CN102074971B - Feedback load energy-saving circuit for aging test and control method thereof - Google Patents
Feedback load energy-saving circuit for aging test and control method thereof Download PDFInfo
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- CN102074971B CN102074971B CN 201010587120 CN201010587120A CN102074971B CN 102074971 B CN102074971 B CN 102074971B CN 201010587120 CN201010587120 CN 201010587120 CN 201010587120 A CN201010587120 A CN 201010587120A CN 102074971 B CN102074971 B CN 102074971B
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Abstract
The invention provides a feedback load energy-saving circuit for aging test and a control method thereof. The circuit comprises a first boost converting circuit and a second boost converting circuit which are connected with a power input end in parallel, a boost rectification circuit, an inner ring proportional-integral (PI) regulator and a DC/AC inverter circuit; the DC/AC inverter circuit mainly comprises four switch power tubes DRV1-DRV4; control electrodes of the four switch power tubes DRV1-DRV4 are connected with the inner ring PI regulator; and the four switch power tubes are controlled by sinusoidal pulse width modulation (SPWM) signals output by the control electrodes. Low-voltage large current in the circuit is subjected to DC input and high-voltage large current is subjected to AC output, and primary parallel connection of boost circuits, secondary parallel connection of boost transformers and a method that a pulse-width modulation (PWM) circuit works at a maximum duty circle are utilized, so that the conversion efficiency is improved. The decoupling of the boost circuit and an inverter are respectively controlled; when the input voltage of a secondary booster circuit is changed as required, the turn ratio of the transformer is only in need of changing correspondingly; and a part of hardware and software of the inverter is in no need of changes, and the expansibility is strong.
Description
Technical field
The present invention relates to the energy-saving electric product technology, especially relate to the general purpose type energy-saving aging testing system and the method that are 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.
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 constant for the load current that guarantees tested product, 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.
Summary of the invention
In order to solve the technical problem that exists in the prior art, the present invention proposes a kind of efficiently, the strong burn-in test of autgmentability is with feedback load energy-saving circuit and control method.
Booster circuit of the present invention 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 present invention realizes through adopting following technical scheme.
Implement the control method of a kind of burn-in test with feedback load energy-saving circuit, said method is based on the aging circuit that is provided with the prime load blocks, and the input of said prime load blocks connects the output of test product, and the present invention also has back level load blocks.
Said method comprises the steps:
1.; At first; Big current low voltage direct current output carrying out secondary DC boosting to the prime load blocks; It is elevated to more than the direct voltage 300V, adopts two groups of boost conversion circuits when boosting: first boost conversion circuit and second boost conversion circuit connect the pulse input end of two circuit the output of pulse generator;
2.; Again after the elementary parallel connection with pulse transformer T1 in first boost conversion circuit and the pulse transformer T2 in second boost conversion circuit; And then after the secondary serial connection mutually with the pulse transformer T2 in the pulse transformer T1 in first boost conversion circuit and second boost conversion circuit; Connect bridge rectifier again; Bridge rectifier 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.; Ring pi regulator in one is set; Insert the synthetic sinusoidal drive signals of being exported by the output of civil power phase-locked loop module and the busbar voltage control ring that is incorporated into the power networks of the given signal of fundamental current amplitude at an one of which input; At the access grid-connected current feedback signal of another input of interior ring pi regulator, interior ring pi regulator carries out Intelligent treatment to two signals, and produces the sinusoidal pulse width modulation signal;
4.; Next, high direct voltage Vbus is connect the power end of DC/AC inverter circuit, the control utmost point of four switching power tubes that constitute inverter is connected with interior ring pi regulator; Accept the control of its sinusoidal pulse width modulation signal, the DC/AC inverter circuit is to electrical network P1 output grid-connected current.
The included outer shroud pi regulator of the 3. described busbar voltage control ring that is incorporated into the power networks of step, outer shroud pi regulator input 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 are carried out Based Intelligent Control, the given signal of fundamental current amplitude of output.
A kind of burn-in test is with feedback load energy-saving circuit, and said circuit comprises:
One 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; Insert the synthetic sinusoidal drive signals of being exported by the output of civil power phase-locked loop module and the busbar voltage control ring that is incorporated into the power networks of the given signal of fundamental current amplitude at an one of which input; The access grid-connected current feedback signal of another input at interior ring pi regulator; Interior ring pi regulator carries out Intelligent treatment to two signals, and produces the sinusoidal pulse width modulation signal;
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 said first boost conversion circuit and second boost conversion circuit also meets output V back and the prime load blocks
DCINTConnect;
Said 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, receives 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 said pulse generator output fixed duty cycle.
Said 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, break off 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 invention 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 present invention is with V
DCINTBoost to higher direct voltage V
BUS, inverter is with V
BUSBe transformed into the alternating current recycle that is connected to the grid, to reach purpose of energy saving.
This patent has proposed a kind of direct current of low-voltage, high-current efficiently input, high-voltage alternating output circuit, and the method through the elementary parallel connection of booster circuit, the secondary series connection of step-up transformer has improved conversion efficiency.Adopt the method for open loop control simultaneously, pwm circuit has further improved conversion efficiency with maximum duty cycle work.
This patent has also proposed the control method of a kind of booster circuit and inverter decoupling zero; Both distinguish independent control, like this, and 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 present invention 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 present invention with inverter circuit in the feedback load energy-saving circuit;
Fig. 4 is the principle calcspar of a kind of burn-in test of the present invention with feedback load energy-saving circuit control method.
Embodiment
In order to further specify method of the present invention, combine a preferred embodiment of the present invention to be elaborated, yet said embodiment is merely the usefulness that furnishes an explanation and explain at present, can not be used for limiting scope of patent protection of the present invention.
Implement like the control method of Fig. 1～a kind of burn-in test shown in Figure 4 with feedback load energy-saving circuit; Said method is based on the aging circuit that is provided with prime load blocks 602; The input of said prime load blocks 602 connects the output of test product 601, and said method comprises the steps:
1.; At first; The secondary DC boosting is carried out in big current low voltage direct current output to prime load blocks 602, and it is elevated to more than the direct voltage 300V, adopts two groups of boost conversion circuits when boosting: first boost conversion circuit 82 and second boost conversion circuit 83; As shown in Figure 2, the pulse input end of two circuit is connected the output 85,86,87,88,852,862,872,882 of pulse generator 81;
2.; Again after the elementary parallel connection with the pulse transformer T2 in the pulse transformer T1 in first boost conversion circuit 82 and second boost conversion circuit 83; And then 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 again, 4 pin of T1 as shown in Figure 2 connect 3 pin of T2; Bridge rectifier is made up 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., like Fig. 3, shown in Figure 4, ring pi regulator 91 in is set;
At an one of which input; For example pin 92, insert the synthetic sinusoidal drive signals of being 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 of the given signal of fundamental current amplitude, at another input of 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, high direct voltage Vbus is connect the power end of DC/AC inverter circuit 95, the control utmost point of four switching power tubes that constitute inverter is connected 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, and carries out Based Intelligent Control, the given signal of fundamental current amplitude of output.
Manufacture and design a kind of burn-in test with feedback load energy-saving circuit according to said method, like Fig. 2, shown in Figure 3, said circuit comprises:
One 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;
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 said first boost conversion circuit 82 and second boost conversion circuit 83 also meets output V back and prime load blocks 602
DCINTConnect;
Said 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, receives 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 said pulse generator 81 output fixed duty cycles.
50% duty ratio for example is in the hope of obtaining maximal efficiency.
Said 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 is separated with electrical network P1; When line voltage or frequency are undesired, break off 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 up of D1～D4 after the secondary series connection of the secondary and T2 of T1.
The power access end of the present invention's 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.
Through 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.
In control; The method of this patent has proposed 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 by booster circuit control itself, and promptly inverter need not known the input voltage size of secondary booster circuit, and booster circuit also need not known the size of grid-connected current.Both do not need communication, only connect through Vbus.
Control ring comprises ring in an outer shroud and.
Outer shroud is a 385V busbar voltage ring, through 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 confirmed 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 confirmed by the turn ratio of transformer.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (5)
1. a burn-in test is with the control method of feedback load energy-saving circuit; Said method is based on the aging circuit that is provided with prime load blocks (602); The input of said prime load blocks (602) connects the output of test product (601); It is characterized in that said method comprises the steps:
1.; At first; Big current low voltage direct current output carrying out secondary DC boosting to prime load blocks (602); It is elevated to more than the direct voltage 300V, adopts two groups of boost conversion circuits when boosting: first boost conversion circuit (82) and second boost conversion circuit (83), the pulse input end of two circuit is received the output of pulse generator (81);
2.; Again after the elementary parallel connection with pulse transformer (T1) in first boost conversion circuit (82) and the pulse transformer (T2) in second boost conversion circuit (83); And then 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 again; Bridge rectifier 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.; Ring pi regulator (91) in one is set; Insert the synthetic sinusoidal drive signals of being 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 of the given signal of fundamental current amplitude at an one of which input; At the access grid-connected current feedback signal of another input of interior ring pi regulator (91), interior ring pi regulator (91) carries out Intelligent treatment to two signals, and produces the sinusoidal pulse width modulation signal;
4.; Next; High direct voltage Vbus is connect the power end of DC/AC inverter circuit (95); The control utmost point of four switching power tubes that constitute inverter is connected with interior ring pi regulator (91), accepts the control of its sinusoidal pulse width modulation signal, the DC/AC inverter circuit is to electrical network P1 output grid-connected current.
2. burn-in test according to claim 1 is with the control method of feedback load energy-saving circuit; It is characterized in that: 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) input 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.
3. a burn-in test is characterized in that with feedback load energy-saving circuit said circuit comprises:
One 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; Insert the synthetic sinusoidal drive signals of being 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 of the given signal of fundamental current amplitude at an one of which input; The access grid-connected current feedback signal of another input at interior ring pi regulator (91); Interior ring pi regulator (91) carries out Intelligent treatment to two signals, and produces the sinusoidal pulse width modulation signal;
One DC/AC inverter circuit (95);
The power access end of said 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;
Said 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); Receive 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.
According to claims 3 described burn-in tests with feedback load energy-saving circuit, it is characterized in that:
The control impuls of said pulse generator (81) output fixed duty cycle.
According to claims 3 described burn-in tests with feedback load energy-saving circuit, it is characterized in that:
Said 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, break off 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.
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| CN102891523B (en) * | 2012-10-16 | 2014-09-24 | 江苏玖宇实业有限公司 | Aging control method and system for electrical energy self-circulation type high-power charger |
| CN103399228B (en) * | 2013-07-30 | 2016-05-25 | 苏州汇川技术有限公司 | The total power burn in test circuit of current transformer or frequency converter |
| CN104375039B (en) * | 2014-11-21 | 2017-05-10 | 华北电力大学（保定） | Testing system for isolation type direct-current transformer |
| CN109444584A (en) * | 2018-11-09 | 2019-03-08 | 广州市微龙电子科技有限公司 | A kind of burn in test circuit of charging gun, device and method |
| CN111262439A (en) * | 2018-11-30 | 2020-06-09 | 英飞凌科技奥地利有限公司 | Power converter and method for assembling power converter |
| CN114046375B (en) * | 2020-04-10 | 2023-08-01 | 西南科技大学 | Electromagnetic valve power supply circuit and adjusting method thereof |
| CN116131618B (en) * | 2022-12-13 | 2024-04-19 | 深圳麦格米特电气股份有限公司 | Aging test device, method and system |
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| CN101166001A (en) * | 2006-10-16 | 2008-04-23 | 盈正豫顺电子股份有限公司 | Active bi-directional electric power adjuster |
| CN201414082Y (en) * | 2009-05-05 | 2010-02-24 | 冠捷投资有限公司 | Power supply |
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| JP2002101558A (en) * | 2000-09-26 | 2002-04-05 | Matsushita Electric Works Ltd | Electric power supply feeder and electric power supply feed system and method of support for electric power supply feed system |
| TWI371909B (en) * | 2007-12-28 | 2012-09-01 | Ind Tech Res Inst | Dc/ac reference modulation circuit with feedforward compensation scheme |
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| CN101166001A (en) * | 2006-10-16 | 2008-04-23 | 盈正豫顺电子股份有限公司 | Active bi-directional electric power adjuster |
| CN201414082Y (en) * | 2009-05-05 | 2010-02-24 | 冠捷投资有限公司 | Power supply |
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