CN204967783U - Bidirectional thyristor zero passage trigger circuit - Google Patents
Bidirectional thyristor zero passage trigger circuit Download PDFInfo
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- CN204967783U CN204967783U CN201520744505.9U CN201520744505U CN204967783U CN 204967783 U CN204967783 U CN 204967783U CN 201520744505 U CN201520744505 U CN 201520744505U CN 204967783 U CN204967783 U CN 204967783U
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- bidirectional thyristor
- triode
- triode thyristor
- bidirectional triode
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Abstract
The utility model relates to a bidirectional thyristor zero passage trigger circuit, including triode T1, photoelectric coupling bidirectional thyristor driver, bidirectional thyristor BCR and RC resistance -capacitance snubber circuit, triode T1's base inserts pulse signal, and be connected with base bias resistor R1 in triode T1's the base, DC level is connected to triode T1's projecting pole, the input of photoelectric coupling bidirectional thyristor driver is connected to triode T1's collecting electrode, and be connected with collecting electrode supplying resistance R2 on triode T1's the collecting electrode, bidirectional thyristor BCR is connected to the first output of photoelectric coupling bidirectional thyristor driver, its second output connection triggers current -limiting resistor R3, parallelly connected RC resistance -capacitance snubber circuit between two central electrodes of bidirectional thyristor BCR, bidirectional thyristor BCR's gate pole is connected with gate pole resistance R4. The utility model discloses job stabilization, safety, reliability are high, are applicable to single -chip microcomputer control system's interchange load control circuit, can control high -power interchange equipment such as electric stove, AC motor.
Description
Technical field
The utility model relates to alternating current circuit bidirectional triode thyristor triggering technique field, especially a kind of bidirectional triode thyristor zero-cross triggering circuit.
Background technology
Bidirectional triode thyristor is a kind of power semiconductor, also claims bidirectional thyristor, in single-chip computer control system, can be used as power drive device, because bidirectional triode thyristor does not have reverse problem of withstand voltage, control circuit is simple, is therefore particularly suitable for doing AC contact-less switch and uses.What bidirectional triode thyristor was connected is generally all the electrical appliance that some power are larger, and be connected in forceful electric power network, the anti-interference problem of its circuits for triggering is very important, is usually all by photoelectrical coupler, the triggering signal in single-chip computer control system to be loaded into silicon controlled to control pole.For the interference produced when reducing driving power and control machines, the triggering of alternating current circuit bidirectional triode thyristor often adopts zero-cross triggering circuit.It is connect instantaneously near zero or zero that zero cross fired refers at voltage.
Utility model content
The technical problems to be solved in the utility model is: based on the problems referred to above, provides a kind of bidirectional triode thyristor zero-cross triggering circuit.
The utility model solves the technical scheme that its technical problem adopts: a kind of bidirectional triode thyristor zero-cross triggering circuit, comprise triode T1, photoelectric coupling bidirectional triode thyristor driver, bidirectional triode thyristor BCR and RC resistance capaciting absorpting circuit, the base stage access pulse signal of described triode T1, and the base stage of triode T1 is connected with base biasing resistor R1, the emitter of triode T1 connects DC level, the collector electrode of triode T1 connects the input of photoelectric coupling bidirectional triode thyristor driver, and the collector electrode of triode T1 is connected with collector electrode supplying resistance R2, first output of photoelectric coupling bidirectional triode thyristor driver connects bidirectional triode thyristor BCR, its second output connects triggering current-limiting resistance R3, RC resistance capaciting absorpting circuit in parallel between two main electrodes of bidirectional triode thyristor BCR, the gate pole of bidirectional triode thyristor BCR is connected with gate electrode resistance R4.
Further, described RC resistance capaciting absorpting circuit is composed in series by electric capacity C1 and resistance R5.
The beneficial effects of the utility model are: utility model works is stable, safety, reliability are high, is applicable to the AC load control circuit of single-chip computer control system, can controls the high power AC such as electric furnace, alternating current machine equipment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
In figure: 1. photoelectric coupling bidirectional triode thyristor driver, 2. bidirectional triode thyristor BCR, 3.RC resistance capaciting absorpting circuit.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Figure 1, a kind of bidirectional triode thyristor zero-cross triggering circuit, comprise triode T1, photoelectric coupling bidirectional triode thyristor driver 1, bidirectional triode thyristor BCR2 and RC resistance capaciting absorpting circuit 3, the base stage access pulse signal of triode T1, and the base stage of triode T1 is connected with base biasing resistor R1, the emitter of triode T1 connects DC level, the collector electrode of triode T1 connects the input of photoelectric coupling bidirectional triode thyristor driver 1, and the collector electrode of triode T1 is connected with collector electrode supplying resistance R2, first output of photoelectric coupling bidirectional triode thyristor driver 1 connects bidirectional triode thyristor BCR2, its second output connects triggering current-limiting resistance R3, RC resistance capaciting absorpting circuit 3 in parallel between two main electrodes of bidirectional triode thyristor BCR2, the gate pole of bidirectional triode thyristor BCR3 is connected with gate electrode resistance R4.RC resistance capaciting absorpting circuit 3 is composed in series by electric capacity C1 and resistance R5.
Photoelectric coupling bidirectional triode thyristor driver 1, also belongs to the one of photoelectrical coupler, is used for driving bidirectional triode thyristor BCR2 and playing the effect of isolation, and BCR gate electrode resistance R4, prevents false triggering, improves antijamming capability.
When exporting undersuing, triode T1 conducting, the conducting of photoelectric coupling bidirectional triode thyristor driver 1, triggers bidirectional triode thyristor BCR2 conducting, connects AC load.In addition, if when bidirectional triode thyristor connects perceptual AC load, due to supply voltage leading load electric current phase angle, therefore, when load current is zero, supply voltage is reverse voltage, adds the effect of inductive load self induction electromotive force, makes magnitude of voltage that bidirectional triode thyristor BCR2 bears considerably beyond supply voltage.Although bidirectional triode thyristor BCR2 reverse-conducting, easily punctures, therefore bidirectional triode thyristor BCR2 must be made to bear this reverse voltage.A generally RC resistance capaciting absorpting circuit 3 in parallel between bidirectional triode thyristor BCR2 two main electrode, realize bidirectional triode thyristor BCR2 overvoltage protection, electric capacity C1 and resistance R5 forms RC resistance capaciting absorpting circuit 3.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification, must determine its technical scope according to right.
Claims (2)
1. a bidirectional triode thyristor zero-cross triggering circuit, it is characterized in that: comprise triode T1, photoelectric coupling bidirectional triode thyristor driver (1), bidirectional triode thyristor BCR (2) and RC resistance capaciting absorpting circuit (3), the base stage access pulse signal of described triode T1, and the base stage of triode T1 is connected with base biasing resistor R1, the emitter of triode T1 connects DC level, the collector electrode of triode T1 connects the input of photoelectric coupling bidirectional triode thyristor driver (1), and the collector electrode of triode T1 is connected with collector electrode supplying resistance R2, first output of photoelectric coupling bidirectional triode thyristor driver (1) connects bidirectional triode thyristor BCR (2), its second output connects triggering current-limiting resistance R3, RC resistance capaciting absorpting circuit (3) in parallel between two main electrodes of bidirectional triode thyristor BCR (2), the gate pole of bidirectional triode thyristor BCR (2) is connected with gate electrode resistance R4.
2. bidirectional triode thyristor zero-cross triggering circuit according to claim 1, is characterized in that: described RC resistance capaciting absorpting circuit (3) is composed in series by electric capacity C1 and resistance R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520744505.9U CN204967783U (en) | 2015-09-23 | 2015-09-23 | Bidirectional thyristor zero passage trigger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520744505.9U CN204967783U (en) | 2015-09-23 | 2015-09-23 | Bidirectional thyristor zero passage trigger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967783U true CN204967783U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520744505.9U Expired - Fee Related CN204967783U (en) | 2015-09-23 | 2015-09-23 | Bidirectional thyristor zero passage trigger circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204967783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401987A (en) * | 2019-08-14 | 2019-11-01 | 深圳市陆海电子有限公司 | A kind of heater power conditioning circuitry and method |
-
2015
- 2015-09-23 CN CN201520744505.9U patent/CN204967783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401987A (en) * | 2019-08-14 | 2019-11-01 | 深圳市陆海电子有限公司 | A kind of heater power conditioning circuitry and method |
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Legal Events
| 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 |
Granted publication date: 20160113 Termination date: 20160923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |