CN205986810U - Three -phase SCR trigger circuit - Google Patents
Three -phase SCR trigger circuit Download PDFInfo
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- CN205986810U CN205986810U CN201621005274.0U CN201621005274U CN205986810U CN 205986810 U CN205986810 U CN 205986810U CN 201621005274 U CN201621005274 U CN 201621005274U CN 205986810 U CN205986810 U CN 205986810U
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Abstract
The utility model discloses a three -phase SCR trigger circuit, include power module, controller and the three the same silicon controlled rectifier trigger circuit who is connected with the controller, the silicon controlled rectifier trigger circuit all include: the zero passage triggers the opto -coupler subassembly, includes that the first zero passage of establishing ties triggers the opto -coupler and the second zero passage triggers the opto -coupler, bleeder circuit for share that the first zero passage of flowing through triggers the opto -coupler and the second zero passage triggers the voltage of the 6th pin of opto -coupler to the 4th pin, output circuit for be connected with the silicon controlled rectifier, resistance -capacitance snubber circuit for prevent the silicon controlled rectifier spurious triggering, connect in first negative pole port of second silicon controlled rectifier SCR2 and second negative pole port. It has set up that first zero passage triggers the opto -coupler and the second zero passage triggers the effect that opto -coupler no. 1 reaches the partial pressure to establish ties, and two can control the silicon controlled rectifier puts through when the voltage zero passage, and the electric current zero crossing breaks off, does not produce switching in rush current, resistance -capacitance snubber circuit's setting can prevent the too high and spurious triggering of silicon controlled rectifier anode voltage climbing, plays the cushioning effect.
Description
Technical field
This utility model is related to a kind of thyristor throw-cut switch triggering circuit, more specifically, it relates to a kind of three-phase can
Control silicon triggers circuit.
Background technology
At present in electric power compensation system, widely use controllable silicon, this several capacitor fling-cut switch of synchro switch to electric capacity
Carry out switching, in order that electric capacity puts into no surge impact electric current, it is necessary to assure the voltage zero-cross of switch switch ends when connecting
Accurately, this requires the detection of the voltage zero-crossing detection circuit of major loop switch ends accurately and strong antijamming capability.Wherein, exist
It is provided with execution circuit, this execution circuit includes thyristor gating circuit and controllable silicon, for controlled in thyristor throw-cut switch
The voltage zero-cross accuracy requirement of silicon triggers circuit is higher.But existing thyristor gating circuit is carrying out switching to electric capacity
When, it is frequently accompanied by surge impact electric current, affect the stability of whole electric power compensation system.
Utility model content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of three-phase controllable silicon triggering electricity
Road, can control controllable silicon to connect in voltage zero-cross, and current zero-crossing point disconnects, and do not produce inrush phenomenon, improve whole electric power
The stability of compensation system he.
For achieving the above object, this utility model provides following technical scheme：
A kind of three-phase SCR trigger circuit, including power module, controller and three identicals being connected with controller
Thyristor gating circuit, thyristor gating circuit all includes：
Zero cross fired optocoupler assembly, the first zero cross fired optocoupler including series connection and the second zero cross fired optocoupler, described the
1st pin of one zero cross fired optocoupler is connected to power module, and the 2nd pin is connected to the 1st pin of the second zero cross fired optocoupler,
2nd pin of the second zero cross fired optocoupler is connected with the pin of controller；
Bleeder circuit, for sharing the 6th pin flowing through the first zero cross fired optocoupler and the second zero cross fired optocoupler to the 4th
The voltage of pin, the two ends of described bleeder circuit connect the 6th of the first zero cross fired optocoupler and the second zero cross fired optocoupler the respectively
Pin and the 4th pin；
Output circuit is for being connected with controllable silicon, cloudy including first being connected with the 6th pin of the first zero cross fired optocoupler
Extreme mouth and the first control pole port, and the second negative electrode port of being connected with the 4th pin of the second zero cross fired optocoupler and the
Two control pole ports；
Resistance capaciting absorpting circuit, is used for preventing controllable silicon false triggering, is connected to described first negative electrode port and the second cathode terminal
Mouthful.
Further, described bleeder circuit includes the electricity being connected with the 6th pin and the 4th pin of the first zero cross fired optocoupler
Resistance R1, and the resistance R2 that the 6th pin with the second zero cross fired optocoupler and the 4th pin are connected.
Further, described output circuit also includes resistance R3, resistance R4, resistance R5, and wherein, one end of resistance R3 connects
In the 6th pin of the first zero cross fired optocoupler, the other end is connected to one end of the first control pole port and resistance R4, resistance R4's
The other end is connected to the first control pole port；One end of resistance R5 is connected to the 4th pin of the second zero cross fired optocoupler, the other end
It is connected to the second control pole port.
Further, described resistance capaciting absorpting circuit includes electric capacity C1 and resistance R6, and one end of described electric capacity C1 is connected to
One negative electrode port, the other end is connected to one end of resistance R6, and the other end of resistance R6 is connected to the second negative electrode port.
Further, described controllable silicon includes the first controllable silicon and the second controllable silicon, and described first silicon controlled anode is even
It is connected to the second negative electrode port, negative electrode is connected to the first negative electrode port, control pole is connected to the first control pole port；Second controllable silicon
Anode be connected to the first negative electrode port, negative electrode is connected to the second negative electrode port, and control pole is connected to the second control pole port.
Further, described controller adopts the single-chip microcomputer of model STC12C5406AD.
Further, described first zero cross fired optocoupler and the second zero cross fired optocoupler are all using MOC3063.
Compared with prior art, the utility model has the advantages that：
1st, it has been arranged in series the first zero cross fired optocoupler and the second zero cross fired optocoupler to reach the effect of partial pressure, two energy
Controllable silicon is enough controlled to connect in voltage zero-cross, current zero-crossing point disconnects, and does not produce inrush phenomenon；
2nd, the setting of resistance capaciting absorpting circuit, can prevent controllable silicon anode voltage climbing too high and false triggering, play buffering and make
With.
Brief description
Fig. 1 is the schematic diagram of thyristor gating circuit of the present utility model；
Fig. 2 is silicon controlled circuit theory diagrams；
Fig. 3 is the circuit theory diagrams of controller.
Reference：1st, zero cross fired optocoupler assembly；2nd, bleeder circuit；3rd, output circuit；4th, resistance capaciting absorpting circuit.
Specific embodiment
With reference to the accompanying drawings and examples, this utility model is described in detail.
A kind of three-phase SCR trigger circuit, referring to figs. 1 to Fig. 3, be connected including power module, controller and with controller
Three identical thyristor gating circuits.Wherein, power module is powered for controller thyristor gating circuit, and controller adopts
The single-chip microcomputer of model STC12C5406AD.
, this circuit includes the first zero cross fired optocoupler U1 and the second mistake connected taking the thyristor gating circuit of A phase as a example
All using MOC3063, it is internally provided with zero triggering optocoupler U2, the first zero cross fired optocoupler U1 and the second zero cross fired optocoupler U2
Zero passage detection module, when receiving the control signal of input, can not open bidirectional triode thyristor module at once, but wait until
Just trigger bidirectional triode thyristor after zero to be turned on, one can play the effect of partial pressure, triggering controllable silicon that can be safe and reliable,
Two making three-phase be separately controlled, when triggering controllable silicon, there are more more options it is often more important that can when closing a floodgate voltage mistake
Zero is accurate.1st pin of the first zero cross fired optocoupler U1 is connected to power module, and the 2nd pin is connected to the second zero cross fired light
1st pin of coupling U2, the 2nd pin of the second zero cross fired optocoupler U2 is connected with the pin of controller, and in the first zero cross fired
It is connected to the resistance R1 for partial pressure between 6th pin of optocoupler U1 and the 4th pin, likewise, in the second zero cross fired optocoupler
It is connected to the resistance R2 for partial pressure between 6th pin of U2 and the 4th pin.
In addition, being connected with output circuit 3 with the 6th pin of the first zero cross fired optocoupler U1, output circuit 3 includes resistance
R3, resistance R4, resistance R5, the first negative electrode port A_K1, the first control pole port A_G1, the second negative electrode port A_K2 and the second control
Make extreme mouth A_G2, wherein, one end of resistance R3 is connected to the 6th pin of the first zero cross fired optocoupler U1, and the other end is connected to
One end of first control pole port A_G1 and resistance R4, the other end of resistance R4 is connected to the first control pole port A_G1；Resistance
One end of R5 is connected to the 4th pin of the second zero cross fired optocoupler U2, and the other end is connected to the second control pole port A_G2；And can
Control silicon includes the first controllable silicon SCR 1 and the second controllable silicon SCR 2, and the anode of the first controllable silicon SCR 1 is connected to the second negative electrode port
A_K2, negative electrode is connected to the first negative electrode port A_K1, and control pole is connected to the first control pole port A_G1；Second controllable silicon SCR 2
Anode be connected to the first negative electrode port A_K1, negative electrode is connected to the second negative electrode port A_K2, and control pole is connected to the second control
Extreme mouth A_G2.
In addition, being provided with for preventing controllable silicon false triggering between the first negative electrode port A_K1 and the second negative electrode port A_K2
Resistance capaciting absorpting circuit 4, this resistance capaciting absorpting circuit 4 includes electric capacity C1 and resistance R6, and one end of described electric capacity C1 is connected to first
Negative electrode port A_K1, the other end is connected to one end of resistance R6, and the other end of resistance R6 is connected to the second negative electrode port A_K2.When
When controllable silicon turns off, its anode voltage rises too high and can cause false triggering, and the setting of this resistance capaciting absorpting circuit 4 serves buffering and makees
With.
The operation principle of this thyristor gating circuit:
When the signal that controller sends is low level signal, and the first negative electrode port A_K1 and the second negative electrode port is detected
When zero point in voltage between A_K2, the 4th pin of the first zero cross fired optocoupler U1 and the second zero cross fired optocoupler U2 and the 6th is managed
Foot is both turned on, and resistance R1 and resistance R2 are shorted, and therefore electric current flows through the first zero cross fired optocoupler U1 and the second zero cross fired light
Inside coupling U2, when the voltage that the voltage of the first negative electrode port A_K1 is higher than the second negative electrode port A_K2, the first control pole port
A_G1 and the second control pole port A_G2 is high potential, and the control pole of the first controllable silicon SCR 1 and the second controllable silicon SCR 2 has
Trigger current, and the anode of the second controllable silicon SCR 2 is more than negative electrode, the second controllable silicon SCR 2 turns on；As the second negative electrode port A_K2
Voltage be higher than the first negative electrode port A_K1 voltage when, the anode of the first controllable silicon SCR 1 is more than negative electrode, the first controllable silicon
SCR1 turns on.
When the signal that controller sends is high level signal, the first zero cross fired optocoupler U1 and the second zero cross fired optocoupler
4th pin of U2 and the 6th pin all disconnect, and electric current flows through resistance R1 and resistance R2, now, when the electricity of the first negative electrode port A_K1
When pressure is higher than the voltage of the second negative electrode port A_K2, the first control pole port A_G1 is in high level, the second control pole port A_
G2 is in low level, now, the control pole of the first controllable silicon SCR 1 has a trigger current, but now the first negative electrode port A_K1
Voltage is higher than the voltage of the second negative electrode port A_K2, and the first controllable silicon SCR 1 is in reverse blocking state, at this moment the first controllable silicon
SCR1 does not trigger；When the voltage that the voltage of the second negative electrode port A_K2 is higher than the first negative electrode port A_K1, it is similar to and above-mentioned feelings
Condition, is not repeating.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonging under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, some improvement under the premise of without departing from this utility model principle and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. a kind of three-phase SCR trigger circuit, three identicals be connected including power module, controller and with controller can
Control silicon triggers circuit is it is characterised in that thyristor gating circuit all includes：
Zero cross fired optocoupler assembly (1), the first zero cross fired optocoupler including series connection and the second zero cross fired optocoupler, described first
1st pin of zero cross fired optocoupler is connected to power module, and the 2nd pin is connected to the 1st pin of the second zero cross fired optocoupler, the
2nd pin of two zero cross fired optocouplers is connected with the pin of controller；
Bleeder circuit (2), for sharing the 6th pin flowing through the first zero cross fired optocoupler and the second zero cross fired optocoupler to the 4th
The voltage of pin, the two ends of described bleeder circuit (2) connect the first zero cross fired optocoupler and the second zero cross fired optocoupler respectively
6th pin and the 4th pin；
Output circuit (3) is for being connected with controllable silicon, cloudy including first being connected with the 6th pin of the first zero cross fired optocoupler
Extreme mouth and the first control pole port, and the second negative electrode port of being connected with the 4th pin of the second zero cross fired optocoupler and the
Two control pole ports；
Resistance capaciting absorpting circuit (4), is used for preventing controllable silicon false triggering, is connected to described first negative electrode port and the second cathode terminal
Mouthful.
2. three-phase SCR trigger circuit according to claim 1 it is characterised in that described bleeder circuit (2) include with
6th pin of the first zero cross fired optocoupler and the resistance R1 of the 4th pin connection, and the 6th pipe with the second zero cross fired optocoupler
Foot and the resistance R2 of the 4th pin connection.
3. three-phase SCR trigger circuit according to claim 2 is it is characterised in that described output circuit (3) also includes
Resistance R3, resistance R4, resistance R5, wherein, one end of resistance R3 is connected to the 6th pin of the first zero cross fired optocoupler, the other end
It is connected to one end of the first control pole port and resistance R4, the other end of resistance R4 is connected to the first control pole port；Resistance R5
One end be connected to the 4th pin of the second zero cross fired optocoupler, the other end is connected to the second control pole port.
4. three-phase SCR trigger circuit according to claim 3 is it is characterised in that described resistance capaciting absorpting circuit (4) wraps
Include electric capacity C1 and resistance R6, one end of described electric capacity C1 is connected to the first negative electrode port, and the other end is connected to one end of resistance R6,
The other end of resistance R6 is connected to the second negative electrode port.
5. three-phase SCR trigger circuit according to claim 4 it is characterised in that described controllable silicon to include first controlled
Silicon and the second controllable silicon, described first silicon controlled anode is connected to the second negative electrode port, and negative electrode is connected to the first negative electrode port,
Control pole is connected to the first control pole port；Second silicon controlled anode is connected to the first negative electrode port, and negative electrode is connected to second
Negative electrode port, control pole is connected to the second control pole port.
6. three-phase SCR trigger circuit according to claim 1 is it is characterised in that described controller adopts model
The single-chip microcomputer of STC12C5406AD.
7. three-phase SCR trigger circuit according to claim 1 it is characterised in that described first zero cross fired optocoupler and
Second zero cross fired optocoupler is all using MOC3063.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621005274.0U CN205986810U (en) | 2016-08-30 | 2016-08-30 | Three -phase SCR trigger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621005274.0U CN205986810U (en) | 2016-08-30 | 2016-08-30 | Three -phase SCR trigger circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205986810U true CN205986810U (en) | 2017-02-22 |
Family
ID=58038955
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621005274.0U Active CN205986810U (en) | 2016-08-30 | 2016-08-30 | Three -phase SCR trigger circuit |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319315A (en) * | 2018-05-04 | 2018-07-24 | 浙江德力西电器有限公司 | A kind of contactless alternating current voltage stabilizer |
| CN115549440A (en) * | 2022-12-05 | 2022-12-30 | 深圳鹏城新能科技有限公司 | Driving circuit and method for preventing silicon controlled rectifier from being conducted mistakenly in inverter system |
-
2016
- 2016-08-30 CN CN201621005274.0U patent/CN205986810U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319315A (en) * | 2018-05-04 | 2018-07-24 | 浙江德力西电器有限公司 | A kind of contactless alternating current voltage stabilizer |
| CN108319315B (en) * | 2018-05-04 | 2024-01-16 | 浙江德力西电器有限公司 | Contactless ac voltage stabilizer |
| CN115549440A (en) * | 2022-12-05 | 2022-12-30 | 深圳鹏城新能科技有限公司 | Driving circuit and method for preventing silicon controlled rectifier from being conducted mistakenly in inverter system |
| CN115549440B (en) * | 2022-12-05 | 2023-02-07 | 深圳鹏城新能科技有限公司 | Driving circuit and method for preventing silicon controlled rectifier from being conducted mistakenly in inverter system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |