CN108318738A - A kind of phase detecting circuit and parameter information detection method of radio energy transmission system - Google Patents
A kind of phase detecting circuit and parameter information detection method of radio energy transmission system Download PDFInfo
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- CN108318738A CN108318738A CN201810077812.4A CN201810077812A CN108318738A CN 108318738 A CN108318738 A CN 108318738A CN 201810077812 A CN201810077812 A CN 201810077812A CN 108318738 A CN108318738 A CN 108318738A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2611—Measuring inductance
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Abstract
The present invention provides a kind of phase detecting circuit of radio energy transmission system and parameter information detection methods, and wherein phase detecting circuit includes divider resistance, bi-directional zener diode, comparator, isolator and door, single pole double throw analog switch and RC filters.Voltage in lateral capacitance of radio energy transmission system is input to comparator after divider resistance is converted to small size value signal and generates square wave, what is generated by square-wave signal after isolator and controller with the PWM wave phase of phase and obtains phase detection signal with primary side fundamental voltage, the signal is switched by single pole double throw analog and RC filter circuits, and phase information is modulated on d. c. voltage signal.The d. c. voltage signal that parameter calculation procedure is obtained based on phase detecting circuit can calculate the parameters such as phase angle, impedance and the mutual inductance in electromagnetic coupling device.The present invention has many advantages, such as to be simple and efficient, is at low cost, circuit is reliable, is not easy to be disturbed.
Description
Technical field
The present invention relates to a kind of converters technical field, specifically a kind of radio energy transmission system
Phase detecting circuit and parameter information detection method.
Background technology
For the radio energy transmission system being widely used at present, the mutual inductance of coupling coil is extremely important.And to obtain coupling
The mutual inductance parameter of zygonema circle first has to the phase difference for measuring primary side voltage and current.Conventional phase measurement method generally by
Time interval divided by the period of two signals are measured to obtain phase difference：Two same frequency signals are converted into number by comparing device
Signal, using the time interval of two digital signals of counter measures, this time interval divided by period, which are multiplied by 360 °, to be obtained
To phase difference.This method is limited to the frequency of counter, and when phase difference for measuring high-frequency signal will produce large error.Therefore it is
The mutual inductance for obtaining radio energy transmission system, needs to be improved existing high-frequency signal phase detection techniques.
By the retrieval discovery to the prior art, patent of invention " high-frequency signal method for measuring phase difference " (CN
03543333A) disclose a kind of high-frequency signal Method for Phase Difference Measurement.The invention obtains high-frequency signal using frequency measurement circuit
Frequency.Circuit occurs to digital quadrature signal using microcontroller circuit to be configured, output is identical with high-frequency signal frequency
Sinusoidal signal and cosine signal respectively demodulate high-frequency signal using two-way demodulator, using 4 road synchronous acquisition circuits pair
4 road down-conversion signal synchronized samplings, sequence quantify, finally by the measurement for calculating completion high-frequency signal phase difference.
On the one hand existing phase-detection and mutual inductance evaluation method are difficult to meet the required precision of high-frequency signal, on the other hand
Detection process is cumbersome, and cost is higher.Therefore, current stage highly desirable a kind of parameter information detection of radio energy transmission system
Method is provided simultaneously with and the advantages such as is simple and efficient, is of low cost.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of phase-detections of radio energy transmission system
Circuit and parameter information detection method can be accurately calculated based on the d. c. voltage signal that phase detecting circuit obtains
The parameter values such as phase angle, impedance and mutual inductance in radio energy transmission system.
The present invention is realized according to following technical scheme：
A kind of phase detecting circuit of radio energy transmission system, which is characterized in that including：Two divider resistance R3 and
R4, bi-directional zener diode BZD, comparator CMP, isolator ISO and door AND, single pole double throw analog switch SPDT, RC are filtered
Device, it is one end of the other end and the second divider resistance R4, two-way wherein one end of the first divider resistance R3 inputs anode as circuit
One end of Zener diode BZD, an input terminal of comparator CMP are connected；The other end of second divider resistance R4 with it is two-way neat
Receive the other end of diode BZD, comparator CMP another input terminal be connected, form circuit and input cathode；Comparator CMP's
Output end is connected with the input terminal of isolator ISO, and the output end of isolator ISO is connected with an input terminal with door AND；With door
Input terminal of another input terminal of AND as pwm signal, the output end with door AND is with single pole double throw analog switch SPDT's
Input terminal is connected, and the output end of single pole double throw analog switch SPDT is connected with the input terminal of RC filters.
In above-mentioned technical proposal, the radio energy transmission system includes four capacitances C0-C3, eight power MOSFET
Q1-Q8, resistance RL, two coils L1, L2, Coil resistance R1 and R2, one end of first capacitance C0 is with power MOSFET Q1's
Drain electrode, the drain electrode of power MOSFET Q3 are connected, and form the anode of circuit input end, the other end and power of first capacitance C0
The source electrode of MOSFET Q2, the source electrode of power MOSFET Q4 are connected, and form the cathode of circuit input end；Power MOSFET Q1's
Source electrode, the drain electrode of power MOSFET Q2, one end of coil L1 are connected；The source electrode of power MOSFET Q3 is with power MOSFETQ4's
Drain electrode, one end of capacitance C1 are connected；The other end of coil L1 is connected with the other end of capacitance C1；One end of coil L2 and capacitance C2
One end be connected；The other end of coil L2 is connected with the drain electrode of the source electrode of power MOSFET Q5, power MOSFET Q6；Capacitance C2
The other end be connected with the drain electrode of the source electrode of power MOSFET Q7, power MOSFET Q8；The drain electrode of power MOSFET Q5 and work(
The drain electrode of rate MOSFET Q7, one end of capacitance C3, one end of resistance RL are connected；The source electrode and power of power MOSFET Q6
The source electrode of MOSFET Q8, the other end of capacitance C3, the other end of resistance RL are connected.
In above-mentioned technical proposal, input DC power Vin passes through the single-phase bridge being made of four power MOSFET Q1-Q4
Formula circuit is reverse into alternating current V1, and first siding ring L1 connects with capacitance C1.Second siding ring L2 connects with capacitance C2, by by
The rectification circuit of four power MOSFET Q5-Q8 compositions forms output voltage V0, acts on load RL.
In above-mentioned technical proposal, voltage in a lateral capacitance of the radio energy transmission system through divider resistance R3 and
R4, which is converted to, is input to comparator CMP after small size value signal, and the square wave of generation is by after isolator ISO and Digital Signal Processing
Device DSP control generations with the PWM wave phase of phase and obtain phase detection signal with primary side fundamental voltage, the letter of the detection signal
Breath after single pole double throw analog switch SPDT and RC filter apparatus by being modulated onto on a d. c. voltage signal.
A kind of parameter information detection method of radio energy transmission system is realized according to any of the above-described phase detecting circuit
, which is characterized in that include the following steps：
Step 1：By primary side bridge arm phase angle α, secondary side bridge arm phase angle beta, secondary side voltage current phase differenceResistance R2
Parameters initialize；
Step 2：Based on synchronous circuit and phase detecting circuit to input voltage vin, input current Iin, output voltage
V0, output current I0 and phase-modulation voltage Vphase are sampled；
Step 3：Calculate primary side voltage current phase difference θ, load impedance RL；
Step 4：Calculate equivalent resistance Re, equivalent reactance Xe；
Step 5：Estimate the extra impedance X of secondary side2With mutual inductance M, the mutual inductance estimation of radio energy transmission system is completed.
Compared with prior art, the present invention has following advantageous effect：
(1) phase detecting circuit can be effectively prevented from signal and be interfered, and reliability is high；
(2) entire scheme implementation result is good, at low cost；
(3) it is not necessarily to additional control circuit, is implemented simple and convenient.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the radio energy transmission system schematic diagram of the embodiment of the present invention.
Fig. 2 is the phase detecting circuit schematic diagram of the embodiment of the present invention.
Fig. 3 is the parameter calculation procedure flow chart of the embodiment of the present invention.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
Fig. 1 is the radio energy transmission system schematic diagram in the present embodiment.The present invention radio energy transmission system include
Four capacitances C0-C3, eight power MOSFET Q1-Q8, resistance RL, two coils L1, L2.One end of first capacitance C0 with
The drain electrode of power MOSFET Q1, the drain electrode of power MOSFET Q3 are connected, and form the anode of circuit input end.First capacitance C0
The other end be connected with the source electrode of the source electrode of power MOSFET Q2, power MOSFET Q4, form the cathode of circuit input end.Work(
The source electrode of rate MOSFET Q1, the drain electrode of power MOSFET Q2, one end of coil L1 are connected.The source electrode of power MOSFET Q3 with
The drain electrode of power MOSFET Q4, one end of capacitance C1 are connected.The other end of coil L1 is connected with the other end of capacitance C1.Coil
One end of L2 is connected with one end of capacitance C2.The other end of coil L2 and the source electrode of power MOSFET Q5, power MOSFET Q6
Drain electrode be connected.The other end of capacitance C2 is connected with the drain electrode of the source electrode of power MOSFET Q7, power MOSFET Q8.Power
The drain electrode of MOSFET Q5 is connected with one end of the drain electrode of power MOSFET Q7, one end of capacitance C3, resistance RL.Power MOSFET
The source electrode of Q6 and the source electrode of power MOSFET Q8, the other end phase of the anode of diode D8, the other end of capacitance C3, resistance RL
Even.
Input DC power Vin passes through the single-phase bridge circuit being made of four power MOSFET Q1-Q4 and is reverse into exchange
Electric V1.First siding ring L1 connects with capacitance C1.Second siding ring L2 connects with capacitance C2, by by four power MOSFET
The rectification circuit of Q5-Q8 compositions forms output voltage V0, acts on load RL.
Fig. 2 is the phase detecting circuit figure in the present embodiment.The phase detecting circuit figure include two divider resistance R3 and
R4, bi-directional zener diode BZD, comparator CMP, isolator ISO and door AND, single pole double throw analog switch SPDT, RC are filtered
Device.One end of first divider resistance R3 inputs anode, one end, the two-way Zener of the other end and the second divider resistance R4 as circuit
One end of diode BZD, an input terminal of comparator CMP are connected.The other end of second divider resistance R4 and two-way Zener two
The other end of pole pipe BZD, another input terminal of comparator CMP are connected, and form circuit and input cathode.The output of comparator CMP
End is connected with the input terminal of isolator ISO.The output end of isolator ISO and it is connected with an input terminal of door AND.With door AND
Input terminal of another input terminal as pwm signal.With the input of the output end and single pole double throw analog switch SPDT of door AND
End is connected.The input terminal of the output end RC filters of single pole double throw analog switch SPDT is connected.
The voltage on a lateral capacitance C1 in radio energy transmission system is acquired, is converted into after resistance R3, R4 partial pressure small
Comparator CMP is input to after amplitude signal, the square wave of generation after isolator ISO with digital signal processor DSP control by producing
Raw with the PWM wave phase of phase and obtains phase detection signal with primary side fundamental voltage V1, which passes through single-pole double throw
After analog switch SPDT and RC filter apparatus, phase information is modulated on d. c. voltage signal Vphase.
Fig. 3 is the parameter information detection method flow chart of the embodiment of the present invention.Parameter information detection method is examined based on phase
Phase angle in radio energy transmission system, impedance and mutually can be accurately calculated in the d. c. voltage signal that slowdown monitoring circuit obtains
The parameter values such as sense comprising following steps：
Step 1：Primary side bridge arm phase angle α, secondary side bridge arm phase angle beta, secondary side voltage current phase differenceEtc. parameters be
It is given by controller, resistance R2 is the internal resistance of coil, and value is held essentially constant, and coil can pass through after completing
LCR tables measure, therefore the above parameter is i.e. known in system initialisation phase；
Step 2：Based on synchronous circuit and phase detecting circuit to input voltage vin, input current Iin, output voltage
V0, output current I0 and phase-modulation voltage Vphase are sampled, and the above signal is direct current signal, measuring technique very at
It is ripe, it is easy to implement；
Step 3：Controller calculates primary side voltage current phase difference θ, root according to the transformational relation of phase and DC voltage
According to output voltage V0 and output current I0 computational load impedances RL；
Step 4：According to load impedance RL, secondary side bridge arm phase angle beta and secondary side voltage current phase differenceIt calculates equivalent
Resistance Re, equivalent reactance Xe；
Step 5：Estimate the extra impedance X of secondary side2With mutual inductance M, the mutual inductance estimation of radio energy transmission system is completed.
The parameter of main components is as follows in example：
Divider resistance R3, R4：10k Ω and 2M Ω；
Comparator CMP：TLV3502；
Isolator ISO：ISO7710；
With door AND：SN74LVCLG08；
Single pole double throw analog switch SPDT：NC7SB3157,250MHz；
Digital signal processor DSP：TMS320F28335.
The present invention provides a kind of phase detecting circuit and parameter information detection method of radio energy transmission system, has
Computational methods are simple and efficient, circuit cheap reliable, the advantages of being not easy to be disturbed, and have apparent application value.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (5)
1. a kind of phase detecting circuit of radio energy transmission system, which is characterized in that including：Two divider resistances R3 and R4,
Bi-directional zener diode BZD, comparator CMP, isolator ISO and door AND, single pole double throw analog switch SPDT, RC filter,
Wherein one end of the first divider resistance R3 inputs anode as circuit, one end of the other end and the second divider resistance R4, it is two-way together
Receive one end of diode BZD, comparator CMP an input terminal be connected；The other end of second divider resistance R4 and two-way Zener
The other end of diode BZD, another input terminal of comparator CMP are connected, and form circuit and input cathode；Comparator CMP's is defeated
Outlet is connected with the input terminal of isolator ISO, and the output end of isolator ISO is connected with an input terminal with door AND；With door
Input terminal of another input terminal of AND as pwm signal, the output end with door AND is with single pole double throw analog switch SPDT's
Input terminal is connected, and the output end of single pole double throw analog switch SPDT is connected with the input terminal of RC filters.
2. a kind of phase detecting circuit of radio energy transmission system according to claim 1, which is characterized in that the nothing
Line electric energy transmission system includes four capacitances C0-C3, eight power MOSFET Q1-Q8, resistance RL, two coils L1, L2, line
Internal resistance R1 and R2 are enclosed, one end of first capacitance C0 is connected with the drain electrode of power MOSFET Q1, the drain electrode of power MOSFET Q3,
Form the anode of circuit input end, the other end of first capacitance C0 and the source electrode of power MOSFET Q2, power MOSFET Q4
Source electrode be connected, form the cathode of circuit input end；The source electrode of power MOSFET Q1, the drain electrode of power MOSFET Q2, coil
One end of L1 is connected；The source electrode of power MOSFET Q3 is connected with one end of the drain electrode of power MOSFETQ4, capacitance C1；Coil L1
The other end be connected with the other end of capacitance C1；One end of coil L2 is connected with one end of capacitance C2；The other end of coil L2 with
The drain electrode of the source electrode, power MOSFET Q6 of power MOSFET Q5 is connected；The source of the other end and power MOSFET Q7 of capacitance C2
The drain electrode of pole, power MOSFET Q8 is connected；The drain electrode of power MOSFET Q5 and the drain electrode of power MOSFET Q7, capacitance C3
One end, one end of resistance RL are connected；The source electrode of the source electrode of power MOSFET Q6 and power MOSFET Q8, capacitance C3 it is another
End, the other end of resistance RL are connected.
3. a kind of phase detecting circuit of radio energy transmission system according to claim 2, which is characterized in that input is straight
Galvanic electricity source Vin passes through the single-phase bridge circuit being made of four power MOSFET Q1-Q4 and is reverse into alternating current V1, a side line
Circle L1 connects with capacitance C1.Second siding ring L2 connects with capacitance C2, whole by being made of four power MOSFET Q5-Q8
Current circuit forms output voltage V0, acts on load RL.
4. a kind of phase detecting circuit of radio energy transmission system according to claim 3, which is characterized in that the nothing
Voltage in lateral capacitance of line electric energy transmission system is input to ratio after divider resistance R3 and R4 are converted to small size value signal
Compared with device CMP, the square wave of generation is by after isolator ISO and digital signal processor DSP control generates and primary side fundamental wave electricity
Press the PWM wave phase with phase and obtain phase detection signal, the information of the detection signal by single pole double throw analog switch SPDT with
And it is modulated onto after RC filter apparatus on a d. c. voltage signal.
5. the parameter information detection method of a kind of radio energy transmission system, according to claim 1-4 any one of them phases
What detection circuit was realized, which is characterized in that include the following steps：
Step 1：By primary side bridge arm phase angle α, secondary side bridge arm phase angle beta, secondary side voltage current phase differenceResistance R2 is every
Parameter initialization；
Step 2：Based on synchronous circuit and phase detecting circuit to input voltage vin, input current Iin, output voltage V0, defeated
Go out electric current I0 and phase-modulation voltage Vphase is sampled；
Step 3：Calculate primary side voltage current phase difference θ, load impedance RL；
Step 4：Calculate equivalent resistance Re, equivalent reactance Xe；
Step 5：Estimate the extra impedance X of secondary side2With mutual inductance M, the mutual inductance estimation of radio energy transmission system is completed.
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| CN201810077812.4A CN108318738B (en) | 2018-01-26 | 2018-01-26 | Phase detection circuit and parameter information detection method of wireless power transmission system |
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| CN201810077812.4A CN108318738B (en) | 2018-01-26 | 2018-01-26 | Phase detection circuit and parameter information detection method of wireless power transmission system |
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Cited By (1)
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| CN110736879A (en) * | 2019-09-30 | 2020-01-31 | 中国电子科技集团公司第三十研究所 | short-wave radio frequency direct acquisition bridge type vector impedance detection method |
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| CN108318738B (en) | 2020-06-12 |
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