CN102882390A - Rectifying circuit - Google Patents
Rectifying circuit Download PDFInfo
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- CN102882390A CN102882390A CN2012103666903A CN201210366690A CN102882390A CN 102882390 A CN102882390 A CN 102882390A CN 2012103666903 A CN2012103666903 A CN 2012103666903A CN 201210366690 A CN201210366690 A CN 201210366690A CN 102882390 A CN102882390 A CN 102882390A
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Abstract
The invention discloses a rectifying circuit which comprises a rectifying series circuit consisting of a plurality of rectifying diodes in the same direction by series connection. An anode end of the rectifying series circuit serves as an alternating-current input end, a cathode end of the rectifying series circuit serves as a direct-current output end, two ends of each rectifying diode in the rectifying series circuit are parallelly connected with a voltage-sharing circuit, each voltage-sharing circuit comprises a backward diode and a voltage-limiting circuit in series connection, each backward diode and the corresponding rectifying diode are opposite in direction, the junction capacitance of each backward diode is smaller than or equal to that of each rectifying diode, and a voltage-limiting value of each voltage-limiting circuit is smaller than a maximum backward voltage-withstanding value of each rectifying diode. The rectifying circuit in the embodiment is capable of limiting high-frequency loss and effectively protecting the rectifying diodes from breakdown.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of rectification circuit.
Background technology
Rectification circuit utilizes asymmetrical circuit element to convert alternating current to unidirectional pulsating nature galvanic circuit exactly.
At electronic applications, public known rectification circuit adopts a diode just can consist of as shown in Figure 1.But this only is a common rectification circuit, reach special designing requirement such as higher reverse requirement of withstand voltage, can adopt the design of more piece rectifier diode series connection.As shown in Figure 2, be a rectification circuit schematic diagram that satisfies high requirement of withstand voltage, in Fig. 2, the common port of input/output terminal saves, and only draws two rectifier diode series connection among the figure, can be any joint number during actual the use.In general, it is oppositely withstand voltage that the multitube series connection can obtain to double, but because the parameter of each rectifier diode is (such as reverse leakage electric capacity, junction capacitance or other external environment condition parameter) to cause the reverse dividing potential drop on it be different to difference, this just easily causes certain single tube to puncture, thereby causes that chain reaction causes whole string diode breakdown.For solving above-mentioned drawback, prior art has adopted the measure of all pressing, as shown in Figure 3, Figure 4, rectification circuit comprises the rectification series circuit that is composed in series by a plurality of rectifier diodes in the same way, each rectifier diode is in parallel with a grading resistor or equalizing capacitance, so-called " all pressing " namely allows the reverse dividing potential drop of every joint rectifier diode average, and (generally all rectifier diodes adopt unified model, and namely its maximum reverse is about equally withstand voltage.
Yet, prior art has following problem, such as Fig. 3, and each rectifier diode grading resistor in parallel, all press effect for improving, the resistance of grading resistor is the smaller the better, and (this moment, the backward resistance of diode was in parallel with grading resistor, and grading resistor is less, and diode reverse leak resistance is just more inessential, all-in resistance in parallel just more trends towards grading resistor), yet grading resistor is less, and reverse current is just larger, thereby has increased loss; In like manner, among Fig. 4, rectifier diode is in parallel with equalizing capacitance, improve and all press effect, just must increase equalizing capacitance (thereby so that the junction capacitance of rectifier diode is just more inessential), similarly, increase equalizing capacitance, also just increased reverse recovery time, also increased reverse current, thereby increased high-frequency loss.Therefore, in sort circuit, promoting certain parameter, must to sacrifice another parameter be cost, improve and all press effect, just must increase reverse current and high-frequency loss, therefore, the circuit parameter selection of prior art can face a difficult selection, and can only select the value of a compromise, and soon the backward resistance (junction capacitance) of the value of grading resistor (electric capacity) and rectifier diode is suitable, obviously, compromise scheme is not desirable scheme.
Summary of the invention
The object of the present invention is to provide a kind of rectification circuit, can under the prerequisite of restriction high-frequency loss, improve and all press effect, effectively protect rectifier diode not breakdown.
The embodiment of the invention has proposed a kind of rectification circuit, and described rectification circuit comprises the rectification series circuit that is composed in series by a plurality of rectifier diodes in the same way; The positive terminal of described rectification series circuit is ac input end, and the negative pole end of described rectification series circuit is dc output end;
The two ends of each rectifier diode are parallel with respectively equalizer circuit in the described rectification series circuit, and described equalizer circuit is composed in series by backward diode and pressure limiting circuit; The direction of described backward diode and the opposite direction of described rectifier diode, and the junction capacitance of described backward diode is less than or equal to the junction capacitance of described rectifier diode; The voltage limiting value of described pressure limiting circuit is less than the maximum reverse withstand voltage of described rectifier diode.
Implement the present invention, have following beneficial effect:
The rectification circuit that the embodiment of the invention provides; the two ends of each rectifier diode are parallel with equalizer circuit; equalizer circuit is composed in series by backward diode and pressure limiting circuit; the junction capacitance of backward diode is got over the junction capacitance less than the rectifier diode in parallel with it; the effect of its restriction high-frequency loss is just better; and the voltage limiting value of pressure limiting circuit is lower than the maximum reverse withstand voltage of the rectifier diode in parallel with it, can effectively protect rectifier diode not breakdown.
Description of drawings
Fig. 1 is the circuit diagram of the rectification circuit that only has a rectifier diode that provides of prior art;
Fig. 2 is the circuit diagram of the rectifier diode that is composed in series of a plurality of rectifier diodes that satisfy requirement of withstand voltage that prior art provides;
Fig. 3 is the circuit diagram of the rectification circuit of the rectifier diode that provides of prior art grading resistor in parallel;
Fig. 4 is the circuit diagram of the rectification circuit of the rectifier diode parallel equalizing capacitor that provides of prior art;
Fig. 5 is the circuit diagram of the first embodiment of rectification circuit provided by the invention;
Fig. 6 is the circuit diagram of the second embodiment of rectification circuit provided by the invention;
Fig. 7 is the circuit diagram of the 3rd embodiment of rectification circuit provided by the invention;
Fig. 8 is the circuit diagram of the 4th embodiment of rectification circuit provided by the invention;
Fig. 9 is the circuit diagram of the 5th embodiment of rectification circuit provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention provides a kind of rectification circuit, comprises the rectification series circuit that is composed in series by a plurality of rectifier diodes in the same way; The positive terminal of described rectification series circuit is ac input end, and the negative pole end of described rectification series circuit is dc output end;
The two ends of each rectifier diode are parallel with respectively equalizer circuit in the described rectification series circuit, and described equalizer circuit is composed in series by backward diode and pressure limiting circuit; The direction of described backward diode and the opposite direction of described rectifier diode, and the junction capacitance of described backward diode is less than or equal to the junction capacitance of described rectifier diode; The voltage limiting value of described pressure limiting circuit is less than the maximum reverse withstand voltage of described rectifier diode.
In the invention process; make the junction capacitance of backward diode be less than or equal to the junction capacitance of rectifier diode; can limit high-frequency loss, and the voltage limiting value of pressure limiting circuit is withstand voltage less than the maximum reverse of rectifier diode, can effectively protect rectifier diode not breakdown.
During implementation, the model of all rectifier diodes is identical in the described rectification series circuit.The parameter the such as namely maximum reverse of all rectifier diodes is withstand voltage is identical, thereby makes each equalizer circuit can use the electronic component of identical parameters, is convenient to the practical production of product.Need to prove, the selection of the parameter of each rectifier diode also can be different in the described rectification series circuit, the model that is all rectifier diodes in the described rectification series circuit is not identical, at this moment, the parameter that need to guarantee the rectifier diode that electronic component parameter in each equalizer circuit is in parallel with it adapts.
The model of described rectifier diode is identical with the model of described backward diode or not identical.Backward diode requires much lower than rectifier diode; it is just passable that the withstand voltage and reverse resume speed that only needs to guarantee backward diode is not less than rectifier diode; and the permission of the electric current of backward diode can be more much smaller than rectifier diode; because the electric current of backward diode itself is very little during circuit working; approach zero when desirable; only when entering once in a while protection electric current being arranged, is not normality and enter protection.
Below in conjunction with Fig. 5 ~ Fig. 9, only be composed in series as example by two rectifier diodes in the same way with the rectification series circuit, rectification circuit provided by the invention is described in detail.
Referring to Fig. 5, it is the circuit diagram of the first embodiment of rectification circuit provided by the invention.
The rectification circuit that the first embodiment provides, its rectification series circuit is composed in series by two rectifier diodes in the same way, and the positive terminal of rectification series circuit is ac input end (AC end), and the negative pole end of rectification series circuit is dc output end (DC end).Concrete, as shown in Figure 5, the rectification series circuit comprises rectifier diode D1 and rectifier diode D2, the just very AC end of rectifier diode D1, and the negative pole of rectifier diode D1 connects the positive pole of rectifier diode D2, and the negative pole of rectifier diode D2 is the DC end.
In the first embodiment, the two ends of each rectifier diode are parallel with respectively equalizer circuit in the rectification series circuit, and equalizer circuit is composed in series by backward diode and pressure limiting circuit.Described pressure limiting circuit is comprised of piezo-resistance and Capacitance parallel connection, and the maximum voltage limiting value of described piezo-resistance is less than the maximum reverse withstand voltage of described rectifier diode, and the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode.
Concrete, as shown in Figure 5, the two ends of rectifier diode D1 equalizer circuit in parallel comprises backward diode D3, piezo-resistance R1 and capacitor C 1.Wherein, piezo-resistance R1 and capacitor C 1 compose in parallel pressure limiting circuit.The input of pressure limiting circuit connects the AC end, and the output of pressure limiting circuit connects the negative pole of backward diode D3, and the positive pole of backward diode D3 connects the negative pole of rectifier diode D1.The junction capacitance of backward diode D3 is less than or equal to the junction capacitance of rectifier diode D1, and the maximum voltage limiting value of piezo-resistance R1 is less than the maximum reverse withstand voltage of rectifier diode D1, and the capacitance of capacitor C 1 is greater than the junction capacitance of rectifier diode D1.
The two ends of rectifier diode D2 equalizer circuit in parallel comprises backward diode D4, piezo-resistance R2 and capacitor C 2, and the structure of the equalizer circuit that the structure of this equalizer circuit and the two ends of above-mentioned rectifier diode D1 are in parallel is identical, does not describe in detail at this.
Preferably, backward diode can adopt withstand voltage identical with rectifier diode, but the junction capacitance model more much smaller than rectifier diode (for example, the junction capacitance of backward diode be rectifier diode 1/10th), its current limliting and to suppress the effect of high-frequency loss just better.But be stressed that even backward diode and rectifier diode are same models, to have identical junction capacitance, have too the effect of restriction high-frequency loss.
The below is take rectifier diode D1 shown in Figure 5 and in parallel equalizer circuit thereof as example, and the operation principle of the rectification circuit that the present embodiment is provided describes.And, hereinafter a rectifier diode and equalizer circuit in parallel thereof are called a joint " rectification unit ".
When initial state, capacitor C 1 is 0.When ac input end (AC end) is the interchange positive voltage, rectifier diode D1 conducting, backward diode D3 cut-off, pressure limiting circuit (being the parallel circuits of piezo-resistance R1 and capacitor C 1) is treated as illusory.When the AC end is the interchange negative voltage, rectifier diode D1 cut-off, backward diode D3 conducting, capacitor C 1 is charged to the maximum pressure limiting of piezo-resistance R1, and piezo-resistance R1 presents high-impedance state, is approximately 0 by electric current.In the later normal processes of circuit, the voltage of capacitor C 1 remains on the maximum pressure limiting of piezo-resistance R1.The capacitance of capacitor C 1 is greater than the junction capacitance of rectifier diode D1, its order of magnitude can be taken as 10 ~ 100 times of rectifier diode D1 junction capacitance, can be considered as ac short circuit, and the junction capacitance of backward diode D3 is no more than the junction capacitance of D1, mostly be most 2 times of rectifier diode D1 junction capacitance so obtain the equivalent capacity of single-unit rectification unit, its high frequency performance still can be thought the effect that reaches with prior art quite (because the junction capacitance of the equalizing capacitance order of magnitude that prior art provides and rectifier diode is suitable).When backward diode D3 selected the less type of junction capacitance, more close to the junction capacitance of rectifier diode D1, just more close to the equivalent electric circuit of Fig. 2, this just meaned high-frequency loss still less to equivalent electric circuit to the equivalent capacity of single-unit rectification unit.When improper factor is arranged; electric leakage such as rectifier diode D2 increases, and when causing the reverse voltage burst overvoltage of rectifier diode D1, capacitor C 1 both end voltage raises; but because capacitor C 1 capacity is larger; it also is to raise lentamente that voltage raises, and when surpassing the maximum voltage limiting value of piezo-resistance, piezo-resistance R1 presents low resistance state; flow through the electric current that the burst high pressure produces; prior to rectifier diode D1 reverse-conducting, suppressed the impact of burst high pressure on circuit, protected rectifier diode D1 not breakdown.
Referring to Fig. 6, it is the circuit diagram of the second embodiment of rectification circuit provided by the invention.
Compare with above-mentioned the first embodiment, the difference of the rectification circuit that the second embodiment provides is: described pressure limiting circuit is comprised of voltage stabilizing didoe and Capacitance parallel connection, the direction of described voltage stabilizing didoe is identical with the direction of described rectifier diode, the voltage stabilizing value of described voltage stabilizing didoe is less than the maximum reverse withstand voltage of described rectifier diode, and the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode.
Concrete, as shown in Figure 6, the two ends of rectifier diode D1 equalizer circuit in parallel comprises backward diode D3, voltage stabilizing didoe Z1 and capacitor C 1.Wherein, voltage stabilizing didoe Z1 and capacitor C 1 compose in parallel pressure limiting circuit.The input of pressure limiting circuit connects the AC end, and the output of pressure limiting circuit connects the negative pole of backward diode D3, and the positive pole of backward diode D3 connects the negative pole of rectifier diode D1.The junction capacitance of backward diode D3 is less than or equal to the junction capacitance of rectifier diode D1, and the voltage stabilizing value of voltage stabilizing didoe Z1 is less than the maximum reverse withstand voltage of rectifier diode D1, and the capacitance of capacitor C 1 is greater than the junction capacitance of rectifier diode D1.
The two ends of rectifier diode D2 equalizer circuit in parallel comprises backward diode D4, voltage stabilizing didoe Z2 and capacitor C 2, and the structure of the equalizer circuit that the structure of this equalizer circuit and the two ends of above-mentioned rectifier diode D1 are in parallel is identical, does not describe in detail at this.
The difference of the second embodiment and the first embodiment is to have substituted piezo-resistance with voltage stabilizing didoe; but operation principle is similar; when circuit works; voltage stabilizing didoe presents high-impedance state; the magnitude of voltage at electric capacity two ends is stabilized on the burning voltage of voltage stabilizing didoe, and when the burst high pressure, voltage stabilizing didoe presents low resistance state; current flowing has been protected rectifier diode.
Referring to Fig. 7, it is the circuit diagram of the 3rd embodiment of rectification circuit provided by the invention.
In the 3rd embodiment, the two ends of each rectifier diode are parallel with respectively equalizer circuit in the rectification series circuit, and equalizer circuit is composed in series by backward diode and pressure limiting circuit.Described pressure limiting circuit is composed in parallel by electric capacity and resistance, the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode, described electric capacity charges when described rectifier diode two ends institute making alive is reverse, and the maximum charging voltage value is less than the maximum reverse withstand voltage of described rectifier diode.
Concrete, as shown in Figure 7, the two ends of rectifier diode D1 equalizer circuit in parallel comprises backward diode D3, resistance R 1 and capacitor C 1.Wherein, resistance R 1 and capacitor C 1 compose in parallel pressure limiting circuit.The input of pressure limiting circuit connects the AC end, and the output of pressure limiting circuit connects the negative pole of backward diode D3, and the positive pole of backward diode D3 connects the negative pole of rectifier diode D1.The junction capacitance of backward diode D3 is less than or equal to the junction capacitance of rectifier diode D1, the capacitance of capacitor C 1 is greater than the junction capacitance of rectifier diode D1, capacitor C 1 is charged when rectifier diode D1 two ends institute making alive is reverse, and the maximum charging voltage value is less than the maximum reverse withstand voltage of rectifier diode D1.
The two ends of rectifier diode D2 equalizer circuit in parallel comprises backward diode D4, resistance R 2 and capacitor C 2, and the structure of the equalizer circuit that the structure of this equalizer circuit and the two ends of above-mentioned rectifier diode D1 are in parallel is identical, does not describe in detail at this.
The rectification circuit that the 3rd embodiment provides, its operation principle is as follows:
Illustrate with rectifier diode D1 and the equalizer circuit in parallel with D1, during the circuit normal operation, during initial state, capacitance voltage is zero.When the AC end is interchange positive voltage, rectifier diode D1 conducting, backward diode D3 cut-off.When AC end when exchanging negative voltage, rectifier diode D1 cut-off, backward diode D3 conducting, capacitor C 1 is recharged, it is withstand voltage that the C1 maximum charging voltage is lower than the maximum reverse of rectifier diode.C1 causes voltage drop to descend through the R1 discharge when the AC end is returned to positive voltage again.And AC holds when again occurring exchanging negative voltage, and C1 is charged to maximum voltage again.At first all after date of circuit normal operation, reverse current all is very little, and when the burst high pressure, C1 absorbs pulse voltage and discharges through R1, has also protected rectifier diode D1.In addition, the C1 value specifically can be its 10 times ~ 100 times greater than the junction capacitance of rectifier diode D1, and the junction capacitance of backward diode D3 is selected and should as far as possible less than the junction capacitance of D1, can be reduced preferably high frequency loss.
Referring to Fig. 8, it is the circuit diagram of the 4th embodiment of rectification circuit provided by the invention.
The difference of the 4th embodiment and the first embodiment is, pressure limiting circuit comprises piezo-resistance, and the maximum voltage limiting value of described piezo-resistance is less than the maximum reverse withstand voltage of described rectifier diode; Described piezo-resistance occlusion body electric capacity, the capacitance of described body capacitance is greater than the junction capacitance of described rectifier diode.
Concrete, as shown in Figure 8, the two ends of rectifier diode D1 equalizer circuit in parallel comprises backward diode D3, piezo-resistance R1.Wherein, piezo-resistance R1 is as pressure limiting circuit.The two ends of piezo-resistance R1 connect respectively the negative pole of AC end and backward diode D3, and the positive pole of backward diode D3 connects the negative pole of rectifier diode D1.The junction capacitance of backward diode D3 is less than or equal to the junction capacitance of rectifier diode D1, piezo-resistance comprises the body capacitance of a parallel connection, the capacitance of body capacitance is greater than the junction capacitance of rectifier diode D1, and the maximum voltage limiting value of piezo-resistance R1 is less than the maximum reverse withstand voltage of rectifier diode D1.
The two ends of rectifier diode D2 equalizer circuit in parallel comprises backward diode D4, piezo-resistance R2, and the structure of the equalizer circuit that the structure of this equalizer circuit and the two ends of above-mentioned rectifier diode D1 are in parallel is identical, does not describe in detail at this.
It also is feasible that piezo-resistance does not have the rectification circuit of extra shunt capacitance, and the piezo-resistance in the reality, the reason of manufacturing process are so that its inside itself just comprises a very large doublet electric capacity, about general thousands of the PF of capacity.And the junction capacitance of rectifier diode generally with regard to several to tens PF.Therefore, the operation principle of Fig. 8 and Fig. 5's is similar, repeats no more here.
Referring to Fig. 9, it is the circuit diagram of the 5th embodiment of rectification circuit provided by the invention.
The difference of the 5th embodiment and the second embodiment is, pressure limiting circuit comprises voltage stabilizing didoe, the direction of described voltage stabilizing didoe is identical with the direction of described rectifier diode, the voltage stabilizing value of described voltage stabilizing didoe is less than the maximum reverse withstand voltage of described rectifier diode, and the equivalent electric capacity of described voltage stabilizing didoe is greater than the junction capacitance of described rectifier diode.
Concrete, as shown in Figure 9, the two ends of rectifier diode D1 equalizer circuit in parallel comprises backward diode D3, voltage stabilizing didoe Z1.Wherein, voltage stabilizing didoe Z1 is as pressure limiting circuit.The positive terminal of voltage stabilizing didoe Z1 connects the AC end, and the negative pole of voltage stabilizing didoe Z1 connects the negative pole of backward diode D3, and the positive pole of backward diode D3 connects the negative pole of rectifier diode D1.The junction capacitance of backward diode D3 is less than or equal to the junction capacitance of rectifier diode D1, the capacitance of the equivalent parallel body capacitance of voltage stabilizing didoe Z1 is greater than the junction capacitance of rectifier diode D1, and the voltage stabilizing value of voltage stabilizing didoe Z1 is less than the maximum reverse withstand voltage of rectifier diode D1.
The two ends of rectifier diode D2 equalizer circuit in parallel comprises backward diode D4, voltage stabilizing didoe Z2, and the structure of the equalizer circuit that the structure of this equalizer circuit and the two ends of above-mentioned rectifier diode D1 are in parallel is identical, does not describe in detail at this.
It also is feasible that voltage stabilizing didoe does not have the rectification circuit of extra shunt capacitance, and its operation principle and Fig. 6's is similar, repeats no more here.
The rectification circuit that first embodiment of the invention to the five embodiment provide can be packaged into integrated element.
The rectification circuit that the embodiment of the invention provides; each rectifier diode is parallel with equalizer circuit; equalizer circuit is composed in series by backward diode and pressure limiting circuit; the junction capacitance of backward diode is got over the junction capacitance less than the rectifier diode in parallel with it; the effect of its restriction high-frequency loss is just better; and the voltage limiting value of pressure limiting circuit is lower than the maximum reverse withstand voltage of the rectifier diode in parallel with it, can effectively protect rectifier diode not breakdown.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvement and distortion, these improvement and distortion also are considered as protection scope of the present invention.
Claims (8)
1. a rectification circuit is characterized in that, comprises the rectification series circuit that is composed in series by a plurality of rectifier diodes in the same way; The positive terminal of described rectification series circuit is ac input end, and the negative pole end of described rectification series circuit is dc output end;
The two ends of each rectifier diode are parallel with respectively equalizer circuit in the described rectification series circuit, and described equalizer circuit is composed in series by backward diode and pressure limiting circuit; The direction of described backward diode and the opposite direction of described rectifier diode, and the junction capacitance of described backward diode is less than or equal to the junction capacitance of described rectifier diode; The voltage limiting value of described pressure limiting circuit is less than the maximum reverse withstand voltage of described rectifier diode.
2. rectification circuit as claimed in claim 1, it is characterized in that, described pressure limiting circuit is comprised of piezo-resistance and Capacitance parallel connection, and the maximum voltage limiting value of described piezo-resistance is less than the maximum reverse withstand voltage of described rectifier diode, and the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode.
3. rectification circuit as claimed in claim 1, it is characterized in that, described pressure limiting circuit is comprised of voltage stabilizing didoe and Capacitance parallel connection, the direction of described voltage stabilizing didoe is identical with the direction of described rectifier diode, the voltage stabilizing value of described voltage stabilizing didoe is less than the maximum reverse withstand voltage of described rectifier diode, and the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode.
4. rectification circuit as claimed in claim 1, it is characterized in that, described pressure limiting circuit is composed in parallel by electric capacity and resistance, the capacitance of described electric capacity is greater than the junction capacitance of described rectifier diode, described electric capacity charges when described rectifier diode two ends institute making alive is reverse, and the maximum charging voltage value is less than the maximum reverse withstand voltage of described rectifier diode.
5. rectification circuit as claimed in claim 1 is characterized in that, described pressure limiting circuit comprises piezo-resistance, and the maximum voltage limiting value of described piezo-resistance is less than the maximum reverse withstand voltage of described rectifier diode; Described piezo-resistance occlusion body electric capacity, the capacitance of described body capacitance is greater than the junction capacitance of described rectifier diode.
6. rectification circuit as claimed in claim 1, it is characterized in that, described pressure limiting circuit comprises voltage stabilizing didoe, the direction of described voltage stabilizing didoe is identical with the direction of described rectifier diode, the voltage stabilizing value of described voltage stabilizing didoe is less than the maximum reverse withstand voltage of described rectifier diode, and the equivalent electric capacity of described voltage stabilizing didoe is greater than the junction capacitance of described rectifier diode.
7. such as each described rectification circuit of claim 1 ~ 6, it is characterized in that, the model of all rectifier diodes is identical or not identical in the described rectification series circuit.
8. rectification circuit as claimed in claim 7 is characterized in that, the model of described rectifier diode is identical with the model of described backward diode or not identical.
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| CN110752838A (en) * | 2019-11-11 | 2020-02-04 | 上海联影医疗科技有限公司 | Series diode circuit |
| CN110752838B (en) * | 2019-11-11 | 2023-10-31 | 上海联影医疗科技股份有限公司 | series diode circuit |
| CN113141105A (en) * | 2021-04-25 | 2021-07-20 | 深圳市优优绿能电气有限公司 | Output protection method and device of rectifier module |
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Application publication date: 20130116 |