CN109799389A - A kind of measurement method of high frequency transformer distribution parameter - Google Patents
A kind of measurement method of high frequency transformer distribution parameter Download PDFInfo
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- CN109799389A CN109799389A CN201910195696.0A CN201910195696A CN109799389A CN 109799389 A CN109799389 A CN 109799389A CN 201910195696 A CN201910195696 A CN 201910195696A CN 109799389 A CN109799389 A CN 109799389A
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Abstract
The present invention relates to a kind of measurement methods of high frequency transformer distribution parameter, determine high frequency transformer equivalent circuit；In low frequency secondary side open circuit, impedance analyzer measurement result excitation impedance Z is obtainedm；In high frequency secondary circuit short-circuit, leakage inductance L is measured using impedance analyzerReal 1, similarly when primary side short circuit, obtain leakage inductance LReal 2；In high frequency secondary side open circuit, frequency f1It is Z that Shi Liyong impedance analyzer, which measures result,1, in frequency f2It is Z that Shi Liyong impedance analyzer, which measures result,2；In one secondary circuit short-circuit of high frequency, distribution capacity C between obtaining a secondary side winding is directly measured using impedance analyzerps.It only need to can realize that efficient, convenient, accurate measurement is extracted to high frequency transformer distribution parameter using precision instrument impedance analyzer, help to study distribution parameter effect of the transformer in high frequency；Efficient convenient acquisition distribution parameter, without carrying out the measurement of voltage or current on the transformer, it is often more important that do not have to observation resonance frequency, reduce experimental error, improve measurement accuracy.
Description
Technical field
The present invention relates to a kind of measurement methods of high frequency transformer distribution parameter, belong to power electronics and circuit system analysis
Technical field.
Background technique
With the continuous fast development of science and technology, power electronic technique plays highly important work in today of 21 century
With there is very bright future.High frequency transformer as a part in power electronics, carry electric conversion, transmission and
The effect of security isolation has been widely used for the fields such as computer, communication, industrial processes and aviation.Because it is with small in size,
Light-weight, high-efficient, low, steady performance of generating heat had become especially flourishing state, each major country, the world in recent years
The hot spot of family's research.
Compared with traditional Industrial Frequency Transformer, high frequency transformer work tens even several hundred kHz.However as frequency
The continuous improvement of rate ignore the influence of transformer distribution parameter cannot, mainly include leakage inductance and distribution capacity.So knowing height
The model of the frequency power transformer and distribution parameter for not having to understand specific internal structure and obtaining transformer is particularly important.It is existing
Common method voltage and current is measured by function generator, power amplifier and oscillograph, find resonance frequency, so
After acquire distribution parameter.Because the equipment of needs is more, and resonance phenomena be by observation, so not enough convenience and high-efficiency and error compared with
Greatly.And this measurement method only need to be scanned measurement to transformer using precision instrument impedance analyzer can obtain all points
Cloth parameter.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of the prior art, a kind of measurement of high frequency transformer distribution parameter is provided
Method.
The purpose of the present invention is achieved through the following technical solutions:
A kind of measurement method of high frequency transformer distribution parameter, feature is: the following steps are included:
1) high frequency transformer equivalent circuit is determined；
2) when low frequency secondary side is opened a way, impedance analyzer measurement result excitation impedance Z is obtainedm；
3) in high frequency secondary circuit short-circuit, leakage inductance L is measured using impedance analyzerReal 1, similarly when primary side short circuit, must leak
Feel LReal 2；
4) when high frequency secondary side is opened a way, frequency f1It is Z that Shi Liyong impedance analyzer, which measures result,1, in frequency f2Shi Liyong
It is Z that impedance analyzer, which measures result,2；
5) it in one secondary circuit short-circuit of high frequency, is directly measured using impedance analyzer and is distributed electricity between obtaining a secondary side winding
Hold Cps。
Further, the measurement method of above-mentioned a kind of high frequency transformer distribution parameter, wherein in the step 2), encourage
Magnetoimpedance ZmExpression formula are as follows:
Zm=Rm//jwLm
Magnetizing inductance L is obtained by solvingmWith excitation resistance Rm。
Further, the measurement method of above-mentioned a kind of high frequency transformer distribution parameter, wherein in the step 3), leakage
Feel equation group expression formula are as follows:
By respectively obtaining a secondary side leakage inductance L after corrected CalculationpAnd Ls。
Further, the measurement method of above-mentioned a kind of high frequency transformer distribution parameter, wherein in the step 4), resistance
Anti- equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction；
Primary side distribution capacity C is respectively obtained by calculatingpWith winding resistance Rp, can similarly obtain secondary side distribution capacity Cs
With winding resistance Rs。
Further, the measurement method of above-mentioned a kind of high frequency transformer distribution parameter, including measurement solve high frequency transformation
Distribution capacity between the magnetizing inductance of device, excitation resistance, winding resistance, a secondary side leakage inductance, a secondary side and winding；
1) high frequency transformer equivalent model circuit is determined,
One secondary side winding no-load voltage ratio of transformer is K；Magnetizing inductance is Lm；Excitation resistance is Rm；One secondary side leakage inductance is respectively
LpAnd Ls；One secondary side winding resistance is respectively RpAnd Rs；Primary side distribution capacity, secondary side distribution capacity and primary side around
Distribution capacity is respectively C between groupp、CsAnd Cps；
2) secondary side is opened a way in low frequency, connects primary side two-port using impedance analyzer, directly measurement obtains Zm,
Its impedance expression are as follows:
Zm=Rm//jwLm
Magnetizing inductance L is obtained by calculationm, excitation resistance Rm；
3) in high frequency by secondary circuit short-circuit, primary side two-port is connected using impedance analyzer, directly measurement is leaked
Feel LReal 1, secondary side two-port is connected using impedance analyzer when similarly measuring primary side short circuit, directly measures to obtain leakage inductance LReal 2, leakage
Feel equation group expression formula are as follows:
By respectively obtaining the practical leakage inductance L of a secondary side after corrected CalculationpAnd Ls；
4) in high frequency f1When secondary side is opened a way, using impedance analyzer connection primary side two-port measure to obtain Z1；Only change
Frequency, in high frequency f2When measure Z2；Its impedance equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction；
Primary side distribution capacity C is respectively obtained by calculatingpWith winding resistance Rp, can similarly obtain secondary side distribution capacity Cs
With winding resistance Rs；
5) in high frequency by the short circuit simultaneously of one secondary side of high frequency transformer, and lead is directly surveyed to impedance analyzer respectively
Distribution capacity is C between obtaining a secondary side windingps。
The present invention has significant advantages and beneficial effects compared with prior art, embodies in the following areas:
The present invention need to can only realize efficiently, just high frequency transformer distribution parameter using precision instrument impedance analyzer
Prompt, accurately measurement extraction helps to study distribution parameter effect of the transformer in high frequency.Efficiently convenient acquisition distribution ginseng
Number, without carrying out the measurement of voltage or current on the transformer, it is often more important that do not have to observation resonance frequency, reduce experiment
Error helps to improve measurement accuracy.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that by implementing specific embodiment of the invention understanding.The objectives and other advantages of the invention can be by institute
Specifically noted structure is achieved and obtained in the specification write, claims.
Detailed description of the invention
Fig. 1: high frequency transformer distribution parameter measurement flow chart of the present invention；
Fig. 2: high frequency transformer equivalent-circuit model figure of the present invention；
Fig. 3: short-circuit method primary side leakage inductance of the present invention measures equivalent circuit diagram；
Fig. 4: the present invention removes winding primary side measurement equivalent circuit diagram after magnetic core；
Fig. 5: capacitance measurement equivalent circuit diagram between one secondary side winding of transformer of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, specific implementation is now described in detail
Scheme.
The detailed process of measurement method of the present invention, as shown in Figure 1, the magnetizing inductance including measurement solution high frequency transformer,
Distribution capacity between excitation resistance, winding resistance, a secondary side leakage inductance, a secondary side and winding；
1) high frequency transformer equivalent model circuit is determined, as shown in Figure 2；
Wherein K is one secondary side winding no-load voltage ratio of transformer；LmFor magnetizing inductance；RmFor excitation resistance；LpAnd LsIt is one respectively
Secondary side leakage inductance；RpAnd RsA respectively secondary side winding resistance；Cp、CsAnd CpsIt is primary side distribution capacity, secondary side point respectively
Distribution capacity between cloth capacitor and first side winding；
2) secondary side is opened a way in low frequency, connects primary side two-port using impedance analyzer, directly measurement obtains Zm,
Its impedance expression are as follows:
Zm=Rm//jwLm
Magnetizing inductance L is obtained by calculationm, excitation resistance Rm；
3) in high frequency by secondary circuit short-circuit, primary side two-port is connected using impedance analyzer, directly measurement is leaked
Feel LReal 1, secondary side two-port is connected using impedance analyzer when similarly measuring primary side short circuit, directly measures to obtain leakage inductance LReal 2, leakage
Feel equation group expression formula are as follows:
By respectively obtaining the practical leakage inductance L of a secondary side after corrected CalculationpAnd Ls；
Calculate one secondary leakage inductance L of high frequency transformerpAnd Ls, by high frequency transformer secondary circuit short-circuit, equivalent circuit after short circuit,
As shown in figure 3, it is wherein in parallel with magnetizing inductance after the conversion to primary side of secondary side leakage inductance, after being much larger than conversion due to magnetizing inductance
Leakage inductance, and the two is in parallel, so magnetizing inductance is negligible, and then simplifies；
Obtain actual measurement leakage inductance value LReal 1, leakage inductance value L is surveyed when similarly obtaining primary side short circuitReal 2, then pass through Simultaneous Equations meter
Calculate to obtain primary side leakage inductance LpWith secondary side leakage inductance Ls。
4) in high frequency f1When secondary side is opened a way, using impedance analyzer connection primary side two-port measure to obtain Z1；Only change
Frequency, in high frequency f2When measure Z2；Its impedance equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction；
Primary side distribution capacity C is respectively obtained by calculatingpWith winding resistance Rp, can similarly obtain two
Secondary side distribution capacity CsWith winding resistance Rs；
Calculate one secondary side distribution capacity C of high frequency transformerpAnd CsAn and secondary side winding resistance RpAnd Rs, by high frequency
Circuit Fault on Secondary Transformer open circuit, primary side equivalent circuit is as shown in figure 4, in high band f1It is Z that impedance is measured when frequency1, in high band
f2It is Z that impedance is measured when frequency2；Then primary side distribution capacity C is calculated by Simultaneous EquationspAnd first side winding
Resistance Rp；Secondary lateral capacitance C can similarly be acquiredsWith secondary side winding resistance Rs；
5) in high frequency by the short circuit simultaneously of one secondary side of high frequency transformer, and lead is directly surveyed to impedance analyzer respectively
Distribution capacity is C between obtaining a secondary side windingps；
Distribution capacity C between calculating one secondary winding of high frequency transformerps, by the short circuit simultaneously of one secondary side of high frequency transformer, and
Lead respectively, as shown in figure 5, directly measuring to obtain Cps；
Preferably, excitation impedance Z in the step 1mExpression formula are as follows:
Zm=Rm//jwLm
Preferably, leakage inductance equation group expression formula in the step 2 are as follows:
Preferably, the step 3 middle impedance equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction.
So far, the parameter in high frequency transformer model obtains measurement extraction.
In conclusion the present invention need to can only realize high frequency transformer distribution parameter using precision instrument impedance analyzer
Efficiently, convenient, accurate measurement is extracted, and helps to study distribution parameter effect of the transformer in high frequency.Efficient convenient acquisition
Distribution parameter, without carrying out the measurement of voltage or current on the transformer, it is often more important that do not have to observation resonance frequency, reduce
Experimental error, helps to improve measurement accuracy.
It should be understood that the foregoing is merely the preferred embodiment of the present invention, the power that is not intended to limit the invention
Sharp range；The description above simultaneously, should can be illustrated and implement for the special personage of correlative technology field, thus it is other without departing from
The equivalent change or modification completed under disclosed spirit, should be included in claim.
Claims (5)
1. a kind of measurement method of high frequency transformer distribution parameter, it is characterised in that: the following steps are included:
1) high frequency transformer equivalent circuit is determined；
2) when low frequency secondary side is opened a way, impedance analyzer measurement result excitation impedance Z is obtainedm；
3) in high frequency secondary circuit short-circuit, leakage inductance L is measured using impedance analyzerReal 1, similarly when primary side short circuit, obtain leakage inductance LReal 2；
4) when high frequency secondary side is opened a way, frequency f1It is Z that Shi Liyong impedance analyzer, which measures result,1, in frequency f2Shi Liyong impedance
It is Z that analyzer, which measures result,2；
5) in one secondary circuit short-circuit of high frequency, distribution capacity between obtaining a secondary side winding is directly measured using impedance analyzer
Cps。
2. a kind of measurement method of high frequency transformer distribution parameter according to claim 1, it is characterised in that: the step
2) in, excitation impedance ZmExpression formula are as follows:
Zm=Rm//jwLm
Magnetizing inductance L is obtained by solvingmWith excitation resistance Rm。
3. a kind of measurement method of high frequency transformer distribution parameter according to claim 1, it is characterised in that: the step
3) in, leakage inductance equation group expression formula are as follows:
By respectively obtaining a secondary side leakage inductance L after corrected CalculationpAnd Ls。
4. a kind of measurement method of high frequency transformer distribution parameter according to claim 1, it is characterised in that: the step
4) in, impedance equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction；
Primary side distribution capacity C is respectively obtained by calculatingpWith winding resistance Rp, can similarly obtain secondary side distribution capacity CsWith around
Group resistance Rs。
5. a kind of measurement method of high frequency transformer distribution parameter according to claim 1, it is characterised in that: including measurement
It solves between the magnetizing inductance of high frequency transformer, excitation resistance, winding resistance, a secondary side leakage inductance, a secondary side and winding point
Cloth capacitor；
1) high frequency transformer equivalent model circuit is determined,
One secondary side winding no-load voltage ratio of transformer is K；Magnetizing inductance is Lm；Excitation resistance is Rm；One secondary side leakage inductance is respectively LpWith
Ls；One secondary side winding resistance is respectively RpAnd Rs；Between primary side distribution capacity, secondary side distribution capacity and first side winding
Distribution capacity is respectively Cp、CsAnd Cps；
2) secondary side is opened a way in low frequency, connects primary side two-port using impedance analyzer, directly measurement obtains Zm, resistance
Anti- expression formula are as follows:
Zm=Rm//jwLm
Magnetizing inductance L is obtained by calculationm, excitation resistance Rm；
3) in high frequency by secondary circuit short-circuit, primary side two-port is connected using impedance analyzer, directly measurement obtains leakage inductance LReal 1,
Secondary side two-port is connected using impedance analyzer when similarly measuring primary side short circuit, directly measures to obtain leakage inductance LReal 2, leakage inductance equation
Group expression formula are as follows:
By respectively obtaining the practical leakage inductance L of a secondary side after corrected CalculationpAnd Ls；
4) in high frequency f1When secondary side is opened a way, using impedance analyzer connection primary side two-port measure to obtain Z1；Only change frequency
Rate, in high frequency f2When measure Z2；Its impedance equation group expression formula are as follows:
Wherein w=2 π f, L are first side winding self-induction；
Primary side distribution capacity C is respectively obtained by calculatingpWith winding resistance Rp, can similarly obtain secondary side distribution capacity CsWith around
Group resistance Rs；
5) in high frequency by the short circuit simultaneously of one secondary side of high frequency transformer, and lead directly measures one to impedance analyzer respectively
Distribution capacity is C between secondary side windingps。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910195696.0A CN109799389A (en) | 2019-03-15 | 2019-03-15 | A kind of measurement method of high frequency transformer distribution parameter |
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| CN201910195696.0A CN109799389A (en) | 2019-03-15 | 2019-03-15 | A kind of measurement method of high frequency transformer distribution parameter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208602A (en) * | 2019-06-06 | 2019-09-06 | 福州大学 | One kind being conducive to transformer ultra harmonics transmission characteristic counting circuit and its calculation method |
| CN113917236A (en) * | 2021-10-14 | 2022-01-11 | 杭州电力设备制造有限公司 | Distribution transformer equivalent inductance measuring method, system, device and storage medium |
-
2019
- 2019-03-15 CN CN201910195696.0A patent/CN109799389A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208602A (en) * | 2019-06-06 | 2019-09-06 | 福州大学 | One kind being conducive to transformer ultra harmonics transmission characteristic counting circuit and its calculation method |
| CN113917236A (en) * | 2021-10-14 | 2022-01-11 | 杭州电力设备制造有限公司 | Distribution transformer equivalent inductance measuring method, system, device and storage medium |
| CN113917236B (en) * | 2021-10-14 | 2023-09-19 | 杭州电力设备制造有限公司 | Distribution transformer equivalent inductance measurement method, system, device and storage medium |
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