CN116827385B - Power information fusion device for DC-DC converter power control loop disturbance - Google Patents
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Abstract
The invention provides a power information fusion device for power control loop disturbance of a DC-DC converter, which comprises a direct current voltage source, a band-pass filter, a driving circuit, a modulation module and N source Boost converters as power sources. Compared with the prior communication mode, the transmitting converter does not need a baseband signal generating circuit and a coupling circuit, the receiving converter only needs a simple sampling and filtering circuit, and the control chip MCU completes signal demodulation, so that hardware cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of power electronic networking, in particular to a power information fusion device for power control loop disturbance of a DC-DC converter.
Background
In the context of a dual-carbon strategic goal, power electronics devices, which are one of the core hubs for building energy internet, have put higher demands on their own digitization and intelligence. Research into power electronics often focuses on power conversion, while less attention is paid to communication technology between devices. With the urgent need for information exchange by power electronics, students are continually fusing power electronics technology with information technology, and power/data deep integration of power electronics is expected to become a new trend.
The communication technology applied between power electronic devices at present mainly comprises wireless communication, control local area network bus communication and power line carrier communication. The wireless communication cost is low, the wireless communication is easy to be interfered by the outside, is not suitable for long-distance transmission, is easy to be invaded, and has low safety; the control local area network bus has high communication rate, requires additional communication cables and has low cost performance; the power line carrier communication relies on the power line to carry out data transmission, and the reliability is high, but the cost is low, an additional hardware circuit is needed to generate a baseband signal, and then the signal is coupled to the power line through an impedance matching circuit.
The above communication techniques cannot achieve a good balance in terms of noise immunity, real-time performance, cost, and the like. Therefore, by combining the characteristics of the power electronic equipment, a new communication method is explored to be a research direction of a learner, the power electronic technology is used as a branch of the electronic technology, the controllable conversion of the electric energy is realized, the electric energy before and after the conversion exists in an analog quantity mode, but a discretization state exists in the process of digitally controlling the power electronic equipment, and the method provides possibility for the integration of modern digital communication technology.
Disclosure of Invention
The invention aims to solve the problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a power information fusion device for DC-DC converter power control loop disturbance, comprising: the direct-current voltage source, the band-pass filter, the driving circuit, the modulation module, the source Boost converter as a power supply, the load Buck converter as a load and the direct-current bus; the output end of the Boost converter and the input end of the Buck converter share a direct current bus, the source Boost converter and the load Buck converter are connected through the direct current bus, the driving circuit is connected with the grid electrodes of a switching tube of the source Boost converter and a switching tube of the load Buck converter, and the band-pass filter is connected with the direct current bus;
when the modulation module does not send data, a communication switch of the modulation module is disconnected, traditional power conversion is carried out, the power modulation quantity vm (t) is directly compared with a triangular carrier wave vc (t) to generate a pulse width modulation (Pulse Width Modulation, PWM) signal, the duty ratio is delta (t), and the on and off of a source Boost converter switching tube and a load Buck converter switching tube are controlled;
the modulation module sends data, the communication switch is conducted, the source Boost converter modulates a baseband signal vs (t) to be transmitted into a high-frequency signal vd (t) through MSK of the modulation module, the high-frequency signal vd (t) is superimposed on the original power modulation quantity vm (t), a composite power/data modulation quantity ve (t) is generated, and the composite power/data modulation quantity ve (t) is compared with a triangular carrier wave vc (t) to generate a PWM signal.
As a preferred embodiment, the source Boost converter comprises: a first direct current voltage source E1, a first inductor L1, a first capacitor C1, a first switching tube Q1 and a second switching tube Q2, wherein the positive electrode of the first direct current voltage source E1 is connected with one end of the first inductor L1, the negative electrode of the first direct current voltage source E1 is connected with the source electrode of the first switching tube Q1, and the first inductorL 1 The other end of (2) is connected with the first switch tubeQ 1 Drain electrode and second switch tubeQ 2 The source electrode is connected; the first capacitorC 1 One end of the first capacitor is connected with the positive electrode of the direct current busC 1 The other end of the capacitor is connected with the negative electrode of the direct current bus; the first switch tubeQ 1 Drain electrode and first inductorL 1 Is connected with the first switch tubeQ 1 The grid electrode of the first switch tube is connected with the driving circuitQ 1 The source electrode of the (C) is connected with the cathode of the direct current bus; the second switch tubeQ 2 Drain electrode and first capacitorC 1 Is connected with the second switch tubeQ 2 The grid electrode is connected with the driving circuit, and the second switch tubeQ 2 Source and first inductorL 1 Are all matched with the first switch tubeQ 1 The drain electrode is connected.
As a preferred embodiment, the band-pass filter includes: first resistorR 1 A second resistorR 2 Third resistorR 3 Fourth resistorR 4 Fifth resistorR 5 First capacitorC 5 Second capacitorC 6 Third capacitorC 7 And an operational amplifier, the first resistorR 1 One end of (a) is connected with the first capacitorC 5 The first resistorR 1 And the other end of (2) is connected with a second capacitorC 6 Third capacitorC 7 Is connected with a fourth resistorR 4 The method comprises the steps of carrying out a first treatment on the surface of the The second resistorR 2 One end and the third resistorR 3 An inverting input terminal connected to the operational amplifier, the second resistorR 2 The other end is grounded; the third resistorR 3 One end and the fourth resistorR 4 The third resistor is connected with the output end of the operational amplifierR 3 The other end is connected with a second resistorR 2 The inverting input end of the operational amplifier is connected; the fourth resistorR 4 One end is connected with a third resistorR 3 And an operational amplifier output, the fourth resistorR 4 The other end is connected with the first resistorR 1 Second capacitorC 6 Is connected with a third capacitorC 7 The method comprises the steps of carrying out a first treatment on the surface of the The fifth resistorR 5 One end connected with the third capacitorC 7 And an operational amplifier non-inverting input terminal, the fifth resistorR 5 The other end is grounded; first capacitorC 5 One end of the first capacitor is connected with the positive electrode of the DC bus voltageC 5 The other end is connected with the first resistorR 1 The first capacitorC 5 Performing direct current blocking treatment on the direct current bus voltage to obtain an alternating current component of the direct current bus voltage; the second capacitorC 6 A first resistor connected toR 1 Fourth resistorR 4 And a third capacitorC 7 The second step ofCapacitor with a capacitor bodyC 6 The other end is grounded; the third capacitorC 7 A first resistor connected toR 1 Fourth resistorR 4 And a second capacitorC 6 The third capacitorC 7 The other end is connected with a fifth resistorR 5 And the non-inverting input end of the operational amplifier; the positive power supply of the operational amplifier is connected with positive direct current voltage, the negative power supply of the operational amplifier is connected with negative direct current voltage, and the non-inverting input of the operational amplifier is connected with a fifth resistorR 5 And a third capacitorC 7 The inverting input of the operational amplifier is connected with the second resistorR 2 And a third resistorR3The output end of the operational amplifier is connected with a third resistorR 3 Fourth resistorR 4 And an MCU.
As a preferred embodiment, the load Buck converter includes: third inductorL 3 Third capacitorC 3 Fifth switch tubeQ 5 And a sixth switching tubeQ 6 The third inductorL 3 One end and a third capacitorC 3 Connection of the third inductorL 3 Another end and a fifth switch tubeQ 5 Source and sixth switching tubeQ 6 Drain electrode connection, the third capacitorC 3 One end and a third inductorL 3 A third capacitor connected toC 3 The other end is connected with the negative electrode of the direct current bus and a sixth switching tubeQ 6 The source electrode is connected; the fifth switch tubeQ 5 The drain electrode is connected with the positive electrode of the direct current bus, and the fifth switch tubeQ 5 The grid electrode is connected with the driving circuit, and the fifth switch tubeQ 5 Source and third inductorL 3 And a sixth switching tubeQ 6 The drain electrode is connected; the sixth switching tubeQ 6 Drain and third inductorL 3 And a fifth switching tubeQ 5 Source electrode is connected with the sixth switching tubeQ 6 The grid electrode is connected with the driving circuit, and the sixth switching tubeQ 6 Source electrode, negative electrode of direct current bus and third capacitorC 3 And (5) connection.
As a preferred embodiment, the first switching tubeQ 1 And a second switching tubeQ 2 The driving signals are complementary, the fifth switch tubeQ 5 And a sixth switching tubeQ 6 The drive signals are complementary.
Compared with the prior art, the invention has the advantages and positive effects that,
1. the invention utilizes the power electronic converter to transmit data when power conversion is carried out, embeds digital communication at the same time of power conversion, superimposes the minimum frequency shift keying modulation carrier wave on the power modulation quantity in the original power control loop as disturbance signal, compares the composite modulation quantity of power/data with a triangular carrier wave to generate the duty ratio integrating data information, and finally demodulates the DC bus voltage to realize communication between the power electronic converters. Compared with the prior communication mode, the transmitting converter does not need a baseband signal generating circuit and a coupling circuit, the receiving converter only needs a simple sampling and filtering circuit, and the control chip MCU completes signal demodulation, so that hardware cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a source Boost, load Buck circuit diagram of a DC-DC converter power control loop disturbance of the present invention;
FIG. 2 is a diagram of a bandpass filter circuit;
FIG. 3 is a block diagram of a modulation module based on power control loop disturbance;
fig. 4 is a block diagram of data demodulation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-4, the present invention provides a technical solution: a power information fusion device for DC-DC converter power control loop disturbance, comprising: the direct-current voltage source, the band-pass filter, the driving circuit, the modulation module, the source Boost converter as a power supply, the load Buck converter as a load and the direct-current bus; the output end of the Boost converter and the input end of the Buck converter share a direct current bus, the source Boost converter and the load Buck converter are connected through the direct current bus, the driving circuit is connected with the grid electrodes of a switching tube of the source Boost converter and a switching tube of the load Buck converter, and the band-pass filter is connected with the direct current bus;
when the modulation module does not send data, a communication switch of the modulation module is disconnected, traditional power conversion is carried out, the power modulation quantity vm (t) is directly compared with a triangular carrier wave vc (t) to generate a pulse width modulation (Pulse Width Modulation, PWM) signal, the duty ratio is delta (t), and the on and off of a source Boost converter switching tube and a load Buck converter switching tube are controlled;
the modulation module sends data, the communication switch is conducted, the source Boost converter modulates a baseband signal vs (t) to be transmitted into a high-frequency signal vd (t) through MSK of the modulation module, the high-frequency signal vd (t) is superimposed on the original power modulation quantity vm (t), a composite power/data modulation quantity ve (t) is generated, the composite power/data modulation quantity ve (t) is compared with a triangular carrier wave vc (t) to generate PWM signals, the sending converter is any one of the source Boost converter and the load Buck converter, the switching tubes are all fully-controlled switching devices, such as MOSFET, IGBT, siC, gaN, the switching tubes can be used as the switching tubes, the MOSFETs are adopted in the figure 1 in the specification, and the specific model is BSC070N10NS of Ying and flying ice company.
As shown in fig. 1-4, the source Boost converter boosts the dc voltage source to power the back-end load Buck converter, itselfAlso acts as a data transceiver, simultaneously performing power conversion and information interaction, the source Boost converter comprising: first direct current voltage sourceE 1 First inductorL 1 First capacitorC 1 First switch tubeQ 1 And a second switching tubeQ 2 The first direct current voltage sourceE 1 Positive electrode and first inductorL 1 Is connected with one end of the first direct current voltage sourceE 1 Negative electrode and first switch tubeQ 1 Source electrode connection, the first inductorL 1 The other end of (2) is connected with the first switch tubeQ 1 Drain electrode and second switch tubeQ 2 The source electrode is connected; the first capacitorC 1 One end of the first capacitor is connected with the positive electrode of the direct current busC 1 The other end of the capacitor is connected with the negative electrode of the direct current bus; the first switch tubeQ 1 Drain electrode and first inductorL 1 Is connected with the first switch tubeQ 1 The grid electrode of the first switch tube is connected with the driving circuitQ 1 The source electrode of the (C) is connected with the cathode of the direct current bus; the second switch tubeQ 2 Drain electrode and first capacitorC 1 Is connected with the second switch tubeQ 2 The grid electrode is connected with the driving circuit, and the second switch tube Q 2 The source electrode and the first inductor L1 are connected with the drain electrode of the first switch tube Q1, and dead time is inserted, wherein the first direct current voltage source E 1 First inductor L 1 First capacitor C 1 First switch tube Q 1 And a second switching tube Q 2 Equivalent to the first direct voltage source E in Boost converter #2 of FIG. 1 2 First inductor L 2 First capacitor C 2 A first switching tube Q3 and a second switching tube Q4.
As shown in fig. 1-4, the load Buck converter reduces the voltage of the dc bus to supply the load at the output endThe power, itself also acts as a data transceiver, the load Buck converter includes: third inductorL 3 Third capacitorC 3 Fifth switch tubeQ 5 And a sixth switching tubeQ 6 The third inductorL 3 One end and a third capacitorC 3 Connection of the third inductorL 3 Another end and a fifth switch tubeQ 5 Source and sixth switching tubeQ 6 Drain electrode connection, the third capacitorC 3 One end and a third inductorL 3 A third capacitor connected toC 3 The other end is connected with the negative electrode of the direct current bus and a sixth switching tubeQ 6 The source electrode is connected; the fifth switch tubeQ 5 The drain electrode is connected with the positive electrode of the direct current bus, and the fifth switch tubeQ 5 The grid electrode is connected with the driving circuit, and the fifth switch tubeQ 5 Source and third inductorL 3 And a sixth switching tube Q 6 The drain electrode is connected; the sixth switching tubeQ 6 Drain and third inductorL 3 The grid electrode of the sixth switching tube Q6 is connected with a driving circuit, the source electrode of the sixth switching tube Q6 is connected with the negative electrode of the direct current bus and the third capacitor C3, dead time is inserted, and for power conversion, the voltage of the direct current bus is reduced to supply power to the load at the output end of the direct current bus; for communication, itself also serves as a data transceiver, and the third inductor L3, the third capacitor C3, the fifth switching tube Q5, and the sixth switching tube Q6 are equivalent to the third inductor L4, the third capacitor C4, the fifth switching tube Q7, and the sixth switching tube Q8.
As shown in fig. 1 to 4, the band-pass filter is of a second order butterworth type and is implemented by a mullen-key circuit, and the band-pass filter includes: first resistorR 1 A second resistorR 2 Third resistorR 3 Fourth resistorR 4 Fifth resistorR 5 First capacitorC 5 Second capacitorC 6 Third capacitorC 7 And an operational amplifier, the first resistorR 1 One end of (a) is connected with the first capacitorC 5 The first resistorR 1 And the other end of (2) is connected with a second capacitorC 6 Third capacitorC 7 Is connected with a fourth resistorR 4 The method comprises the steps of carrying out a first treatment on the surface of the The second resistorR 2 One end and the third resistorR 3 An inverting input terminal connected to the operational amplifier, the second resistorR 2 The other end is grounded; the third resistorR 3 One end and the fourth resistorR 4 The third resistor is connected with the output end of the operational amplifierR 3 The other end is connected with a second resistorR 2 The inverting input end of the operational amplifier is connected; the fourth resistorR 4 One end is connected with a third resistorR 3 And an operational amplifier output, the fourth resistorR 4 The other end is connected with the first resistorR 1 Second capacitorC 6 Is connected with a third capacitorC 7 The method comprises the steps of carrying out a first treatment on the surface of the The fifth resistorR 5 One end connected with the third capacitorC 7 And an operational amplifier non-inverting input terminal, the fifth resistorR 5 The other end is grounded; first capacitorC 5 One end of the first capacitor is connected with the positive electrode of the DC bus voltageC 5 The other end is connected with the first resistorR 1 The first capacitorC 5 Performing direct current blocking treatment on the direct current bus voltage to obtain an alternating current component of the direct current bus voltage; the second capacitorC 6 A first resistor connected toR 1 Fourth resistorR 4 And a third capacitorC 7 The second capacitorC 6 The other end is grounded; the third capacitorC 7 A first resistor connected toR 1 Fourth resistorR 4 And a second capacitorC 6 The third capacitorC 7 The other end is connected with a fifth resistorR 5 And the non-inverting input end of the operational amplifier; the positive power supply of the operational amplifier is connected with positive direct current voltage, the negative power supply of the operational amplifier is connected with negative direct current voltage, and the non-inverting input of the operational amplifier is connected with a fifth resistorR 5 And a third capacitorC 7 The inverting input of the operational amplifier is connected with the second resistorR 2 And a third resistorR 3 The output end of the operational amplifier is connected with a third resistorR 3 Fourth resistorR 4 And MCU, MCU can finish the power conversion, data modulation and demodulation algorithm, here not to refer to a microcontroller of a specific model specifically, in this implementation mode, the operational amplifier chooses RS8752XM of the rubble science and technology, adopt the dual power supply mode, the band-pass filter gain is chosen as 4, MCU superimposes the minimum frequency shift key signal as disturbance on the power modulation quantity of the original power control loop, make the frequency of the voltage ripple of the direct-flow bus contain the characteristic of the data information; for power conversion, the duty cycle is guaranteed to be unchanged in a unit period; for communication, the minimum frequency shift keying modulated data carrier is guaranteed to be strictly orthogonal in one symbol period; in this implementation, the MCU selects STM32F407 from ST company, with a dominant frequency of 168MHz.
As shown in fig. 1-4, the first switching tubeQ 1 And a second switching tubeQ 2 The driving signals are complementary, and the driving signals of the fifth switching tube and the sixth switching tube are complementary, in the embodiment, the driving chip selects SI8233BD-D-ISR of core science and technology, and the driving chip has an isolation function.
As shown in fig. 3, when the modulation module does not transmit data, the communication switch of the modulation module is turned off to perform conventional power conversion, the power modulation amount vmt is directly compared with the triangular carrier vct to generate a PWM signal, the duty ratio is δt, and the on and off of the switching tube are controlled; the modulation module sends data, the communication switch is conducted, the base band signal vst to be transmitted is modulated into a high-frequency signal vdt through MSK, the high-frequency signal vdt is superimposed on the original power modulation vmt by the sending converter, the composite power/data modulation vet is generated, the composite power/data modulation vet is compared with the triangular carrier vct to generate PWM signals, in the implementation mode, f1=20 kHz, f0=18 kHz is selected, the frequency of the output voltage ripple carries data information, the method is double-carrier modulation, in the method, triangular carrier is adopted for power conversion, sinusoidal carrier is adopted for data modulation, the minimum frequency shift keying modulation mode is applied to the power/information fusion technology, the frequency band utilization rate can be improved, the power carrier signal is not changed by changing the power modulation quantity, the power conversion and the data transmission adopt different carriers, the data modulation is combined on the basis of the traditional PWM, the information and the intellectualization of the power electronic equipment are greatly improved by superposing the data carrier on the power loop, the data modulation mode is flexible, the anti-interference performance is strong, the power conversion and the communication interference and the communication distance are far, the prior art is the FSK is one or more frequency shift keying technology. In FSK, different digital bits (0 or 1) are represented by different frequencies. For example, 0 may be represented as a low frequency signal and 1 may be represented as a high frequency signal. The frequency switching of the FSK signal is abrupt, the signal has a distinct transition between different frequencies, the main difference compared to the MSK modulation is that the FSK signal hops between frequencies, whereas the MSK signal has a smooth frequency variation during each bit, and due to the hopping nature of the FSK signal, its frequency spectrum usually has a plurality of discrete frequency components, whereas the frequency spectrum of the MSK signal is relatively narrow, comprising only one main frequency component, and due to the difference in frequency spectrum, the MSK signal usually has a higher bandwidth efficiency, can transmit more data in the same bandwidth range, and due to the smooth frequency variation, the MSK signal has a better interference immunity in some interference environments with respect to the FSK signal, whereas the MSK is a special type of Continuous Phase Modulation (CPM), which has only one fixed frequency variation during each bit. The frequency variation of the MSK signal is smooth and the signal has no transitions between different frequencies.
As shown in fig. 4, the voltage spectrum on the dc bus is mainly concentrated at dc components, f1=20 kHz and f0=18 kHz; the band-pass filters BPF1 and BPF0 respectively filter the voltage after blocking to obtain voltage ripples only comprising f1=20 kHz or f0=18 kHz as a main component, and then respectively perform sliding discrete fourier transform SDFT to obtain the amplitudes of f1=20 kHz and f0=18 kHz frequency points, and compare with a threshold set by a program to finally judge symbols "1" and "0", thereby realizing signal demodulation.
The power information fusion method of the power information fusion device for the DC-DC converter power control loop disturbance is specifically as follows:
s1, a source Boost converter increases a direct-current voltage source to supply power for a back-stage load Buck converter, the source Boost converter also serves as a data transceiver, meanwhile, power conversion and information interaction are completed, and dead time is inserted.
S2, the load Buck converter reduces the voltage of the direct current bus to supply power to the load at the output end of the load Buck converter, the load Buck converter also serves as a data transceiver, and dead time is inserted.
S3, the source Boost converter and the load Buck converter comprise a sampling circuit, a band-pass filter, a control circuit and a driving circuit.
S4, sampling the output voltage by a sampling circuit; the band-pass filter isolates the direct current component on the direct current bus voltage, carries out band-pass filtering treatment on the alternating current component of the direct current component, and filters noise except carrier frequency; the control circuit carries out operation in a digital quantity mode, for modulation, low-frequency baseband data are modulated on a high-frequency carrier wave, then the high-frequency carrier wave is used as a disturbance signal to be superimposed on the power modulation quantity of the original power control loop, and finally the composite modulation quantity of power/data is used as a comparison value of a counter to generate the duty ratio integrating data information; for demodulation, sampling and judging the voltage ripple processed by the band-pass filter, and power amplifying the PWM signal integrated with the data information by a driving circuitDriving the first switch tubeQ 1 And a second switching tubeQ 2 Complementary on and off, a driving chip with isolation is adopted.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (1)
- A power information fusion device for DC-DC converter power control loop disturbance, comprising: the direct-current voltage source, the band-pass filter, the driving circuit, the modulation module, the source Boost converter as a power supply, the load Buck converter as a load and the direct-current bus; the output end of the source Boost converter and the input end of the load Buck converter share a direct current bus, the source Boost converter and the load Buck converter are connected through the direct current bus, the driving circuit is connected with the grid electrodes of a switching tube of the source Boost converter and a switching tube of the load Buck converter, and the band-pass filter is connected with the direct current bus;when the modulation module does not send data, a communication switch of the modulation module is disconnected, traditional power conversion is carried out, the power modulation quantity vm (t) is directly compared with a triangular carrier wave vc (t) to generate a pulse width modulation (Pulse Width Modulation, PWM) signal, the duty ratio is delta (t), and the on and off of a source Boost converter switching tube and a load Buck converter switching tube are controlled;the modulation module sends data, the communication switch is conducted, the source Boost converter modulates a baseband signal vs (t) to be transmitted into a high-frequency signal vd (t) through MSK of the modulation module, the high-frequency signal vd (t) is superimposed on the original power modulation quantity vm (t), a composite power/data modulation quantity ve (t) is generated, and the composite power/data modulation quantity ve (t) is compared with a triangular carrier wave vc (t) to generate a PWM signal;the source Boost converter increases a direct-current voltage source to supply power for the back-stage load Buck converter;the source Boost converter includes: the direct-current power supply comprises a first direct-current voltage source E1, a first inductor L1, a first capacitor C1, a first switching tube Q1 and a second switching tube Q2, wherein the positive electrode of the first direct-current voltage source E1 is connected with one end of the first inductor L1, the negative electrode of the first direct-current voltage source E1 is connected with the source electrode of the first switching tube Q1, and the other end of the first inductor L1 is connected with the drain electrode of the first switching tube Q1 and the source electrode of the second switching tube Q2; one end of the first capacitor C1 is connected with the positive electrode of the direct current bus, and the other end of the first capacitor C1 is connected with the negative electrode of the direct current bus; the drain electrode of the first switching tube Q1 is connected with the first inductor L1, the grid electrode of the first switching tube Q1 is connected with the driving circuit, and the source electrode of the first switching tube Q1 is connected with the negative electrode of the direct current bus; the drain electrode of the second switching tube Q2 is connected with the first capacitor C1, the grid electrode of the second switching tube Q2 is connected with the driving circuit, and the source electrode of the second switching tube Q2 and the first inductor L1 are both connected with the drain electrode of the first switching tube Q1;the band-pass filter includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C5, a second capacitor C6, a third capacitor C7 and an operational amplifier, wherein one end of the first resistor R1 is connected with the first capacitor C5, and the other end of the first resistor R1 is connected with the second capacitor C6 and the third capacitor C7 and the fourth resistor R4; one end of the second resistor R2 is connected with the inverting input end of the operational amplifier with the third resistor R3, and the other end of the second resistor R2 is grounded; one end of the third resistor R3 is connected with the output end of the operational amplifier through the fourth resistor R4, and the other end of the third resistor R3 is connected with the inverting input end of the operational amplifier through the second resistor R2; one end of the fourth resistor R4 is connected with the third resistor R3 and the output end of the operational amplifier, and the other end of the fourth resistor R4 is connected with the first resistor R1 and the second capacitor C6 and the third capacitor C7; one end of the fifth resistor R5 is connected with the third capacitor C7 and the non-inverting input end of the operational amplifier, and the other end of the fifth resistor R5 is grounded; one end of a first capacitor C5 is connected with the positive electrode of the direct current bus voltage, the other end of the first capacitor C5 is connected with a first resistor R1, and the first capacitor C5 performs direct current blocking treatment on the direct current bus voltage to obtain an alternating current component of the direct current bus voltage; one end of the second capacitor C6 is connected with the first resistor R1, the fourth resistor R4 and the third capacitor C7, and the other end of the second capacitor C6 is grounded; one end of the third capacitor C7 is connected with the first resistor R1, the fourth resistor R4 and the second capacitor C6, and the other end of the third capacitor C7 is connected with the fifth resistor R5 and the non-inverting input end of the operational amplifier; the positive power supply end of the operational amplifier is connected with positive direct current voltage, the negative power supply end of the operational amplifier is connected with negative direct current voltage, the non-inverting input end of the operational amplifier is connected with a fifth resistor R5 and a third capacitor C7, the inverting input end of the operational amplifier is connected with a second resistor R2 and a third resistor R3, and the output end of the operational amplifier is connected with the third resistor R3, a fourth resistor R4 and an MCU;the load Buck converter comprises: the three-phase direct-current power supply comprises a third inductor L3, a third capacitor C3, a fifth switching tube Q5 and a sixth switching tube Q6, wherein one end of the third inductor L3 is connected with the third capacitor C3, the other end of the third inductor L3 is connected with a source electrode of the fifth switching tube Q5 and a drain electrode of the sixth switching tube Q6, one end of the third capacitor C3 is connected with the third inductor L3, and the other end of the third capacitor C3 is connected with a negative electrode of a direct-current bus and a source electrode of the sixth switching tube Q6; the drain electrode of the fifth switching tube Q5 is connected with the positive electrode of the direct current bus, the grid electrode of the fifth switching tube Q5 is connected with the driving circuit, and the source electrode of the fifth switching tube Q5 is connected with the drain electrodes of the third inductor L3 and the sixth switching tube Q6; the drain electrode of the sixth switching tube Q6 is connected with the source electrodes of the third inductor L3 and the fifth switching tube Q5, the grid electrode of the sixth switching tube Q6 is connected with the driving circuit, and the source electrode of the sixth switching tube Q6 is connected with the negative electrode of the direct current bus and the third capacitor C3;the driving signals of the first switching tube Q1 and the second switching tube Q2 are complementary, and the driving signals of the fifth switching tube Q5 and the sixth switching tube Q6 are complementary.
Priority Applications (1)
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| US4449174A (en) * | 1982-11-30 | 1984-05-15 | Bell Telephone Laboratories, Incorporated | High frequency DC-to-DC converter |
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| CN102624427A (en) * | 2012-03-05 | 2012-08-01 | 浙江大学 | Synchronous transmission system of energy and information |
| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| WO2014079129A1 (en) * | 2012-11-21 | 2014-05-30 | 东南大学 | Fast transient response dc-dc switching converter with high load regulation rate |
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| CN114785136A (en) * | 2022-04-12 | 2022-07-22 | 湖南大学 | Digital power communication auxiliary power supply and ripple wave suppression method thereof |
| CN114825656A (en) * | 2022-04-06 | 2022-07-29 | 浙江大学 | Wireless power and data synchronous transmission system and data modulation method |
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| US4449174A (en) * | 1982-11-30 | 1984-05-15 | Bell Telephone Laboratories, Incorporated | High frequency DC-to-DC converter |
| CN101162868A (en) * | 2006-10-13 | 2008-04-16 | 深圳迈瑞生物医疗电子股份有限公司 | Converter with continuously adjustable output |
| CN102624427A (en) * | 2012-03-05 | 2012-08-01 | 浙江大学 | Synchronous transmission system of energy and information |
| WO2014079129A1 (en) * | 2012-11-21 | 2014-05-30 | 东南大学 | Fast transient response dc-dc switching converter with high load regulation rate |
| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN111404580A (en) * | 2020-03-24 | 2020-07-10 | 中国矿业大学 | OFDM-based DC/DC converter power line power signal composite transmission system and transmission method |
| CN114825656A (en) * | 2022-04-06 | 2022-07-29 | 浙江大学 | Wireless power and data synchronous transmission system and data modulation method |
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| CN116827385A (en) | 2023-09-29 |
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