CN201946978U - Circuit obtaining electricity from high-voltage direct-current bus - Google Patents
Circuit obtaining electricity from high-voltage direct-current bus Download PDFInfo
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- CN201946978U CN201946978U CN2010206846393U CN201020684639U CN201946978U CN 201946978 U CN201946978 U CN 201946978U CN 2010206846393 U CN2010206846393 U CN 2010206846393U CN 201020684639 U CN201020684639 U CN 201020684639U CN 201946978 U CN201946978 U CN 201946978U
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Abstract
The utility model relates to a circuit obtaining electricity from a high-voltage direct-current bus, which is technically characterized in that one end of a current-limiting resistor is connected with the anode of the high-voltage direct-current bus, the other end of the current-limiting resistor is connected with the cathode of the high-voltage direct-current bus after being connected with a series voltage-stabilizing tube group, a first output terminal of the series voltage-stabilizing tube group is connected with an input terminal of a buck chopping power unit, the first output terminal and a second output terminal of the series voltage-stabilizing tube group are connected on a driving pulse generating unit as working power supplies, and driving pulse generated by the driving pulse generating unit control the buck chopping power unit to convert input voltage into a needed stable voltage value. In the utility model, the output voltage is adjusted by changing the duty ratio of a chopper circuit under the condition that the output voltage of voltage-stabilizing tubes, and by adopting the series connection way of the voltage-stabilizing tubes, the output power of the circuit can be increased, and the loss of the current-limiting resistor can be reduced, so that the circuit solves the defects of the prior art, and has the characteristics of simple structure, low cost and reliable performance.
Description
Technical field
The utility model relates to the high voltage dc bus power-supply circuit, especially a kind of circuit from the high voltage dc bus power taking.
Background technology
At present, usually adopt voltage-stabiliser tube series limiting resistor mode to obtain from the high voltage dc bus power taking, as shown in Figure 1, the current-limiting resistance one termination high voltage dc bus positive pole of this power-supply circuit, another termination voltage-stabiliser tube negative electrode, the voltage-stabiliser tube anode connects the high voltage dc bus negative pole, uses for other power circuit from the direct power taking in voltage-stabiliser tube two ends.The problem that this power-supply circuit exists is: 1, the output voltage of voltage-stabiliser tube is fixed, and can not adjust it; 2, the power loss of current-limiting resistance is very big, and the loss of current-limiting resistance is along with the increase of the rising of DC bus-bar voltage and voltage-stabiliser tube power output and increase; 3, because voltage-stabiliser tube can not in parallelly be used, its peak power output depends on the power of single voltage-stabiliser tube generally speaking, brings certain limitation to practical application.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of power output height, Adjustable Output Voltage and current-limiting resistance loss the little circuit from the high voltage dc bus power taking.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of circuit from the high voltage dc bus power taking; comprise current-limiting resistance R1; the end of current-limiting resistance R1 connects high voltage dc bus positive pole (1); the described current-limiting resistance R1 other end connects series connection voltage-stabiliser tube group (2) back and is connected with high voltage dc bus negative pole (3); first output of this series connection voltage-stabiliser tube group (2) is connected with the input of buck chopper power cell (5); first output and second output of series connection voltage-stabiliser tube group (2) are connected on the driving pulse generating unit (4) as working power; the driving pulse control buck chopper power cell (5) that this driving pulse generating unit (4) produces is converted to needed stable voltage with input voltage, connects an Overvoltage protecting unit (6) between driving pulse generating unit (4) and buck chopper power cell (5).
And, the circuit of described driving pulse generating unit (4) is: the anode of inverter U1 output termination charging diode D2, the negative electrode of charging diode D2 links to each other with charging resistor R5, the other end of charging resistor R5 links to each other with charge and discharge capacitance C1, the other end of charge and discharge capacitance C1 links to each other with second output of series connection voltage-stabiliser tube group (2), diode D1 is connected in parallel on the two ends of charge and discharge capacitance C1, the anode of diode D1 connects second output of series connection voltage-stabiliser tube group (2), the negative electrode of diode D1 is connected to the input of inverter U1 by resistance R 4, discharge diode D3, discharge resistance R6 series connection back and charging diode D2, charging resistor R5 parallel connection, the negative electrode of discharge diode D3 links to each other with the anode of charging diode D2.
And the circuit of described Overvoltage protecting unit (6) is: the collector electrode of triode V2, base stage, emitter are connected with resistance R 7, resistance R 8, resistance R 9 respectively, the other end of resistance R 9 respectively with resistance R 10, overvoltage reference data voltage-stabiliser tube VS
N+1Negative electrode links to each other, overvoltage reference data voltage-stabiliser tube VS
N+1Anode connects high voltage dc bus negative pole (3), and the other end of resistance R 10 links to each other with second output of series connection voltage-stabiliser tube group (2).
And the circuit of described buck chopper power cell (5) is: power switch pipe V1, energy storage inductor L1, output filter capacitor C2 and sustained diode 4 are connected successively, and last sustained diode 4 is connected to the common point of power switch pipe V1 and energy storage inductor L1.
Advantage of the present utility model and good effect are:
The utility model is reasonable in design, by increasing buck chopper power cell, driving pulse generating unit and Overvoltage protecting unit, under the constant situation of voltage-stabiliser tube output voltage, recently adjust output voltage by the driving pulse duty that changes the driving pulse generating unit; Adopt the mode of voltage-stabiliser tube series connection, can improve the peak power output of circuit, power output is directly proportional with the number of the voltage-stabiliser tube of connecting; Adopt the mode of voltage-stabiliser tube series connection under the certain situation of power output, can reduce the electric current of current-limiting resistance of flowing through, thereby reduce the power consumption of current-limiting resistance, the power consumption of current-limiting resistance is inversely proportional to the voltage-stabiliser tube number of connecting.The utility model has solved the deficiencies in the prior art, has the output over-voltage protection function simultaneously, has characteristics simple in structure, with low cost, dependable performance.
Description of drawings
Fig. 1 is the circuit theory diagrams of existing voltage-stabiliser tube series limiting resistor from the high voltage dc bus power taking;
Fig. 2 is circuit theory diagrams of the present utility model:
Among the figure: 1-high voltage dc bus positive pole, 2-series connection voltage-stabiliser tube group, 3-high voltage dc bus negative pole, 4-driving pulse generating unit, 5-buck chopper power cell, 6-Overvoltage protecting unit, VS1～VS
N+1-voltage-stabiliser tube, R1～R10-resistance, C1, C2-electric capacity, V1-power switch pipe, V2-triode, D1～D4-diode, L1-inductance, U1-inverter.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
A kind of circuit from the high voltage dc bus power taking, as shown in Figure 2, comprise current-limiting resistance R1, series connection voltage-stabiliser tube group (2), buck chopper power cell (5), driving pulse generating unit (4) and Overvoltage protecting unit (6), after current-limiting resistance R1 and series connection voltage-stabiliser tube group (2) series connection and at dc bus (1) and (3) two ends, the first output P1 of series connection voltage-stabiliser tube group (2) is as the input of buck chopper power cell (5); Voltage-stabiliser tube VS1 two ends P1 in the series connection voltage-stabiliser tube group (2) and P2 are tapped into the inverter U1 in the driving pulse generating unit (4), for driving pulse generating unit (4) provides working power; Resistance R 3 in the driving pulse generating unit (4) and the control of the power switch pipe V1 of buck chopper power cell (5) extremely link to each other, and control it and open and close, and are used for adjustment, control output voltage; Capacitor C 1 one ends in the driving pulse generating unit (4) and the resistance R 7 of Overvoltage protecting unit (6) link to each other; resistance R 8 in the Overvoltage protecting unit (6) links to each other with the output of buck chopper power cell (5); the overvoltage that is used for overvoltage crowbar detects the voltage-stabiliser tube VS in the Overvoltage protecting unit (6)
N+1Be used to set the overvoltage protection threshold.The utility model is compared with existing power-supply circuit, has increased buck chopper power cell (5), driving pulse generating unit (4) and Overvoltage protecting unit (6), recently adjusts output voltage by the duty that changes power switch pipe V1 driving pulse; Adopt the mode of voltage-stabiliser tube series connection, can improve the peak power output of circuit, power output is directly proportional with the number of the voltage-stabiliser tube of connecting; Adopt the mode of voltage-stabiliser tube series connection under the certain situation of power output, can reduce the electric current of current-limiting resistance of flowing through, thereby reduce the power consumption of current-limiting resistance, the power consumption of current-limiting resistance is inversely proportional to the voltage-stabiliser tube number of connecting.
The physical circuit of driving pulse generating unit (4) is: the anode of inverter U1 output termination charging diode D2, the negative electrode of charging diode D2 links to each other with charging resistor R5, the other end of charging resistor R5 links to each other with charge and discharge capacitance C1, the other end of charge and discharge capacitance C1 links to each other with second output of series connection voltage-stabiliser tube group (2), diode D1 is connected in parallel on the two ends of charge and discharge capacitance C1, the anode of diode D1 connects second output of series connection voltage-stabiliser tube group (2), the negative electrode of diode D1 is connected to the input of inverter U1 by resistance R 4, discharge diode D3, discharge resistance R6 series connection back and charging diode D2, charging resistor R5 parallel connection, the negative electrode of discharge diode D3 links to each other with the anode of charging diode D2.The duty ratio of the ratio decision driving pulse of charging resistor R5 in the driving pulse generating unit (4) and the resistance of discharge resistance R6, charge and discharge capacitance C1, charging resistor R5 and discharge resistance R6 determine the frequency of driving pulse jointly.
The physical circuit of buck chopper power cell (5) is: power switch pipe V1, energy storage inductor L1, output filter capacitor C2 and sustained diode 4 are connected successively, and last sustained diode 4 is connected to the common point of power switch pipe V1 and energy storage inductor L1.This buck chopper power cell is the buck circuit of standard, and the output voltage of polyphone voltage-stabiliser tube group (2) is as the input voltage of buck chopper power cell.
The physical circuit of Overvoltage protecting unit (6) is: the base stage of triode V2 links to each other with resistance R 8; the collector electrode of triode V2 links to each other with resistance R 7; the emitter of triode V2 links to each other with resistance R 9, the other end of resistance R 9 respectively with resistance R 10, overvoltage reference data voltage-stabiliser tube VS
N+1Negative electrode links to each other, voltage-stabiliser tube VS
N+1Anode connects high voltage dc bus negative pole (3), and the other end of resistance R 10 links to each other with the output P2 of series connection voltage-stabiliser tube group (2).The effect of this Overvoltage protecting unit is: when buck chopper power cell (5) output voltage is higher than overvoltage reference data voltage-stabiliser tube VS
N+1Voltage the time, the velocity of discharge of charge and discharge capacitance is accelerated in triode V2 conducting, inverter U1 is sent in advance turn-off pulse power switch pipe V1 is turn-offed, and reduces output voltage, reaches the purpose of overvoltage protection.
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other execution modes that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (5)
1. circuit from the high voltage dc bus power taking, comprise current-limiting resistance R1, the end of current-limiting resistance R1 connects high voltage dc bus positive pole (1), it is characterized in that: the described current-limiting resistance R1 other end connects series connection voltage-stabiliser tube group (2) back and is connected with high voltage dc bus negative pole (3), first output of this series connection voltage-stabiliser tube group (2) is connected with the input of buck chopper power cell (5), first output and second output of series connection voltage-stabiliser tube group (2) are connected on the driving pulse generating unit (4) as working power, and the driving pulse control buck chopper power cell (5) that this driving pulse generating unit (4) produces is converted to needed stable voltage with input voltage.
2. a kind of circuit from the high voltage dc bus power taking according to claim 1 is characterized in that: connect an Overvoltage protecting unit (6) between driving pulse generating unit (4) and buck chopper power cell (5).
3. a kind of circuit according to claim 1 and 2 from the high voltage dc bus power taking, it is characterized in that: the circuit of described driving pulse generating unit (4) is: the anode of inverter U1 output termination charging diode D2, the negative electrode of charging diode D2 links to each other with charging resistor R5, the other end of charging resistor R5 links to each other with charge and discharge capacitance C1, the other end of charge and discharge capacitance C1 links to each other with second output of series connection voltage-stabiliser tube group (2), diode D1 is connected in parallel on the two ends of charge and discharge capacitance C1, the anode of diode D1 connects second output of series connection voltage-stabiliser tube group (2), the negative electrode of diode D1 is connected to the input of inverter U1 by resistance R 4, discharge diode D3, discharge resistance R6 series connection back and charging diode D2, charging resistor R5 parallel connection, the negative electrode of discharge diode D3 links to each other with the anode of charging diode D2.
4. a kind of circuit according to claim 1 and 2 from the high voltage dc bus power taking; it is characterized in that: the circuit of described Overvoltage protecting unit (6) is: the collector electrode of triode V2, base stage, emitter are connected with resistance R 7, resistance R 8, resistance R 9 respectively, the other end of resistance R 9 respectively with resistance R 10, overvoltage reference data voltage-stabiliser tube VS
N+1Negative electrode links to each other, overvoltage reference data voltage-stabiliser tube VS
N+1Anode connects high voltage dc bus negative pole (3), and the other end of resistance R 10 links to each other with second output of series connection voltage-stabiliser tube group (2).
5. a kind of circuit according to claim 1 and 2 from the high voltage dc bus power taking, it is characterized in that: the circuit of described buck chopper power cell (5) is: power switch pipe V1, energy storage inductor L1, output filter capacitor C2 and sustained diode 4 are connected successively, and last sustained diode 4 is connected to the common point of power switch pipe V1 and energy storage inductor L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846393U CN201946978U (en) | 2010-12-28 | 2010-12-28 | Circuit obtaining electricity from high-voltage direct-current bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846393U CN201946978U (en) | 2010-12-28 | 2010-12-28 | Circuit obtaining electricity from high-voltage direct-current bus |
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| Publication Number | Publication Date |
|---|---|
| CN201946978U true CN201946978U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206846393U Expired - Lifetime CN201946978U (en) | 2010-12-28 | 2010-12-28 | Circuit obtaining electricity from high-voltage direct-current bus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545688A (en) * | 2011-12-12 | 2012-07-04 | 中国电力科学研究院 | Power pulse generation device, drive method, and high-voltage wire electricity getting method |
| CN109193971A (en) * | 2018-10-25 | 2019-01-11 | 叶宝华 | Energy storage pulser |
| CN110718943A (en) * | 2018-07-12 | 2020-01-21 | 株洲中车时代电气股份有限公司 | Capacitor charging device and control method thereof |
| WO2021068363A1 (en) * | 2019-10-12 | 2021-04-15 | 中车永济电机有限公司 | High-voltage protection system for internal combustion locomotive |
| CN114444425A (en) * | 2022-04-07 | 2022-05-06 | 安徽威灵汽车部件有限公司 | Parameter determination method for discharge resistance between direct current buses and related device |
-
2010
- 2010-12-28 CN CN2010206846393U patent/CN201946978U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545688A (en) * | 2011-12-12 | 2012-07-04 | 中国电力科学研究院 | Power pulse generation device, drive method, and high-voltage wire electricity getting method |
| CN102545688B (en) * | 2011-12-12 | 2015-04-01 | 中国电力科学研究院 | Power pulse generation device, drive method, and high-voltage wire electricity getting method |
| CN110718943A (en) * | 2018-07-12 | 2020-01-21 | 株洲中车时代电气股份有限公司 | Capacitor charging device and control method thereof |
| CN110718943B (en) * | 2018-07-12 | 2023-10-03 | 株洲中车时代电气股份有限公司 | Capacitor charging device and control method thereof |
| CN109193971A (en) * | 2018-10-25 | 2019-01-11 | 叶宝华 | Energy storage pulser |
| WO2021068363A1 (en) * | 2019-10-12 | 2021-04-15 | 中车永济电机有限公司 | High-voltage protection system for internal combustion locomotive |
| CN114444425A (en) * | 2022-04-07 | 2022-05-06 | 安徽威灵汽车部件有限公司 | Parameter determination method for discharge resistance between direct current buses and related device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |