CN201965164U - Inductance coil discharge circuit - Google Patents
Inductance coil discharge circuit Download PDFInfo
- Publication number
- CN201965164U CN201965164U CN201020644609XU CN201020644609U CN201965164U CN 201965164 U CN201965164 U CN 201965164U CN 201020644609X U CN201020644609X U CN 201020644609XU CN 201020644609 U CN201020644609 U CN 201020644609U CN 201965164 U CN201965164 U CN 201965164U
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- China
- Prior art keywords
- telefault
- diode
- discharge circuit
- voltage stabilizing
- discharge
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Abstract
The utility model discloses an inductance coil discharge circuit, which comprises a diode (D) and a voltage stabilizing module, wherein the voltage stabilizing module and the diode (D) are connected in series and are connected to both ends of an inductance coil (L) to be discharged after being connected in series, and the voltage stabilizing module consists of a power metal oxide semiconductor (MOS) tube (T) and a voltage stabilizing device connected between a grid electrode (G) and a drain electrode (D) of the power MOS tube (T). The inductance coil discharge circuit adopting the structure has the advantages that the quasi constant voltage discharge characteristic is realized, and the discharge process of an inductance coil is accelerated.
Description
Technical field
The utility model relates to a kind of mimic channel, especially relates to a kind of telefault discharge circuit.
Background technology
When the direct current resistance of telefault is measured, need given telefault one direct current electric current, after measurement finishes, need to discharge the telefault electric current.Existing electric discharge device is diode (D) series connection one resistance (R), utilize the unilateral conduction of diode (D), make electric discharge device not influence normal measurement, the effect of resistance (R) is to discharge the telefault electric current, because resistance (R) resistance is constant, the telefault electric current is the index law decay in time, and discharge time is longer, influences operate as normal.
The utility model content
The purpose of this utility model provides a kind of telefault discharge circuit, can have accurate constant voltage discharge characteristic, accelerates the discharge process of telefault.
For achieving the above object, the utility model provides a kind of telefault discharge circuit, comprise diode (D), also comprise Voltage stabilizing module, described Voltage stabilizing module after the series connection and described diode (D) are in series, described Voltage stabilizing module and described diode (D) are connected in telefault to be discharged (L) two ends, and described Voltage stabilizing module is made up of power MOS pipe (T) and the grid (G) and the voltage-stabilizing device of drain electrode between (D) that are connected in described power MOS pipe (T).
Preferably, described voltage-stabilizing device is voltage stabilizing diode (W), Transient Suppression Diode or voltage dependent resistor (VDR).
Preferably, the drain electrode (D) of described power MOS pipe (T) also is serially connected with resistance (R1).
Preferably, be connected to resistance (R2) between the grid (G) of described power MOS pipe (T) and source electrode (S).
Therefore, the utility model uses the telefault discharge circuit of said structure, can have accurate constant voltage discharge characteristic, accelerates the discharge process of telefault.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is the structural representation of original telefault discharge circuit embodiment;
Fig. 2 is the structural representation of the utility model telefault discharge circuit embodiment;
Fig. 3 is the syndeton synoptic diagram of the utility model telefault discharge circuit embodiment with the telefault of waiting to discharge;
Fig. 4 is not provided with the structural representation of resistance R 1 for the utility model telefault discharge circuit embodiment;
Fig. 5 is the variation relation curve contrast synoptic diagram of telefault electric current I and time t in original telefault discharge circuit and the telefault discharge circuit described in the utility model.
Embodiment
Embodiment
Fig. 2 is the structural representation of the utility model telefault discharge circuit embodiment, Fig. 3 is the syndeton synoptic diagram of the utility model telefault discharge circuit embodiment with the telefault of waiting to discharge, as shown in Figures 2 and 3, present embodiment comprises diode (D) and Voltage stabilizing module, described Voltage stabilizing module and diode (D) are in series, described Voltage stabilizing module after the series connection and diode (D) are connected in telefault to be discharged (L) two ends, the position of described Voltage stabilizing module and diode (D) can be changed mutually, does not influence the use of present embodiment.Described Voltage stabilizing module is made up of power MOS pipe (T) and the grid (G) and the voltage-stabilizing device of drain electrode between (D) that are connected in power MOS pipe (T), described voltage-stabilizing device is voltage stabilizing diode (W), Transient Suppression Diode or voltage dependent resistor (VDR), and present embodiment is preferably voltage stabilizing diode (W).
The drain electrode (D) of power MOS pipe (T) also is serially connected with resistance (R1), resistance (R1) is high-power resistance, the discharge power that is used for the magnanimous discharge telefault of branch (L), if the discharge power of telefault to be discharged (L) is less, power MOS pipe (T) can independently be born, can need not to be provided with resistance (R1), as shown in Figure 4.
Be connected to resistance (R2) between the grid (G) of power MOS pipe (T) and source electrode (S), resistance (R2) is the big resistance resistance of miniwatt, because power MOS pipe (T) input impedance is higher, if unsettled setting, its conducting state is a nondeterministic statement, at this big resistance resistance (R2) is set, can prevents that power MOS pipe (T) from misleading, and passes through V
GSThe on state resistance of power controlling metal-oxide-semiconductor (T), and then the discharge process of control telefault (L).
When present embodiment was worked, the telefault electric current of waiting to discharge formed the loop through resistance R 1, diode (D) and power MOS pipe (T), discharges the telefault electric current of waiting to discharge, when waiting to discharge the telefault electric current greatly the time, V
GSBigger, the equivalent resistance of power MOS pipe (T) is less, and main sparking voltage is born by resistance (R1); When the telefault electric current reduces gradually, V
GSCorresponding decline, the equivalent resistance of power MOS pipe (T) increases, and power MOS pipe (T) is born more sparking voltage; When the telefault electric current is reduced to 0, V
GS=0, power MOS pipe (T) equivalent resistance is very big, discharge off.The sparking voltage at telefault two ends of waiting in the whole process to discharge approximates V
GSWith V
WSum, wherein V
WBe the rated voltage of voltage stabilizing diode (W), be certain value, V
GSFor control voltage, according to the characteristic of power MOS pipe (T), the relative V of the variation range in control procedure
WLess, therefore telefault to be discharged is equivalent to the two ends constant voltage in the present embodiment, be in accurate voltage stabilizing state, characteristic decision discharge current approximately linear rule descends thus, accelerated the discharge process of telefault (L) greatly, improved the discharging efficiency of telefault, the variation relation of telefault electric current I and time t in the original telefault discharge circuit of curve 1 representative among Fig. 5, curve 2 are represented the variation relation of telefault electric current I and time t in the present embodiment.
Therefore, the utility model uses the telefault discharge circuit of said structure, can have accurate constant voltage discharge characteristic, accelerates the discharge process of telefault.
It should be noted that at last: above embodiment is only in order to explanation the technical solution of the utility model but not limit it, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solutions of the utility model.
Claims (4)
1. telefault discharge circuit, comprise diode (D), it is characterized in that: also comprise Voltage stabilizing module, described Voltage stabilizing module and described diode (D) are in series, described Voltage stabilizing module after the series connection and described diode (D) are connected in telefault to be discharged (L) two ends, and described Voltage stabilizing module is made up of power MOS pipe (T) and the grid (G) and the voltage-stabilizing device of drain electrode between (D) that are connected in described power MOS pipe (T).
2. telefault discharge circuit according to claim 1 is characterized in that: described voltage-stabilizing device is voltage stabilizing diode (W), Transient Suppression Diode or voltage dependent resistor (VDR).
3. telefault discharge circuit according to claim 2 is characterized in that: the drain electrode (D) of described power MOS pipe (T) also is serially connected with resistance (R1).
4. telefault discharge circuit according to claim 3 is characterized in that: be connected to resistance (R2) between the grid (G) of described power MOS pipe (T) and source electrode (S).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020644609XU CN201965164U (en) | 2010-12-02 | 2010-12-02 | Inductance coil discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020644609XU CN201965164U (en) | 2010-12-02 | 2010-12-02 | Inductance coil discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201965164U true CN201965164U (en) | 2011-09-07 |
Family
ID=44527710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020644609XU Expired - Lifetime CN201965164U (en) | 2010-12-02 | 2010-12-02 | Inductance coil discharge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201965164U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093580A (en) * | 2016-06-13 | 2016-11-09 | 国家电网公司 | A kind of transformator directly hinders measurement quick discharging circuit |
| CN106300312A (en) * | 2016-09-14 | 2017-01-04 | 海南电网有限责任公司海口供电局 | A kind of transformator directly hinders measurement double loop discharge circuit |
| CN107918057A (en) * | 2016-10-11 | 2018-04-17 | 联合汽车电子有限公司 | The measuring method and its measuring system of ignition coil primary inductance |
-
2010
- 2010-12-02 CN CN201020644609XU patent/CN201965164U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093580A (en) * | 2016-06-13 | 2016-11-09 | 国家电网公司 | A kind of transformator directly hinders measurement quick discharging circuit |
| CN106300312A (en) * | 2016-09-14 | 2017-01-04 | 海南电网有限责任公司海口供电局 | A kind of transformator directly hinders measurement double loop discharge circuit |
| CN107918057A (en) * | 2016-10-11 | 2018-04-17 | 联合汽车电子有限公司 | The measuring method and its measuring system of ignition coil primary inductance |
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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 |
Granted publication date: 20110907 |
|
| CX01 | Expiry of patent term |