CN201966816U - Rapid discharge circuit of inductance coil - Google Patents
Rapid discharge circuit of inductance coil Download PDFInfo
- Publication number
- CN201966816U CN201966816U CN201120031667XU CN201120031667U CN201966816U CN 201966816 U CN201966816 U CN 201966816U CN 201120031667X U CN201120031667X U CN 201120031667XU CN 201120031667 U CN201120031667 U CN 201120031667U CN 201966816 U CN201966816 U CN 201966816U
- Authority
- CN
- China
- Prior art keywords
- inductance coil
- diode
- resistance
- voltage
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a rapid discharge circuit of an inductance coil, which comprises a current source, a rectification module and a voltage stabilization module, wherein the rectification module comprises a diode (D1), a diode (D2), a diode (D3) and a diode (D4); the voltage stabilization module is connected with the rectification module; and the rectification module is connected with the inductance coil to be discharged. By using the structure, the rapid discharge circuit of the inductance coil has a bidirectional stabilizing voltage characteristic. While the rapid discharge is realized on the inductance coil, high voltage in an arbitrary direction, which enters a measuring apparatus through a testing line, can also be clamped, and thereby, the measuring apparatus is prevented from damage and the dual functions of rapid discharge and measuring apparatus protection are achieved.
Description
Technical field
The utility model relates to a kind of analog circuit, especially relates to a kind of inductance coil quick discharging circuit.
Background technology
Inductance coil is widely used in the various electric equipments, and as Transformer Winding, reactor, instrument transformer etc. have the coil of awareness character, and measuring its D.C. resistance is an importance of its quality of check.The inductance coil instrument for measuring DC resistance has a current source usually, power to inductance coil, by detecting its terminal voltage, and then try to achieve its D.C. resistance, after test is finished, need a discharge loop to discharge the energy of inductance coil storage, traditional discharge loop is the diode power resistor of connecting, discharge the inductance coil energy, discharging is the index law decay, and the time is longer.
During the inductance coil instrument for measuring DC resistance uses at the scene, face complex electromagnetic environments, extraneous highfield, other windings on the same iron core are the energy of inductance coil and lightning impulse etc., the capital enters tester by the instrument test line, and these have high-octane, the uncertain high voltage of direction can cause damage to instrument.
The utility model content
The purpose of this utility model provides a kind of inductance coil quick discharging circuit; can have the bi-directional voltage stabilizing characteristic; when realizing to the inductance coil repid discharge; can also carry out clamped to any direction high voltage that enters measuring instrument by p-wire; avoid damaging measuring instrument, realize the dual-use function of repid discharge and protection measuring instrument.
For achieving the above object, the utility model provides a kind of inductance coil quick discharging circuit, the rectification module and the Voltage stabilizing module that comprise current source, form by diode (D1), diode (D2), diode (D3), diode (D4), described Voltage stabilizing module is connected with described rectification module, and described rectification module is connected with inductance coil to be discharged.
Preferably, 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 didoe (W), Transient Suppression Diode or piezo-resistance.
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 inductance coil quick discharging circuit of said structure; can have the bi-directional voltage stabilizing characteristic; when realizing to the inductance coil repid discharge; can also carry out clamped to any direction high voltage that enters measuring instrument by p-wire; avoid damaging measuring instrument, realize the dual-use function of repid discharge and protection measuring instrument.
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 inductance coil quick discharging circuit embodiment described in the utility model;
Fig. 2 is the variation relation curve contrast schematic diagram of inductance coil electric current I and time t in original inductance coil discharge circuit and the inductance coil quick discharging circuit described in the utility model.
Embodiment
Embodiment
Fig. 1 is the structural representation of the utility model inductance coil quick discharging circuit embodiment, as shown in Figure 1, the rectification module and the Voltage stabilizing module that comprise current source, form by diode (D1), diode (D2), diode (D3), diode (D4), described Voltage stabilizing module is connected with described rectification module, and described rectification module is connected with inductance coil to be discharged.When present embodiment is worked, the induced voltage of supposing the inductance coil of waiting to discharge waits to discharge inductance coil interface one for anodal during for forward, electric current flows into Voltage stabilizing module from diode D1, through flowing back to inductance coil to be discharged through diode D3 again behind the Voltage stabilizing module, form discharge loop, when if induced voltage is negative sense, electric current flows into Voltage stabilizing module from diode D4, through flowing back to inductance coil to be discharged through diode D2 again behind the Voltage stabilizing module, form discharge loop, thereby realize the two-way discharge of inductance coil, because its bi-directional voltage stabilizing characteristic that has, the high voltage of any direction all has clamped effect to external world, avoids damaging measuring instrument.
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 didoe (W), Transient Suppression Diode or piezo-resistance, and present embodiment is preferably voltage stabilizing didoe (W).
The drain electrode (D) of power MOS pipe (T) also is serially connected with resistance (R1), resistance (R1) is high-power resistance, is used for the discharge power of the magnanimous discharge inductance coil of branch, if the discharge power of the inductance coil of waiting to discharge is less, power MOS pipe (T) can independently be born, and can need not to be provided with resistance (R1).
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 small-power, 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 inductance coil (L).
When present embodiment is worked, when the inductance coil electric current of waiting to discharge is big, V
GSBigger, the equivalent resistance of power MOS pipe (T) is less, and main discharge voltage is born by resistance (R1); When the inductance coil electric current reduces gradually, V
GSCorresponding decline, the equivalent resistance of power MOS pipe (T) increases, and power MOS pipe (T) is born more discharge voltage; When the inductance coil electric current is reduced to 0, V
GS=0, power MOS pipe (T) equivalent resistance is very big, discharge off.The discharge voltage at inductance coil two ends of waiting in the whole process to discharge approximates V
GSWith V
WSum, wherein V
WBe the rated voltage of voltage stabilizing didoe (W), be certain value, V
GSFor control voltage, according to the characteristic of power MOS pipe (T), the relative V of the excursion in control procedure
WLess, therefore inductance coil to be discharged is equivalent to the two ends constant voltage in the present embodiment, be in accurate voltage stabilizing state, characteristic decision discharging current approximately linear rule descends thus, with respect to the connect inductance coil discharge circuit of a resistance of simple use diode, accelerated the discharge process of inductance coil (L) greatly, improved the discharging efficiency of inductance coil, simple the connect variation relation of inductance coil electric current I and time t in the inductance coil discharge circuit of a resistance of diode that uses of curve 1 representative among Fig. 2, curve 2 are represented the variation relation of inductance coil electric current I and time t in the present embodiment.
Therefore; the utility model uses the inductance coil quick discharging circuit of said structure; can have the bi-directional voltage stabilizing characteristic; when realizing to the inductance coil repid discharge; can also carry out clamped to any direction high voltage that enters measuring instrument by p-wire; avoid damaging measuring instrument, realize the dual-use function of repid discharge and protection measuring instrument.
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 (5)
1. inductance coil quick discharging circuit, comprise current source, it is characterized in that: also comprise rectification module and the Voltage stabilizing module formed by diode (D1), diode (D2), diode (D3), diode (D4), described Voltage stabilizing module is connected with described rectification module, and described rectification module is connected with inductance coil to be discharged.
2. inductance coil quick discharging circuit according to claim 1 is characterized in that: 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).
3. inductance coil quick discharging circuit according to claim 2 is characterized in that: described voltage-stabilizing device is voltage stabilizing didoe (W), Transient Suppression Diode or piezo-resistance.
4. inductance coil quick discharging circuit according to claim 3 is characterized in that: the drain electrode (D) of described power MOS pipe (T) also is serially connected with resistance (R1).
5. inductance coil quick discharging circuit according to claim 4 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 |
|---|---|---|---|
| CN201120031667XU CN201966816U (en) | 2011-01-25 | 2011-01-25 | Rapid discharge circuit of inductance coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120031667XU CN201966816U (en) | 2011-01-25 | 2011-01-25 | Rapid discharge circuit of inductance coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966816U true CN201966816U (en) | 2011-09-07 |
Family
ID=44529368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120031667XU Expired - Lifetime CN201966816U (en) | 2011-01-25 | 2011-01-25 | Rapid discharge circuit of inductance coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201966816U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111308310A (en) * | 2020-05-15 | 2020-06-19 | 佛山市联动科技股份有限公司 | Dynamic rds (on) parameter testing machine of gallium nitride device |
-
2011
- 2011-01-25 CN CN201120031667XU patent/CN201966816U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111308310A (en) * | 2020-05-15 | 2020-06-19 | 佛山市联动科技股份有限公司 | Dynamic rds (on) parameter testing machine of gallium nitride device |
| CN111308310B (en) * | 2020-05-15 | 2020-08-21 | 佛山市联动科技股份有限公司 | Dynamic rds (on) parameter testing machine of gallium nitride device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203313144U (en) | Backflow prevention circuit | |
| CN103683861A (en) | Novel silicon-controlled rectifier trigger circuit | |
| CN103795054A (en) | Lightning protection system and method of direct-current remote supply power equipment | |
| CN201966816U (en) | Rapid discharge circuit of inductance coil | |
| CN203632222U (en) | Output short circuit protection circuit of flyback converter | |
| CN204068191U (en) | AFDD fault electric arc protector | |
| CN103647447B (en) | The supply unit of a kind of electric energy table communication module | |
| CN202013387U (en) | Charger detection circuit | |
| CN201965164U (en) | Inductance coil discharge circuit | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN102043080B (en) | Current sampling circuit of high-frequency charger | |
| CN204696664U (en) | The output overvoltage undervoltage protection device of DC-DC power source | |
| CN104568033B (en) | High frequency excitation unit | |
| CN203932994U (en) | A kind of low-voltage dc power supply port surge protection circuit | |
| CN201788202U (en) | Electronic load circuit | |
| CN204559158U (en) | A kind of power path management circuit | |
| CN205039513U (en) | High -power circuit protector against power failure of high efficiency | |
| CN203434951U (en) | Wide voltage pulse reception isolated circuit | |
| CN103095144B (en) | Power supply circuit provided with voltage acceleration compensation | |
| CN204761069U (en) | Voltage control circuit is crossed in short -term to electric tricycle charger | |
| CN204681076U (en) | A kind of protective circuit for exchanging two-wire system tuning fork material-position measuring meter | |
| CN201345532Y (en) | Power output short-circuit protection circuit | |
| CN104967327B (en) | A kind of method of single line constant current/constant voltage electric energy conversion | |
| CN217215962U (en) | Buck-full bridge topology protection circuit | |
| CN205176228U (en) | Armature integrated test device based on CAN bus |
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 |