CN204669228U - A kind of electric supply system inverter circuit being easy to extended power - Google Patents
A kind of electric supply system inverter circuit being easy to extended power Download PDFInfo
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- CN204669228U CN204669228U CN201520285536.2U CN201520285536U CN204669228U CN 204669228 U CN204669228 U CN 204669228U CN 201520285536 U CN201520285536 U CN 201520285536U CN 204669228 U CN204669228 U CN 204669228U
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- 239000000178 monomer Substances 0.000 description 6
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Abstract
The utility model relates to a kind of electric supply system inverter circuit being easy to extended power, comprise converter main circuit, control board and drive plate, this converter main circuit is composed in parallel by the inversion unit that n platform structure is identical, every platform inversion unit includes the current rectifying and wave filtering circuit connected successively, inverter circuit, power transformer and lower pressure rectifier circuit, inverter circuit outlet line is connected in series current sampler, current sampler exports and is connected with control board, the pulse signal that in control board, PDM keyer exports distributes n the drive plate exported to corresponding to n platform inversion unit through distributor, n drive plate drives n platform inversion unit.The inverter that the utility model provides controls without the need to current-sharing adjustment, and circuit reduction, effectively reduces cost, improves system reliability, especially becomes to high-power grade Directional Extension and is more prone to.
Description
Technical field
The utility model belongs to power supply system technical field, particularly a kind of electric supply system inverter circuit being easy to extended power.
Background technology
Because inverter operating frequency is far away higher than transformer operating frequency, and volume of transformer, weight and its operating frequency are inversely proportional to, thus inverter have that volume is little, lightweight, efficient electricity-saving and the feature such as characteristic is good.But current produced inverter maximum operating currenbt only reaches 650A, this inverter can meet conventional needs, but needing the power supply occasion of larger rated current, is just difficult to satisfy the demand.In order to realize high-power output, generally adopt the modular system of the parallel connection of multiple small-power unit or multiple small-power wired in parallel at present, until meet the power demand of load.
A kind of inverter is provided in prior art, this inverter can improve the power grade of whole power-supply system, thus improve the stability of electric power system, but, multiple monomer parallel connections not only increase the volume of whole inverter, and be difficult to reduce the circulation between each monomer, thus realize load sharing.Specifically, due to the inconsistency of each monomer parameter, cause amount of monomer in parallel more, and then cause current-sharing and circulation to control more difficult.
In order to the problem that the control solving above-mentioned current-sharing and circulation existence is more difficult, prior art also been proposed a kind of improvement opportunity, namely in inversion control unit, circulation control unit is increased, respectively the size of current flowing through each power monomer is sampled, and feed back to circulation control unit to carry out equilibrium treatment.Technique scheme, although solve the circulation problem existed in prior art, owing to needing to increase extra hardware circuit, make system become complicated, cost increases, and reliability reduces.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and proposes a kind of electric supply system inverter circuit being easy to extended power.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of electric supply system inverter circuit being easy to extended power, comprise converter main circuit, control board and drive plate, this converter main circuit is composed in parallel by the inversion unit that n platform structure is identical, for general supply is just exporting after the output plus terminal of n platform inversion unit is in parallel, for general supply exports negative after the output negative terminal of n platform inversion unit is in parallel, general supply outlet line is connected in series a current sampler for current signal sampling, current sampler exports and is connected with control board, control board is connected with drive plate, drive plate is connected with each inversion unit
Wherein, every platform inversion unit includes current rectifying and wave filtering circuit connected in series successively, inverter circuit, power transformer and lower pressure rectifier circuit;
Wherein, described drive plate is n the drive plate corresponding to n platform inversion unit, in each inversion unit, the control pole of inverter circuit connects with the triggering signal output of corresponding drive plate, the corresponding output of the control signal input difference connection control plate of n drive plate;
Wherein, described control board comprises the pulse signal distribution device of PDM keyer and n group, the output of described current sampler is connected with the input pin of PDM keyer medial error amplifier, the duty ratio of pulse is exported for controlling this PDM keyer, the input of described n group pulse signal distributor is connected with PDM keyer output pin, the output signal of PDM keyer is become n group output signal and exports to n drive plate terminals.
And, the half bridge inverter circuit that described inverter circuit is made up of single power semiconductor module and derided capacitors.
And described current sampler is shunt or Hall current sensor.
And, after every platform inversion unit negative terminal respectively tandem electric inductance Ln, carry out parallel connection again.
Advantage of the present utility model and good effect are:
1, the inverter that the utility model provides controls without the need to current-sharing adjustment, thus software and hardware control circuit is simplified, and effectively reduces cost, improves system reliability.
2, the utility model can realize the output of monomer different capacity grade neatly by the quantity of increase and decrease parallel branch, especially becomes to high-power grade Directional Extension and is more prone to.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Embodiment
Implement to be further described to the utility model below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection range of the present utility model with this.
A kind of electric supply system inverter circuit being easy to extended power, as shown in Figure 1, this inverter comprises converter main circuit 1, control board 2 and drive plate 3, this converter main circuit is composed in parallel by the inversion unit 4 that n platform structure is identical, for general supply is just exporting after anode after n platform inversion unit inversion rectification is in parallel, for general supply exports negative after negative terminal after inversion rectification is in parallel, general supply outlet line is connected in series a current sampler 9 for current signal sampling, current sampler exports and is connected with control board, the input of the error amplifier in middle corresponding PDM keyer connects, the duty ratio of pulse is exported for controlling this pulse width modulator, every platform inversion unit includes current rectifying and wave filtering circuit 5 connected in series successively from input, inverter circuit 6, power transformer 7 and lower pressure rectifier circuit 8,
Wherein, the half bridge inverter circuit that inverter circuit is made up of single power semiconductor module and derided capacitors, certainly, this inverter circuit also can be other bridge inverter main circuits, such as, full bridge inversion circuit.
Wherein, described drive plate is n the drive plate corresponding to n platform inversion unit, the control pole of the power semiconductor module of each inversion unit connects with the triggering signal output of corresponding drive plate, the corresponding output of the control signal input difference connection control plate of n drive plate.
Wherein, described current sampler exports to connect with control board and is: the input of the error amplifier that current sampler exports in PDM keyer corresponding to control board is connected, for controlling the duty ratio of this pulse width modulator output pulse.
In concrete enforcement of the present utility model, current sampler is shunt, certainly, also can use Hall current sensor in other examples.The output positive and negative terminal of current sampler connects the input pin of the error amplifier in PDM keyer respectively, corresponding to a said n drive plate, be provided with n group pulse signal distributor, the input of n group pulse signal distributor connects PDM keyer output pin, two of PDM keyer groups of output signals is become n group output signal via n group pulse signal distributor and connects a said n drive plate terminals.
In concrete enforcement of the present utility model, every platform inversion unit negative terminal carries out parallel connection after tandem electric inductance Ln respectively again, bears, certainly, be connected in series an inductance again after every platform inversion unit negative terminal carries out parallel connection as general supply.
Claims (4)
1. one kind is easy to the electric supply system inverter circuit of extended power, it is characterized in that: comprise converter main circuit, control board and drive plate, this converter main circuit is composed in parallel by the inversion unit that n platform structure is identical, for general supply is just exporting after the output plus terminal of n platform inversion unit is in parallel, for general supply exports negative after the output negative terminal of n platform inversion unit is in parallel, general supply outlet line is connected in series a current sampler for current signal sampling, current sampler exports and is connected with control board, control board is connected with drive plate, drive plate is connected with each inversion unit,
Wherein, every platform inversion unit includes current rectifying and wave filtering circuit connected in series successively, inverter circuit, power transformer and lower pressure rectifier circuit;
Wherein, described drive plate is n the drive plate corresponding to n platform inversion unit, in each inversion unit, the control pole of inverter circuit connects with the triggering signal output of corresponding drive plate, the corresponding output of the control signal input difference connection control plate of n drive plate;
Wherein, described control board comprises the pulse signal distribution device of PDM keyer and n group, the output of described current sampler is connected with the input pin of PDM keyer medial error amplifier, the duty ratio of pulse is exported for controlling this PDM keyer, the input of described n group pulse signal distributor is connected with PDM keyer output pin, the output signal of PDM keyer is become n group output signal and exports to n drive plate terminals.
2. the electric supply system inverter circuit being easy to extended power according to claim 1, is characterized in that: the half bridge inverter circuit that described inverter circuit is made up of single power semiconductor module and derided capacitors.
3. the electric supply system inverter circuit being easy to extended power according to claim 1, is characterized in that: described current sampler is shunt or Hall current sensor.
4. the electric supply system inverter circuit being easy to extended power according to claim 1, is characterized in that: after every platform inversion unit negative terminal respectively tandem electric inductance Ln, carry out parallel connection again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520285536.2U CN204669228U (en) | 2015-05-06 | 2015-05-06 | A kind of electric supply system inverter circuit being easy to extended power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520285536.2U CN204669228U (en) | 2015-05-06 | 2015-05-06 | A kind of electric supply system inverter circuit being easy to extended power |
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| CN204669228U true CN204669228U (en) | 2015-09-23 |
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| CN201520285536.2U Active CN204669228U (en) | 2015-05-06 | 2015-05-06 | A kind of electric supply system inverter circuit being easy to extended power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115066115A (en) * | 2022-08-18 | 2022-09-16 | 上海捷勃特机器人有限公司 | Control cabinet for robot drive and assembling method thereof |
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2015
- 2015-05-06 CN CN201520285536.2U patent/CN204669228U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115066115A (en) * | 2022-08-18 | 2022-09-16 | 上海捷勃特机器人有限公司 | Control cabinet for robot drive and assembling method thereof |
| CN115066115B (en) * | 2022-08-18 | 2022-12-02 | 上海捷勃特机器人有限公司 | Control cabinet for robot drive and assembling method thereof |
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