CN113359925A - Direct current source realized by addition principle and control method thereof - Google Patents
Direct current source realized by addition principle and control method thereof Download PDFInfo
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- CN113359925A CN113359925A CN202110720366.6A CN202110720366A CN113359925A CN 113359925 A CN113359925 A CN 113359925A CN 202110720366 A CN202110720366 A CN 202110720366A CN 113359925 A CN113359925 A CN 113359925A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
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Abstract
The invention provides a direct current source realized by an addition principle and a control method thereof, wherein the direct current source comprises: the three-phase alternating current power module and the rectification module; the three-phase alternating current power module is electrically connected with the rectification module; wherein the three-phase alternating current power module comprises: the device comprises a signal input unit, a signal processing unit, a waveform fitting unit and an alternating current power amplifier unit; the signal input unit is electrically connected with the signal processing unit, the signal processing unit is electrically connected with the waveform fitting unit, the waveform fitting unit is electrically connected with the alternating current power amplifier unit, and the alternating current power amplifier unit is electrically connected with the rectifying module. The invention provides a design by directly utilizing a high-voltage low-current power amplifier, which can save the cost of the power amplifier; the current source provided by the invention has no direct current component for the output of the mutual inductor, and has good zero stability.
Description
Technical Field
The invention relates to the technical field of test instruments and meters, in particular to a direct current source realized by an addition principle and a control method thereof.
Background
Along with the development of the electric automobile industry in China, the remaining quantity of electric automobile charging piles continuously rises, a plurality of manufacturers release charging pile check meters, and the use quantity of the charging pile check meters is also continuously increased. When the check meter is detected, controllable direct current and direct voltage for detection need to be provided. The direct current power supply for detecting the direct current charging pile calibrator needs 250A to the maximum, and the direct power amplification of chips is generally adopted in the industry to generate the required direct current in a mode of connecting a large number of power amplification chips in parallel. The invention provides a method and a circuit for generating direct current, which can utilize the existing alternating current source to generate the direct current required by detection.
The direct current source of the existing charging pile calibrator calibrating device is generally generated by adopting a direct current power amplifier, a power amplifying circuit is generally generated by adopting a linear integrated power amplifier or a discrete device power amplifier, and a feedback link is generally generated by adopting a shunt for sampling or a zero-magnetic-flux alternating current-direct current sensor for sampling. However, the prior art has the following technical problems:
1. the design of a high-power large-current direct-current source is difficult, a common direct-current power amplifier directly generates 250A direct-current output by connecting a plurality of chips in parallel, the working current of a common power amplifier chip is 10A, 25 chips are required to be connected in parallel, and meanwhile, the efficiency is low due to pipe pressure drop (the differential pressure between the power supply of the power source and the output voltage), the heat is serious, and the design of the power amplifier is complex.
2. The direct current feedback sampling is difficult, if a shunt is adopted for sampling, because voltage drop exists on a sampling resistor, if the sampling voltage is large, large power needs to be consumed, and the temperature drift caused by the large sampling power can reduce the output precision. If the high-accuracy resistance sampling is used, the cost is very high and is measured in tens of thousands, if the alternating current and direct current zero-flux sampling is adopted, the cost is high, the price of the zero-flux alternating current and direct current sensor is about 100 times that of the alternating current transformer, and the stability of a feedback loop is poor due to the fact that the bandwidth of the zero-flux alternating current and direct current transformer is limited.
Disclosure of Invention
The invention provides a direct current source realized by an addition principle and a control method thereof, which realize the conversion of a three-phase isolated alternating current source into a single-phase direct current standard source.
A first aspect of the present invention provides a dc current source implemented by an additive principle, comprising:
the three-phase alternating current power module and the rectification module; the three-phase alternating current power module is electrically connected with the rectification module;
wherein the three-phase alternating current power module comprises: the device comprises a signal input unit, a signal processing unit, a waveform fitting unit and an alternating current power amplifier unit; the signal input unit is electrically connected with the signal processing unit, the signal processing unit is electrically connected with the waveform fitting unit, the waveform fitting unit is electrically connected with the alternating current power amplifier unit, and the alternating current power amplifier unit is electrically connected with the rectifying module.
Further, the ac power amplifier unit includes: the power amplifier comprises a first alternating current power amplifier unit, a second alternating current power amplifier unit and a third alternating current power amplifier unit; the rectification module includes: the first rectifying unit, the second rectifying unit and the third rectifying unit;
the input end of the first alternating current power amplifier unit, the input end of the second alternating current power amplifier unit and the input end of the third alternating current power amplifier unit are respectively and electrically connected with the waveform fitting unit;
the output end of the first alternating current power amplification unit is electrically connected with the input end of the first rectification unit, the output end of the second alternating current power amplification unit is electrically connected with the input end of the second rectification unit, and the output end of the third alternating current power amplification unit is electrically connected with the input end of the third rectification unit;
the output end of the first rectifying unit, the output end of the second rectifying unit and the output end of the third rectifying unit are isolated from each other.
Further, the signal input unit is electrically connected with the signal processing unit, specifically:
the signal input unit is connected with the signal processing unit through 4 identical IO lines.
Further, the signal processing unit is electrically connected with the waveform fitting unit, specifically:
the signal processing unit is connected with the waveform fitting unit through a serial peripheral interface.
Further, the signal input unit is an input keyboard, the signal processing unit is a processor, and the rectifying module is a rectifying bridge circuit with an output current of 200A and a threshold voltage of 0.8V or a unidirectional rectifying bridge circuit with an output current exceeding 200A.
A second aspect of the present invention provides a method for controlling a dc current source implemented by any one of the above-mentioned addition principles, comprising:
the signal input unit transmits the acquired input signal to the signal processing unit;
the signal processing unit carries out waveform fitting calculation on the input signal and inputs a fitting calculation signal subjected to the waveform fitting calculation to the waveform fitting unit;
the waveform fitting unit is used for fitting the fitting calculation signal, performing digital-to-analog conversion on the fitted signal, and inputting the waveform fitting signal subjected to digital-to-analog conversion to the AC power amplification unit;
the alternating current power amplification unit is used for amplifying the waveform fitting signal and inputting the amplified signal subjected to signal amplification to the rectification module;
the rectification module is used for rectifying the amplified signal and outputting a rectified direct current signal.
Further, the inputting the waveform fitting signal after the digital-to-analog conversion into an ac power amplifier unit, where the ac power amplifier unit performs signal amplification processing on the waveform fitting signal, includes:
dividing the waveform fitting signal subjected to digital-to-analog conversion into a first waveform fitting signal, a second waveform fitting signal and a third waveform fitting signal;
inputting the first waveform fitting signal to a first alternating current power amplification unit for signal amplification processing to obtain a first amplified signal;
inputting the second waveform fitting signal to a second alternating current power amplification unit for signal amplification processing to obtain a second amplified signal;
and inputting the third waveform fitting signal to a third alternating current power amplification unit for signal amplification processing to obtain a third amplified signal.
Further, the inputting the amplified signal after signal amplification to a rectifying module, where the rectifying module performs rectification processing on the amplified signal, includes:
inputting the first amplified signal to a first rectifying unit for rectifying to obtain a first rectified signal;
inputting the second amplified signal to a second rectifying unit for rectifying to obtain a second rectified signal;
and inputting the third amplified signal to a third rectifying unit for rectifying to obtain a third rectified signal.
Further, the first rectified signal, the second rectified signal, and the third rectified signal are isolated from each other.
Further, an initial phase of the trapezoidal wave of the first amplified signal is 0, and a waveform of the first amplified signal in one period is calculated by the following formula:
wherein, T is a period of time,and T is 20mS, T is any time within the period T, ia (T) is the first amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Further, the initial phase of the trapezoidal wave of the second amplified signal is
The waveform of the second amplified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, ib (T) is a second amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Further, the initial phase of the trapezoidal wave of the third amplified signal is
The waveform of the third amplified signal in one period is calculated by the following formula:
where T is a period, T is 20mS, T is any time within the period T, ic (T) is a third amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Further, the waveform of the first rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, idca (T) is a first rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Further, the waveform of the second rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, idcb (T) is a second rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Further, the waveform of the third rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, Idcc (T) is a third rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides a direct current source realized by an addition principle and a control method thereof, wherein the direct current source comprises: the three-phase alternating current power module and the rectification module; the three-phase alternating current power module is electrically connected with the rectification module; wherein the three-phase alternating current power module comprises: the device comprises a signal input unit, a signal processing unit, a waveform fitting unit and an alternating current power amplifier unit; the signal input unit is electrically connected with the signal processing unit, the signal processing unit is electrically connected with the waveform fitting unit, the waveform fitting unit is electrically connected with the alternating current power amplifier unit, and the alternating current power amplifier unit is electrically connected with the rectifying module. The direct current source realized by the addition principle can be directly designed by using a high-voltage low-current power amplifier, so that the cost of the power amplifier can be saved; the current source provided by the invention has no direct current component for the output of the mutual inductor, and has good zero stability.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a diagram of an apparatus for implementing a dc current source according to an addition principle provided by an embodiment of the present invention;
fig. 2 is a diagram of an apparatus for implementing a dc current source according to an addition principle provided by another embodiment of the present invention;
fig. 3 is a diagram of an apparatus for implementing a dc current source according to an addition principle provided by another embodiment of the present invention;
FIG. 4 is a schematic diagram of a single-phase rectifier bridge concept provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of the rectifier module concept provided by one embodiment of the present invention;
FIG. 6 is a waveform diagram of a rectified signal and an amplified signal provided by an embodiment of the present invention;
fig. 7 is a flowchart of a method for controlling a dc current source implemented by an addition principle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
A first aspect.
Referring to fig. 1-3, the present invention provides a dc current source implemented by an additive principle, including:
a three-phase alternating current power module 100 and a rectification module 200; the three-phase ac current power module 100 is electrically connected to the rectifier module 200.
The three-phase ac current power module 100 includes: signal input unit 10, signal processing unit 20, waveform fitting unit 30 and ac power amplifier unit 40. The signal input unit 10 is electrically connected to the signal processing unit 20, the signal processing unit 20 is electrically connected to the waveform fitting unit 30, the waveform fitting unit 30 is electrically connected to the ac power amplifying unit 40, and the ac power amplifying unit 40 is electrically connected to the rectifying module 200.
In a specific embodiment, the ac power amplifier unit 40 includes: a first ac power amplifier unit 41, a second ac power amplifier unit 42, and a third ac power amplifier unit 43; the rectification module 200 includes: a first rectifying unit 21, a second rectifying unit 22, and a third rectifying unit 23. The input end of the first ac power amplifier unit 41, the input end of the second ac power amplifier unit 42 and the input end of the third ac power amplifier unit 43 are electrically connected to the waveform fitting unit 30, respectively; the output end of the first ac power amplifier unit 41 is electrically connected to the input end of the first rectifying unit 21, the output end of the second ac power amplifier unit 42 is electrically connected to the input end of the second rectifying unit 22, and the output end of the third ac power amplifier unit 43 is electrically connected to the input end of the third rectifying unit 23; the output end of the first rectifying unit 21, the output end of the second rectifying unit 22 and the output end of the third rectifying unit 23 are isolated from each other.
The signal input unit 10 is connected to the signal processing unit 20 through 4 identical IO lines. The signal processing unit 10 is connected to the waveform fitting unit 30 through a serial peripheral interface.
In another embodiment, the signal input unit 10 is an input keyboard, the signal processing unit 20 is a processor, and the rectifier module 200 is a rectifier bridge circuit with an output current of 200A and a threshold voltage of 0.8V or a unidirectional rectifier bridge circuit with an output current exceeding 200A.
The direct current source realized by the addition principle can be directly designed by using a high-voltage low-current power amplifier, so that the cost of the power amplifier can be saved; the current source provided by the invention has no direct current component for the output of the mutual inductor, and has good zero stability.
In a specific embodiment, the signal processing unit is a processor, and is configured to be responsible for calculating the waveform fitting and send the waveform fitting to the waveform fitting unit through an SPI (serial peripheral interface) interface; preferably, the processor employs BF533 by ADI corporation (adeno semiconductor). The waveform fitting unit is used for receiving a waveform of one period of the processor through the SPI and realizing digital-to-analog conversion. The AC power amplifier unit includes: the power amplifier comprises a first alternating current power amplifier unit, a second alternating current power amplifier unit and a third alternating current power amplifier unit, wherein the alternating current power amplifier unit is used for realizing cross-over and amplification output, the output is driven by using a transformer principle, and the output of the alternating current power amplifier modules is isolated from each other. The rectification module includes: the first rectifying unit, the second rectifying unit and the third rectifying unit preferably use a rectifying bridge module MDQ200A of the salon company, which can output a signal with an output current of 200A and a threshold voltage of 0.8V. In another preferred embodiment, the first rectifying unit, the second rectifying unit and the third rectifying unit all use other types of single-phase bridge rectifier modules exceeding 200A. The principle of the single-phase rectifier bridge is shown in fig. 4, the single-phase rectifier bridge is composed of four unidirectional diodes D1, D2, D3 and D4, and the unidirectional conductivity of the diodes is utilized to convert alternating current into direct current. The rectifier module is used for automatically changing the trapezoidal wave of the three-phase alternating current into a direct current output signal, as shown in fig. 5, three-phase direct currents after finishing are common ground, the three-phase current outputs are required to be mutually isolated, if the three-phase current outputs are not isolated, a rectifier diode is short-circuited, rectification fails, and superposition output cannot be realized. The signal input unit is a keyboard, is connected with the processor through 4 general IO lines, realizes the keyboard input, inputs 1 ~ 250A's current value, outputs the integer current model.
A second aspect.
Referring to fig. 7, the present invention provides a control method for controlling a dc current source implemented by an addition principle according to any one of the first aspect, including:
and S10, the signal input unit transmits the acquired input signal to the signal processing unit.
And S20, the signal processing unit performs waveform fitting calculation on the input signal, and inputs the fitting calculation signal subjected to the waveform fitting calculation to the waveform fitting unit.
And S30, the waveform fitting unit performs fitting processing on the fitting calculation signal, performs digital-to-analog conversion on the fitted signal, and inputs the waveform fitting signal subjected to digital-to-analog conversion to the AC power amplification unit.
And S40, the alternating current power amplification unit amplifies the waveform fitting signal and inputs the amplified signal to the rectification module.
And S50, the rectification module rectifies the amplified signal and outputs a rectified direct current signal.
In a specific embodiment, the inputting the waveform fitting signal subjected to digital-to-analog conversion to an ac power amplifier unit, where the ac power amplifier unit performs signal amplification processing on the waveform fitting signal, includes:
dividing the waveform fitting signal subjected to digital-to-analog conversion into a first waveform fitting signal, a second waveform fitting signal and a third waveform fitting signal;
inputting the first waveform fitting signal to a first alternating current power amplification unit for signal amplification processing to obtain a first amplified signal;
inputting the second waveform fitting signal to a second alternating current power amplification unit for signal amplification processing to obtain a second amplified signal;
and inputting the third waveform fitting signal to a third alternating current power amplification unit for signal amplification processing to obtain a third amplified signal.
The amplified signal after signal amplification is input to a rectification module, and the rectification module performs rectification processing on the amplified signal, including:
inputting the first amplified signal to a first rectifying unit for rectifying to obtain a first rectified signal;
inputting the second amplified signal to a second rectifying unit for rectifying to obtain a second rectified signal;
and inputting the third amplified signal to a third rectifying unit for rectifying to obtain a third rectified signal.
In another specific embodiment, the initial phase of the trapezoidal wave of the first amplified signal is 0, and the waveform of the first amplified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, ia (T) is a first amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
The initial phase of the trapezoidal wave of the second amplified signal is
The waveform of the second amplified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, ib (T) is a second amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
The initial phase of the trapezoidal wave of the third amplified signal is
The waveform of the third amplified signal in one period is calculated by the following formula:
where T is a period, T is 20mS, T is any time within the period T, ic (T) is a third amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
The waveform of the first rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, idca (T) is a first rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
The waveform of the second rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, idcb (T) is a second rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
The waveform of the third rectified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, Idcc (T) is a third rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
In one embodiment, as shown in FIG. 6, the period of the first rectified signal value Idca (T), the second rectified signal value Idcb (T), and the third rectified signal value Idcc (T) is T/2 after being sorted. The first amplified signal value ia (t), the second amplified signal value ib (t), and the third amplified signal value ic (t) have a frequency of 50Hz and a period of 20ms (milliseconds), and now the frequency changes from 2 × 50Hz to 100Hz and the period of 10ms (milliseconds); the original positive and negative waveforms can be seen from the waveform diagram, all become positive waveforms,
so as to analyze
The composite waveform Idc is repeated at the period of T/2 later:
in that
Section (2):
Idca(t)＝kt；
Idcb(t)＝Im-kt；
Idcc(t)＝Im；
Idc＝(kt+Im-kt+Im)＝2Im；
wherein Idca (t) is a first rectified signal value at any time t, Idcb (t) is a second rectified signal value at any time t, Idcc (t) is a third rectified signal value at any time t, Idc is a composite waveform, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
In that
Section (2):
Idca(t)＝Im；
wherein Idca (t) is a first rectified signal value at any time t, Idcb (t) is a second rectified signal value at any time t, Idcc (t) is a third rectified signal value at any time t, Idc is a composite waveform, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
In that
Section (2):
Idcb(t)＝Im；
wherein Idca (t) is a first rectified signal value at any time t, Idcb (t) is a second rectified signal value at any time t, and Idcc (t) is a third rectified signal value at any time tA rectified signal value, Idc is a synthesized waveform, k is a coefficient, and
im is the amplitude of the ac current output.
Therefore, after rectification, the output value of the three-phase current combination is constant to 2Im, and accurate conversion from alternating current to direct current is realized.
Claims (15)
1. A direct current source implemented on an additive principle, comprising:
the three-phase alternating current power module and the rectification module; the three-phase alternating current power module is electrically connected with the rectification module;
wherein the three-phase alternating current power module comprises: the device comprises a signal input unit, a signal processing unit, a waveform fitting unit and an alternating current power amplifier unit; the signal input unit is electrically connected with the signal processing unit, the signal processing unit is electrically connected with the waveform fitting unit, the waveform fitting unit is electrically connected with the alternating current power amplifier unit, and the alternating current power amplifier unit is electrically connected with the rectifying module.
2. The additive-based dc current source of claim 1, wherein said ac power amplification unit comprises: the power amplifier comprises a first alternating current power amplifier unit, a second alternating current power amplifier unit and a third alternating current power amplifier unit; the rectification module includes: the first rectifying unit, the second rectifying unit and the third rectifying unit;
the input end of the first alternating current power amplifier unit, the input end of the second alternating current power amplifier unit and the input end of the third alternating current power amplifier unit are respectively and electrically connected with the waveform fitting unit;
the output end of the first alternating current power amplification unit is electrically connected with the input end of the first rectification unit, the output end of the second alternating current power amplification unit is electrically connected with the input end of the second rectification unit, and the output end of the third alternating current power amplification unit is electrically connected with the input end of the third rectification unit;
the output end of the first rectifying unit, the output end of the second rectifying unit and the output end of the third rectifying unit are isolated from each other.
3. An additively implemented direct current source as claimed in claim 1, characterized in that the signal input unit is electrically connected to the signal processing unit, in particular:
the signal input unit is connected with the signal processing unit through 4 identical IO lines.
4. An additively implemented direct current source as claimed in claim 1, characterized in that the signal processing unit is electrically connected to the waveform fitting unit, in particular:
the signal processing unit is connected with the waveform fitting unit through a serial peripheral interface.
5. An additive-principle-implemented direct-current power supply according to any one of claims 1 to 4, wherein the signal input unit is an input keyboard, the signal processing unit is a processor, and the rectifying module is a rectifying bridge circuit with an output current of 200A and a threshold voltage of 0.8V or a unidirectional rectifying bridge circuit with an output current exceeding 200A.
6. A control method for controlling a direct current source implemented on an additive principle according to any of claims 1-5, characterized in that it comprises:
the signal input unit transmits the acquired input signal to the signal processing unit;
the signal processing unit carries out waveform fitting calculation on the input signal and inputs a fitting calculation signal subjected to the waveform fitting calculation to the waveform fitting unit;
the waveform fitting unit is used for fitting the fitting calculation signal, performing digital-to-analog conversion on the fitted signal, and inputting the waveform fitting signal subjected to digital-to-analog conversion to the AC power amplification unit;
the alternating current power amplification unit is used for amplifying the waveform fitting signal and inputting the amplified signal subjected to signal amplification to the rectification module;
the rectification module is used for rectifying the amplified signal and outputting a rectified direct current signal.
7. The method according to claim 6, wherein the inputting the waveform fitting signal subjected to digital-to-analog conversion into an ac power amplifier unit, and the ac power amplifier unit performing signal amplification processing on the waveform fitting signal, comprises:
dividing the waveform fitting signal subjected to digital-to-analog conversion into a first waveform fitting signal, a second waveform fitting signal and a third waveform fitting signal;
inputting the first waveform fitting signal to a first alternating current power amplification unit for signal amplification processing to obtain a first amplified signal;
inputting the second waveform fitting signal to a second alternating current power amplification unit for signal amplification processing to obtain a second amplified signal;
and inputting the third waveform fitting signal to a third alternating current power amplification unit for signal amplification processing to obtain a third amplified signal.
8. The method of claim 7, wherein the step of inputting the amplified signal to a rectifying module, and the rectifying module rectifies the amplified signal comprises:
inputting the first amplified signal to a first rectifying unit for rectifying to obtain a first rectified signal;
inputting the second amplified signal to a second rectifying unit for rectifying to obtain a second rectified signal;
and inputting the third amplified signal to a third rectifying unit for rectifying to obtain a third rectified signal.
9. The method of claim 8 wherein said first rectified signal, said second rectified signal, and said third rectified signal are isolated from one another.
10. The method of claim 8, wherein the initial phase of the trapezoidal wave of the first amplified signal is 0, and the waveform of the first amplified signal in one period is calculated by the following equation:
wherein T is a period, T is 20mS, T is any time within the period T, ia (T) is a first amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
11. The method of claim 8, wherein the trapezoidal wave of the second amplified signal has an initial phase of
The waveform of the second amplified signal in one period is calculated by the following formula:
wherein T is a period, T is 20mS, T is any time within the period T, ib (T) is a second amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
12. The method of claim 8, wherein the trapezoidal wave of the third amplified signal has an initial phase of
The waveform of the third amplified signal in one period is calculated by the following formula:
where T is a period, T is 20mS, T is any time within the period T, ic (T) is a third amplified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
13. The method of claim 8, wherein the waveform of the first rectified signal during a period is calculated by the following equation:
wherein T is a period, T is 20mS, T is any time within the period T, idca (T) is a first rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
14. The method of claim 8, wherein the waveform of the second rectified signal during a period is calculated by the following equation:
wherein T is a period, T is 20mS, T is any time within the period T, idcb (T) is a second rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
15. The method of claim 8, wherein the waveform of the third rectified signal in one period is calculated by the following equation:
wherein T is a period, T is 20mS, T is any time within the period T, Idcc (T) is a third rectified signal value at any time T, k is a coefficient, and satisfies
Im is the amplitude of the ac current output.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497118A (en) * | 2011-12-29 | 2012-06-13 | 杭州四达电炉成套设备有限公司 | Passive isolation sampling circuit for output direct current of three-phase rectifier bridge |
| CN202994897U (en) * | 2012-10-30 | 2013-06-12 | 清华大学 | Digital medium-high frequency lead wire current detection module |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| US20140184176A1 (en) * | 2012-12-26 | 2014-07-03 | Guan-Xiong Huang | Power transmitting apparatus for digitally controlling voltage and current of alternating current signal |
| CN205546082U (en) * | 2016-03-25 | 2016-08-31 | 中山市富阳电子科技有限公司 | Simple and practical's LED DC power supply |
| CN107437899A (en) * | 2017-09-13 | 2017-12-05 | 上海交通大学 | The sinusoidal single-phase AC DC translation circuits of net stream |
| CN111722008A (en) * | 2020-06-29 | 2020-09-29 | 国网山东省电力公司电力科学研究院 | Three-phase alternating-current charging pile testing method, device and equipment based on analog multiplier principle |
-
2021
- 2021-06-28 CN CN202110720366.6A patent/CN113359925B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497118A (en) * | 2011-12-29 | 2012-06-13 | 杭州四达电炉成套设备有限公司 | Passive isolation sampling circuit for output direct current of three-phase rectifier bridge |
| CN202994897U (en) * | 2012-10-30 | 2013-06-12 | 清华大学 | Digital medium-high frequency lead wire current detection module |
| US20140184176A1 (en) * | 2012-12-26 | 2014-07-03 | Guan-Xiong Huang | Power transmitting apparatus for digitally controlling voltage and current of alternating current signal |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| CN205546082U (en) * | 2016-03-25 | 2016-08-31 | 中山市富阳电子科技有限公司 | Simple and practical's LED DC power supply |
| CN107437899A (en) * | 2017-09-13 | 2017-12-05 | 上海交通大学 | The sinusoidal single-phase AC DC translation circuits of net stream |
| CN111722008A (en) * | 2020-06-29 | 2020-09-29 | 国网山东省电力公司电力科学研究院 | Three-phase alternating-current charging pile testing method, device and equipment based on analog multiplier principle |
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