CN207069894U - Mine anti-explosion high voltage converter DC filter capacitor electric discharge device - Google Patents
Mine anti-explosion high voltage converter DC filter capacitor electric discharge device Download PDFInfo
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- CN207069894U CN207069894U CN201720989711.5U CN201720989711U CN207069894U CN 207069894 U CN207069894 U CN 207069894U CN 201720989711 U CN201720989711 U CN 201720989711U CN 207069894 U CN207069894 U CN 207069894U
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Abstract
The utility model discloses a kind of mine anti-explosion high voltage converter DC filter capacitor electric discharge device.It is made up of No.1 discharge resistance, high-voltage relay coil, No. two discharge resistances, loop of voltage regulation, high-voltage relay normally-closed contact.The device is attempted by frequency converter DC filter capacitor both ends after high-voltage relay coil is connected with several discharge resistances, it is high using high-voltage relay coil pick-up voltage, the low characteristic of release voltage, after main circuit of frequency converter power-off, when DC bus-bar voltage is higher, capacitance voltage is set, when capacitance voltage is smaller, to be discharged by big conductive discharge by small resistor.The characteristics of there is the device high-voltage relay coil to be not required to separately power up, and single discharge resistance power is small, and discharge time is short.
Description
Technical field
The utility model belongs to converter technique field, in particulars relate to a kind of mine anti-explosion high voltage converter DC filtering electricity
Receive electric installation.
Background technology
Explosion-proof high-pressure frequency converter DC filter capacitor still stores very high electricity after major loop power-off on capacitor
Pressure, if without special electric discharge device, the voltage would generally last very long can just decay to below safe voltage, if
Explosion-proof tank is driven before voltage does not drop to safe voltage and carries out operation, does not only exist the risk of personal electric shock injures and deaths, it is also possible to produce
Raw electric spark causes coal mine gas from explosion.If equipment, which breaks down, needs processing of unpacking, in order to which safety just has to wait for enough
The long time, so again can be in vain delay the production time.Therefore frequency converter manufacturer can all set electric capacity in frequency converter
Electric discharge device.Common practice is in frequency converter both ends of filter capacitor and connects one group and be in series with a high-voltage relay normally-closed contact
Discharge resistance realize.When main circuit of frequency converter is powered, the high-voltage relay normally-closed contact disconnects, and makes discharge resistance and filtering
Electric capacity does not form discharge loop；After frequency converter power-off, high-voltage relay normally-closed contact closure, electric capacity will be entered by discharge resistance
Row electric discharge.The advantages of this electric discharge device is that circuit is simple, is easily realized, and shortcoming is must separately to be set to high-voltage relay coil
Power supply, and the pressure-resistant over the ground of the power supply will height.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of mine anti-explosion high voltage converter direct current
Filter capacitor electric discharge device.The device is attempted by the filter of frequency converter direct current after high-voltage relay coil is connected with several discharge resistances
Ripple electric capacity both ends, using the characteristic that high-voltage relay coil pick-up voltage is high, release voltage is low, powered off in main circuit of frequency converter
Afterwards, when DC bus-bar voltage is higher, capacitance voltage is made to be released by big conductive discharge when capacitance voltage drops to high-voltage relay coil
When electric discharge pressure is following, using a part of discharge resistance of normally-closed contact short circuit of high-voltage relay, pass through electric capacity residual voltage small
Conductive discharge, until below safe voltage.The characteristics of device is that high-voltage relay coil is not required to separately power up, single electric discharge electricity
Resistance power is small, and capacitor discharge time is short, while discharge resistance also also serves as dc bus pressure and acted on, and is not required to separately set equalizing resistance
Deng.
The technical solution of the utility model is：A kind of mine anti-explosion high voltage converter DC filter capacitor electric discharge device, by
No.1 discharge resistance（1）, high-voltage relay coil（2）, No. two discharge resistances（3）, divider resistance（4）, voltage-regulator diode（5）With
High-voltage relay normally-closed contact（21）Composition.
The connected mode of the device is：No.1 discharge resistance（1）One end and peripheral associate device in positive direct-current bus
End（F）It is connected, the other end and high-voltage relay coil（2）One end be connected, while and divider resistance（4）One end and voltage stabilizing two
Pole pipe（5）One end be connected；High-voltage relay coil（2）The other end and divider resistance（4）The other end and voltage-regulator diode
（5）The other end be connected, while with No. two discharge resistances（3）One end and high-voltage relay normally-closed contact（21）One end phase
Even；No. two discharge resistances（3）The other end and high-voltage relay normally-closed contact（21）The other end be connected, while with periphery associate
Dc bus end is born in equipment（G）It is connected.
The beneficial effects of the utility model are：High-voltage relay coil is not required to separately power up, and single discharge resistance power is small,
Capacitor discharge time is short, while discharge resistance also also serves as dc bus pressure and acted on, and is not required to separately set equalizing resistance.
Brief description of the drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with the accompanying drawings and the utility model is described in detail in embodiment.
The utility model is a kind of mine anti-explosion high voltage converter DC filter capacitor electric discharge device, by No.1 discharge resistance
（1）, high-voltage relay coil（2）, No. two discharge resistances（3）, divider resistance（4）, voltage-regulator diode（5）It is normal with high-voltage relay
Closed contact（21）Composition.
In the utility model, No.1 discharge resistance（1）One end and peripheral associate device in positive direct-current bus end（F）Phase
Even, the other end and high-voltage relay coil（2）One end be connected, while and divider resistance（4）One end and voltage-regulator diode（5）
One end be connected；High-voltage relay coil（2）The other end and divider resistance（4）The other end and voltage-regulator diode（5）It is another
One end is connected, at the same with No. two discharge resistances（3）One end and high-voltage relay normally-closed contact（21）One end be connected；No. two
Discharge resistance（3）The other end and high-voltage relay normally-closed contact（21）The other end be connected, while with peripheral associate device
Negative dc bus end (G) is connected.
Workflow of the present utility model is as follows：
After main circuit of frequency converter power-off, the high voltage of filter condenser storage passes through positive and negative dc bus (F) and (G) two
End is added on electric discharge device, makes high-voltage relay coil（2）Powered adhesive, while high-voltage relay normally-closed contact（21）Disconnect,
Filter capacitor just passes through No.1 discharge resistance（1）With No. two discharge resistances（3）Carry out repid discharge.Divider resistance（4）And voltage stabilizing
Diode（5）Effect be to ensure the high-voltage relay coil in maximum capacity voltage（2）It is specified that the voltage at both ends is no more than its
Value.When capacitance voltage is down to high-voltage relay coil（2）Release voltage below when, high-voltage relay normally-closed contact（21）Close
Close, No. two discharge resistances（3）It is bypassed, now capacitance voltage just passes through No.1 discharge resistance（1）Electric discharge, until safe voltage with
Under.In addition, electric discharge device, which can also also serve as frequency changer direct current bus, pushes back road.
Claims (1)
- A kind of 1. mine anti-explosion high voltage converter DC filter capacitor electric discharge device, it is characterised in that：The device is discharged by No.1 Resistance（1）, high-voltage relay coil（2）, No. two discharge resistances（3）, divider resistance（4）, voltage-regulator diode（5）And high-voltage relay Device normally-closed contact（21）Composition；No.1 discharge resistance（1）One end and peripheral associate device in positive direct-current bus end（F）Phase Even, the other end and high-voltage relay coil（2）One end be connected, while and divider resistance（4）One end and voltage-regulator diode（5） One end be connected；High-voltage relay coil（2）The other end and divider resistance（4）The other end and voltage-regulator diode（5）It is another One end is connected, at the same with No. two discharge resistances（3）One end and high-voltage relay normally-closed contact（21）One end be connected；No. two Discharge resistance（3）The other end and high-voltage relay normally-closed contact（21）The other end be connected, while with peripheral associate device Negative dc bus end（G）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720989711.5U CN207069894U (en) | 2017-08-09 | 2017-08-09 | Mine anti-explosion high voltage converter DC filter capacitor electric discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720989711.5U CN207069894U (en) | 2017-08-09 | 2017-08-09 | Mine anti-explosion high voltage converter DC filter capacitor electric discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207069894U true CN207069894U (en) | 2018-03-02 |
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ID=61520219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720989711.5U Active CN207069894U (en) | 2017-08-09 | 2017-08-09 | Mine anti-explosion high voltage converter DC filter capacitor electric discharge device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207069894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763895A (en) * | 2018-07-27 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | High-voltage capacitor voltage detection device and inverter |
-
2017
- 2017-08-09 CN CN201720989711.5U patent/CN207069894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763895A (en) * | 2018-07-27 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | High-voltage capacitor voltage detection device and inverter |
| CN110763895B (en) * | 2018-07-27 | 2022-02-11 | 湖南中车时代电动汽车股份有限公司 | High-voltage capacitor voltage detection device and inverter |
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