CN101958661B - Method for regularly switching operating mode of inversion circuit electrical bridge - Google Patents
Method for regularly switching operating mode of inversion circuit electrical bridge Download PDFInfo
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- CN101958661B CN101958661B CN201010513253A CN201010513253A CN101958661B CN 101958661 B CN101958661 B CN 101958661B CN 201010513253 A CN201010513253 A CN 201010513253A CN 201010513253 A CN201010513253 A CN 201010513253A CN 101958661 B CN101958661 B CN 101958661B
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Abstract
The invention relates to a method for regularly switching the operating mode of an inversion circuit electrical bridge, belonging to the field of inversion power supply. The invention discloses a method for regularly switching the operating mode of an inversion circuit electrical bridge, comprising the following steps of: S1, detecting the current offset value deltai of a load current i1 and a given current ig according to a preset period, executing the step S2 when the current offset value deltai is negative, otherwise, executing the step S3; S2, switching to a zero mode if the operating mode of the inversion electrical bridge in the previous state is the mode 10, otherwise, switching to the mode 01; and S3, switching to a zero mode if the operating mode of the inversion electrical bridge in the previous state is under the mode 01, otherwise, switching to the mode 10. The invention ensures that the inversion power device has the advantages of rapid tracking speed, higher tracking precision, stronger robustness and less electromagnetic radiation interference.
Description
Technical field
The present invention relates to the inverter field, relate in particular to a kind of timing changing method of inverter circuit electric bridge mode of operation.
Background technology
As shown in Figure 1, adopt 4 controlled power devices and 4 diodes can form single-phase full bridge inverter circuit commonly used.V
DCBe the direct current input of inverter circuit, A is the output that exchanges of inverter circuit with 2 of B.In the circuit in A and B two brachium pontis up and down two power device T1 do not allow the while conducting with T2, T3 and T4.Define the break-make operating mode of the mode of operation of brachium pontis A and B according to power device:
During top power device conducting, the mode of operation of brachium pontis is 1; During bottom power device conducting, the mode of operation of brachium pontis is 0.According to this definition, the mode of operation of the inversion electric bridge that A and B two brachium pontis are combined has following 4 kinds:
10 patterns: A brachium pontis T1 or D1 conducting, B brachium pontis T4 or D4 conducting; Inverter circuit output: A is for just, and B is for bearing;
01 pattern: A brachium pontis T2 or D2 conducting, B brachium pontis T3 or D3 conducting; Inverter circuit output: A is for negative, and B is for just;
00 pattern: A brachium pontis T2 or D2 conducting, B brachium pontis T4 or D4 conducting; Inverter circuit output: A and B equipotential;
11 patterns: A brachium pontis T1 or D1 conducting, B brachium pontis T3 or D3 conducting; Inverter circuit output: A and B equipotential.
Under 10 pattern operating modes, output U
ABFor just, load current i
lIncrease; Under 01 pattern operating mode, output U
ABFor negative, load current i
lReduce; Under 00 and 11 pattern operating modes, output U
ABBe zero, load current i
lAbsolute value decay naturally according to the characteristic of load, as load current i
lThe speed that decays naturally according to the characteristic of load of absolute value decay less than given electric current absolute value speed the time, load current i
lJust can not follow given electric current and produce distortion.
10 patterns and 01 pattern are called non-null mode, 00 pattern and 11 patterns are called null mode.
Through the mode of operation of inversion electric bridge is controlled, can make load current i
lFollow given change in current.Classical control method has following 3 kinds:
Current tracking method: load current i
1With given current i
gAfter comparing, resultant current deviation value Δ i=i
g-i
lAfter adjuster is handled, input to the control device that the back level adopts the nature modulation method, convert thereof into the pulse of respective widths, drive the action of corresponding power device, to reach load current i
lFollow the purpose of given change in current.In this control procedure, T1, T2, T3, four power devices of T4 at least also only have 2 participation work, and the operational mode change of circuit is as shown in Figure 2.Can be known that by Fig. 22 non-zero mode of operations inequality can not directly be changed, null mode must be passed through in the centre, output U
ABThe absolute value that switches the change in voltage of moment at power device is V
DCThe major defect of this control method is that tracking error is bigger, and the stability of a system changes comparatively responsive to parameter.
Sluggish winding control method: i is a variable with current deviation value Δ, according to set sluggish winding as criterion, for fear of load current i
lThe distortion that can not follow given electric current and produce lets the mode of operation of circuit not pass through null mode, between 2 non-null modes, directly switches, and current deviation value Δ i is controlled in the set sluggish winding.This control method not only has tracking velocity and reaches the tracking accuracy advantage of higher soon, and the stability of a system is insensitive to the parameter variation, and promptly system has stronger robustness; Owing between 2 non-null modes, directly carry out the switching of mode of operation; Therefore the dv/dt that is produced is bigger than the switching of carrying out through null mode with di/dt; The electromagnetic interference that is produced thus is also more intense, is unfavorable for the steady operation of system, and this is the shortcoming of this control method.
Timing switching controls method: i is a variable with current deviation value Δ, detects the current deviation value according to set cycle T, and i is correct time when current deviation value Δ, and mode of operation switches to 10; Otherwise, then switch to 01.The pluses and minuses of this control method are identical with sluggish winding control method.
Summary of the invention
The technical problem that the present invention will solve is; To defectives such as the tracking error of prior art are big, robustness is more weak or electromagnetic interference is stronger, the timing changing method that a kind of tracking velocity is fast, tracking accuracy is high, robustness is strong and have the inverter circuit electric bridge mode of operation of disturbing than the light current magnetic radiation is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of timing changing method of inverter circuit electric bridge mode of operation may further comprise the steps:
S1. detect load current i according to predetermined period
lWith given current i
gCurrent deviation value Δ i, when current deviation value Δ i when negative, execution in step S2, otherwise execution in step S3;
S2. if inversion electric bridge previous state mode of operation is 10 patterns, then switches to null mode, otherwise switch to 01 pattern;
S3. if inversion electric bridge previous state mode of operation is 01 pattern, then switches to null mode, otherwise switch to 10 patterns.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, among the step S1, the intermediate point in two moment that inversion electric bridge mode of operation is switched detects current deviation value Δ i.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, among the step S2, in the time of null mode need being switched to,, then switch to 11 patterns if last null mode is 00 pattern.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, among the step S2, in the time of null mode need being switched to,, then switch to 00 pattern if last null mode is 11 patterns.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, among the step S3, in the time of null mode need being switched to,, then switch to 11 patterns if last null mode is 00 pattern.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, among the step S3, in the time of null mode need being switched to,, then switch to 00 pattern if last null mode is 11 patterns.
In the timing changing method of inverter circuit electric bridge mode of operation of the present invention, the timing changing method of said inverter circuit electric bridge mode of operation is used to control the single-phase full bridge inverter circuit that comprises 4 controlled power devices and 4 diodes.
The beneficial effect of the timing changing method of inverter circuit electric bridge mode of operation of the present invention is: can overcome the prior art control method the shortcoming that exists respectively; And combine its advantage; Make system not only have the fast and tracking accuracy advantage of higher of tracking velocity, also have stronger robustness and less electromagnetic interference.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the unidirectional full bridge inverter sketch map of prior art;
Fig. 2 adopts the mode of operation of the inverter circuit of prior art current tracking control method to switch sketch map;
Fig. 3 is the circulation sketch map according to the timing changing method of the inverter circuit electric bridge mode of operation of the embodiment of the invention;
Fig. 4 is that the timing according to the inverter circuit electric bridge mode of operation of the embodiment of the invention distributes sketch map switching time.
Embodiment
In one embodiment of the invention, be that example describes with the single-phase full bridge inverter circuit that comprises 4 controlled power devices and 4 diodes as shown in Figure 1.In this embodiment, a kind of timing changing method of inverter circuit electric bridge mode of operation starts from step S1.In step S1, according to predetermined period, the intermediate point in two moment that inversion electric bridge mode of operation is switched detects load current i
lWith given current i
gCurrent deviation value Δ i.For example, as shown in Figure 4, t1, t3, t5 ... T2n+1 is the mode of operation switching point, t0, t2, t4 ... T2n is a Δ i test point, and T=△ t=t2-t0 is regularly switching cycle, i.e. preset clock period.When current deviation value Δ i when negative, execution in step S2, otherwise execution in step S3.
In step S2, carry out the switching of current state mode of operation according to the previous state mode of operation of inversion electric bridge.If inversion electric bridge previous state mode of operation is 10 patterns, then select another null mode different to switch with last null mode according to last null mode.For example, if last null mode is 00 pattern, then the current state mode of operation switches to 11 patterns.Again for example, if last null mode is 11 patterns, then the current state mode of operation switches to 00 pattern.If inversion electric bridge previous state mode of operation is not 10 patterns, for example be 00 pattern or 11 patterns, then the current state mode of operation switches to 01 pattern.
In step S3, carry out the switching of current state mode of operation according to the previous state mode of operation of inversion electric bridge.If inversion electric bridge previous state mode of operation is 01 pattern, then select another null mode different to switch with last null mode according to last null mode.For example, if last null mode is 00 pattern, then the current state mode of operation switches to 11 patterns.Again for example, if last null mode is 11 patterns, then the current state mode of operation switches to 00 pattern.If inversion electric bridge previous state mode of operation is not 01 pattern, for example be 00 pattern or 11 patterns, then the current state mode of operation switches to 10 patterns.
In other embodiments of the invention, the timing changing method of inverter circuit electric bridge mode of operation provided by the present invention can also be used to control the inverter circuit of other any appropriate.
Fig. 3 is the circulation sketch map according to the timing changing method of the inverter circuit electric bridge mode of operation of the embodiment of the invention.As shown in Figure 3, GM is the mode of operation of inversion electric bridge.In this embodiment, above-mentioned steps is carried out in circulation in each mode of operation switching cycle.
The interference that the present invention is produced when power device commutates, the intermediate point in two moment that power device commutates carries out the detection of current deviation value Δ i.The present invention has introduced the odd-job operation mode, has only a power device to switch at every turn, when needs when two non-zero mode of operations are switched; Must and must be through the odd-job operation mode; In other words, when two non-zero mode of operations are switched, need two clock cycle to accomplish.Adopt the timing changing method of inverter circuit electric bridge mode of operation provided by the present invention to control inverter; Not only inherit prior art timing method for handover control and had the robustness and the advantage of current following characteristic preferably fast; Can also reduce the value of dv/dt and di/dt effectively, make inverter have Electro Magnetic Compatibility preferably.In addition, the present invention has balancedly used two null modes, promptly balancedly used all power devices, and the dynamic loss of power device when having reduced to switch has prolonged useful life of power device.
Though the present invention describes through specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, to particular condition or material, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (2)
1. the timing changing method of an inverter circuit electric bridge mode of operation, said inverter circuit comprises 4 controlled power devices and 4 diodes, V
DCIt is the direct current input of inverter circuit; A is the output that exchanges of inverter circuit with 2 of B; In the inverter circuit in A and B two brachium pontis up and down two power device T1 do not allow the while conducting with T2, T3 and T4; Define the break-make operating mode of the mode of operation of brachium pontis A and B according to power device: during the power device conducting of top, the mode of operation of brachium pontis is 1; During bottom power device conducting, the mode of operation of brachium pontis is 0; According to this definition, the mode of operation of the inversion electric bridge that A and B two brachium pontis are combined has following 4 kinds: 1. 10 patterns: A brachium pontis T1 or D1 conducting, B brachium pontis T4 or D4 conducting; Inverter circuit output: A is for just, and B is for bearing; 2. 01 pattern: A brachium pontis T2 or D2 conducting, B brachium pontis T3 or D3 conducting; Inverter circuit output: A is for negative, and B is for just; 3. 00 pattern: A brachium pontis T2 or D2 conducting, B brachium pontis T4 or D4 conducting; Inverter circuit output: A and B equipotential; 4. 11 patterns: A brachium pontis T1 or D1 conducting, B brachium pontis T 3 or D3 conducting; Inverter circuit output: A and B equipotential; It is characterized in that, said method comprising the steps of:
S1. detect load current il and given current i according to predetermined period
gCurrent deviation value Δ i, when current deviation value Δ i when negative, execution in step S2, otherwise execution in step S3; Said Δ i=i
g-il;
S2. if inversion electric bridge previous state mode of operation is 10 patterns, then switches to null mode, otherwise switch to 01 pattern; When switching to null mode, if last null mode is 00 pattern, then switch to 11 patterns, if last null mode is 11 patterns, then switch to 00 pattern;
S3. if inversion electric bridge previous state mode of operation is 01 pattern, then switches to null mode, otherwise switch to 10 patterns; When switching to null mode, if last null mode is 00 pattern, then switch to 11 patterns, if last null mode is 11 patterns, then switch to 00 pattern;
In said step S1, the intermediate point in two moment that inversion electric bridge mode of operation is switched detects current deviation value Δ i.
2. according to the timing changing method of the inverter circuit electric bridge mode of operation in the claim 1; It is characterized in that the timing changing method of said inverter circuit electric bridge mode of operation is used to control the single-phase full bridge inverter circuit that comprises 4 controlled power devices and 4 diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010513253A CN101958661B (en) | 2010-10-20 | 2010-10-20 | Method for regularly switching operating mode of inversion circuit electrical bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010513253A CN101958661B (en) | 2010-10-20 | 2010-10-20 | Method for regularly switching operating mode of inversion circuit electrical bridge |
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| CN101958661A CN101958661A (en) | 2011-01-26 |
| CN101958661B true CN101958661B (en) | 2012-09-12 |
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|---|---|---|---|
| CN201010513253A Expired - Fee Related CN101958661B (en) | 2010-10-20 | 2010-10-20 | Method for regularly switching operating mode of inversion circuit electrical bridge |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3475805B2 (en) * | 1998-09-14 | 2003-12-10 | 松下電工株式会社 | Inverter device |
| CN1658485A (en) * | 2005-03-10 | 2005-08-24 | 上海交通大学 | Counter control current tracking control method based on average current compensation |
| CN1858982A (en) * | 2006-05-22 | 2006-11-08 | 南京航空航天大学 | Method and circuit for controlling changing cyclic width lag cyclic current of inventer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2995373B2 (en) * | 1993-01-18 | 1999-12-27 | 株式会社三社電機製作所 | Control method of power supply for metal halide lamp |
| AUPQ381199A0 (en) * | 1999-11-02 | 1999-11-25 | Borle, Lawrence Joseph | Control circuit for a switching regulator |
-
2010
- 2010-10-20 CN CN201010513253A patent/CN101958661B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3475805B2 (en) * | 1998-09-14 | 2003-12-10 | 松下電工株式会社 | Inverter device |
| CN1658485A (en) * | 2005-03-10 | 2005-08-24 | 上海交通大学 | Counter control current tracking control method based on average current compensation |
| CN1858982A (en) * | 2006-05-22 | 2006-11-08 | 南京航空航天大学 | Method and circuit for controlling changing cyclic width lag cyclic current of inventer |
Non-Patent Citations (3)
| Title |
|---|
| JP特开平6-215882A 1994.08.05 |
| JP特许3475805B2 2003.12.10 |
| 王兆安等.电力电子技术.《电力电子技术》.机械工业出版社,2001, * |
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Application publication date: 20110126 Assignee: Shenzhen keaoxin Electronic Co. Ltd. Assignor: Shenzhen Keaoxin Battery Technology Co., Ltd. Contract record no.: 2014440000177 Denomination of invention: Method for regularly switching operating mode of inversion circuit electrical bridge Granted publication date: 20120912 License type: Exclusive License Record date: 20140423 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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Granted publication date: 20120912 Termination date: 20191020 |