CN101707126A - Power supply circuit for active electronic transformer - Google Patents
Power supply circuit for active electronic transformer Download PDFInfo
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- CN101707126A CN101707126A CN200910172782A CN200910172782A CN101707126A CN 101707126 A CN101707126 A CN 101707126A CN 200910172782 A CN200910172782 A CN 200910172782A CN 200910172782 A CN200910172782 A CN 200910172782A CN 101707126 A CN101707126 A CN 101707126A
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- circuit
- power supply
- active electronic
- current
- supply circuit
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Abstract
The invention relates to a power supply circuit for an active electronic transformer, which comprises a current transformer of which the output end is orderly connected with a rectifying circuit, a filter circuit and a voltage stabilizing circuit; and an attenuator circuit is arranged between the output end of the current transformer and the rectifying circuit; therefore, the current input upper limit of normal power supply of the power supply circuit is improved, and the power supply circuit can work normally under high working voltage.
Description
Technical field
The present invention relates to current supply circuit in the circuit power taking supply power mode of a kind of active electronic current transformer high-pressure side circuit board.
Background technology
Active type electronic current mutual inductor high-side signal processing section does not have the ability of self-energy supply, need install power supply in addition additional.Have at present by small current mutual inductor mode of power taking from circuit to provide power supply for the high-side signal processing.Yet the charging voltage that this way to take power obtains is vulnerable to the influence of line current size, so the power supply circuits under this mode have the electric current of waking up and two important parameters of maximum current.Waking electric current up is the initial minimum current of power supply work, and the maximum current of maximum current confession under directions electricity circuit working.Because the supply power voltage of power supply circuits can not be excessive or too small, thereby limited the size of waking electric current and maximum current up, promptly limited the operating current threshold value of active type electronic current mutual inductor.
Summary of the invention
The purpose of this invention is to provide a kind of power supply circuit for active electronic transformer, to improve the electric current input upper limit of power supply circuits normal power supply, make this current supply circuit can be under higher operating voltage operate as normal.
For achieving the above object, the technical scheme that adopts is: a kind of power supply circuit for active electronic transformer, comprise current transformer, the output of current transformer is connected with rectification circuit, filter circuit and voltage stabilizing circuit in turn, is provided with attenuator circuit between the output of current transformer and rectification circuit; Described attenuator circuit can adopt attenuator to realize high-tension decay according to different demands, also can be with attenuator circuit and other interlock circuit comprehensive Design.
Described attenuator circuit is the nonlinear attenuation circuit.
The attenuation of described attenuator circuit is adjustable.
Be provided with feedback circuit in these power supply circuits, the input of this circuit and output are connected to filter circuit output and attenuator circuit control end.
Described feedback circuit has the nonlinear feedback module.
The present invention is provided with attenuator circuit between the output of current transformer and rectification circuit, improved the electric current input upper limit of power supply circuits normal power supplies, make this current supply circuit can be under higher operating voltage operate as normal; The attenuation of attenuator circuit is adjustable, the electric current input lower limit of power supply circuits normal power supply, the electric current input interval of increase power supply circuits normal power supply; The output of filter circuit is connected in above-mentioned nonlinear attenuation circuit control end through feedback circuit, has realized the automatic adjustment of attenuation in the power supply circuits.
Description of drawings
Fig. 1 is existing power supply circuit for active electronic transformer block diagram;
Fig. 2 is a power supply circuit for active electronic transformer block diagram of the present invention.
Embodiment
As shown in Figure 1, existing power supply circuit for active electronic transformer comprises current transformer, the output end voltage U of current transformer
WBe connected with rectification circuit ZL, filter circuit LB and voltage stabilizing circuit WY in turn, the operating voltage V of output active type electronic current mutual inductor
OI wherein
PBe the electric current in the high-tension line, arrow is represented sense of current.
As shown in Figure 2, the power supply circuit for active electronic transformer of present embodiment is provided with nonlinear attenuation circuit SJ between the output of current transformer and rectification circuit ZL, the attenuation of this attenuator circuit SJ is adjustable, and the output of filter circuit LB is connected in the control end of above-mentioned nonlinear attenuation circuit SJ through nonlinear feedback module FK.
The output end voltage U of current transformer
WThrough nonlinear attenuation circuit SJ, voltage after the output attenuatoin, this is exported successively through rectification circuit ZL, filter circuit LB and voltage stabilizing circuit WY, obtains the operating voltage V of active type electronic current mutual inductor
O, after the output of filter circuit LB was carried out signals collecting by nonlinear feedback module FK, output feedback signal was adjusted attenuation to the control end of nonlinear attenuation circuit SJ automatically according to feedback signal.
Adopt nonlinear attenuation circuit SJ to realize the decay of current supply circuit input voltage in the present embodiment, can certainly adopt existing attenuator, this type of replacement belongs to equal replacement.
In the present embodiment in the attenuator circuit attenuation adjust according to the signal of feedback circuit collection, can certainly adopt additive method, as between the input of attenuator circuit and control end, connecting the adjustment that a positive current feed circuit is realized attenuation in the attenuator circuit.
Claims (5)
1. power supply circuit for active electronic transformer, comprise current transformer, the output of current transformer is connected with rectification circuit, filter circuit and voltage stabilizing circuit in turn, it is characterized in that, is provided with attenuator circuit between the output of current transformer and rectification circuit.
2. power supply circuit for active electronic transformer as claimed in claim 1 is characterized in that, described attenuator circuit is the nonlinear attenuation circuit.
3. power supply circuit for active electronic transformer as claimed in claim 1 or 2 is characterized in that the attenuation of described attenuator circuit is adjustable.
4. power supply circuit for active electronic transformer as claimed in claim 3 is characterized in that, is provided with feedback circuit in these power supply circuits, and the input of this circuit and output are connected to filter circuit output and attenuator circuit control end.
5. power supply circuit for active electronic transformer as claimed in claim 4 is characterized in that described feedback circuit has the nonlinear feedback module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172782A CN101707126A (en) | 2009-11-27 | 2009-11-27 | Power supply circuit for active electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172782A CN101707126A (en) | 2009-11-27 | 2009-11-27 | Power supply circuit for active electronic transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707126A true CN101707126A (en) | 2010-05-12 |
Family
ID=42377341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910172782A Pending CN101707126A (en) | 2009-11-27 | 2009-11-27 | Power supply circuit for active electronic transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101707126A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012156812A1 (en) * | 2011-05-17 | 2012-11-22 | Eaton Corporation | Parasitic power supply and sensor apparatus including a power supply |
| CN104865437A (en) * | 2015-05-29 | 2015-08-26 | 天津市凯源新能电气有限公司 | Electronic current transformer with highly precise transformation ratio |
-
2009
- 2009-11-27 CN CN200910172782A patent/CN101707126A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012156812A1 (en) * | 2011-05-17 | 2012-11-22 | Eaton Corporation | Parasitic power supply and sensor apparatus including a power supply |
| CN104865437A (en) * | 2015-05-29 | 2015-08-26 | 天津市凯源新能电气有限公司 | Electronic current transformer with highly precise transformation ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100512 |
|
| RJ01 | Rejection of invention patent application after publication |