CN102386777A - Direct current electron voltage-dividing voltage regulator for sharing voltage by utilizing intermediate frequency transformer - Google Patents
Direct current electron voltage-dividing voltage regulator for sharing voltage by utilizing intermediate frequency transformer Download PDFInfo
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- CN102386777A CN102386777A CN2011102062545A CN201110206254A CN102386777A CN 102386777 A CN102386777 A CN 102386777A CN 2011102062545 A CN2011102062545 A CN 2011102062545A CN 201110206254 A CN201110206254 A CN 201110206254A CN 102386777 A CN102386777 A CN 102386777A
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Abstract
The invention relates to power electronic science in electrochemical engineering and aims at providing a direct current electron voltage-dividing voltage regulator used for sharing a voltage by utilizing an intermediate frequency transformer. The voltage-dividing voltage regulator comprises n voltage dividers which are same in structure, each voltage divider is provided with two electrolytic capacitors which are connected into a group in series, and the positive terminal and negative terminal of each voltage divider are respectively connected with a chopper switch. The output of the voltage divider is respectively connected with the input end of an inverter, and the structures of the inverters in different stages are the same; the output end of each inverter is connected to a coil of the intermediate frequency transformer, the middle point of the coil is connected to that of a double-electrolytic capacitor, and the coils connected with the output ends of the inverters in different stages are all wound onto the same iron core. By applying the direct current electron voltage-dividing voltage regulator provided by the invention, a higher direct current voltage can be divided into multiple lower adjustable direct current voltages uniformly or in specified proportion. The voltage divider has higher efficiency, thus being applicable to high-power occasions. Direct-current output currents can be nonuniform in certain degree, and the alternating current of low frequency or high frequency component can be contained in certain limit.
Description
Technical field
The invention belongs to electrician's class power electronics, be specifically related to a kind of DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press.
Background technology
The number of winning the confidence at present with dc partial voltage adopt electric resistance partial pressure mostly, be about to two or more resistance string and be connected on the direct voltage, potentiometer dividing potential drop perhaps commonly used.Assign to a part of voltage on each or every section resistance, form voltage divider.This voltage divider efficient is low, be applicable to the number of winning the confidence with or small-power usefulness, be not suitable for powerful occasion.Another kind is applicable to that powerful way is that direct current is at first become interchange, becomes some groups of interchanges with transformer again, is rectified into some groups of direct currents then.This way complex equipments, cost height.
Summary of the invention
The problem that the present invention will solve is, overcomes deficiency of the prior art, and a kind of DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press is provided.
Be the technical solution problem, solution of the present invention is:
A kind of DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press is provided, comprises the identical voltage divider of n group structure, n is >=1 integer; Every component depressor has: two electrolytic capacitors that are connected into a group; Become one group of two electrolytic capacitor; The positive and negative end of every group of two electrolytic capacitors is connected to a chopper switches; The output termination of two chopper switches the fly-wheel diode of two series connection, the mid point of series connection fly-wheel diode combination is received the mid point of two electrolytic capacitors; Described n component depressor input is connected and synchronous break-make each other, and the output of every component depressor links to each other with the input of an inverter respectively, and inverter structures at different levels are all identical; The output of inverter is received one group of coil of intermediate frequency transformer, and the mid point of this group coil is received the mid point of two electrolytic capacitors, and the coil that inverter output end at different levels connect is all on same iron core;
Wherein, each grade inverter is single-phase full bridge, and each brachium pontis is made up of thyristor and anti-and diode, each thyristor diode of having connected again wherein, and the purpose of series diode is the dV/dt of minimizing thyristor.Between every pair of upper and lower brachium pontis of each single-phase full bridge, be connected in series the secondary winding W of a converter transformer.The direction of the change of current is to change to the diode of another brachium pontis from the thyristor of a brachium pontis of every pair of upper and lower brachium pontis, and the direction of the change of current voltage that converter transformer produced need help such change of current.
As a kind of improvement, in described each component depressor, have 0～(n-1) group fully not output DC flow to external circuit and only output to transformer coil, all the other n～1 component depressor outputs to external circuit with electric current.
As a kind of improvement, allow the direct voltage of each component depressor input unequal, this moment, the direct voltage of each component depressor output was also unequal, and intermediate frequency transformer coil turn at different levels is unequal too.
As a kind of improvement, the chopper switches of n component depressor is synchronous break-make, and two chopper switches in a group also are break-makes simultaneously.
The present invention also provides a kind of DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press, and comprises the identical voltage divider of n group structure, and n is >=1 integer; It is characterized in that every component depressor has an electrolytic capacitor, the one of which termination has a chopper switches, the identical and synchronous break-make of each chopper structure; Connect a fly-wheel diode between the other end of this electrolytic capacitor and the other end of chopper switches; The output of every component depressor links to each other with the input of an inverter respectively, and inverter structures at different levels are all identical; The output of inverter is received one group of coil of intermediate frequency transformer, and the coil that inverter output end at different levels connect is all on same iron core;
Wherein, Each grade inverter is single-phase full bridge; Each brachium pontis is made up of thyristor and anti-and diode, and each thyristor diode of having connected again wherein has been connected in series the secondary winding W of a converter transformer between every pair of upper and lower brachium pontis of each single-phase full bridge; The direction of the change of current is to change to the diode of another brachium pontis from the thyristor of a brachium pontis, and the direction of the change of current voltage that converter transformer produced need help such change of current.
Beneficial effect of the present invention is:
The present invention can realize a higher direct voltage is divided into equably or to scale several groups lower direct voltage that can regulate.This voltage divider has higher efficient, so applicable to large-power occasions.And the electric current that allows respectively to organize direct current output has to a certain degree inhomogeneous, also allows to contain the low frequency of certain limit or the interchange of high fdrequency component.
Description of drawings
Fig. 1 is the circuit theory diagrams of the specific embodiment of the invention 1.
Fig. 2 is the circuit theory diagrams of the specific embodiment of the invention 2.
Embodiment
When usual n chopper connected, it can solve dividing potential drop and pressure regulation problem, but it does not have equal pressure energy power.The electric current of bearing when each dividing potential drop section has the voltage of each dividing potential drop section when inhomogeneous can be more and more inhomogeneous slightly, until till the electric current that forces each dividing potential drop section to bear equates.Therefore it is inapplicable often.
Specific embodiment 1:
The circuit diagram of this specific embodiment is as shown in Figure 1.Inverter is pressed the work of intermediate frequency square wave.Every group of diagonal brachium pontis takes turns to operate 180 °.When the needs change of current, for example to change to left following, upper right diagonal brachium pontis from upper left, diagonal line brachium pontis, the commutation course of inverter is following: at first turn-off the chopper switches IGBT in this voltage divider, the output dc voltage ud instantaneous value that makes it is zero.Add change of current potential pulse Δ U (u simultaneously
Wa1), each change of current voltage positive pulse is the ripple of about 100 μ s of demarcation turn-off time of amplitude ≈+5～10v (being as the criterion to reach change of current speed), pulsewidth ≈ thyristor.Positive u
Wa1It is last negative just down that value is represented the polarity of voltage on the Wa1.The direction of Δ U helps the change of current all the time.The Wa1 that the former limit of these voltages through converter transformer is added among Fig. 1 pays on the winding of limit.Under this pulse Δ U effect; Tha1 is upper left, the trigger impulse of Tha1 bottom right as long as break off; Tha1 is upper left, the electric current of Tha1 bottom right just can the change of current under a Da1 left side, Da1 is upper right, Tha1 is upper left, the Tha1 bottom right is born back-pressure and turn-offed, demarcate about 100 μ s of turn-off time through thyristor after; Tha1 is upper left, turn-off fully the Tha1 bottom right, and upper left, the bottom right brachium pontis electric current of a1 bridge changed to left following, upper right brachium pontis.Again the duty cycle adjustment switch I GBT of conducting chopper control device; Add under the Tha1 left side simultaneously, Tha1 is upper right opens pulse; When treating the current reversal of transformer, under the Da1 left side, the upper right electric current vanishing of Da1 and under the Tha1 left side, the upper right electric current of Tha1 begins to rise.After 180 °, the brachium pontis of will switching on similarly gains again.
Above-mentioned situation is the working condition of first order inverter.2nd ..., n level inverter work be identical.
The output of inverter is received one group of coil of intermediate frequency transformer, and the mid point of coil is received the mid point of the DC power supply of input.Because half on a transformer left side and right half coil voltage must equate, so half-sum lower semisection voltage also must equate on the DC power supply of chopper output, thereby the last half-sum lower semisection voltage of the DC power supply of input also must equate=U
d/ 2n.
All on same iron core, then the voltage of n level dividing potential drop voltage regulator also must equate with the transformer coil of n level dividing potential drop voltage regulator.All pressures of this method for equalizing voltage are very capable.
Specific embodiment 2 (as shown in Figure 2):
Compare with specific embodiment 1, its difference is that every group of transformer coil no longer draw mid point, and every component depressor does not have mid point yet, and therefore the chopper switches in every component depressor also can be only with one, perhaps can be still same as in figure 1 and do not draw mid point.
Claims (5)
1. a DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press comprises the identical voltage divider of n group structure, and n is >=1 integer; It is characterized in that; Every component depressor has: two electrolytic capacitors that are connected into a group; Become one group of two electrolytic capacitor; The positive and negative end of every group of two electrolytic capacitors is connected to a chopper switches, the output termination of two chopper switches the fly-wheel diode of two series connection, the mid point of series connection fly-wheel diode combination is received the mid point of two electrolytic capacitors; Described n component depressor input is connected and synchronous break-make each other, and the output of every component depressor links to each other with the input of an inverter respectively, and inverter structures at different levels are all identical; The output of inverter is received one group of coil of intermediate frequency transformer, and the mid point of this group coil is received the mid point of two electrolytic capacitors, and the coil that inverter output end at different levels connect is all on same iron core;
Wherein, Each grade inverter is single-phase full bridge; Each brachium pontis is made up of thyristor and anti-and diode, and each thyristor diode of having connected again wherein has been connected in series the secondary winding (W) of a converter transformer between every pair of upper and lower brachium pontis of each single-phase full bridge; The direction of the change of current is the diode that the thyristor of a brachium pontis from every pair of upper and lower brachium pontis is changed to another brachium pontis, and the direction of the change of current voltage that converter transformer produced must help such change of current.
2. DC electronic dividing potential drop voltage regulator according to claim 1; It is characterized in that; In described each component depressor, have 0～(n-1) group fully not output DC flow to external circuit and only output to transformer coil, all the other n～1 component depressor outputs to external circuit with electric current.
3. DC electronic dividing potential drop voltage regulator according to claim 1; It is characterized in that; Allow the direct voltage of each component depressor input unequal, this moment, the direct voltage of each component depressor output was also unequal, and intermediate frequency transformer coil turn at different levels is unequal too.
4. DC electronic dividing potential drop voltage regulator according to claim 1 is characterized in that the chopper switches of n component depressor is synchronous break-make, and one group of two interior chopper switches also is the while break-make.
5. a DC electronic dividing potential drop voltage regulator that utilizes intermediate frequency transformer all to press comprises the identical voltage divider of n group structure, and n is >=1 integer; It is characterized in that every component depressor has an electrolytic capacitor, the one of which termination has a chopper switches, the identical and synchronous break-make of each chopper structure; Connect a fly-wheel diode between the other end of this electrolytic capacitor and the other end of chopper switches; The output of every component depressor links to each other with the input of an inverter respectively, and inverter structures at different levels are all identical; The output of inverter is received one group of coil of intermediate frequency transformer, and the coil that inverter output end at different levels connect is all on same iron core;
Wherein, each grade inverter is single-phase full bridge, and each brachium pontis is made up of thyristor and anti-and diode, wherein each thyristor diode of having connected again; Between every pair of upper and lower brachium pontis of each single-phase full bridge, be connected in series the secondary winding (W) of a converter transformer; The direction of the change of current is the diode that the thyristor of a brachium pontis from every pair of upper and lower brachium pontis is changed to another brachium pontis, and the direction of the change of current voltage that converter transformer produced must help such change of current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102062545A CN102386777B (en) | 2011-07-21 | 2011-07-21 | Direct current electron voltage-dividing voltage regulator for sharing voltage by utilizing intermediate frequency transformer |
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| CN2011102062545A CN102386777B (en) | 2011-07-21 | 2011-07-21 | Direct current electron voltage-dividing voltage regulator for sharing voltage by utilizing intermediate frequency transformer |
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| CN102386777B CN102386777B (en) | 2013-12-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004015843A (en) * | 2002-06-03 | 2004-01-15 | Shizuki Electric Co Inc | Voltage-equalizing circuit for electricity-storing element, and voltage-detecting circuit and equalizing charging circuit utilizing the same |
| CN201577027U (en) * | 2009-12-18 | 2010-09-08 | 山东新风光电子科技发展有限公司 | Forced equalizer circuit for diode clamping multi-electrical level inverter |
| CN202172362U (en) * | 2011-07-21 | 2012-03-21 | 汪槱生 | Direct current electronic voltage dividing and regulating device using medium frequency transformer for sharing voltage |
-
2011
- 2011-07-21 CN CN2011102062545A patent/CN102386777B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004015843A (en) * | 2002-06-03 | 2004-01-15 | Shizuki Electric Co Inc | Voltage-equalizing circuit for electricity-storing element, and voltage-detecting circuit and equalizing charging circuit utilizing the same |
| CN201577027U (en) * | 2009-12-18 | 2010-09-08 | 山东新风光电子科技发展有限公司 | Forced equalizer circuit for diode clamping multi-electrical level inverter |
| CN202172362U (en) * | 2011-07-21 | 2012-03-21 | 汪槱生 | Direct current electronic voltage dividing and regulating device using medium frequency transformer for sharing voltage |
Non-Patent Citations (1)
| Title |
|---|
| 李国丽等: "二极管钳位型多电平逆变器脉宽调制时电容电压均衡方法", 《电工技术学报》 * |
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