CN201570913U - Balance voltage-limiting circuit - Google Patents
Balance voltage-limiting circuit Download PDFInfo
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- CN201570913U CN201570913U CN2009202454179U CN200920245417U CN201570913U CN 201570913 U CN201570913 U CN 201570913U CN 2009202454179 U CN2009202454179 U CN 2009202454179U CN 200920245417 U CN200920245417 U CN 200920245417U CN 201570913 U CN201570913 U CN 201570913U
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Abstract
The utility model relates to a balance voltage-limiting circuit, which comprises a power source, a voltage stabilizing unit circuit, a first divider resistor R1, a second divider resistor R2, a limit current resistor R3, a first capacitor C1, a second capacitor C2, a first resistor R4, a PNP-type transistor Q1, an NPN-type transistor Q2, a third resistor R11, a fourth resistor R12 and a sixth resistor R15. The reference voltage of the balance voltage-limiting circuit can be set according to safety voltage of protected capacitors, the circuit can actuate drainage clamping by aid of a voltage regulator tube D1 when input voltage is higher than the reference voltage and divide current in time by conducting the NPN type transistor Q2, thereby protecting capacitors.
Description
Technical field
The utility model relates to a kind of pressure limiting circuit, specifically is a kind of balanced voltage limiting circuit.
Background technology
Existing charging circuit generally all is based on battery as charge storage unit design; general all is at single rechargeable battery; be not suitable for the charging of the charge storage unit of utilizing a plurality of capacitances in series compositions; in the process of the charge storage unit charging of forming for a plurality of capacitances in series; must guarantee the safe charging of each electric capacity; need each electric capacity is carried out the restriction of charging voltage for this reason; and can regulate the charging voltage of each electric capacity according to the voltage condition of circuit automatically; therefore; need carry out equilibrium to each electric capacity and regulate, play the effect of voltage-limiting protection.
The utility model content
A kind of balanced voltage limiting circuit when the purpose of this utility model provides a kind of charging that is applicable to the charge storage unit that a plurality of series capacitances are formed is to guarantee the safety of electric capacity in the charging process.
In order to address the above problem, the utility model provides a kind of support multichannel multiple pressure operating circuit connected in series, see through the voltage tolerance point of regulating each operating circuit, make the multicircuit operate as normal, and it is stable to keep voltage, the circuit of protecting each circuit not to be damaged, it specifically is a kind of balanced voltage limiting circuit, its special character is that this circuit comprises power supply, the voltage regulation unit circuit, the first divider resistance R1, the second divider resistance R2, current-limiting resistance R3, first capacitor C 1, second capacitor C 2, first resistance R 4, PNP transistor Q1, NPN transistor Q2, the 3rd resistance R 11, the 4th resistance R 12, the 6th resistance R 15;
The described first divider resistance R1 and the second divider resistance R2 are serially connected between the both positive and negative polarity of power supply;
Described first capacitor C 1, first resistance R 4 are serially connected between the base stage of the node of the first divider resistance R1 and the second divider resistance R2 and PNP transistor Q1 successively;
Described current-limiting resistance R3 and voltage regulation unit circuit are serially connected between the both positive and negative polarity of power supply successively;
The collector electrode of described PNP transistor Q1 connects positive source, and emitter is by the 3rd resistance R 11 ground connection;
Described the 4th resistance R 12 is serially connected between the base stage of the emitter of PNP transistor Q1 and NPN transistor Q2;
The collector electrode of described NPN transistor Q2 connects positive source by the 6th resistance R 15, its grounded emitter.
This circuit also comprises second resistance R 10 and the 5th resistance R 5, and wherein, described second resistance R 10 and second capacitor C 2 are attempted by between the base stage and ground of PNP transistor Q1; Described the 5th resistance R 5 is serially connected between the emitter of the node of the described first divider resistance R1 and the second divider resistance R2 and PNP transistor Q1.
Described voltage regulation unit circuit is voltage-stabiliser tube D1 or voltage detector circuit; The trigger electrode of described voltage-stabiliser tube D1 is connected to the node of the first divider resistance R1 and the second divider resistance R2, and its negative pole and current-limiting resistance R3 join, and its positive pole connects power cathode; Described voltage detecting circuit is made up of voltage detector and NPN transistor Q3, the power input of voltage detector is connected to the node of the first divider resistance R1 and the second divider resistance R2, its power output end connects the base stage of NPN transistor Q3, and its earth terminal connects power cathode with the emitter of NPN transistor Q3; The collector electrode of NPN transistor Q3 meets current-limiting resistance R3.
Pressure limiting circuit of the present utility model; can be according to setting its reference voltage with the safe voltage of electric capacity of protection, and by voltage-stabiliser tube D1 earial drainage clamper when input voltage is higher than reference voltage, and by conducting NPN transistor Q2; make its timely shunting, thereby play the purpose of protection electric capacity.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the voltage detecting circuit schematic diagram;
Fig. 3 is the pressure limiting circuit schematic diagram of a plurality of series capacitances.
Embodiment
Referring to Fig. 1, the first divider resistance R1 and the second divider resistance R2 in the circuit of the present utility model are serially connected between the both positive and negative polarity of power supply; First capacitor C 1, first resistance R 4 are serially connected between the base stage of the node of the first divider resistance R1 and the second divider resistance R2 and PNP transistor Q1 successively; Current-limiting resistance R3 and voltage-stabiliser tube D1 are serially connected between the both positive and negative polarity of power supply successively, and the trigger electrode of voltage-stabiliser tube D1 is connected to the node of the first divider resistance R1 and the second divider resistance R2; Second resistance R 10 and second capacitor C 2 also are connected between the base stage and ground of PNP transistor Q1; The collector electrode of PNP transistor Q1 connects positive source, and emitter is by the 3rd resistance R 11 ground connection; The 5th resistance R 5 is serially connected between the emitter of described node and PNP transistor Q1; The 4th resistance R 12 is serially connected between the base stage of the emitter of PNP transistor Q1 and NPN transistor Q2; The collector electrode of NPN transistor Q2 connects positive source by the 6th resistance R 15, its grounded emitter.
Voltage-stabiliser tube D1 in the circuit of the present utility model is voltage reference (magnitude of voltage of voltage reference is set according to the rated voltage of the electric capacity SC1 of desire protection); regulate the pressure valve of voltage-stabiliser tube D1 by the first divider resistance R1 and the second divider resistance R2; if the value of power supply VCC is added on voltage on the voltage-stabiliser tube D1 after by the first divider resistance R1 and the second divider resistance R2 dividing potential drop still greater than the setting voltage value of voltage-stabiliser tube D1; voltage-stabiliser tube D1 earial drainage clamper then; PNP transistor Q1 conducting; control NPN transistor Q2 conducting; by release electric current on the power supply VCC of the 6th resistance R 15; move the magnitude of voltage of voltage-stabiliser tube D1 to set point, thereby play the effect of protection electric capacity SC1.
For example, the circuit that protect is withstand voltage to be 5V, and the threshold voltage of the voltage reference of selecting is 2.5V, then can set the first divider resistance R1 and the second divider resistance R2 all selects 100K Ω, R1, R2 choosing value should be too not little, reducing circuit power consumption, and the protection voltage reference; The choosing value of current-limiting resistance R3 is reference with the rated operational current of voltage reference, and general choosing value is between hundreds of is to several kilohms; C2 selects 0.1uF or 1uF anti-shake; The general PNP of transistor Q1 pipe is as 9012 etc.; Transistor Q2 selects powerful NPN pipe, and the 6th resistance R 15 is preferably selected several ohm high-power resistance, and 2 to 3 watts, reliable earial drainage.
Referring to Fig. 2, voltage regulation unit circuit of the present utility model is that voltage detector circuit is made up of voltage detector and NPN transistor Q3, as seen the voltage-stabiliser tube that utilizes this circuit to replace among Fig. 1 is: the power input of voltage detector is connected to the node of the first divider resistance R1 and the second divider resistance R2, its power output end connects the base stage of NPN transistor Q3, and its earth terminal connects power cathode with the emitter of NPN transistor Q3; The collector electrode of NPN transistor Q3 meets current-limiting resistance R3.
Referring to Fig. 3, circuit of the present utility model, the multinode pressure limiting circuit that can join and form series circuit by P1 and P2 first place realizes that the balance of circuit effectively operates, and guarantees the safety of each electric capacity of connecting.
Claims (3)
1. balanced voltage limiting circuit, it is characterized in that: this circuit comprises power supply, voltage regulation unit circuit, the first divider resistance R1, the second divider resistance R2, current-limiting resistance R3, first capacitor C 1, second capacitor C 2, first resistance R 4, PNP transistor Q1, NPN transistor Q2, the 3rd resistance R 11, the 4th resistance R 12, the 6th resistance R 15;
The described first divider resistance R1 and the second divider resistance R2 are serially connected between the both positive and negative polarity of power supply;
Described first capacitor C 1, first resistance R 4 are serially connected between the base stage of the node of the first divider resistance R1 and the second divider resistance R2 and PNP transistor Q1 successively;
Described current-limiting resistance R3 and voltage regulation unit circuit are serially connected between the both positive and negative polarity of power supply successively;
The collector electrode of described PNP transistor Q1 connects positive source, and emitter is by the 3rd resistance R 11 ground connection;
Described the 4th resistance R 12 is serially connected between the base stage of the emitter of PNP transistor Q1 and NPN transistor Q2;
The collector electrode of described NPN transistor Q2 connects positive source by the 6th resistance R 15, its grounded emitter.
2. balanced voltage limiting circuit according to claim 1 is characterized in that: this circuit also comprises second resistance R 10 and the 5th resistance R 5, and wherein, described second resistance R 10 and second capacitor C 2 are attempted by between the base stage and ground of PNP transistor Q1; Described the 5th resistance R 5 is serially connected between the emitter of the node of the described first divider resistance R1 and the second divider resistance R2 and PNP transistor Q1.
3. balanced voltage limiting circuit according to claim 1 and 2 is characterized in that: described voltage regulation unit circuit is voltage-stabiliser tube D1 or voltage detector circuit;
The trigger electrode of described voltage-stabiliser tube D1 is connected to the node of the first divider resistance R1 and the second divider resistance R2, and its negative pole and current-limiting resistance R3 join, and its positive pole connects power cathode;
Described voltage detecting circuit is made up of voltage detector and NPN transistor Q3, the power input of voltage detector is connected to the node of the first divider resistance R1 and the second divider resistance R2, its power output end connects the base stage of NPN transistor Q3, and its earth terminal connects power cathode with the emitter of NPN transistor Q3; The collector electrode of NPN transistor Q3 meets current-limiting resistance R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202454179U CN201570913U (en) | 2009-11-24 | 2009-11-24 | Balance voltage-limiting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202454179U CN201570913U (en) | 2009-11-24 | 2009-11-24 | Balance voltage-limiting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201570913U true CN201570913U (en) | 2010-09-01 |
Family
ID=42663213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202454179U Expired - Fee Related CN201570913U (en) | 2009-11-24 | 2009-11-24 | Balance voltage-limiting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201570913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570576A (en) * | 2012-02-24 | 2012-07-11 | 江苏中晖纺织机械有限公司 | Standby power supply control circuit of roving frame |
-
2009
- 2009-11-24 CN CN2009202454179U patent/CN201570913U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570576A (en) * | 2012-02-24 | 2012-07-11 | 江苏中晖纺织机械有限公司 | Standby power supply control circuit of roving frame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XI AN KEYWAY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: XI AN QIVI TEST + CONTROL TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 Xi'an high tech Zone, Jin Industrial Road, No., No. C Venture Park, No. 8, Patentee after: Xi'an Keyway Technology Co.,Ltd. Address before: 710077 Xi'an high tech Zone, Jin Industrial Road, No., No. C Venture Park, No. 8, Patentee before: Xi'an Qivi Test & Control Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20121124 |