Claims (2)
1. secondary resonance Active Clamped Forward Converters circuit; Comprise power supply, regulating circuit, transformer and output unit; The former limit of said transformer is serially connected in the two ends of power supply; Said regulating circuit is between power supply and transformer, and said output unit is arranged on the inferior limit of transformer, and said output unit comprises magnetic switch, filter inductance (L
o), output filter capacitor (C
O) and fly-wheel diode (D2), wherein, the inferior limit of transformer, magnetic switch, filter inductance (L
o), output filter capacitor (C
O) connect and compose major loop successively, said fly-wheel diode (D2) with connect after filter inductance (L
o) and output filter capacitor (C
O) parallel connection,
It is characterized in that: said magnetic switch is the resonance pulsactor (L of series connection
r) and rectifier diode (D1), said resonance pulsactor (L
r) an end link to each other with the inferior limit of transformer.
2. secondary resonance Active Clamped Forward Converters circuit according to claim 1; It is characterized in that: said regulating circuit comprises clamping switch tube (S1), main switch (S2), magnetizing inductance (Lm), clamp capacitor (Cc), first electric capacity (C1) and second electric capacity (C2), and clamping switch tube (S1) is connected between transformer former limit low side and the power cathode; Said magnetizing inductance (Lm) is connected on the two ends on the former limit of transformer; Parallelly connected with first electric capacity (C1) again after second electric capacity (C2) and clamp capacitor (Cc) series connection, first electric capacity (C1) is parallelly connected with clamping switch tube (S1), and main switch (S2) is parallelly connected with second electric capacity (C2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120487888 CN202340190U (en) | 2011-11-30 | 2011-11-30 | Secondary resonance active clamping forward converter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120487888 CN202340190U (en) | 2011-11-30 | 2011-11-30 | Secondary resonance active clamping forward converter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202340190U true CN202340190U (en) | 2012-07-18 |
Family
ID=46488877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120487888 Expired - Lifetime CN202340190U (en) | 2011-11-30 | 2011-11-30 | Secondary resonance active clamping forward converter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202340190U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874695A (en) * | 2014-01-10 | 2016-08-17 | 株式会社村田制作所 | High-voltage power supply device |
| CN106059375A (en) * | 2016-05-20 | 2016-10-26 | 周东旭 | System and method for controlling corona intensity in corona discharge igniting system |
| CN109155591A (en) * | 2017-04-28 | 2019-01-04 | 雅达电子国际有限公司 | Flyback power converter including the adaptive clamp circuit for adjusting resonance frequency |
-
2011
- 2011-11-30 CN CN 201120487888 patent/CN202340190U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874695A (en) * | 2014-01-10 | 2016-08-17 | 株式会社村田制作所 | High-voltage power supply device |
| CN105874695B (en) * | 2014-01-10 | 2018-11-20 | 株式会社村田制作所 | High-voltage power apparatus |
| CN106059375A (en) * | 2016-05-20 | 2016-10-26 | 周东旭 | System and method for controlling corona intensity in corona discharge igniting system |
| CN109155591A (en) * | 2017-04-28 | 2019-01-04 | 雅达电子国际有限公司 | Flyback power converter including the adaptive clamp circuit for adjusting resonance frequency |
| CN109155591B (en) * | 2017-04-28 | 2023-04-14 | 雅达电子国际有限公司 | Flyback power converter including adaptive clamp circuit for adjusting resonant frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120718 |