CN201878014U - Feedback load energy-saving circuit for aging testing - Google Patents
Feedback load energy-saving circuit for aging testing Download PDFInfo
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- CN201878014U CN201878014U CN2010206585177U CN201020658517U CN201878014U CN 201878014 U CN201878014 U CN 201878014U CN 2010206585177 U CN2010206585177 U CN 2010206585177U CN 201020658517 U CN201020658517 U CN 201020658517U CN 201878014 U CN201878014 U CN 201878014U
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Abstract
The utility model relates to a feedback load energy-saving circuit for aging testing, which comprises a first voltage booster conversion circuit and a second voltage booster conversion circuit which are connected with a power supply input end in parallel, a voltage booster rectifier circuit, an inner loop proportional-integral (PI) regulator and a direct current/alternating current (DC-AC) inverter circuit, wherein the DC/AC inverter circuit mainly comprises four switching power transistors DRV1-DRV4, and control gates of the four switching power transistors DRV1-DRV4 are connected with the inner loop proportional-integral (PI) regulator; and the four switching power transistors are controlled by sinusoidal pulse modulation signals output by the inner loop proportional-integral (PI) regulator. In the circuit, low-voltage and large-current DC input and high-voltage AC output are adopted, and the conversion efficiency is improved by a method of primary parallel connection of the voltage booster circuits and secondary series connection of step-up transformers and a method that a pulse width modulation (PMW) circuit works at a maximum duty factor. In the patent, the voltage booster circuits and inverter decoupling are respectively and independently controlled, the turns ratio of the transformers only need to be correspondingly changed without changing hardware and software of an inverter part when the input voltage of the secondary voltage booster circuit is changed according to the changed demands, and the expansibility is strong.
Description
Technical field
The utility model relates to the energy-saving electric product technology, especially relates to the energy-conservation aging testing system that is suitable for wide-voltage range.
Background technology
In the prior art, as shown in Figure 1, the general purpose type energy-saving aging testing system generally needs two kinds of load blocks to be used: prime load blocks 602 and back level load blocks 620.
Prime load blocks 602 is higher voltage V with the direct current process constant currents such as (3.3V/5V/12V/24V) of the various electric pressures of the test product 601 output control change of boosting
DCINT, back level load blocks 620 generally comprises two parts, booster circuit 621 and inverter 622.
Because the output voltage of test product 601 is generally all lower, the output voltage V of institute's preceding stage load blocks 602
DCINTAlso lower, under same power condition, mean that the input current of secondary booster part is bigger, and V
BUSGenerally need reach more than the 380V, promptly the secondary booster module is the low-voltage, high-current input, the booster circuit of high pressure output.
Since existing power electronic technology research be generally the high pressure input, the technology of low-voltage, high-current output is exported applicable cases research and is not appeared in the newspapers for this low-voltage, high-current input, the high pressure of energy-conservation load.
The control of energy-conservation load is also different with the control method of general power electronic technology, because for the load current that guarantees tested product constant, the prime load blocks adopts input current constant current control, so its output voltage is not a constant pressure source just, but decide by its input power and power output matching degree, when input power during greater than power output, its output voltage can continue to raise, otherwise then continues to reduce until to zero.
How to guarantee the system power balance, controlling each step voltage stable is a particularly difficult point of general purpose type energy-saving load of energy-conservation load.
The utility model content
In order to solve the technical problem that exists in the prior art, the utility model proposes a kind of efficiently, the strong burn-in test of autgmentability is with feedback load energy-saving circuit.
Booster circuit of the present utility model and inverter independence decoupling zero control, the size of inverter control busbar voltage Vbus and grid-connected current, booster circuit control input voltage V
DCINTSize,
The utility model is achieved by the following technical solution.
The utility model is based on the aging circuit that is provided with the prime load blocks, and the input of described prime load blocks connects the output of test product, and the utility model also has back level load blocks.
Manufacture and design a kind of burn-in test feedback load energy-saving circuit, described circuit comprises: a pulse generator;
First boost conversion circuit comprises pulse transformer T1;
Second boost conversion circuit comprises pulse transformer T2;
One boost rectifying circuit;
Ring pi regulator in one;
One DC/AC inverter circuit;
The secondary boost rectifying circuit that is connected in series of pulse transformer T1 and pulse transformer T2 boosts
The output of rectification circuit is high direct voltage Vbus;
The power access end of described first boost conversion circuit and second boost conversion circuit also meets output V back and the prime load blocks
DCINTConnect;
Described DC/AC inverter circuit is that the master constitutes by four IGBT DRV1～DRV4, and their the control utmost point is connected with interior ring pi regulator, is subjected to the control of the sinusoidal pulse width modulation signal of its output, and the DC/AC inverter circuit is to electrical network P1 output grid-connected current.
The control impuls of described pulse generator output fixed duty cycle.
Described DC/AC inverter circuit is in the circuit of electrical network P1 output grid-connected current, be serially connected with a relay contact K1 and Hall current sensor H1, relay contact K1 is used for DC/AC inverter circuit and electrical network are separated, when line voltage or frequency are undesired, disconnect K1, realize protection the DC/AC inverter circuit;
Hall current sensor H1 detects grid-connected current and detection signal is input to interior ring pi regulator and controls.
Prime load blocks of the present utility model is higher voltage V with the direct current 3.3V/5V/12V/24V of the various electric pressures of test product output through the constant current control change of boosting
DCINT, back level load blocks generally comprises two parts: booster circuit and inverter circuit.
The utility model is with V
DCINTBoost to higher direct voltage V
BUS, inverter is with V
BUSBe transformed into alternating current be connected to the grid recycling, to reach purpose of energy saving.
A kind of direct current of low-voltage, high-current efficiently input, high-voltage alternating output circuit that this patent proposed, the method by the elementary parallel connection of booster circuit, the secondary series connection of step-up transformer has improved conversion efficiency.The utility model adopts the method for open loop control simultaneously, and pwm circuit has further improved conversion efficiency with maximum duty cycle work.
The utility model circuit has embodied the control method of a kind of independent booster circuit and inverter decoupling zero, both distinguish independent control, like this, when demand has change, when requiring the input voltage variation of secondary booster circuit, only need in the design that the transformer turn ratio of booster circuit is done corresponding change and get final product, the hardware and software of inverter section all need not done any change, and autgmentability is strong.
Description of drawings
Fig. 1 is the functional block diagram of energy-conservation aging testing system general in the prior art;
Fig. 2 is the electrical schematic diagram of a kind of burn-in test of the utility model with booster circuit in the feedback load energy-saving circuit;
Fig. 3 is the electrical schematic diagram of a kind of burn-in test of the utility model with inverter circuit in the feedback load energy-saving circuit;
Fig. 4 is the principle calcspar that a kind of burn-in test of the utility model is controlled with feedback load energy-saving circuit.
Embodiment
In order to further specify the utility model, now be elaborated, yet the described embodiment usefulness for furnishing an explanation and explaining only can not be used for limiting scope of patent protection of the present utility model in conjunction with a preferred embodiment of the present utility model.
The utility model is based on the aging circuit that is provided with prime load blocks 602, and the input of described prime load blocks 602 connects the output of test product 601.
Manufacture and design a kind of burn-in test feedback load energy-saving circuit, as Fig. 2, shown in Figure 3, described circuit comprises: a pulse generator 81;
First boost conversion circuit 82 comprises pulse transformer T1;
Second boost conversion circuit 83 comprises pulse transformer T2;
One boost rectifying circuit;
Ring pi regulator 91 in one;
One DC/AC inverter circuit 95;
The secondary boost rectifying circuit that is connected in series of pulse transformer T1 and pulse transformer T2 boosts
The output of rectification circuit is high direct voltage Vbus;
The power access end of described first boost conversion circuit 82 and second boost conversion circuit 83 also meets output V back and prime load blocks 602
DCINTConnect;
Described DC/AC inverter circuit 95 is that the master constitutes by four switching power tube DRV1～DRV4, and their grid is connected with interior ring pi regulator 91, is subjected to the control of the sinusoidal pulse width modulation signal of its output, and DC/AC inverter circuit 95 is to electrical network P1 output grid-connected current.
The control impuls of described pulse generator 81 output fixed duty cycles.
50% duty ratio for example is in the hope of obtaining maximal efficiency.
Described DC/AC inverter circuit 95 is in the circuit of electrical network P1 output grid-connected current, be serially connected with a relay contact K1 and Hall current sensor H1, relay contact K1 is used for DC/AC inverter circuit 95 and electrical network P1 are separated, when line voltage or frequency are undesired, disconnect K1, realize protection DC/AC inverter circuit 95;
Hall current sensor H1 detects grid-connected current and detection signal is input to interior ring pi regulator 91 and controls.
Among Fig. 2, wherein Q1, Q2, Q3, Q4 constitute a full-bridge circuit, and Q5, Q6, Q7, Q8 constitute another full-bridge circuit, and both inputs also are connected to V
DCINTT1 and T2 are same high frequency transformer, realize elementary secondary electrical isolation, obtain DC bus-bar voltage Vbus through a bridge rectifier rectification that is made of D1～D4 after the secondary series connection of the secondary and T2 of T1.
The power access end of the utility model first boost conversion circuit 82 and second boost conversion circuit 83 also meets output V back and prime load blocks 602
DCINTThe method that connects has reduced the input current of each full-bridge circuit, has reduced system loss.
By the method for transformer secondary output series connection, reduced the voltage of each transformer secondary output, promptly reduced transformer secondary output to elementary turn ratio, reduced the leakage inductance of primary/secondary, promoted conversion efficiency.
In addition, because the transformer secondary output series connection, its electric current is the same, is the same with regard to the electric current that has guaranteed primary also, has reached elementary current-sharing effect.
Shown in Figure 3, switching power tube DRV1～DRV4 constitutes a full bridge inverter, be used for
The 385V direct current is transformed into alternating current.
Operation principle of the present utility model is as follows:
1., with reference to Fig. 1, at first, the secondary DC boosting is carried out in big current low voltage direct current output to prime load blocks 602, it is elevated to more than the direct voltage 300V, adopt two groups of boost conversion circuits when boosting: first boost conversion circuit 82 and second boost conversion circuit 83 as shown in Figure 2, connect the pulse input end of two circuit the output 85,86,87,88,852,862,872,882 of pulse generator 81;
2., after the secondary serial connection mutually with the pulse transformer T2 in the pulse transformer T1 in first boost conversion circuit 82 and second boost conversion circuit 83, connect bridge rectifier more again, 4 pin of T1 as shown in Figure 2 connect 3 pin of T2; Bridge rectifier is made of rectifying tube D1～D4, and it is output as high direct voltage Vbus, when making pulse transformer T1 and pulse transformer T2 the primary and secondary nothing insulated from each other of two pulse transformers is electrically connected;
3., as shown in Figure 3, Figure 4, ring pi regulator 91 in is set;
At an one input, for example pin 92, the synthetic sinusoidal drive signals of the given signal of fundamental current amplitude that access is exported by the output of civil power phase-locked loop module 72 and the busbar voltage control ring that is incorporated into the power networks, another input at interior ring pi regulator 91, for example pin 93, access grid-connected current feedback signal, 91 pairs two signals of interior ring pi regulator carry out Intelligent treatment, and produce the sinusoidal pulse width modulation signal;
4., next, the power end with high direct voltage Vbus connects DC/AC inverter circuit 95 is connected the control utmost point that constitutes four switching power tubes of inverter with interior ring pi regulator 91, accept the control of its sinusoidal pulse width modulation signal, the DC/AC inverter circuit is to electrical network P1 output grid-connected current.
In the said method, as shown in Figure 4, the included outer shroud pi regulator 71 of the 3. described busbar voltage control ring that is incorporated into the power networks of step, outer shroud pi regulator 71 is imported the be incorporated into the power networks given signal of busbar voltage and the busbar voltage fluctuation feedback signal that is incorporated into the power networks, carry out Based Intelligent Control, the given signal of fundamental current amplitude of output.
It more than is the operation principle of the utility model most preferred embodiment.
In control, this patent has embodied the method that decoupling zero is independently controlled, be that Vbus voltage and grid-connected current are controlled by inverter itself, the input voltage of booster circuit is controlled by booster circuit itself, be the input voltage size that inverter need not known the secondary booster circuit, booster circuit also need not be known the size of grid-connected current.Both do not need communication, only connect by Vbus.
Control ring comprises ring in an outer shroud and.
Outer shroud is a 385V busbar voltage ring, by keeping the coupling that 385V guarantees inverter input power and power output that stabilizes to of busbar voltage, when the input power specific power output big, then busbar voltage can increase, at this moment, increase grid-connected current, then busbar voltage can reduce.
Equally, when the input power specific power output is little, then busbar voltage can reduce, and at this moment, reduces grid-connected current, and then busbar voltage can raise.
The difference of busbar voltage actual value and value of feedback is through obtaining the given of grid-connected current fundamental voltage amplitude behind the pi regulator, multiply by the sine value of the electric network voltage phase that phase-locked loop obtains, and the instantaneous value that obtains power network current is given.
In ring be the grid-connected current ring, this environmental protection card grid-connected current waveform with give current waveform consistent.
Open loop control is carried out in the driving of 8 switching power tubes of booster circuit, and promptly its duty ratio is fixed as 50%, and like this, the ratio of primary and secondary voltage is only determined by the turn ratio of transformer that promptly it is essentially a commutator transformer.
Because the Vbus voltage swing is by inverter control, then the input voltage size of secondary voltage circuit is also promptly determined by the turn ratio of transformer.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (3)
1. a burn-in test is characterized in that described circuit comprises: a pulse generator (81) with feedback load energy-saving circuit;
First boost conversion circuit (82) comprises pulse transformer T1;
Second boost conversion circuit (83) comprises pulse transformer T2;
One boost rectifying circuit;
Ring pi regulator (91) in one;
One DC/AC inverter circuit (95);
The power access end of described first boost conversion circuit (82) and second boost conversion circuit (83) also meets output V back and prime load blocks (602)
DCINTConnect;
The secondary boost rectifying circuit that is connected in series of pulse transformer T1 and pulse transformer T2, the output of boost rectifying circuit is high direct voltage Vbus;
Described DC/AC inverter circuit (95) is that the master constitutes by four switching power tube DRV1～DRV4, their grid is connected with interior ring pi regulator (91), be subjected to the control of the sinusoidal pulse width modulation signal of its output, DC/AC inverter circuit (95) is to electrical network P1 output grid-connected current.
2. burn-in test according to claim 1 feedback load energy-saving circuit is characterized in that:
The control impuls of described pulse generator (81) output fixed duty cycle.
3. burn-in test according to claim 1 feedback load energy-saving circuit is characterized in that:
Described DC/AC inverter circuit (95) is in the circuit of electrical network P1 output grid-connected current, be serially connected with a relay contact K1 and Hall current sensor H1, relay contact K1 is used for DC/AC inverter circuit (95) and electrical network P1 are separated, when line voltage or frequency are undesired, disconnect K1, realize protection DC/AC inverter circuit (95);
Hall current sensor H1 detects grid-connected current and detection signal is input to interior ring pi regulator (91) and controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206585177U CN201878014U (en) | 2010-12-14 | 2010-12-14 | Feedback load energy-saving circuit for aging testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206585177U CN201878014U (en) | 2010-12-14 | 2010-12-14 | Feedback load energy-saving circuit for aging testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201878014U true CN201878014U (en) | 2011-06-22 |
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ID=44165922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206585177U Expired - Fee Related CN201878014U (en) | 2010-12-14 | 2010-12-14 | Feedback load energy-saving circuit for aging testing |
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| Country | Link |
|---|---|
| CN (1) | CN201878014U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178729A (en) * | 2011-12-22 | 2013-06-26 | 上海儒竞电子科技有限公司 | Control system of single-phase controllable rectifier |
| CN105763083A (en) * | 2014-12-30 | 2016-07-13 | 易安迪机车公司 | Head end power module having two inverters |
| CN106849678A (en) * | 2017-03-31 | 2017-06-13 | 中国科学院电工研究所 | The power regulating method of multi-inverter parallel inductive electric energy transmission system |
| CN110707941A (en) * | 2019-11-06 | 2020-01-17 | 湖南微网能源技术有限公司 | High-frequency high-power wave generation method |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
-
2010
- 2010-12-14 CN CN2010206585177U patent/CN201878014U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178729A (en) * | 2011-12-22 | 2013-06-26 | 上海儒竞电子科技有限公司 | Control system of single-phase controllable rectifier |
| CN103178729B (en) * | 2011-12-22 | 2015-07-22 | 儒竞艾默生环境优化技术（上海）有限公司 | Control system of single-phase controllable rectifier |
| CN105763083A (en) * | 2014-12-30 | 2016-07-13 | 易安迪机车公司 | Head end power module having two inverters |
| CN105763083B (en) * | 2014-12-30 | 2020-11-27 | 前进轨道机车公司 | Head end power module with two inverters |
| CN106849678A (en) * | 2017-03-31 | 2017-06-13 | 中国科学院电工研究所 | The power regulating method of multi-inverter parallel inductive electric energy transmission system |
| CN106849678B (en) * | 2017-03-31 | 2019-03-08 | 中国科学院电工研究所 | The power regulating method of multi-inverter parallel inductive electric energy transmission system |
| CN110707941A (en) * | 2019-11-06 | 2020-01-17 | 湖南微网能源技术有限公司 | High-frequency high-power wave generation method |
| CN113985167A (en) * | 2021-10-20 | 2022-01-28 | 天水电气传动研究所集团有限公司 | Feedback type power aging test experimental system for high-power direct-current conversion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20161214 |