CN204205996U - A kind of multiplex rectification circuit with defencive function - Google Patents
A kind of multiplex rectification circuit with defencive function Download PDFInfo
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- CN204205996U CN204205996U CN201420472700.6U CN201420472700U CN204205996U CN 204205996 U CN204205996 U CN 204205996U CN 201420472700 U CN201420472700 U CN 201420472700U CN 204205996 U CN204205996 U CN 204205996U
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Abstract
The utility model discloses a kind of multiplex rectification circuit with defencive function, comprise transformer, filter capacitor, comprising: bleeder circuit, one end is coupled to transformer, and the other end is coupled to filter capacitor; For to the earial drainage in circuit overcurrent-overvoltage situation; Rectification main circuit, is coupled to transformer, filter capacitor and bleeder circuit; For the rectification to circuit; Rectification main circuit and bleeder circuit are together encapsulated in chip, if when needing to use, full-bridge, half-wave, the mode of connection of rectification circuit of all-wave and effect can be achieved respectively, and any one embodiment, when there is overcurrent or overvoltage in circuit, all can make TVS pipe fast conducting earial drainage, substantially increase the security performance of rectifier diode and filter capacitor.
Description
Technical field
The utility model relates to a kind of rectification circuit, and more particularly, it relates to a kind of multiplex rectification circuit with defencive function.
Background technology
Rectification circuit (rectifying circuit) is converted to AC energy in the circuit of direct current energy.The compositions such as most of rectified current routing transformer, rectification main circuit and filter.It is used widely in the speed governing of DC motor, the field such as excitation regulation, electrolysis, plating of generator.Rectification circuit is made up of main circuit, filter (being generally filter capacitor) and transformer usually.After 20 century 70s, the multiplex silicon rectifier diode of main circuit and thyristor composition.Filter is connected between main circuit and load, for the alternating component in filtering pulsating dc voltage.Whether transformer arranges and is determined on a case-by-case basis.The effect of transformer realizes mating and electric isolution between AC network and rectification circuit between AC-input voltage with VD, is made up of former limit winding, vice-side winding and iron core.Power network supply user's is alternating current, and various radio device needs to use direct current.Rectification, becomes galvanic process alternating current exactly.Utilize the device with unilateal conduction characteristic, the convert alternating current that direction and size can be changed is direct current.
Along with radio device popularizing in our daily life, the design of the electronic installation that many ordinary electronic fans also drop into, but because the rectifier price general charged on market is higher, so many people can use self-designed easy rectification main circuit, so, just can save economy, but due to the shortcoming of a lot of electrophile in electric circuit knowledge or the situation such as the current spike produced due to electrostatic or surge current, the protection of self-designed main circuit to electric capacity and rectifier diode may relatively be short of, so electric capacity and rectifier diode can be caused breakdown in these cases, cause the damage of whole experimental circuit, and, rectification circuit is generally divided into, half-wave, all-wave, bridge-type three kinds, all rectification main circuit will be redesigned when each design circuit, the much unnecessary time can be wasted.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of multiplex rectification circuit with defencive function.
For achieving the above object, the utility model provides following technical scheme: a kind of multiplex rectification circuit with defencive function, and comprise transformer, filter capacitor, comprising: bleeder circuit, one end is coupled to transformer, and the other end is coupled to filter capacitor; For to the earial drainage in circuit overcurrent-overvoltage situation; Rectification main circuit, is coupled to transformer, filter capacitor and bleeder circuit; For the rectification to circuit.
Compared with prior art, the utility model has the advantage of: when the situation of overvoltage or overcurrent appears in rectification main circuit, bleeder circuit can detect the situation of overvoltage or overcurrent, and earial drainage protection can be carried out to rectification main circuit.
The utility model can be set to further: described rectification main circuit is encapsulated in SOT-23-6, encapsulation is provided with the first, second, third, fourth, the 5th, the 6th pin, rectification main circuit comprises: the first rectifier diode, its negative electrode is connected to the first pin and the 6th pin, and its anode is connected to the second pin; Second rectifier diode, its negative electrode is connected to the 5th pin, and its anode is connected to the first pin and the 6th pin; 3rd rectifier diode, its negative electrode is connected to three-prong and the 4th pin, and its anode is connected to the second pin; 4th rectifier diode, its negative electrode is connected to the 5th pin, and its anode is connected to three-prong and the 4th pin; Its withstand voltage is higher than transformer secondary winding both end voltage peak-to-peak value.By four above-mentioned modes of connection of rectifier diode, all demands of half-wave, all-wave, full-bridge rectification can be met by different mode of connections.
Described bleeder circuit is encapsulated in in the same encapsulation of described rectification main circuit, and earial drainage main circuit comprises: two-way TVS pipe, and its negative electrode is connected to the 5th pin, and its anode is connected to the second pin.
And once the pressure reduction of the 5th pin and the second pin is excessive, two-way TVS pipe conducting will be made, complete the effect of earial drainage.
This use is novel can be set to further: above-mentioned first, second, third, fourth rectifier diode is Schottky diode.
Fast conducting or shutoff when such design can make rectification, rectifier diode completes fast conducting and shutoff, makes rectification circuit can adapt to the AC power input of high frequency.
In one embodiment, described 5th pin is coupled to first and couples line terminals, and described second pin is coupled to second and couples line terminals, and described 6th pin is coupled to one end of filtered external electric capacity; The other end of filtered external electric capacity is coupled to described 4th pin.Now whole multiplex rectification circuit can be equivalent to full bridge rectifier, and all can cause the second pin and the larger potential difference of the 5th pin when circuit overcurrent or overvoltage.Earial drainage protection can be carried out to circuit.。
In one embodiment, described second pin is coupled to second and couples line terminals, and described 5th pin is coupled to one end that first couples line terminals and filtered external electric capacity, and the other end of filtered external electric capacity is coupled to described 4th pin.Now whole multiplex rectification circuit can be equivalent to half-wave rectifying circuit.
In one embodiment, described first pin is coupled to first and couples line terminals, described second pin is coupled to the second binding post, and described 3rd coupling pin is coupled to one end of filtered external electric capacity, and the other end of filtered external electric capacity couples the 4th pin and the 5th pin.Now whole multiplex rectification circuit can be equivalent to full-wave rectifying circuit.
Adopt above-mentioned three kinds of embodiments, by bleeder circuit, filter capacitor, the different mode of connection from rectification main circuit, transformer, can according to the real needs of circuit, form three kinds of dissimilar rectification circuits.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment 1;
Fig. 2 is the circuit diagram of the utility model embodiment 2;
Fig. 3 is the circuit diagram of the utility model embodiment 3;
Reference numeral: 1-6, package pins; 7, rectification main circuit; 8, bleeder circuit; D1, the first rectifier diode; D2, the second rectifier diode; D3, the 3rd rectifier diode; D4 the 4th rectifier diode; TVS, two-way TVS pipe.
Embodiment
Embodiment 1 with reference to shown in Fig. 1,
Its rectification main circuit is encapsulated in SOT-23-6, and encapsulation arranges six pins, and six pin numberings are respectively 1-6.
Encapsulation internal circuit: first its negative electrode of rectifier diode D1 is connected to pin one and the 66, and its anode is connected to pin two; Second rectifier diode D2, its negative electrode is connected to pin 5, and its anode is connected to pin one and pin 6; 3rd rectifier diode D3, its negative electrode is connected to pin 3 and pin 4, and its anode is connected to pin two; 4th rectifier diode D4, its negative electrode is connected to pin 5, and its anode is connected to pin 3 and pin 4; Two-way TVS pipe, its negative electrode is connected to pin 5, and its anode is connected to pin two.Observe whole circuit to be not difficult to find; two-way TVS pipe negative electrode is connected on the second rectifier diode D2 negative electrode; its anode is connected on the anode of the first rectifier diode D1; like this can when overcurrent or voltage; two-way TVS pipe meeting reverse-conducting; thus protection diode, its withstand voltage is higher than transformer secondary winding both end voltage peak-to-peak value.So any one rectifier diode all can access external circuit separately.
Package outside circuit:
Described 5th pin is coupled to the transformer secondary Motor Winding Same Name of Ends of transformer secondary winding, and described second pin is coupled to the transformer secondary winding different name end of transformer secondary winding, and described 6th pin is coupled to one end of filtered external electric capacity; The other end of filtered external electric capacity is connected to described 4th pin.Now whole multiplex rectification circuit can be equivalent to full bridge rectifier.
So, first rectifier diode D1 and the 4th rectifier diode D4 constitutes a brachium pontis of full bridge rectifier, second rectifier diode D2 and the 3rd rectifier diode D3 constitutes second brachium pontis of full bridge rectifier, when E2 is positive half cycle, to D1, the 3rd rectifier diode D3 and direction voltage, Dl, the 3rd rectifier diode D3 conducting; Add reverse voltage to the second rectifier diode D2, the 4th rectifier diode D4, the second rectifier diode D2, the 4th rectifier diode D4 end.E2, Dl, filter capacitor, the 3rd rectifier diode D3 power circuit is formed in circuit, at filter capacitor, on form just lower negative half wave rectified voltage, when E2 is negative half period, forward voltage is added to the second rectifier diode D2, the 4th rectifier diode D4, the second rectifier diode D2, the 4th rectifier diode D4 conducting; Add reverse voltage to D1, the 3rd rectifier diode D3, D1, the 3rd rectifier diode D3 end.E2, the second rectifier diode D2, filter capacitor, the 4th rectifier diode D4 power circuit is formed, the commutating voltage of just lower negative other half-wave on being formed on filter capacitor equally in circuit.Once there is overcurrent or voltage two-way TVS pipe reverse-conducting earial drainage, rectifier diode and filter capacitor can be protected so not breakdown.
Embodiment 2 is with reference to shown in Fig. 2, and its encapsulation internal circuit is identical with embodiment 1.
Package outside circuit:
Second pin is coupled to transformer secondary winding different name end, and described 5th pin is coupled to one end of transformer secondary Motor Winding Same Name of Ends and filtered external electric capacity, and the other end of filtered external electric capacity is connected to described 4th pin.Now whole multiplex rectification circuit can be equivalent to half-wave rectifying circuit.
So in E2 to be positive half cycle and transformer upper end be positive lower end for time negative.Now the 3rd rectifier diode D3 bears the conducting of forward voltage face, and E2 is added on load resistance filter capacitor by it, and when E2 is negative half period, transformer secondary output lower end is just; Upper end is negative.At this moment the 3rd rectifier diode D3 bears reverse voltage, not conducting, no-voltage on filter capacitor.So repeatedly go down, the negative half period of alternating current just " is cut ", and only has positive half cycle to load filter capacitor, filter capacitor obtains the voltage of a single dextrad (on just lower negative), reaches the object of halfwave rectifier.
Embodiment 3 is with reference to shown in Fig. 3, and its encapsulation internal circuit is identical with embodiment 1.
Package outside circuit: the first pin is coupled to transformer secondary Motor Winding Same Name of Ends, described second pin is coupled to second, described transformer secondary winding intermediate ends is coupled to one end of filtered external electric capacity, so, transformer secondary winding intermediate ends can be regarded as and vice-side winding coil is divided into two symmetrical windings, thus draw equal and opposite in direction but another termination the 4th pin of opposite polarity two voltage E2a, E2b filtered external electric capacity and the 5th pin.Now whole multiplex rectification circuit can be equivalent to full-wave rectifying circuit.
So in E2 to be positive half cycle and transformer upper end be positive lower end for time negative, E2a is forward voltage to the second rectifier diode D2, the second rectifier diode D2 conducting, and filter capacitor obtains just lower negative voltage; E2b is reverse voltage to the 3rd rectifier diode D3, the 3rd rectifier diode D3 not conducting.When E2 is negative half period, E2b is forward voltage to the 3rd rectifier diode D3, the 3rd rectifier diode D3 conducting, and what filter capacitor obtained remains just lower negative voltage; E2a is reverse voltage to the second rectifier diode D2, the second rectifier diode D2 not conducting.So, the function of full-wave rectifying circuit is also just achieved.
Above-mentioned three kinds of embodiments achieve full-bridge, half-wave, the mode of connection of rectification circuit of all-wave and principle respectively, and any one embodiment, when there is overcurrent or overvoltage in circuit, all can make two-way TVS pipe fast conducting earial drainage, substantially increase the security performance of rectifier diode and filter capacitor.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (7)
1. the multiplex rectification circuit with defencive function, comprises transformer, filter capacitor, it is characterized in that: comprising:
Rectification main circuit, is coupled between transformer and filter capacitor; Alternating current for exporting transformer carries out rectification;
Bleeder circuit, is coupled to rectification main circuit; For to the earial drainage in rectification main circuit overcurrent-overvoltage situation.
2. a kind of multiplex rectification circuit with defencive function according to claim 1; it is characterized in that: described rectification main circuit is encapsulated in SOT-23-6; encapsulation is provided with the first, second, third, fourth, the 5th, the 6th pin, rectification main circuit comprises:
First rectifier diode, its negative electrode is coupled to the first pin and the 6th pin, and its anode is coupled to the node formed between the second pin and bleeder circuit;
Second rectifier diode, its negative electrode is coupled to the 5th node formed between pin and bleeder circuit, and its anode is coupled to the first pin and the 6th pin;
3rd rectifier diode, its negative electrode is coupled to three-prong and the 4th pin, and its anode is coupled to the node formed between the second pin and bleeder circuit;
4th rectifier diode, its negative electrode is coupled to the 5th pin and bleeder circuit, and its anode is coupled to three-prong and the 4th pin.
3. a kind of multiplex rectification circuit with defencive function according to claim 2, is characterized in that: described bleeder circuit is encapsulated in in the same encapsulation of described rectification main circuit, and bleeder circuit comprises:
TVS pipe, its negative electrode is coupled to the 5th pin, and its anode is coupled to the second pin; Its withstand voltage is higher than transformer secondary winding both end voltage peak-to-peak value.
4. the multiplex rectification circuit of band defencive function according to claim 2, is characterized in that: described first, second, third, fourth rectifier diode is Schottky diode.
5. the multiplex rectification circuit of band defencive function according to claim 2, it is characterized in that: described 5th pin is coupled to first and couples line terminals, described second pin is coupled to second and couples line terminals, and described 6th pin is coupled to one end of filtered external electric capacity; The other end of filtered external electric capacity is coupled to described 4th pin.
6. the multiplex rectification circuit of band defencive function according to claim 2; it is characterized in that: described second pin is coupled to second and couples line terminals; described 5th pin is coupled to one end that first couples line terminals and filtered external electric capacity, and the other end of filtered external electric capacity is coupled to described 4th pin.
7. the multiplex rectification circuit of band defencive function according to claim 2; it is characterized in that: described first pin is coupled to first and couples line terminals; described second pin is coupled to the second binding post; described 3rd coupling pin is coupled to one end of filtered external electric capacity, and the other end of filtered external electric capacity couples the 4th pin and the 5th pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420472700.6U CN204205996U (en) | 2014-08-21 | 2014-08-21 | A kind of multiplex rectification circuit with defencive function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420472700.6U CN204205996U (en) | 2014-08-21 | 2014-08-21 | A kind of multiplex rectification circuit with defencive function |
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| CN204205996U true CN204205996U (en) | 2015-03-11 |
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| CN201420472700.6U Expired - Fee Related CN204205996U (en) | 2014-08-21 | 2014-08-21 | A kind of multiplex rectification circuit with defencive function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911052A (en) * | 2017-11-28 | 2018-04-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine and its control circuit |
-
2014
- 2014-08-21 CN CN201420472700.6U patent/CN204205996U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911052A (en) * | 2017-11-28 | 2018-04-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine and its control circuit |
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| 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: 20150311 Termination date: 20190821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |