CN204615637U - Electrochemical capacitor pre-charge circuit - Google Patents
Electrochemical capacitor pre-charge circuit Download PDFInfo
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- CN204615637U CN204615637U CN201420867364.5U CN201420867364U CN204615637U CN 204615637 U CN204615637 U CN 204615637U CN 201420867364 U CN201420867364 U CN 201420867364U CN 204615637 U CN204615637 U CN 204615637U
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Abstract
The utility model provides a kind of electrochemical capacitor pre-charge circuit, comprising: three-phase bridge rectifier circuit, for three-phase alternating current is converted into direct current; Electrochemical capacitor charging circuit, for the charging of electrochemical capacitor and the precharge of circuit; Control unit circuit, for monitoring electrochemical capacitor both end voltage and transmission precharge settling signal; Switching circuit, be made up of controllable silicon and charging resistor, described controllable silicon is in parallel with described charging resistor, after powering on, described direct current first flows through from described charging resistor, the described thyristor gating circuit work when described switching circuit two ends reach certain voltage, described controlled silicon conducting, described charging resistor short circuit.Utilize the utility model to reach after circuit powers on and automatically carry out circuit voltage detection, guarantee just to start charging resistor short circuit when voltage allows, namely after meeting preliminary filling requirement, trigger controlled silicon conducting, make whole circuit performance safety and reliability, longer service life.
Description
Technical field
The utility model relates to the pre-charge circuit in power domain, particularly relates to a kind of electrochemical capacitor pre-charge circuit.
Background technology
Traditional pre-charge circuit adopts charging resistor to add the mode of A.C. contactor, namely at the pair of contact both sides charged in parallel resistance of A.C. contactor, forms RC charging circuit with electrochemical capacitor; First flow through from charging resistor, again by relay adhesive after a period of time after circuit powers on.The shortcoming of this circuit is: when electric capacity is short-circuited or Converting Unit does not power on as IGBT short circuit causes electric capacity two ends to fill, and then relay contact can be burnt through closed A.C. contactor after a while; And A.C. contactor long-term action, contact is very short for useful life.
Utility model content
The utility model is intended at least solve one of Problems existing in background technology.
For this reason, the purpose of this utility model is to provide a kind of electrochemical capacitor pre-charge circuit, utilizes the utility model to solve after circuit powers on automatically to carry out circuit voltage detection, guarantees the problem just started when voltage allows charging resistor short circuit.
The utility model provides a kind of electrochemical capacitor pre-charge circuit, comprising:
Three-phase bridge rectifier circuit, for being converted into direct current by three-phase alternating current; Electrochemical capacitor charging circuit, for the charging of electrochemical capacitor and the precharge of circuit; Control unit circuit, for monitoring electrochemical capacitor both end voltage and transmission precharge settling signal; Switching circuit, be made up of controllable silicon VD7 and charging resistor R5, described controllable silicon VD7 is in parallel with described charging resistor R5, and described switching circuit one end is connected with described three-phase bridge rectifier circuit, and the other end is connected to the node between described electrochemical capacitor charging circuit and control circuit anode interface; After powering on, described direct current first flows through from described charging resistor R5, the described controllable silicon VD7 circuits for triggering work when described switching circuit two ends reach certain voltage, described controllable silicon VD7 conducting, described charging resistor R5 short circuit, and send precharge settling signal; Described controllable silicon VD7 is connected with described control unit circuit.
Further, described three-phase bridge rectifier circuit is made up of rectifier diode VD 1, VD 2, VD 3, VD 4, VD 5, VD6; Described three-phase bridge rectifier circuit one end is connected with described switching circuit, and the other end is connected to the node between described electrochemical capacitor charging circuit and described control unit circuit negative pole interface.
Further, described electrochemical capacitor charging circuit is made up of electrochemical capacitor C1, C2, C3, C4 and resistance R1, R2, R3, R4, after electrochemical capacitor C1, C2 are in parallel with resistance R1, R2, and the circuit connected in series after in parallel with resistance R3, R4 with electrochemical capacitor C3, C4; Described electrochemical capacitor charging circuit one end is connected to the node between described switching circuit and described control unit circuit anode interface, and the other end is connected to the node between described three-phase bridge rectifier circuit and described control unit circuit.
Further, described control unit circuit is made up of single-chip microcomputer, resistance R6, R7, R8, triode V1, V2, transformer T1 and rectifier diode VD 8, VD 9, VD 10, VD 11; Described control unit circuit is connected with described controllable silicon VD7 by resistance R6, R7, the node between described switching circuit and described electrochemical capacitor charging circuit is connected to, by the node described in negative pole interface between electrochemical capacitor charging circuit and described three-phase bridge rectifier circuit by anode interface.
The beneficial effects of the utility model are, a kind of electrochemical capacitor pre-charge circuit is provided, utilize the utility model to reach after circuit powers on and automatically carry out circuit voltage detection, guarantee just to start charging resistor short circuit when voltage allows, namely after meeting preliminary filling requirement, controlled silicon conducting is triggered, make whole circuit performance safety and reliability, longer service life.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment electrochemical capacitor pre-charge circuit;
Fig. 2 is the circuit diagram of control unit circuit in the utility model embodiment.
Embodiment
Hereafter will describe the utility model specific embodiment in detail in conjunction with concrete accompanying drawing.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they can mutually be combined thus be reached better technique effect.In the accompanying drawing of following embodiment, the identical label that each accompanying drawing occurs represents identical feature or parts, can be applicable in different embodiment.
Fig. 1 is the circuit diagram of the utility model embodiment electrochemical capacitor pre-charge circuit.
The utility model embodiment provides a kind of electrochemical capacitor pre-charge circuit, comprising:
Three-phase bridge rectifier circuit 1, for being converted into direct current by three-phase alternating current; Electrochemical capacitor charging circuit 2, for the charging of electrochemical capacitor and the precharge of circuit; Control unit circuit 3, for monitoring electrochemical capacitor both end voltage and transmission precharge settling signal; Switching circuit 4, be made up of controllable silicon VD7 and charging resistor R5, described controllable silicon VD7 is in parallel with described charging resistor R5, described switching circuit 4 one end is connected with described three-phase bridge rectifier circuit 1, and the other end is connected to the node between described electrochemical capacitor charging circuit 2 and control circuit anode interface; After powering on, described direct current first flows through from described charging resistor R5, the described controllable silicon VD7 circuits for triggering work when described switching circuit 4 two ends reach certain voltage, and described controllable silicon VD7 conducting, described charging resistor R5 short circuit; Described controllable silicon VD7 is connected with described control unit circuit 3.
In the utility model embodiment, described three-phase bridge rectifier circuit 1 is made up of rectifier diode VD 1, VD 2, VD 3, VD 4, VD 5, VD6; Described three-phase bridge rectifier circuit 1 one end is connected with described switching circuit 4, and the other end is connected to the node between described electrochemical capacitor charging circuit 2 and described control unit circuit 3 negative pole interface.
In the utility model embodiment, described electrochemical capacitor charging circuit 2 is made up of electrochemical capacitor C1, C2, C3, C4 and resistance R1, R2, R3, R4, after electrochemical capacitor C1, C2 are in parallel with resistance R1, R2, the circuit connected in series after in parallel with resistance R3, R4 with electrochemical capacitor C3, C4; Described electrochemical capacitor charging circuit 2 one end is connected to the node between described switching circuit 4 and described control unit circuit 3 anode interface, and the other end is connected to the node between described three-phase bridge rectifier circuit 1 and described control unit circuit 3.
In the utility model embodiment, described control unit circuit 3 is made up of single-chip microcomputer, resistance R6, R7, R8 triode V1, V2, transformer T1 and rectifier diode VD 8, VD9, VD10, VD 11.
Described single-chip microcomputer is PIC16F877 single-chip microcomputer; Described single-chip microcomputer is by the mode of described electrochemical capacitor charging circuit 2 both end voltage by electric resistance partial pressure, DC high voltage is converted to the low-voltage required for signal transacting, direct feeding Chip Microcomputer A N0 analog input port, send the high frequency start pulse signal required for controllable silicon according to voltage levels, exported by single-chip microcomputer RC2 pin; Described control machines and power amplification and voltage are isolated, and form push-pull type and promote circuit, signal is amplified by complementary triode, arranging through transformer isolation, diode bridge, become the triggering signal that controllable silicon needs; Precharge settling signal is exported by single-chip microcomputer RC3 pin, and after precharge completes, the reversion of this pin level, exports high level.
Described control unit circuit 3 is connected with described controllable silicon VD7 by resistance R6, R7, the other end of resistance R6 connects described Chip Microcomputer A N0/NA0 interface, the other end of resistance R7 is connected to the node between resistance R6 and described Chip Microcomputer A N0/NA0 interface, one end of described single-chip microcomputer RC2/CCP1 interface contact resistance R8, the other end of resistance R8 connects and forms push-pull type promotion circuit by complementary triode V1, V2
Form push-pull type by complementary triode V1, V2 and promote circuit other end connection transformer T1, the transformer T1 other end connects diode bridge rectifier circuit; Described control unit circuit 3 is connected to the node between described switching circuit 4 and described electrochemical capacitor charging circuit 2 by anode interface, by the node described in negative pole interface between electrochemical capacitor charging circuit 2 and described three-phase bridge rectifier circuit 1.
The operation principle of the utility model embodiment is the following stated:
Three phase mains passes through three-phase bridge rectifier circuit 1 after connecting, three-phase alternating current is become direct current, direct current first flows through from charging resistor R5, charged to electrochemical capacitor by resistance again, control unit voltage monitoring part monitoring electrochemical capacitor both end voltage, the thyristor gating circuit work when reaching certain voltage, controlled silicon conducting, charging resistor R5 short circuit, and send precharge settling signal; Described single-chip microcomputer is by the mode of described electrochemical capacitor charging circuit 2 both end voltage by electric resistance partial pressure, DC high voltage is converted to the low-voltage required for signal transacting, direct feeding Chip Microcomputer A N0 analog input port, send the high frequency start pulse signal required for controllable silicon according to voltage levels, exported by single-chip microcomputer RC2 pin; Described control machines and power amplification and voltage are isolated, and form push-pull type and promote circuit, signal is amplified by complementary triode, arranging through transformer isolation, diode bridge, become the triggering signal that controllable silicon needs; Precharge settling signal is exported by single-chip microcomputer RC3 pin, and after precharge completes, the reversion of this pin level, exports high level.In whole process, monitor electrochemical capacitor both end voltage, there is the situation that big current burns in controlled silicon conducting when preventing electrochemical capacitor brownout simultaneously.
The utility model provides a kind of electrochemical capacitor pre-charge circuit, utilize the utility model to reach after circuit powers on and automatically carry out circuit voltage detection, guarantee just to start charging resistor short circuit when voltage allows, namely after meeting preliminary filling requirement, controlled silicon conducting is triggered, make whole circuit performance safety and reliability, longer service life.
Although given embodiments more of the present utility model, it will be understood by those of skill in the art that when not departing from the utility model spirit herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of the utility model interest field.
Claims (4)
1. an electrochemical capacitor pre-charge circuit, is characterized in that, comprising:
Three-phase bridge rectifier circuit (1), for being converted into direct current by three-phase alternating current;
Electrochemical capacitor charging circuit (2), for the charging of electrochemical capacitor and the precharge of circuit;
Control unit circuit (3), for monitoring electrochemical capacitor both end voltage;
Switching circuit (4), be made up of controllable silicon VD7 and charging resistor R5, described controllable silicon VD7 is in parallel with described charging resistor R5, described switching circuit one end is connected with described three-phase bridge rectifier circuit, and the other end is connected to the node between described electrochemical capacitor charging circuit and control circuit anode interface; Described controllable silicon VD7 is connected with described control unit circuit; After powering on, described direct current first flows through from described charging resistor R5, the described controllable silicon VD7 circuits for triggering work when described switching circuit two ends reach certain voltage, described controllable silicon VD7 conducting, described charging resistor R5 short circuit, and send precharge settling signal.
2. electrochemical capacitor pre-charge circuit as claimed in claim 1, it is characterized in that, described three-phase bridge rectifier circuit is made up of rectifier diode VD1, VD2, VD3, VD4, VD5, VD6; Described three-phase bridge rectifier circuit one end is connected with described switching circuit, and the other end is connected to the node between described electrochemical capacitor charging circuit and described control unit circuit negative pole interface.
3. electrochemical capacitor pre-charge circuit as claimed in claim 1, it is characterized in that, described electrochemical capacitor charging circuit is made up of electrochemical capacitor C1, C2, C3, C4 and resistance R1, R2, R3, R4, after electrochemical capacitor C1, C2 are in parallel with resistance R1, R2, the circuit connected in series after in parallel with resistance R3, R4 with electrochemical capacitor C3, C4; Described electrochemical capacitor charging circuit one end is connected to the node between described switching circuit and described control unit circuit anode interface, and the other end is connected to the node between described three-phase bridge rectifier circuit and described control unit circuit.
4. electrochemical capacitor pre-charge circuit as claimed in claim 1, it is characterized in that, described control unit circuit is made up of single-chip microcomputer, resistance R6, R7, R8, triode V1, V2, transformer T1 and rectifier diode VD8, VD9, VD10, VD11; Described control unit circuit is connected with described controllable silicon VD7 by resistance R6, R7, the node between described switching circuit and described electrochemical capacitor charging circuit is connected to, by the node described in negative pole interface between electrochemical capacitor charging circuit and described three-phase bridge rectifier circuit by anode interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867364.5U CN204615637U (en) | 2014-12-31 | 2014-12-31 | Electrochemical capacitor pre-charge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867364.5U CN204615637U (en) | 2014-12-31 | 2014-12-31 | Electrochemical capacitor pre-charge circuit |
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| Publication Number | Publication Date |
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| CN204615637U true CN204615637U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420867364.5U Active CN204615637U (en) | 2014-12-31 | 2014-12-31 | Electrochemical capacitor pre-charge circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578746A (en) * | 2014-12-31 | 2015-04-29 | 山东艾磁驱动科技有限公司 | Electrolytic capacitor precharging circuit |
| CN107465338A (en) * | 2016-06-02 | 2017-12-12 | 罗克韦尔自动化技术公司 | Precharge device for electric power coversion system |
-
2014
- 2014-12-31 CN CN201420867364.5U patent/CN204615637U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578746A (en) * | 2014-12-31 | 2015-04-29 | 山东艾磁驱动科技有限公司 | Electrolytic capacitor precharging circuit |
| CN107465338A (en) * | 2016-06-02 | 2017-12-12 | 罗克韦尔自动化技术公司 | Precharge device for electric power coversion system |
| CN107465338B (en) * | 2016-06-02 | 2019-08-13 | 罗克韦尔自动化技术公司 | Precharge device for power conversion system |
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