CN102005924A - Control method for non-contact electric energy transmission - Google Patents
Control method for non-contact electric energy transmission Download PDFInfo
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- CN102005924A CN102005924A CN2009100703307A CN200910070330A CN102005924A CN 102005924 A CN102005924 A CN 102005924A CN 2009100703307 A CN2009100703307 A CN 2009100703307A CN 200910070330 A CN200910070330 A CN 200910070330A CN 102005924 A CN102005924 A CN 102005924A
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Abstract
The invention discloses a control method for non-contact electric energy transmission. In the method, a phase difference is obtained by detecting and calculating the output voltage and current of a non-contact electric energy transmission system inversion mechanism, and input into a PI regulator and an oscillation link to adjust a drive frequency of an inverter; and after a transient process, the phase difference between the inversion output voltage and current is zero so as to realize adaptive resonance control of a circuit. Through the invention, only the output voltage and current of the inversion mechanism needs to be detected, the separability of a receiving mechanism and a sending mechanism of the system is guaranteed; the adaptive resonance control function is completely implemented by a hardware circuit without a complex control algorithm; the control method has adaptive control capability against load change and has adjustment function on the changes of all device parameters output after inversion; and the system is kept working in a resonant status so as to maximize the output power and the transmission efficiency and promote the practical progress of the non-contact electric energy transmission technology.
Description
Technical field
The invention belongs to electric and electronic technical field, relate to non-contact electric energy transmission system, particularly a kind of control method of non-contact electric energy transmission system.
Background technology
In science and technology was looked into the document scope of newly being looked into, domestic had only two pieces of documents to inquire into the problem of resonance control aspect in the non-contact electric energy transmission system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of self-adapting resonance control method that is used for the non-contact electric energy transmission, solution is because of the difference of building-out capacitor and the change of load, the natural resonance frequency of resonant circuit is offset, causes problems such as the rapid reduction of through-put power and efficiency of transmission.
In order to realize above-mentioned task, the technical solution that the present invention takes is as follows:
This method is by to the detection of the output voltage of non-contact electric energy transmission system inversion mechanism, electric current with calculate phase difference, being input to pi regulator and oscillation element adjusts the driving frequency of inverter, after one section transient process, make that the phase difference of inverter output voltage, electric current is zero, thereby realize the self-adapting resonance control of circuit.
This control system mainly is made up of testing circuit, phase compensation link, phase discriminator PD, loop filter LPF, pi regulator, voltage controlled oscillator VCO and drive circuit.Testing circuit detects and obtains induction coupling primary current in the non-contact electric energy transmission system, be input to the primary current signal after the phase compensation link obtains the time-delay that testing circuit causes compensated, the drive signal that this primary current signal and drive circuit send is input to phase discriminator PD simultaneously, and phase discriminator PD obtains the corresponding error voltage U with two phase of input signals difference θ
d(t), the output voltage U through obtaining changing behind loop filter LPF, the pi regulator
c(t), be entered into voltage controlled oscillator VCO; The frequency of oscillation of voltage controlled oscillator VCO changes with the variation of input voltage, and frequency variation signal is offered drive circuit, forms the drive signal of corresponding frequencies.After one section transient process, the phase difference of inverter output voltage and former limit input current is zero, and circuit reaches new resonance condition.
The invention has the beneficial effects as follows only needs the output voltage and the electric current of inversion mechanism are detected, and has guaranteed the separability of system's reception and transmitting mechanism, and the self-adapting resonance controlled function does not need complicated control algolithm all by the hardware circuit realization.This technology not only has auto-adaptive controling ability to load variations, and the variation of all component parameters after the inversion output all had regulating action, thereby the system of assurance always works in resonance condition, make power output and efficiency of transmission reach maximum, this practical application to the non-contact electric energy transmission technology has great importance.
Description of drawings
Fig. 1 is based on the self-adapting resonance control principle figure of the non-contact electric energy transmission system of phase-locked loop.
Fig. 2 is based on the system simulation model figure of MATLAB/SIMULINK.
Embodiment
Be described in detail specific embodiments of the invention below in conjunction with technical scheme and accompanying drawing.
As shown in Figure 1, figure is the self-adapting resonance control principle figure based on the non-contact electric energy transmission system of phase-locked loop.Testing circuit detects and is converted to the input signal that meets the control circuit standard to the current signal of primary coil; The phase compensation link is used to compensate the time delay that testing circuit causes; Phase discriminator compares the phase place of detected current signal phase place and voltage controlled oscillator output signal, produces the error voltage U corresponding to two signal phase differences
d(t); Loop filter, one side is utilized the low-pass characteristic of self, filtering error voltage U
d(t) radio-frequency component in and noise to guarantee the desired performance of loop, increase the stability of system; Utilize discharging and recharging of filter capacitor on the other hand, the input voltage of voltage controlled oscillator VCO is changed, and then change the frequency of oscillation of VCO; Pi regulator makes control system have good dynamic stability and less steady-state error; The output frequency of voltage controlled oscillator VCO is with the output voltage U of pi regulator
c(t) variation and changing.
When inverter is operated in resonance condition, the voltage of resonant circuit and electric current same-phase, the phase demodulation ring is input as zero, and the output of pi regulator is constant, and the voltage controlled oscillator frequency of oscillation remains unchanged.When load or other links change, will cause voltage and current and phase difference to change.At this moment, phase discriminator changes input phase difference θ into corresponding error voltage U
d(t), the output voltage U through obtaining changing behind filtering link and the pi regulator
c(t), the frequency of oscillation of voltage controlled oscillator changes with the variation of input voltage, and frequency variation signal is offered the drive signal that drives link formation corresponding frequencies.After one section transient process, the phase difference of input voltage and electric current is zero, and circuit reaches new resonance condition.
According to above-mentioned analysis, built analogue system with MATLAB/SIMULINK, as shown in Figure 2, analogue system constitutes by bridge inverter main circuit, induction coupling, single phase bridge type rectifier circu with based on the self-adapting resonance controlling unit of phase-locked loop.
Claims (1)
1. one kind is used for the non-contact electric energy transfer control method, it is characterized in that: control system comprises testing circuit, phase compensation link, phase discriminator PD, loop filter LPF, pi regulator, voltage controlled oscillator VCO and drive circuit; Testing circuit detects and obtains induction coupling primary current in the non-contact electric energy transmission system, be input to the primary current signal after the phase compensation link obtains the time-delay that testing circuit causes compensated, the drive signal that this primary current signal and drive circuit are sent is input to phase discriminator PD simultaneously, and phase discriminator PD obtains the corresponding error voltage U with two phase of input signals difference θ
d(t), the output voltage U through obtaining changing behind loop filter LPF, the pi regulator
c(t), be entered into voltage controlled oscillator VCO; The frequency of oscillation of voltage controlled oscillator VCO changes with the variation of input voltage, and frequency variation signal is offered drive circuit, forms the drive signal of corresponding frequencies; After one section transient process, the phase difference of inverter output voltage and former limit input current is zero, and circuit reaches new resonance condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100703307A CN102005924A (en) | 2009-09-03 | 2009-09-03 | Control method for non-contact electric energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100703307A CN102005924A (en) | 2009-09-03 | 2009-09-03 | Control method for non-contact electric energy transmission |
Publications (1)
| Publication Number | Publication Date |
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| CN102005924A true CN102005924A (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100703307A Pending CN102005924A (en) | 2009-09-03 | 2009-09-03 | Control method for non-contact electric energy transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702113A (en) * | 2015-02-16 | 2015-06-10 | 湘潭大学 | Device and method for realizing ZVC (Zero Voltage Switching) soft switch based on frequency tracking |
| WO2020125112A1 (en) * | 2018-12-17 | 2020-06-25 | 华为技术有限公司 | Phase calibration circuit and method for receiving end, and receiving end |
-
2009
- 2009-09-03 CN CN2009100703307A patent/CN102005924A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702113A (en) * | 2015-02-16 | 2015-06-10 | 湘潭大学 | Device and method for realizing ZVC (Zero Voltage Switching) soft switch based on frequency tracking |
| CN104702113B (en) * | 2015-02-16 | 2017-03-01 | 湘潭大学 | Device and method is realized based on the wireless power transmission systems ZVS Sofe Switch of frequency-tracking |
| WO2020125112A1 (en) * | 2018-12-17 | 2020-06-25 | 华为技术有限公司 | Phase calibration circuit and method for receiving end, and receiving end |
| US11038433B2 (en) | 2018-12-17 | 2021-06-15 | Huawei Technologies Co., Ltd. | Phase alignment circuit and method of receive end, and receive end |
| US11482941B2 (en) | 2018-12-17 | 2022-10-25 | Huawei Technologies Co., Ltd. | Phase alignment circuit and method of receive end, and receive end |
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Application publication date: 20110406 |