CN105548724B - The test system and method for smoothing reactor sensibility reciprocal - Google Patents

The test system and method for smoothing reactor sensibility reciprocal Download PDF

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Publication number
CN105548724B
CN105548724B CN201510915615.1A CN201510915615A CN105548724B CN 105548724 B CN105548724 B CN 105548724B CN 201510915615 A CN201510915615 A CN 201510915615A CN 105548724 B CN105548724 B CN 105548724B
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switch
inductance
smoothing reactor
current
capacitance
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CN105548724A (en
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冉瑞刚
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GUANGDONG NRE TECHNOLOGY Co Ltd
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GUANGDONG NRE TECHNOLOGY Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables

Abstract

The present invention provides a kind of test system and method for smoothing reactor sensibility reciprocal, the test system of the smoothing reactor sensibility reciprocal includes pressure regulator, isolated buck transformer, the rectifier bridge for alternating current to be become to direct current, the first filter inductance, the second filter inductance, the first current-limiting inductance, the second current-limiting inductance, the connectivity port for connecting tested smoothing reactor, first switch, second switch, third switch, the first capacitance, the second capacitance and the RCL bridge test instrument adjusted for voltage;The present invention is ingenious directly smoothly to add to tested smoothing reactor without flowing into RCL bridge test instrument every the characteristic for giving capacitance to lead to friendship blocking using inductance is logical by direct current, high frequency carrier is added into tested smoothing reactor without flowing into power grid end, to measure the inductance value of smoothing reactor, the advantageous effect with high certainty of measurement.

Description

The test system and method for smoothing reactor sensibility reciprocal
Technical field
The present invention relates to field of electronic devices, more particularly to a kind of test system and method for smoothing reactor sensibility reciprocal.
Background technology
In the smoothing reactor DC loop later for rectification.The pulse number of rectification circuit is always limited, is exporting DC voltage in always have ripple.This ripple is often harmful, needs to be inhibited by smoothing reactor.Direct current is defeated The current conversion station of electricity is required for that smoothing reactor is housed, and makes the direct current of output close to ideal DC;Electric stake is rushed in new-energy automobile In, smoothing reactor is also essential, filters out the high frequency ripple after its high-frequency PWM controlled rectification.Therefore, smoothing reactor It is one of the important component of power electronics industry.
The inductance value of smoothing reactor is the electric parameter of its core, and most of existing test method is all to use alternating current The test method of anti-device surveys its direct current sensibility reciprocal, that is, by tested reactor string in ac circuit, leads to its equal alternating current Stream measures the pressure drop U for being tested reactor both ends, its sensibility reciprocal value then is calculated by formula L=U/ (ω I).Producer also It is directly with the cold inductance value of measuring of RCL electric bridges when it is used for direct current sensibility reciprocal.If having further investigation to direct current reactor It will know that, the DC magnetization curve of core of reactor differs completely with ac magnetization curve, so, above-mentioned first method The DC inductance tested is inaccurate, and is differed greatly sometimes.Above-mentioned second method is directly measured using RCL, only It is to have measured its unloaded inductance value, the not inductance value in rated current, and user is often what is desired is that when rated current Inductance value.
Therefore, the existing technology needs to be improved and developed
Invention content
It is a primary object of the present invention in view of the drawbacks of the prior art, provide a kind of test system of smoothing reactor sensibility reciprocal System and method.
The present invention solves the technological means that technical problem uses:A kind of test system of smoothing reactor sensibility reciprocal is provided, Include the pressure regulator adjusted for voltage, isolated buck transformer, the rectifier bridge for alternating current to be become to direct current, the first filter Wave inductance, the second filter inductance, the first current-limiting inductance, the second current-limiting inductance, the connecting pin for connecting tested smoothing reactor Mouth, first switch, second switch, third switch, the first capacitance, the second capacitance and RCL bridge test instrument;Institute The input terminal for stating pressure regulator is connect with power grid, and the output end of the pressure regulator and the input terminal of the isolated buck transformer connect It connecing, the output end of the isolated buck transformer is connect with the input terminal of the rectifier bridge, the positive output end of the rectifier bridge, First filter inductance, the first current-limiting inductance, the first switch, first capacitance and the RCL electric bridges are surveyed One end of examination instrument is sequentially connected, the negative output terminal of the rectifier bridge, second filter inductance, second current-limiting inductance, institute The other end for stating second switch, second capacitance and the RCL bridge tests instrument is sequentially connected;The connecting pin Mouthful both ends respectively with the common node and the second switch of the first switch and first capacitance and described The common node of second capacitance connects, the both ends of the third switch respectively with the first switch and first blocking The common node of capacitance and the second switch are connected with the common node of second capacitance.
Further include filter capacitor in the test system of smoothing reactor sensibility reciprocal provided by the invention, the filter capacitor The both ends common node and second filter inductance with first filter inductance and first current-limiting inductance respectively It is connected with the common node of second current-limiting inductance.
In the test system of smoothing reactor sensibility reciprocal provided by the invention, the pressure regulator is carbon brush type pressure regulator.
In the test system of smoothing reactor sensibility reciprocal provided by the invention, the pressure regulator is induction voltage regulator.
In the test system of smoothing reactor sensibility reciprocal provided by the invention, first capacitance with described second every The capacitance of straight capacitance is greater than or equal to 4700 μ F.
In the test system of smoothing reactor sensibility reciprocal provided by the invention, first current-limiting inductance is limited with described second The inductance value of galvanic electricity sense be all higher than or equal to the tested smoothing reactor 100 times of inductance value.
The present invention also provides a kind of tests of the test system based on smoothing reactor sensibility reciprocal described in any one of the above embodiments Method includes the following steps:S1, RCL bridge test instrument is opened, disconnects first switch and second switch and be closed third and opens It closes, the RCL bridge tests instrument is reset.
S2, it keeps the first switch, the second switch to disconnect, and the third is switched and is disconnected, obtain the RCL The unloaded inductance value LO1 of the first of the tested smoothing reactor measured on bridge test instrument;S3, it is closed the first switch, is described Second switch, the third switch remains open, and the pressure regulator and power grid are disconnected, and then obtains the RCL electric bridges and surveys The the second unloaded inductance value LO2 measured on examination instrument;S4, according to the first zero load inductance value LO1 and the first unloaded electricity Inductance change rate Y, wherein Y=(LO2-LO1)/LO1 is calculated in inductance value LO2;S5, adjust pressure regulator input terminal electricity Pressure make the tested smoothing reactor on the electric current that flows through be the tested smoothing reactor rated current, obtain institute at this time State the load inductance value L1 that RCL electric bridges measure;S6, the load inductance value L1 is corrected to obtain according to the inductance change rate Y Final actual inductance value L, wherein L=L1* (1-Y).
The test system and method for implementing a kind of smoothing reactor sensibility reciprocal provided by the invention, there is following advantageous effect:This Invent it is ingenious using inductance it is logical directly every give the logical characteristic for handing over blocking of capacitance smoothly by direct current add to tested smoothing reactor without RCL bridge test instrument is flowed into, high frequency carrier is added into tested smoothing reactor without flowing into power grid end, to measure flat wave electricity The inductance value of anti-device, the advantageous effect with high certainty of measurement.
Description of the drawings
Fig. 1 is the circuit diagram of the test system of the smoothing reactor sensibility reciprocal in one embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
The embodiment of the present invention is described with above attached drawing, but the invention is not limited in above-mentioned specific Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much Form, all of these belong to the protection of the present invention.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases Any and all combinations of the Listed Items of pass.
Fig. 1 show in one embodiment of the present invention 1, a kind of test system of smoothing reactor sensibility reciprocal, feature It is, includes the pressure regulator 100 adjusted for voltage, isolated buck transformer 200, for alternating current to be become the whole of direct current Flow bridge 300, the first filter inductance L1, the second filter inductance L2, the first current-limiting inductance L3, the second current-limiting inductance L4, for connecting The connectivity port of tested smoothing reactor L5, first switch K1, second switch K2, third switch K3, the first capacitance C2, the Two capacitance C3 and RCL bridge test instrument 900.
The input terminal of the pressure regulator 100 is connect with power grid, and the output end of the pressure regulator 100 becomes with the isolated buck The input terminal of depressor 200 connects, and the output end of the isolated buck transformer 200 is connect with the input terminal of the rectifier bridge 300, It is the positive output end of the rectifier bridge 300, the first filter inductance L1, the first current-limiting inductance L3, the first switch K1, described One end of first capacitance C2 and the RCL bridge tests instrument 900 is sequentially connected, the negative output terminal of the rectifier bridge 300, The second filter inductance L2, the second current-limiting inductance L4, the second switch K2, the second capacitance C3 and institute The other end for stating RCL bridge tests instrument 900 is sequentially connected;The both ends of the connectivity port respectively with the first switch K1 and institute The common node and the common node of the second switch K2 and the second capacitance C3 for stating the first capacitance C2 connect Connect, the both ends of the third switch K3 respectively with the common node of the first switch K1 and the first capacitance C2 and The second switch K2 is connected with the common node of the second capacitance C3.
Preferably, the test system of smoothing reactor sensibility reciprocal further includes filter capacitor C1, the both ends of the filter capacitor C1 Respectively with the common node of the first filter inductance L1 and the first current-limiting inductance L3 and the second filter inductance L2 It is connected with the common node of the second current-limiting inductance L4.
Specifically, which can be single-phase or three-phase, can be that carbon brush type pressure regulator is alternatively induction voltage regulator. 100 input terminal of pressure regulator gets access to grid, which is used to the voltage that pressure regulator 100 exports becoming low-voltage High current is simultaneously exported to rectifier bridge 300.Rectifier bridge 300 can be controlled rectification or uncontrollable rectification, be used for alternating current buckling It is changed to the direct current of low-voltage and high-current, such as DC10V/5000A etc..The direct current of the rectifier bridge 300 output passes through the first filter Wave inductance L1 and the second filter inductance L2 filters out ripple and obtains the DC source of relative smooth.In order to measure tested smoothing reactor L5 Inductance value, the carrier wave of 900 exportable different frequency of RCL bridge tests instrument and different voltages amplitude to tested smoothing reactor On L5, RCL bridge tests instrument 900 is by detecting and calculating the carrier signal added on tested smoothing reactor L5, you can obtains The direct current sensibility reciprocal of tested smoothing reactor L5.
Direct current is directly smoothly added to tested flat wave reactance by the present invention using inductance is logical every the characteristic for giving capacitance to lead to friendship blocking Device L5 adds to tested smoothing reactor L5 without galvanic electricity net end without flowing into RCL bridge tests instrument 900, by high frequency carrier, below It is further analyzed.
When DC current, which is added, is tested smoothing reactor L5, due to the first capacitance C2's and the second capacitance C3 In the presence of direct current can not flow into RCL bridge tests instrument 900, protect RCL bridge tests instrument 900;Similarly, RCL bridge tests instrument When on 900 output different frequencies and the carrier wave to tested smoothing reactor L5 of different voltages amplitude, while it being also applied to net end, But due to the presence of the first current-limiting inductance L3 and the second current-limiting inductance L4, high frequency carrier is prevented to add to electricity to greatest extent Net end.
Detected high-frequency carrier signal is substantially all for tested smoothing reactor L5 on RCL bridge tests instrument 900 On pressure drop U~, RCL electric bridges 900 by detection obtain high frequency pressure drop U~, high-frequency current I~, frequency f~, according to L=U~/ The load inductance L of tested smoothing reactor L5 can be calculated in (ω I~).All test signal detections and calculating are in RCL It is voluntarily completed inside bridge test instrument 900.
Preferably, in order to make the high frequency carrier of RCL bridge tests instrument 900 more smoothly add to tested smoothing reactor L5 On, the first capacitance C2 and the second capacitance C3 usually choose the bulky capacitor more than or equal to 4700 μ F.In order to prevent height Frequency carrier wave adds to tested smoothing reactor L5 without flowing into power grid end, usually takes the first current-limiting inductance L3 and the second current-limiting inductance L4 Inductance value be greater than or equal to 100 times of the inductance value of tested smoothing reactor L5.In order to be more favorable for testing, RCL bridge tests The high frequency carrier that instrument 900 exports, which is usually chosen, is greater than or equal to 1KHz.
Further, it in order to reduce or eliminate the influence of connection line as possible, after RCL bridge tests instrument 900 is reset, is tested flat Wave reactor L5 is first not connected to current supply circuit, i.e. first switch K1, second switch K2 and third are opened K3 and disconnected.
The present invention also provides a kind of tests of the test system based on smoothing reactor sensibility reciprocal described in any one of the above embodiments Method includes the following steps:S1, RCL bridge test instrument is opened, disconnects first switch and second switch and be closed third and opens It closes, the RCL bridge tests instrument is reset;S2, the first switch, the second switch is kept to disconnect, and by described the Three switches disconnect, and obtain the first unloaded inductance value LO1 of the tested smoothing reactor measured on the RCL bridge tests instrument; S3, it is closed the first switch, the second switch, the third switch remains open, and the pressure regulator is broken with power grid It opens, then obtains the unloaded inductance value LO2 of second measured on the RCL bridge tests instrument;S4, according to the described first unloaded electricity Inductance change rate Y, wherein Y=(LO2-LO1)/LO1 is calculated in inductance value LO1 and the first zero load inductance value LO2; S5, the input terminal for adjusting pressure regulator voltage make the tested smoothing reactor on the electric current that flows through be tested flat wave electricity The rated current of anti-device obtains the load inductance value L1 that the RCL electric bridges measure at this time;S6, according to the inductance change rate Y The load inductance value L1 is corrected to obtain final actual inductance value L, wherein L=L1* (1-Y).
Preferably, in order to make the high frequency carrier of RCL bridge tests instrument 900 more smoothly add to tested smoothing reactor L5 On, the first capacitance C2 and the second capacitance C3 usually choose the bulky capacitor more than or equal to 4700 μ F.In order to prevent height Frequency carrier wave adds to tested smoothing reactor L5 without flowing into power grid end, usually takes the first current-limiting inductance L3 and the second current-limiting inductance L4 Inductance value be greater than or equal to 100 times of the inductance value of tested smoothing reactor L5.In order to be more favorable for testing, RCL bridge tests The high frequency carrier that instrument 900 exports, which is usually chosen, is greater than or equal to 1KHz.
Further, it in order to reduce or eliminate the influence of connection line as possible, after RCL bridge tests instrument 900 is reset, is tested flat Wave reactor L5 is first not connected to current supply circuit, i.e. first switch K1, second switch K2 and third switch K3 are disconnected.
It should be noted that the technical solution of each embodiment of the present invention can be combined with each other, but must be with this The technical staff in field can be implemented as basis, when the combination of technical solution occur it is conflicting or when cannot achieve should people recognize Combination for this technical solution is not present, also not the present invention claims protection domain within.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (7)

1. a kind of test system of smoothing reactor sensibility reciprocal, which is characterized in that include the pressure regulator adjusted for voltage, isolation drop Pressure transformer, the rectifier bridge for alternating current to be become to direct current, the first filter inductance, the second filter inductance, the first current limliting electricity Sense, the second current-limiting inductance, the connectivity port for connecting tested smoothing reactor, first switch, second switch, third switch, First capacitance, the second capacitance and RCL bridge test instrument;The input terminal of the pressure regulator is connect with power grid, described The output end of pressure regulator is connect with the input terminal of the isolated buck transformer, the output end of the isolated buck transformer and institute State the input terminal connection of rectifier bridge, it is the positive output end of the rectifier bridge, first filter inductance, the first current-limiting inductance, described One end of first switch, first capacitance and the RCL bridge tests instrument is sequentially connected, and bearing for the rectifier bridge is defeated Outlet, second filter inductance, second current-limiting inductance, the second switch, second capacitance and described The other end of RCL bridge test instrument is sequentially connected;The both ends of the connectivity port respectively with the first switch and described first The common node of capacitance and the second switch are connected with the common node of second capacitance, and the third is opened The both ends of pass respectively with the common node and the second switch of the first switch and first capacitance and described The common node of second capacitance connects.
2. the test system of smoothing reactor sensibility reciprocal according to claim 1, which is characterized in that further include filter capacitor, The both ends of the filter capacitor respectively with the common node of first filter inductance and first current-limiting inductance and described Second filter inductance is connected with the common node of second current-limiting inductance.
3. the test system of smoothing reactor sensibility reciprocal according to claim 1 or 2, which is characterized in that the pressure regulator is Carbon brush type pressure regulator.
4. the test system of smoothing reactor sensibility reciprocal according to claim 3, which is characterized in that the pressure regulator is induction Formula pressure regulator.
5. the test system of smoothing reactor sensibility reciprocal according to claim 1, which is characterized in that first capacitance It is greater than or equal to 4700 μ F with the capacitance of second capacitance.
6. the test system of smoothing reactor sensibility reciprocal according to claim 1, which is characterized in that first current-limiting inductance Be all higher than with the inductance value of second current-limiting inductance or equal to the tested smoothing reactor 100 times of inductance value.
7. a kind of test method of the test system based on claim 1-6 any one of them smoothing reactor sensibility reciprocals, special Sign is to include the following steps:
S1, RCL bridge test instrument is opened, disconnect first switch and second switch and is closed third switch, by the RCL electric bridges Tester is reset;
S2, it keeps the first switch, the second switch to disconnect, and the third is switched and is disconnected, obtain the RCL electric bridges The unloaded inductance value LO1 of the first of the tested smoothing reactor measured on tester;S3, the first switch, described second are closed Switch, the third switch remains open, and the pressure regulator and power grid are disconnected, and then obtains the RCL bridge tests instrument On the second unloaded inductance value LO2 for measuring;
S4, inductance change rate Y is calculated according to the first zero load inductance value LO1 and the first zero load inductance value LO2, Wherein Y=(LO2-LO1)/LO1;
S5, the input terminal for adjusting pressure regulator voltage make the tested smoothing reactor on the electric current that flows through be that this is tested flat wave The rated current of reactor obtains the load inductance value L1 that the RCL electric bridges measure at this time;
S6, the load inductance value L1 is corrected according to the inductance change rate Y to obtain final actual inductance value L, wherein L= L1*(1-Y)。
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