CN102709992A - High-frequency chopping boost charging circuit - Google Patents
High-frequency chopping boost charging circuit Download PDFInfo
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- CN102709992A CN102709992A CN2012101501376A CN201210150137A CN102709992A CN 102709992 A CN102709992 A CN 102709992A CN 2012101501376 A CN2012101501376 A CN 2012101501376A CN 201210150137 A CN201210150137 A CN 201210150137A CN 102709992 A CN102709992 A CN 102709992A
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Abstract
The invention discloses a high-frequency chopping boost charging circuit, comprising a three-phase transformer T1 in delta connection and a three-phase transformer T2 in star connection, wherein the primary sides of the three-phase transformer T1 and three-phase transformer T2 are connected with the same three-phase alternating-current power supply; the output lines of the secondary sides are respectively provided with a high-frequency chopping boosting circuit AC/AC; the output end of the high-frequency chopping boosting circuit AC/AC is connected with a three-phase rectifier bridge AC/DC; and the output ends of the three-phase rectifier are connected in parallel to form a terminal of the load. As a major loop is not provided with a switch device, the ratio of primary winding number to secondary winding number of the chopping boosting circuit is 1:N; the feedback current of the secondary circuit connected in the major loop in series is primary 1/N; and the power loss of the secondary circuit is 1/(N*N), thus the loss of the major loop under large current can be greatly reduced, and the efficiency is improved. By voltage superposition of the chopping circuit and the major loop, the proper major loop voltage can be selected, so that when the circuit is in fault, the voltage of the major loop is lower than the charging voltage of the battery to protect the battery from damage; and with the adoption of a multi-pulse wave output way, influence of harmonic wave on the grid voltage can be reduced and the quality of the grid is improved.
Description
Technical field
The present invention relates to a kind of power supply, particularly a kind of charge power supply that electric automobile etc. is charged of can be used for.
Background technology
Existing charging circuit is as shown in Figure 3, and it mainly adopts rectification, PFC, semi-bridge alternation, filtering output to add the mode of feedback regulation, current stabilization, adopts PFC to improve power factor, has reduced idle power consumption, and semi-bridge alternation has reduced cost.But the diode turn-off power loss is bigger in the pfc circuit, the loss of translation circuit switching tube, the loss of high frequency transformer, the loss of output synchronous rectification.The efficient of the whole power supply of this scheme has only about 90%.Circuit causes damage to battery when overcurrent, overvoltage fault occurring easily.
Summary of the invention
In order to overcome the deficiency of prior art, the present invention provides a kind of ripple that reduces circuit loss and circuit output, strengthens the high frequency chopping booster circuit to the fail safe of rechargeable battery.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of high frequency chopping boost charge circuit; Comprise the three-phase transformer T1 of delta connection and the three-phase transformer T2 of star connection; The same three-phase alternating-current supply of former edge joint of said three-phase transformer T1 and three-phase transformer T2; Be provided with high frequency chopping booster circuit AC/AC on the outlet line of secondary; The control signal PWM of said high frequency chopping booster circuit AC/AC is from separately circuit, and the output termination three-phase commutation bridge AC/DC of said high frequency chopping booster circuit AC/AC forms the terminals of load after the output parallel connection of said three-phase commutation bridge.
The present invention adopts isolation type high frequency copped wave and many pulse waves way of output, and its beneficial effect is following:
(1), the secondary of chopper circuit be serially connected in the major loop, the major loop of charging circuit does not have switching device like this, has improved the reliability of circuit, in the major loop of big electric current, does not have switching device, has reduced switching loss yet.
(2), major loop still is operated in power frequency, do not have high-frequency loss, improved efficient.
(3), through the stack of chopper circuit and main circuit voltage, selects suitable main circuit voltage, in the time of can guaranteeing fault, main circuit voltage is lower than the charging voltage of battery, thereby the protection battery is avoided damaging.
(4), many pulse waves way of output, can reduce the influence of harmonic wave to line voltage, improve the quality of electrical network.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is high frequency chopping booster circuit figure;
Fig. 3 is the charging circuit functional-block diagram of background technology.
Embodiment
With reference to Fig. 1, Fig. 2; A kind of high frequency chopping boost charge circuit; Comprise the three-phase transformer T1 of delta connection and the three-phase transformer T2 of star connection; The same three-phase 380V of the former edge joint AC power of said three-phase transformer T1 and three-phase transformer T2 is provided with high frequency chopping booster circuit AC/AC on the 36V outlet line of secondary, the control signal PWM of said high frequency chopping booster circuit AC/AC is from separately circuit; The output termination three-phase commutation bridge AC/DC of said high frequency chopping booster circuit AC/AC, the terminals of formation load L after the output parallel connection of said three-phase commutation bridge.
30 degree of phasic difference mutually of transformer T2 delta connection and three-phase transformer T2 star connection carry out parallel connection after the rectification, form the output of 6 pulse waves, have reduced the ripple size of output.
380V voltage through the high frequency chopping booster circuit, arrives the size that needs with voltage or Current Control after the three-phase transformer transformation.At output voltage U and electric current I are sampled, be sent to controller control output PWM, reach the purpose of voltage stabilizing or current stabilization.
The lithium battery group voltage of electric automobile is 48V, can use 15 joint single lithium battery to connect, generally speaking; Single battery voltage can normally use between 2.5V-3.75V; Just the voltage range of battery pack is 37.5V-56.25V, for guaranteeing the fail safe of charger to batteries charging, when copped wave booster circuit fault; No longer to battery charge; Just charging voltage is lower than the minimum voltage 37.5V of battery pack, and can set the charger minimum output voltage like this is 36V, guarantees the security reliability of battery pack.
When output voltage was minimum 36V, high-frequency chopper was not worked, and the transformer T3 of major loop medium-high frequency chopper circuit secondary is equivalent to an inductance.Relation according to voltage before and after the rectification; Then the secondary voltage U of three-phase transformer is
; This road secondary voltage has guaranteed the same frequency homophase of major loop and high-frequency chopper simultaneously also for high-frequency chopper provides input source.If the elementary and secondary turn ratio of high-frequency chopper transformer T3 is 1:N; The duty ratio of the PWM of controller control Q5, Q6 is D; Then through the be added to voltage
of major loop of chopper circuit; Voltage before then every commutating phase is superposed to
; Then output voltage is
after the rectification; Select suitable turn ratio N; Through adjustment duty ratio D; Can change output voltage and electric current, add that feedback circuit can regulated output voltage and electric current.
Charging circuit of the present invention adopts isolation type high frequency copped wave and many pulse waves way of output, and its advantage is following:
(1), the secondary of chopper circuit be serially connected in the major loop, the major loop of charging circuit does not have switching device like this, has improved the reliability of circuit, in the major loop of big electric current, does not have switching device, has reduced switching loss yet.
(2), major loop still is operated in power frequency, do not have high-frequency loss, improved efficient.
(3), through the stack of chopper circuit and main circuit voltage, selects suitable main circuit voltage, in the time of can guaranteeing fault, main circuit voltage is lower than the charging voltage of battery, thereby the protection battery is avoided damaging.
(4), many pulse waves way of output, can reduce the influence of harmonic wave to line voltage, improve the quality of electrical network.
Claims (1)
1. high frequency chopping boost charge circuit; It is characterized in that comprising the three-phase transformer T1 of delta connection and the three-phase transformer T2 of star connection; The same three-phase alternating-current supply of former edge joint of said three-phase transformer T1 and three-phase transformer T2; Be provided with high frequency chopping booster circuit AC/AC on the outlet line of secondary, the output termination three-phase commutation bridge AC/DC of said high frequency chopping booster circuit AC/AC, the terminals of formation load after the output parallel connection of said three-phase commutation bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101501376A CN102709992A (en) | 2012-05-16 | 2012-05-16 | High-frequency chopping boost charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101501376A CN102709992A (en) | 2012-05-16 | 2012-05-16 | High-frequency chopping boost charging circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102709992A true CN102709992A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101501376A Pending CN102709992A (en) | 2012-05-16 | 2012-05-16 | High-frequency chopping boost charging circuit |
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| CN (1) | CN102709992A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113538882A (en) * | 2021-07-16 | 2021-10-22 | 上海爻火微电子有限公司 | Signal transmission circuit and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123361A (en) * | 2006-08-08 | 2008-02-13 | 京都电机器株式会社 | Battery charging device |
| US20080174276A1 (en) * | 2007-01-19 | 2008-07-24 | Fumikazu Takahashi | Switching power supply |
| CN201994709U (en) * | 2011-03-29 | 2011-09-28 | 咸阳通普材料连接与改性技术有限公司 | Alternating current (AC) chopping frequency-conversion charging circuit |
| CN202712938U (en) * | 2012-05-16 | 2013-01-30 | 中山普润斯电源设备技术有限公司 | High frequency chopping boost charging circuit |
-
2012
- 2012-05-16 CN CN2012101501376A patent/CN102709992A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123361A (en) * | 2006-08-08 | 2008-02-13 | 京都电机器株式会社 | Battery charging device |
| US20080174276A1 (en) * | 2007-01-19 | 2008-07-24 | Fumikazu Takahashi | Switching power supply |
| CN201994709U (en) * | 2011-03-29 | 2011-09-28 | 咸阳通普材料连接与改性技术有限公司 | Alternating current (AC) chopping frequency-conversion charging circuit |
| CN202712938U (en) * | 2012-05-16 | 2013-01-30 | 中山普润斯电源设备技术有限公司 | High frequency chopping boost charging circuit |
Non-Patent Citations (1)
| Title |
|---|
| 孟凡刚等: "多脉波整流技术综述", 《电力自动化设备》, vol. 32, no. 2, 29 February 2012 (2012-02-29) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113538882A (en) * | 2021-07-16 | 2021-10-22 | 上海爻火微电子有限公司 | Signal transmission circuit and electronic equipment |
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Application publication date: 20121003 |