阅读说明：本技术 一种基于芯片的谐振电路 (Chip-based resonant circuit ) 是由 张航 徐辉 张孝忠 黄子明 许虎 郭伦强 陆伊城 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种基于芯片的谐振电路,涉及谐振调谐技术领域,包括：方波发生模块,谐振模块,电压电流采样模块,相位差检测模块,主控制模块,驱动模块,相位控制模块,输出处理模块；所述方波发生模块用于产生方波信号,谐振模块用于产生分压信号,电压电流采样模块用于采样电压电流信号,相位差检测模块用于检测电压电流相位差,主控制模块用于接收处理信号和输出驱动信号,驱动模块用于输出驱动信号,相位控制模块用于控制移相。本发明基于芯片的谐振电路采用微控制器通过对全控型器件的控制实现对电感电流的移相控制,从而对该谐振电路进行动态实时调谐控制,还利用霍尔电流传感器、运算放大器和逻辑芯片提高电压电流相位差检测精度。(The invention discloses a chip-based resonant circuit, which relates to the technical field of resonant tuning and comprises the following components: the device comprises a square wave generating module, a resonance module, a voltage and current sampling module, a phase difference detection module, a main control module, a driving module, a phase control module and an output processing module; the square wave generating module is used for generating square wave signals, the resonance module is used for generating partial pressure signals, the voltage and current sampling module is used for sampling voltage and current signals, the phase difference detection module is used for detecting voltage and current phase differences, the main control module is used for receiving processing signals and outputting driving signals, the driving module is used for outputting driving signals, and the phase control module is used for controlling phase shifting. The chip-based resonant circuit adopts the microcontroller to realize the phase shift control of the inductive current by controlling the fully-controlled device, thereby carrying out dynamic real-time tuning control on the resonant circuit, and improving the voltage and current phase difference detection precision by utilizing the Hall current sensor, the operational amplifier and the logic chip.)

1. A chip-based resonant circuit, characterized by:

the chip-based resonant circuit includes: the device comprises a square wave generating module, a resonance module, a voltage and current sampling module, a phase difference detection module, a main control module, a driving module, a phase control module and an output processing module;

the square wave generating module is used for outputting a square wave signal according to the input voltage and the driving of the switching tube;

the resonance module is connected with the output end of the square wave generation module and used for receiving the square wave signal output by the square wave generation module, generating a voltage division signal and outputting electric energy;

the voltage and current sampling module is connected with the first output end of the resonance module and is used for detecting the voltage and current condition of the resonance module and outputting a voltage and current signal;

the phase difference detection module is connected with the output end of the voltage and current sampling module and is used for detecting the phase difference of the voltage and current signals output by the voltage and current sampling module and outputting a detection result;

the main control module is connected with the output end of the phase difference detection module, is used for receiving the detection result output by the phase difference detection module, and is used for processing the detection result through an internal software system and outputting a driving signal;

the driving module is connected with the driving end of the main control module and used for receiving the driving signal output by the main control module and driving the phase control module to work;

the phase control module is connected with the second output end of the resonance module, is used for receiving the electric energy output by the resonance module, and is connected with the output end of the driving module, and is used for receiving the driving signal and controlling the switch tube to work;

the output processing module is connected with the output end of the phase control module and used for wirelessly receiving electric energy and processing the received electric energy.

2. The chip-based resonant circuit according to claim 1, wherein the square wave generation module comprises a power supply, a first switch tube, a second switch tube, a fifth capacitor and a sixth capacitor; the main control module comprises a first controller;

the first end of the power supply is connected with the drain electrode of the first switch tube and the first end of the fifth capacitor, the second end of the power supply is connected with the source electrode of the second switch tube and the first end of the sixth capacitor, the drain electrode of the first switch tube is connected with the second end of the sixth capacitor, the second end of the fifth capacitor and the source electrode of the first switch tube, and the grid electrode of the first switch tube and the grid electrode of the second switch tube are respectively connected with the first driving end and the second driving end of the first controller.

3. The chip-based resonant circuit of claim 2, wherein the resonant module comprises a first inductor, a first capacitor, and a second inductor;

the first end of the first inductor is connected with the source electrode of the first switch tube and the drain electrode of the second switch tube, the second end of the first inductor is connected with the first end of the first capacitor and the first end of the second inductor, and the second end of the first capacitor and the second end of the second inductor are both connected with the source electrode of the second switch tube.

4. The chip-based resonant circuit of claim 2, wherein the voltage-current sampling module comprises a first resistor, a first current transformer, a fifth diode, and a sixth diode;

the first output end of the first current transformer is connected with the cathode of the fifth diode and the anode of the sixth diode through the first resistor, and the second output end of the first current transformer, the anode of the fifth diode and the cathode of the sixth diode are all grounded.

5. The chip-based resonant circuit of claim 4, wherein the voltage-current sampling module further comprises a second current transformer, a sixth resistor, and a fourth capacitor;

and the first output end of the second current transformer is connected with the first end of the sixth resistor and the first end of the fourth capacitor, and the second output end of the second current transformer, the second end of the sixth resistor and the second end of the fourth capacitor are all grounded.

6. The chip-based resonant circuit of claim 5, wherein the phase difference detection module comprises a first operational amplifier, a first power supply, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a second operational amplifier and a logic chip;

the power end of the first operational amplifier is connected with the first end of a first power supply and the first end of a third resistor, the in-phase end of the second operational amplifier is connected with the anode of a sixth diode, the inverting end of the second operational amplifier is grounded through a second resistor, the output end of the first operational amplifier and the second end of the third resistor are both connected with the first input end of a logic chip, the power end of the second operational amplifier is connected with the first end of the first power supply and the first end of a fourth resistor, the in-phase end of the second operational amplifier is connected with the first end of a fourth capacitor, the inverting end of the second operational amplifier is grounded through a fifth resistor, the output end of the second operational amplifier and the second end of the fourth resistor are both connected with the second input end of the logic chip, and the output end of the logic chip is connected with the first input end of a first controller.

7. The chip-based resonant circuit of claim 3, wherein the phase control module comprises a third inductor, a second capacitor, a third switch tube and a fourth switch tube; the driving module comprises a driver;

the first end of the third inductor and the first end of the second capacitor are both connected with the first end of the second inductor, the second end of the third inductor is connected with the drain electrode of the third switching tube, the source electrode of the third switching tube is connected with the source electrode of the fourth switching tube, the drain electrode of the fourth switching tube is connected with the second end of the second capacitor, the grid electrode of the third switching tube and the grid electrode of the fourth switching tube are sequentially connected with the first driving end and the second driving end of the driver, and the input end of the driver is connected with the third driving end of the first controller.

8. The chip-based resonant circuit according to claim 7, wherein the output processing module comprises a first wireless transmission board, a second wireless transmission board, a fourth inductor, a first diode, a second diode, a third diode, a fourth diode, and a third capacitor;

the first input end of the first wireless transmission plate is connected with the drain electrode of the fourth switch tube, the second input end of the first wireless transmission plate is connected with the second end of the second inductor, the output end of the first wireless transmission plate is wirelessly connected with the input end of the second wireless transmission plate, the first output end of the second wireless transmission plate is connected with the anode of the first diode and the cathode of the second diode through the fourth inductor, the second output end of the second wireless transmission plate is connected with the cathode of the fourth diode and the anode of the third diode, the anode of the second diode and the anode of the fourth diode are connected with the first end of the third capacitor, and the cathode of the first diode and the cathode of the third diode are connected with the second end of the third capacitor.

Technical Field

The invention relates to the technical field of resonance tuning, in particular to a chip-based resonance circuit.

Background

For a passive port network comprising a capacitor, an inductor and a resistor element, the port of the passive port network may present capacitance, inductance and resistance, when the voltage U and the current I at the port of the circuit are in the same phase, and the circuit is in the resistance state, the circuit is called a resonance circuit, in the field of wireless transmission supply, the traditional resonance circuit performs frequency modulation control through a simple LLC resonance converter, when the electric energy output by the resonance circuit is wirelessly transmitted and the distance is changed, the resonance frequency drifts, so that the system cannot be maintained in a resonance state, the transmission performance of the system is reduced, and the intelligent tuning according to a chip cannot be performed, the voltage and the current at the output end of the resonance network have phase difference, thereby improving the topological loss of the resonance type soft switch and increasing the stress of the soft switch.

Disclosure of Invention

Embodiments of the present invention provide a chip-based resonant circuit to solve the problems set forth in the background art.

According to an embodiment of the present invention, there is provided a chip-based resonant circuit, including: the device comprises a square wave generating module, a resonance module, a voltage and current sampling module, a phase difference detection module, a main control module, a driving module, a phase control module and an output processing module;

the square wave generating module is used for outputting a square wave signal according to the input voltage and the driving of the switching tube;

the resonance module is connected with the output end of the square wave generation module and used for receiving the square wave signal output by the square wave generation module, generating a voltage division signal and outputting electric energy;

the voltage and current sampling module is connected with the first output end of the resonance module and is used for detecting the voltage and current condition of the resonance module and outputting a voltage and current signal;

the phase difference detection module is connected with the output end of the voltage and current sampling module and is used for detecting the phase difference of the voltage and current signals output by the voltage and current sampling module and outputting a detection result;

the main control module is connected with the output end of the phase difference detection module, is used for receiving the detection result output by the phase difference detection module, and is used for processing the detection result through an internal software system and outputting a driving signal;

the driving module is connected with the driving end of the main control module and used for receiving the driving signal output by the main control module and driving the phase control module to work;

the phase control module is connected with the second output end of the resonance module, is used for receiving the electric energy output by the resonance module, and is connected with the output end of the driving module, and is used for receiving the driving signal and controlling the switch tube to work;

the output processing module is connected with the output end of the phase control module and used for wirelessly receiving electric energy and processing the received electric energy.

Compared with the prior art, the invention has the beneficial effects that: the chip-based resonant circuit adopts the microcontroller to realize the phase shift control of the inductive current through the control of the full-control device, so that when the resonant frequency of the resonant circuit shifts, the resonant circuit is subjected to dynamic real-time tuning control, the resonant circuit is in a resonant state, the topological loss of a high-resonance soft switch is reduced, the transmission performance of a system is improved, and the phase difference detection precision is improved by sampling and detecting the phase difference of the output voltage current by utilizing the Hall current sensor, the operational amplifier and the logic chip.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced 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 based on these drawings without creative efforts.

Fig. 1 is a schematic block diagram of a chip-based resonant circuit according to an embodiment of the present invention.

Fig. 2 is a circuit diagram of a chip-based resonant circuit provided in an embodiment of the present invention.

Fig. 3 is a circuit diagram of a voltage and current sampling module and a phase difference detection module according to an embodiment of the present invention.

Reference numerals: 1. a square wave generating module; 2. a resonance module; 3. a voltage and current sampling module; 4. a phase difference detection module; 5. a main control module; 6. a drive module; 7. a phase control module; 8. and an output processing module.

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.

Example 1: referring to fig. 1, an embodiment of the present invention provides a chip-based resonant circuit, including: the device comprises a square wave generating module 1, a resonance module 2, a voltage and current sampling module 3, a phase difference detection module 4, a main control module 5, a driving module 6, a phase control module 7 and an output processing module 8;

specifically, the square wave generating module 1 is used for outputting a square wave signal according to an input voltage and a switching tube drive;

the input end of the resonance module 2 is connected with the output end of the square wave generation module 1, and is used for receiving the square wave signal output by the square wave generation module 1, generating a voltage division signal and outputting electric energy;

the input end of the voltage and current sampling module 3 is connected with the first output end of the resonance module 2, and is used for detecting the voltage and current condition of the resonance module 2 and outputting a voltage and current signal;

the input end of the phase difference detection module 4 is connected with the output end of the voltage and current sampling module 3, and is used for detecting the phase difference of the voltage and current signals output by the voltage and current sampling module 3 and outputting a detection result;

a first input end of the main control module 5 is connected with an output end of the phase difference detection module 4, and is used for receiving a detection result output by the phase difference detection module 4, processing the detection result through an internal software system, and outputting a driving signal;

the input end of the driving module 6 is connected with the driving end of the main control module 5, and is used for receiving the driving signal output by the main control module 5 and driving the phase control module 7 to work;

the input end of the phase control module 7 is connected with the second output end of the resonance module 2 and is used for receiving the electric energy output by the resonance module 2, and the control end of the phase control module 7 is connected with the output end of the driving module 6 and is used for receiving a driving signal and controlling the switching tube to work;

and the input end of the output processing module 8 is connected with the output end of the phase control module 7 and is used for wirelessly receiving electric energy and processing the received electric energy.

In a specific embodiment, the square wave generating module 1 may be driven by the main control module 5 by using a switching tube, and outputs an input voltage in a square wave form, and the specific devices included therein are not limited, and are implemented by field effect transistors; the resonant module 2 can adopt an LLC resonant circuit, and the power density and the transmission performance of a power supply are improved by tuning the resonant circuit; the voltage and current sampling module 3 can sample the voltage and current output by the resonance module 2 in a current transformer manner; the phase difference detection module 4 can calculate the phase difference of the sampling voltage and the sampling current by adopting an operational amplifier and a logic circuit; the main control module 5 can adopt a Digital Signal Processor (DSP) to receive, analyze and process signals and output driving signals to control the operation of the phase control module 7; the driver U2 can be selected by the driving module 6 to control the switching tube to work, which is not described herein; the phase control module 7 can adopt a full-control device to realize the phase shift control of the inductive current; the output processing module 8 may adopt a wireless transmission device, a rectifier and a filter capacitor to perform wireless transmission processing on the output electric energy.

Example 2: based on embodiment 1, please refer to fig. 2, in an embodiment of the chip-based resonant circuit according to the present invention, the square wave generating module 1 includes a power supply DC, a first switch M1, a second switch M2, a fifth capacitor C5, and a sixth capacitor C6; the main control module 5 comprises a first controller U1;

specifically, a first end of the power supply DC is connected to the drain of the first switch transistor M1 and the first end of the fifth capacitor C5, a second end of the power supply DC is connected to the source of the second switch transistor M2 and the first end of the sixth capacitor C6, the drain of the first switch transistor M1 is connected to the second end of the sixth capacitor C6, the second end of the fifth capacitor C5 and the source of the first switch transistor M1, and the gate of the first switch transistor M1 and the gate of the second switch transistor M2 are respectively connected to the first driving end and the second driving end of the first controller U1.

Further, the resonant module 2 includes a first inductor L1, a first capacitor C1, and a second inductor L2;

specifically, a first end of the first inductor L1 is connected to the source of the first switch tube M1 and the drain of the second switch tube M2, a second end of the first inductor L1 is connected to the first end of the first capacitor C1 and the first end of the second inductor L2, and a second end of the first capacitor C1 and a second end of the second inductor L2 are both connected to the source of the second switch tube M2.

Further, the phase control module 7 includes a third inductor L3, a second capacitor C2, a third switch tube M3, and a fourth switch tube M4; the drive module 6 comprises a driver U2;

specifically, the first end of the third inductor L3 and the first end of the second capacitor C2 are both connected to the first end of the second inductor L2, the second end of the third inductor L3 is connected to the drain of the third switching tube M3, the source of the third switching tube M3 is connected to the source of the fourth switching tube M4, the drain of the fourth switching tube M4 is connected to the second end of the second capacitor C2, the gate of the third switching tube M3 and the gate of the fourth switching tube M4 are sequentially connected to the first driving end and the second driving end of the driver U2, and the input end of the driver U2 is connected to the third driving end of the first controller U1.

Further, the output processing module 8 includes a first wireless transmission board J1, a second wireless transmission board J2, a fourth inductor L4, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, and a third capacitor C3;

specifically, a first input terminal of the first wireless transmission plate J1 is connected to the drain of the fourth switch M4, a second input terminal of the first wireless transmission plate J1 is connected to a second terminal of the second inductor L2, an output terminal of the first wireless transmission plate J1 is wirelessly connected to an input terminal of the second wireless transmission plate J2, a first output terminal of the second wireless transmission plate J2 is connected to the anode of the first diode D1 and the cathode of the second diode D2 through the fourth inductor L4, a second output terminal of the second wireless transmission plate J2 is connected to the cathode of the fourth diode D4 and the anode of the third diode D3, the anode of the second diode D2 and the anode of the fourth diode D4 are connected to the first terminal of the third capacitor C3, and the cathode of the first diode D1 and the cathode of the third diode D3 are connected to the second terminal of the third capacitor C3.

In a specific embodiment, the first switch tube M1, the second switch tube M2, the third switch tube M3 and the fourth switch tube M4 may be NPN field effect transistors (MOSFETs), wherein the first switch tube M1 and the second switch tube M2 constitute a square wave generator, which converts an input voltage into a square wave voltage, the third switch tube M3 and the fourth switch tube M4 are driven to be turned on and off by a driver U2 so as to implement phase shift control on a current of the third inductor L3, the system is continuously adjustable in an inductive range, and the third switch tube M3 and the fourth switch tube M4 respectively act on positive and negative half periods of an input excitation, when a distance of wireless power transmission changes, the main control module 5 controls control terminals of the third switch tube M3 and the fourth switch tube M4 at appropriate numerical values by using a control algorithm, so as to achieve continuous tuning; the first controller U1 can use TMS320F28335 digital signal processing chip to process data and control resonance; the driver U2 can use IR2110 to drive the chip to drive the switch tube to be switched on and off; the first wireless transmission plate J1 is a transmitting plate, the second wireless transmission plate J2 is a receiving plate, and the plurality of transmitting plates transmit electric energy and the plurality of pickup plates receive electric energy, so as to realize wireless transmission of electric energy.

Example 3: based on embodiment 2, referring to fig. 3, in an embodiment of the chip-based resonant circuit of the present invention, the voltage-current sampling module 3 includes a first resistor R1, a first current transformer U3, a fifth diode D5, and a sixth diode D6;

specifically, a first output terminal of the first current transformer U3 is connected to a cathode of the fifth diode D5 and an anode of the sixth diode D6 through a first resistor R1, and a second output terminal of the first current transformer U3, an anode of the fifth diode D5, and a cathode of the sixth diode D6 are all grounded.

Further, the voltage and current sampling module 3 further includes a second current transformer U4, a sixth resistor R6, and a fourth capacitor C4;

specifically, a first output terminal of the second current transformer U4 is connected to a first terminal of the sixth resistor R6 and a first terminal of the fourth capacitor C4, and a second output terminal of the second current transformer U4, a second terminal of the sixth resistor R6 and a second terminal of the fourth capacitor C4 are all grounded.

Further, the phase difference detection module 4 includes a first operational amplifier a1, a first power supply +12V, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second operational amplifier a2, and a logic chip U5;

specifically, a power supply end of the first operational amplifier a1 is connected to a first power supply +12V and a first end of the third resistor R3, a non-inverting end of the second operational amplifier a2 is connected to an anode of the sixth diode D6, an inverting end of the second operational amplifier a2 is grounded through the second resistor R2, an output end of the first operational amplifier a1 and a second end of the third resistor R3 are both connected to a first input end of the logic chip U5, a power supply end of the second operational amplifier a2 is connected to a first end of the first power supply +12V and a first end of the fourth resistor R4, a non-inverting end of the second operational amplifier a2 is connected to a first end of the fourth capacitor C4, a non-inverting end of the second operational amplifier a2 is grounded through the fifth resistor R5, a second end of the second operational amplifier a2 and a second end of the fourth resistor R4 are both connected to a second input end of the logic chip U5, and an output end of the logic chip U5 is connected to a first input end of the first controller U1.

In a specific embodiment, the first current transformer U3 and the second current transformer U4 may be implemented by using a hall current sensor HST18244, wherein the first current transformer U3 converts the detection current into a voltage through a first resistor R1 for voltage detection; the first operational amplifier A1 and the second operational amplifier A2 can be LM339 operational amplifiers as zero-crossing detectors; the logic chip U5 may select an or gate 4070 to synthesize a phase difference waveform from the square-wave voltage signal output by the first operational amplifier a1 and the square-wave current signal output by the second operational amplifier a 2.

In the embodiment of the invention, the square wave generation module 1 is driven and controlled by the main control module 5, the input voltage is output in a square wave form by utilizing the on-off of a switching tube, the resonance module 2 processes the received square wave signal through the resonance inductor, the excitation inductor and the resonance capacitor and outputs a partial voltage signal and electric energy, the electric energy output by the resonance module 2 is subjected to voltage and current sampling through a current transformer in the voltage and current acquisition module, zero-crossing detection is carried out by using an operational amplifier in the phase difference detection module as a zero-crossing detector and phase difference calculation is carried out by using a logic chip U5, the phase difference result is transmitted to the main control module 5, the main control module 5 calculates and analyzes the received detection result through a first controller U1 and outputs a driving signal, the driving signal is received by the driving module 6 and controls the phase control module 7 to work, wherein when the phase control module 7 is in a resonance working state, the resonant frequencies ω of the first wireless transmission board J1 and the second wireless transmission board J2 are coincident, and the resonant network of the first wireless transmission board J1 thereof outputs a zero phase angle in which the resonant frequency is(L is an inductance value of the fourth inductor L4, and C is an equivalent capacitance between the first wireless transmission board JI and the second wireless transmission board J2), the distances between the transmission boards are kept consistent, and the equivalent capacitance is kept consistent(epsilon is the product of the vacuum dielectric constant and the dielectric constant between the transmission plates, S is the area of the transmission plate, d is the distance of the transmission plate), when the distance d of the transmission plate changes, the equivalent capacitance C changes, and the impedance angle of the output end of the first wireless transmission plate(R is a load) change, the resonant network is detuned due to the change of the impedance angle θ of the first wireless transmission board J1, the first switch tube M1 and the second switch tube M2 are not operated in the soft switching state, the operation efficiency is reduced, and the resonant frequency ω of the resonant network of the second wireless transmission board J2 is changed (shifted), and it can be known from the formula of the impedance angle θ at the output end of the first wireless transmission board that under the condition that the resonant frequency ω and the load R are fixed, when the distance of the transmission board is changed, the inductance value of the resonant network needs to be adjusted to keep the impedance angle θ unchanged, and at the same time, the resonant network at the output end of the first wireless transmission board J1 has a voltage current phase difference due to the shift of the resonant frequency ω of the resonant network of the second wireless transmission board J2, the voltage current phase difference measured by the phase difference detection module 4 is received and processed by the internal software system of the first controller U1, the impedance angle of the first wireless transmission board J1 type resonant network is obtained through logic operation, the first controller U1 controls the driver to drive the trigger angle change of the third switching tube M3 and the fourth switching tube M4, so that the conduction condition of the third switching tube M3 and the fourth switching tube M4 is controlled, the first controller controls the trigger angles of the third switching tube M3 and the fourth switching tube M4 to be corresponding numerical values, the inductance value of an equivalent inductor (a third inductor L3) in the phase control module can be controlled, the resonant circuit is controlled to be in a continuous tuning effect, and the resonant circuit is in a resonant state.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.