CN203632541U - A damping current limiting circuit used for a DC-DC direct current converter - Google Patents
A damping current limiting circuit used for a DC-DC direct current converter Download PDFInfo
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- CN203632541U CN203632541U CN201320885779.0U CN201320885779U CN203632541U CN 203632541 U CN203632541 U CN 203632541U CN 201320885779 U CN201320885779 U CN 201320885779U CN 203632541 U CN203632541 U CN 203632541U
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Abstract
The utility model discloses a damping current limiting circuit used for a DC-DC direct current converter. An anode input line is connected with a load. A cathode input line is connected with the load through a temperature control resistor NTC. The anode input line is connected with a G pole of an MOS tube via a resistor R2 and a resistor R4. A D pole of the MOS tube is connected with the anode input line through a capacitor 3. An S pole of the MOS tube is connected with the cathode input line. A voltage stabilizing diode ZD1 and a resistor R5 are in parallel connection between the G pole and the S pole of the MOS tube. The G pole of the MOS tube is connected with an anode of a diode D1. A cathode of the diode D1 is connected with the cathode input line through a capacitor C1. A resistor R6 is in parallel connection with the two ends of the capacitor C1. A contact b between the diode D1 and the capacitor C1 is connected with the anode input line through a resistor R1. A contact a between a resistor R2 and a resistor R4 is connected with the load via a capacitor C2 and a resistor R3. The damping current limiting circuit used for the DC-DC direct current converter is advantageous in that the damping current limiting circuit used for the DC-DC direct current converter is simple in connection and reliable in operation; and occurrence of sparking phenomenon can be effectively prevented.
Description
Technical field
The utility model relates to DC-DC direct current transducer and manufactures field, particularly a kind of damping current-limiting circuit for DC-DC direct current transducer.
Background technology
Along with increasing gradually of haze weather, being on the rise of environmental pollution, national, the people more and more pay attention to environmental problem; Country is the control to environment promptly, avoids the further deterioration of environmental problem, and automobile discharges in volume tail gas and contains a large amount of carbon dioxide and nitrogen oxide, and a large amount of vehicle exhausts can cause serious air pollution.At present, new-energy automobile, because it can not produce and pollute environment, and is subject to vigorously supporting and encouraging of national policy, and wherein electric automobile can drop into volume production.
The energy of electric automobile is to rely on on-vehicle battery power supply, and general supplying cell voltage has the height of tens of volts to hundreds of volts.And vehicle-mounted power consumption equipment is 12V or 24V substantially, therefore, need to pass through DC-DC transducer, change high direct voltage into DC low-voltage and supply with electrical equipment use.Electric automobile prospect a slice is good at present, requires also more and more higher to DC-DC converter technology.
, when in use, all can there is spark phenomenon in DC-DC direct current transducer in the market.So-called spark phenomenon, is exactly in the moment of connecting load, has very large electric current output, makes input wires or input plug and produces spark.Spark phenomenon exists and makes the use of DC-DC direct current transducer have potential safety hazard, repeatedly, after sparking, can make wiring or plug loose contact, thereby cause the work of DC-DC direct current transducer unreliable.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, provides and connects simply, reliable, can effectively prevent a kind of damping current-limiting circuit for DC-DC direct current transducer that spark phenomenon produces.
The utility model solves the problems of the technologies described above adopted technical scheme:
For a damping current-limiting circuit for DC-DC direct current transducer, comprise anodal input line and negative pole input line, wherein, anodal input line is directly connected with load, and negative pole input line is connected with load through temperature resistance NTC;
Anodal input line is connected with the G utmost point of metal-oxide-semiconductor through resistance R 2, resistance R 4, and the D utmost point of metal-oxide-semiconductor is connected with anodal input line through capacitor C 3, and the S utmost point of metal-oxide-semiconductor is connected with negative pole input line;
Between the G utmost point of metal-oxide-semiconductor and the S utmost point, be parallel with voltage stabilizing didoe ZD1 and resistance R 5; The G utmost point of metal-oxide-semiconductor is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with negative pole input line through capacitor C 1, and the two ends of capacitor C 1 are parallel with resistance R 6;
Contact b between diode D1 and capacitor C 1 is connected with anodal input line through resistance R 1;
Contact a between resistance R 2 and resistance R 4 is connected with load with capacitor C 2 through resistance R 3.
For optimizing technique scheme, the concrete measure of taking also comprises:
The resistance of above-mentioned resistance R 1 is 10K Ω to 100K Ω, and the resistance of resistance R 2 is 100K Ω, and the resistance of resistance R 3 is 47K Ω to 500K Ω, and the resistance of resistance R 4 is 10K Ω, and the resistance of resistance R 5 is 47K Ω, and the resistance of resistance R 6 is 6.8K Ω.
The capacitance of above-mentioned capacitor C 1 is 10 μ F to 470 μ F, and the capacitance of capacitor C 2 is 10nF.
The voltage at above-mentioned voltage stabilizing didoe ZD1 two ends is 10V to 12V.
The positive current of above-mentioned diode D1 is 1A, and its puncture voltage is 1000V.
Compared with prior art, a kind of damping current-limiting circuit for DC-DC direct current transducer of the utility model, in this circuit, be provided with a metal-oxide-semiconductor, in the time of anodal input line and negative pole input line input connection, anodal input line directly accesses load, and negative pole input line is through temperature resistance NTC access load, now metal-oxide-semiconductor cut-off, the immediate current of input is subject to the restriction of temperature resistance NTC, and electric current is very little, thereby has avoided the generation of spark phenomenon.
Anodal input line is received the G utmost point of metal-oxide-semiconductor simultaneously, switches on power moment, and the G pole tension of metal-oxide-semiconductor is low-voltage, and power supply charges to capacitor C 1, and the voltage of capacitor C 1 is raise gradually, in the time that voltage reaches the trigger voltage of metal-oxide-semiconductor, and metal-oxide-semiconductor conducting; When metal-oxide-semiconductor conducting, internal resistance is very little, is equivalent to short circuit, and now metal-oxide-semiconductor is temperature resistance NTC bypass, and electric current is directly from metal-oxide-semiconductor access load and make load energising.
Metal-oxide-semiconductor effect is equivalent to a switch, and within a period of time switching on power at first, metal-oxide-semiconductor is closed, and negative pole input line, through a temperature resistance NTC access load that resistance is very large, because electric current is very little, can not cause sparking; And after delay finishes, metal-oxide-semiconductor conducting, negative pole input line, in the metal-oxide-semiconductor access load of conducting, has at this moment normally been worked, and spark phenomenon can not occur again.
The effect of temperature resistance NTC, is on the one hand to connect moment, and Limited Current prevents sparking, is the insurance as metal-oxide-semiconductor on the one hand in addition, and after metal-oxide-semiconductor lost efficacy, temperature resistance NTC still can accomplish to delay Current rise, reaches the object that prevents sparking.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
Embodiment as shown in Figure 1, figure grade explanation: anodal input line 1, negative pole input line 2, load 3.
The utility model
For a damping current-limiting circuit for DC-DC direct current transducer, comprise anodal input line 1 and negative pole input line 2, wherein, anodal input line 1 is directly connected with load 3, and negative pole input line 2 is connected with load 3 through temperature resistance NTC;
Anodal input line 1 is connected with the G utmost point of metal-oxide-semiconductor through resistance R 2, resistance R 4, and the D utmost point of metal-oxide-semiconductor is connected with anodal input line 1 through capacitor C 3, and the S utmost point of metal-oxide-semiconductor is connected with negative pole input line 2;
Between the G utmost point of metal-oxide-semiconductor and the S utmost point, be parallel with voltage stabilizing didoe ZD1 and resistance R 5; The G utmost point of metal-oxide-semiconductor is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with negative pole input line 2 through capacitor C 1, and the two ends of capacitor C 1 are parallel with resistance R 6;
Contact b between diode D1 and capacitor C 1 is connected with anodal input line 1 through resistance R 1;
Contact a between resistance R 2 and resistance R 4 is connected with load 3 with capacitor C 2 through resistance R 3.
Meanwhile, the D utmost point of metal-oxide-semiconductor is connected with load 3, and resistance R 3 and capacitor C 2 are controlled the speed that the voltage of the metal-oxide-semiconductor D utmost point climbs; After energising, along with the charging of capacitor C 1 finishes metal-oxide-semiconductor conducting, resistance R 2 and resistance R 3 are charged to capacitor C 2, after capacitor C 2, resistance R 3 and resistance R 4 series connection, be connected across together between the D utmost point and the G utmost point of metal-oxide-semiconductor, be equivalent to be connected in parallel in metal-oxide-semiconductor junction capacitance, be used as integrator the switching characteristic of metal-oxide-semiconductor is accurately controlled; Control the D pole tension linearity of metal-oxide-semiconductor and just can accurately control impulse current.
Resistance R 1 connects and composes charge circuit with capacitor C 1; Resistance R 6 connects and composes discharge loop with capacitor C 1.
In embodiment, the resistance of resistance R 1 is 10K Ω to 100K Ω, and the resistance of resistance R 2 is 100K Ω, and the resistance of resistance R 3 is 47K Ω to 500K Ω, and the resistance of resistance R 4 is 10K Ω, and the resistance of resistance R 5 is 47K Ω, and the resistance of resistance R 6 is 6.8K Ω.
In embodiment, the capacitance of capacitor C 1 is 10 μ F to 470 μ F, and the capacitance of capacitor C 2 is 10nF.
In embodiment, the voltage at voltage stabilizing didoe ZD1 two ends is 10V to 12V.
In embodiment, the positive current of diode D1 is 1A, and its puncture voltage is 1000V.
The G utmost point of metal-oxide-semiconductor, corresponding grid, source class and the drain electrode respectively of the S utmost point and the D utmost point.
Operation principle:
A kind of damping current-limiting circuit for DC-DC direct current transducer of the utility model, mainly comprises metal-oxide-semiconductor and temperature resistance NTC, and the delay circuit being made up of resistance R 1 and capacitor C 1.
Anodal input line 1 is directly connected with load 3, negative pole input line 2 is connected with load 3 through temperature resistance NTC, in the time that anodal input line 1 and negative pole input line 2 access power supply, and metal-oxide-semiconductor cut-off, it is subject to the impact of delay circuit, tens of to just can conducting after hundreds of millisecond.And moment input current while connecing electricity is subject to the restriction of temperature resistance NTC, electric current is very little, thereby has avoided the generation of spark phenomenon.
Anodal input line 1 is joined with the G utmost point of metal-oxide-semiconductor, switch on power moment, the G pole tension of metal-oxide-semiconductor is low-voltage, and power supply connects and composes charge circuit by resistance R 1 and capacitor C 1 capacitor C 1 is charged, the voltage of capacitor C 1 is raise gradually, thereby reach the object of delay.In the time that voltage reaches the trigger voltage of metal-oxide-semiconductor, metal-oxide-semiconductor conducting; When metal-oxide-semiconductor conducting, internal resistance is very little, is equivalent to short circuit, and now metal-oxide-semiconductor is temperature resistance NTC bypass, and electric current is directly from metal-oxide-semiconductor access load and make load energising.
The effect of metal-oxide-semiconductor is equivalent to a switch, and within a period of time switching on power at first, metal-oxide-semiconductor is closed, and negative pole input line 2, through a temperature resistance NTC access load that resistance is very large, because electric current is very little, can not cause sparking; And after delay finishes, metal-oxide-semiconductor conducting, negative pole input line 2, in the metal-oxide-semiconductor access load of conducting, has at this moment normally been worked, and spark phenomenon can not occur again.
The effect of temperature resistance NTC, is on the one hand to connect moment, and Limited Current prevents sparking, is the insurance as metal-oxide-semiconductor on the one hand in addition, and after metal-oxide-semiconductor lost efficacy, temperature resistance NTC still can accomplish to delay Current rise, reaches the object that prevents sparking.
Temperature resistance NTC has negative temperature coefficient, larger through overcurrent, and temperature is higher, and internal resistance is less.Therefore, lost efficacy if metal-oxide-semiconductor damages, temperature resistance NTC can replace metal-oxide-semiconductor effect; Along with the increase of electric current, the resistance of temperature resistance NTC is more and more less, and the electric current that flows through temperature resistance NTC is increasing, finally reaches to load normal power supply; Make like this operation of circuit more stable, have more safety.
Temperature resistance NTC, in current flowing, can generate heat, and therefore, the object that only depends on temperature resistance NTC to reach anti-sparking is perfect not.
Diode D1 has been clamping action, and when the energising initial stage, diode D1 conducting, is clamped down on below trigger voltage the voltage of the G utmost point of metal-oxide-semiconductor, along with C1 charging voltage raises, and diode D1 cut-off, more than the voltage of the G utmost point reaches trigger voltage, metal-oxide-semiconductor conducting.
The voltage stabilizing didoe ZD1 of parallel connection between the G utmost point of metal-oxide-semiconductor and the S utmost point, its effect is that protection metal-oxide-semiconductor is not breakdown.
When input voltage disappears, C1 and R6 form discharge loop, and C1 voltage is zero, returns to initial condition.
This damping current-limiting circuit is applicable in various switching circuits, all can play the object that prevents sparking.
When this damping current-limiting circuit is applied to DC-DC direct current transducer, DC-DC direct current transducer is load 3, anodal input line 1 is directly connected with DC-DC direct current transducer, negative pole input line 2 is connected with DC-DC direct current transducer through temperature resistance NTC, the metal-oxide-semiconductor cut-off of energising initial stage, due to the restriction of temperature resistance NTC, DC-DC direct current transducer can not produce spark phenomenon, has guaranteed the safety and stability that DC-DC direct current transducer uses; When being increased to trigger voltage, connects the G pole tension of metal-oxide-semiconductor.
Most preferred embodiment of the present utility model is illustrated, and the various variations of being made by those of ordinary skills or remodeling can not depart from scope of the present utility model.
Claims (5)
1. the damping current-limiting circuit for DC-DC direct current transducer, comprise anodal input line (1) and negative pole input line (2), it is characterized in that: described anodal input line (1) is directly connected with load (3), and described negative pole input line (2) is connected with load (3) through temperature resistance NTC;
Described anodal input line (1) is connected with the G utmost point of metal-oxide-semiconductor through resistance R 2, resistance R 4, the D utmost point of described metal-oxide-semiconductor is connected with anodal input line (1) through capacitor C 3, and the S utmost point of described metal-oxide-semiconductor is connected with negative pole input line (2);
Between the G utmost point of described metal-oxide-semiconductor and the S utmost point, be parallel with voltage stabilizing didoe ZD1 and resistance R 5; The G utmost point of described metal-oxide-semiconductor is connected with the positive pole of diode D1, and the negative pole of diode D1 is connected with negative pole input line (2) through capacitor C 1, and the two ends of described capacitor C 1 are parallel with resistance R 6;
Contact b between described diode D1 and capacitor C 1 is connected with anodal input line (1) through resistance R 1;
Contact a between described resistance R 2 and resistance R 4 is connected with load (3) with capacitor C 2 through resistance R 3.
2. a kind of damping current-limiting circuit for DC-DC direct current transducer according to claim 1, it is characterized in that: the resistance of described resistance R 1 is 10K Ω to 100K Ω, the resistance of resistance R 2 is 100K Ω, the resistance of resistance R 3 is 47K Ω to 500K Ω, the resistance of resistance R 4 is 10K Ω, the resistance of resistance R 5 is 47K Ω, and the resistance of resistance R 6 is 6.8K Ω.
3. a kind of damping current-limiting circuit for DC-DC direct current transducer according to claim 2, is characterized in that: the capacitance of described capacitor C 1 is 10 μ F to 470 μ F, and the capacitance of described capacitor C 2 is 10nF.
4. a kind of damping current-limiting circuit for DC-DC direct current transducer according to claim 3, is characterized in that: the voltage at described voltage stabilizing didoe ZD1 two ends is 10V to 12V.
5. a kind of damping current-limiting circuit for DC-DC direct current transducer according to claim 4, is characterized in that: the positive current of described diode D1 is 1A, and its puncture voltage is 1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885779.0U CN203632541U (en) | 2013-12-31 | 2013-12-31 | A damping current limiting circuit used for a DC-DC direct current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885779.0U CN203632541U (en) | 2013-12-31 | 2013-12-31 | A damping current limiting circuit used for a DC-DC direct current converter |
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| Publication Number | Publication Date |
|---|---|
| CN203632541U true CN203632541U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320885779.0U Expired - Fee Related CN203632541U (en) | 2013-12-31 | 2013-12-31 | A damping current limiting circuit used for a DC-DC direct current converter |
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| CN (1) | CN203632541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701313A (en) * | 2013-12-31 | 2014-04-02 | 宁波市子华电器有限公司 | Damping current-limiting circuit used in DC (direct current)-DC converter |
-
2013
- 2013-12-31 CN CN201320885779.0U patent/CN203632541U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701313A (en) * | 2013-12-31 | 2014-04-02 | 宁波市子华电器有限公司 | Damping current-limiting circuit used in DC (direct current)-DC converter |
| CN103701313B (en) * | 2013-12-31 | 2015-10-28 | 宁波市子华电器有限公司 | A kind of damping current-limiting circuit for DC-DC direct current transducer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20181231 |