CN112491163A - Wireless power transmission device - Google Patents

Wireless power transmission device Download PDF

Info

Publication number
CN112491163A
CN112491163A CN202011385673.5A CN202011385673A CN112491163A CN 112491163 A CN112491163 A CN 112491163A CN 202011385673 A CN202011385673 A CN 202011385673A CN 112491163 A CN112491163 A CN 112491163A
Authority
CN
China
Prior art keywords
switch tube
capacitor
current
load output
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011385673.5A
Other languages
Chinese (zh)
Other versions
CN112491163B (en
Inventor
李煌
张博深
刘鑫
杨喜军
唐厚君
高飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
Original Assignee
Shanghai Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN202011385673.5A priority Critical patent/CN112491163B/en
Publication of CN112491163A publication Critical patent/CN112491163A/en
Application granted granted Critical
Publication of CN112491163B publication Critical patent/CN112491163B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention discloses a wireless power transmission device, comprising: the system comprises a direct current stabilized power supply, a full-bridge inverter circuit, a magnetic coupling resonance circuit, a semi-bridgeless active rectifier, a load device, a current sensor, a voltage sensor and a controller; the semi-bridgeless active rectifier includes: the current sensor collects load output current; the voltage sensor collects load output voltage; the controller controls the working states of the fifth switching tube and the sixth switching tube according to the load output current and the load output voltage. The invention discloses a set of wireless electric energy transmission device suitable for charging occasions of low-power electrical equipment, which reduces the switching loss and the conduction loss of a power device, is beneficial to the model selection and the heat dissipation treatment of the power device, does not need to consider the synchronization problem of an original secondary control signal, can wirelessly charge portable electronic equipment, and has the advantages of compact structure, small volume, light weight, low cost and the like.

Description

Wireless power transmission device
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission device.
Background
At present, most electrical equipment obtains electric energy from a power grid through a cable, but the physical connection mode has the constraint of 'wired', so that the use is inconvenient and the application is limited. In recent years, Wireless Power Transfer (WPT) technology has attracted much attention in a trend toward rapid development of applications such as unmanned driving, automatic parking, and electric vehicles. The novel power electronic technology has the advantages of convenience in use and high environmental adaptability, and can overcome the defects of sparks, abrasion, noise and the like caused by traditional conductor contact type electric energy transmission.
A widely applied wireless electric energy transmission device is characterized in that a full-bridge circuit is used on an original secondary side, the topological structure is complete and has equivalent load conversion capacity, transmission characteristics such as constant voltage, constant current and constant power are realized by controlling a phase shift angle of a driving signal of a switching tube on the original secondary side, and tracking of optimal efficiency is realized by changing an equivalent load after the secondary side is equivalent to the original side. In designing a system, a parameter when the coils are completely aligned is generally used, and the mutual inductance between the coils is a certain value. In practice, however, the placement of the powered device is often subject to uncertainty, which can cause variations in the mutual inductance between the coils.
The extreme case of mutual inductance reduction is equal to the working condition of independent work of the primary coil. On the other hand, the secondary side short circuit is also one of the common serious faults, which are caused by battery failure, converter direct connection and the like. The fault tolerance capability of the charging device to parameter variations and system faults directly affects the reliability of the device. In order to improve the reliability of the system, a better scheme at present is to adopt an LCC (Inductor-capacitor-capacitor) topology for the original secondary side of the resonant network.
Under the above scheme, a common difficulty encountered by the industry and academia is the synchronization problem of the primary side and the secondary side control signals. Because the primary side and the secondary side are two sets of independent control systems, although the frequency accuracy of a Digital Signal Processor (DSP) in a High Resolution Pulse Width Modulation (HRPWM) mode is relatively High and can reach 0.002% of frequency accuracy (TMS320F28335), because the working frequency of the system is very High, a control Signal of 100kHz can generate a frequency deviation of 2Hz between the primary side and the secondary side, which will cause a phase difference of periodic variation between resonant voltages, and a periodic oscillation phenomenon of output current and output power, which is unacceptable for a WPT system which needs to provide a stable power supply for electric equipment. At present, synchronization is mainly performed by introducing an external clock or auxiliary equipment and other methods, the cost is high, an additional signal conditioning circuit is needed, and the requirements on hardware and a control algorithm are high. In addition, in order to prevent the upper and lower power switches of the same bridge arm of the full-bridge circuit from being directly connected, dead time needs to be added into a driving signal, which may cause a dead time effect, increase switching loss, and affect the quality of electric energy and the stability of a system. At present, methods for solving the dead zone problem mainly include three types: dead-zone effect minimization control, dead-zone compensation control, and dead-zone-free control, all at high cost.
Disclosure of Invention
Based on this, the invention aims to provide a wireless power transmission device to realize wireless charging of low-power electrical equipment.
To achieve the above object, the present invention provides a wireless power transmission apparatus, including:
the system comprises a direct current stabilized power supply, a full-bridge inverter circuit, a magnetic coupling resonance circuit, a semi-bridgeless active rectifier, a load device, a current sensor, a voltage sensor and a controller; the direct-current stabilized power supply is connected with the semi-bridgeless active rectifier through the full-bridge inverter circuit, the magnetic coupling resonance circuit in sequence; the controller is respectively connected with the current sensor, the voltage sensor, a second end of a fifth switching tube in the semi-bridgeless active rectifier and a second end of a sixth switching tube;
the semi-bridgeless active rectifier includes: the load device comprises a first diode, a second diode, a fifth switching tube, a sixth switching tube and a sixth capacitor, wherein the cathode of the first diode is respectively connected with the cathode of the second diode, one end of the sixth capacitor and one end of the load device, the anode of the first diode is connected with the first end of the fifth switching tube, the third end of the fifth switching tube is respectively connected with the third end of the sixth switching tube, the other end of the sixth capacitor and the other end of the load device, the anode of the second diode is connected with the first end of the sixth switching tube, and the anode of the first diode, the anode of the fifth switching tube, the anode of the second diode and the first end of the sixth switching tube are respectively connected with the magnetic coupling resonance circuit;
the current sensor is used for collecting load output current; the voltage sensor is used for collecting load output voltage; the controller is used for controlling the working states of the fifth switching tube and the sixth switching tube according to the load output current and the load output voltage.
Optionally, the controller comprises:
the selection module is used for selecting an electric energy transmission mode; when the electric energy transmission mode is a constant current transmission mode, acquiring load output current acquired by the current sensor; when the electric energy transmission mode is a constant voltage transmission mode, acquiring load output voltage acquired by the voltage sensor;
the first judgment module is used for judging whether the load output current is smaller than a set current value or not; if the load output current is smaller than the set current value, the duty ratio at the t-th moment is Dt＝Dt-1- Δ D, wherein Δ D is a duty cycle increment; if the load output current is larger than or equal to the set current value, the duty ratio at the t-th moment is Dt＝Dt-1+ΔD；
The second judgment module is used for judging whether the load output voltage is smaller than a set voltage value or not; if the load output voltage is smaller than the set voltage value, the duty ratio at the t moment is Dt＝Dt-1- Δ D; if the load output voltage is greater than or equal to the set voltage value, the duty ratio at the t-th moment is Dt＝Dt-1+ΔD；
And the execution module is used for controlling the working states of the fifth switching tube and the sixth switching tube according to the duty ratio at the t moment.
Optionally, the full-bridge inverter circuit includes:
the first capacitor, the first switch tube, the second switch tube, the third switch tube and the fourth switch tube; the positive electrode of the direct current stabilized power supply is connected with one end of the first capacitor, the first end of the first switch tube and the first end of the third switch tube respectively, the negative electrode of the direct current stabilized power supply is connected with the other end of the first capacitor, the third end of the second switch tube and the third end of the fourth switch tube respectively, the third end of the first switch tube is connected with the first end of the second switch tube, and the third end of the third switch tube is connected with the first end of the fourth switch tube.
Optionally, the magnetically coupled resonant circuit comprises:
the first inductor, the second capacitor, the third capacitor, the transformer, the fourth capacitor and the fifth capacitor;
one end of the first inductor is connected with the third end of the first switch tube, the other end of the first inductor is connected with one end of the second capacitor and one end of the third capacitor respectively, the other end of the second capacitor is connected with the third end of the third switch tube and the second end of the transformer respectively, the other end of the third capacitor is connected with the first end of the transformer, the third end of the transformer is connected with one end of the fourth capacitor, the other end of the fourth capacitor is connected with one end of the fifth capacitor and one end of the second inductor respectively, the other end of the fifth capacitor is connected with the fourth end of the transformer and the first end of the sixth switch tube respectively, and the other end of the second inductor is connected with the first end of the fifth switch tube.
Optionally, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube are MOSFETs, the first end is a drain, the second end is a gate, and the third end is a source.
Optionally, the MOSFET model is C2M 0080120D.
Optionally, the controller is TMS320F 28335.
Optionally, the rated voltage of the direct current stabilized power supply is 220V.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a set of wireless electric energy transmission device suitable for charging occasions of low-power electrical equipment, which reduces the switching loss and the conduction loss of a power device, is beneficial to the model selection and the heat dissipation treatment of the power device, does not need to consider the synchronization problem of an original secondary control signal, can wirelessly charge portable electronic equipment, and has the advantages of compact structure, small volume, light weight, low cost and the like. In addition, the wireless power transmission device can simultaneously transmit power and information without installing an additional communication module, and the system has small voltage gain, is suitable for application of converting high voltage into low voltage, and has higher efficiency. In addition, under the given main component parameters, the continuous control of the output voltage from 0V to 120V can be realized through the control of the duty ratio.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a wireless power transmission apparatus according to an embodiment of the present invention;
FIG. 2 is a flowchart of a control method according to an embodiment of the present invention;
fig. 3 is a simulation waveform diagram of the critical electrical quantities during the load short-circuit fault according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a wireless power transmission device to realize wireless charging of low-power electrical equipment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present invention discloses a wireless power transmission apparatus, the apparatus including: DC voltage-stabilized power supply ViFull-bridge inverter circuit, magnetic coupling resonant circuit, semi-bridgeless active rectifier and load device RLA current sensor, a voltage sensor and a controller; the DC stabilized voltage power supply ViThe half-bridgeless active rectifier is connected with the full-bridge inverter circuit and the magnetic coupling resonant circuit in sequence; the controller is respectively connected with the current sensor, the voltage sensor and a fifth switching tube S in the semi-bridgeless active rectifier5And a sixth switching tube S in the semi-bridgeless active rectifier6And (4) connecting. The current sensor is used for collecting load output current; the voltage sensor is used for collecting load output voltage; the controller is used for controlling the fifth switching tube S according to the load output current and the load output voltage5And the sixth switching tube S6The operating state of (c).
The semi-bridgeless active rectifier includes: first diode D1A second diode D2The fifth switch tube S5The sixth switching tube S6And a sixth capacitance C0The first diode D1Respectively with a second diode D2The cathode and the sixth capacitor C0And the load device RLIs connected to the first diode D1And the fifth switching tube S5First end ofThe third ends of the five switching tubes are respectively connected with the sixth switching tube S6Third terminal, the sixth capacitor C0And said load device RLIs connected to the other end of the second diode D2And the sixth switching tube S6Is connected to the first terminal of the first diode D1The fifth switching tube S5The first terminal of the second diode D2And the sixth switching tube S6Are connected to the magnetically coupled resonant circuits, respectively.
As an embodiment, the full-bridge inverter circuit of the present invention includes: a first capacitor CiA first switch tube S1A second switch tube S2A third switch tube S3And a fourth switching tube S4(ii) a The DC stabilized voltage power supply ViRespectively with the first capacitor CiOne end of the first switching tube S1The first end of the third switching tube S3Is connected with the first end of the DC stabilized voltage power supply ViRespectively with the first capacitor CiThe other end of the second switching tube S2And a third terminal of the fourth switching tube S4Is connected with the third end of the first switch tube S1And the second switching tube S2Is connected with the first end of the third switching tube S3And a third terminal of the fourth switching tube S4Is connected to the first end of the first housing.
As an embodiment, the magnetic coupling resonance circuit of the present invention includes: a first inductor Lp, a second inductor Ls, a second capacitor Cp and a third capacitor C1Transformer and fourth capacitor C2And a fifth capacitance Cs; one end of the first inductor Lp and the first switch tube S1The other end of the first inductor Lp is respectively connected with one end of the second capacitor Cp and the third capacitor C1Is connected with the other end of the second capacitor Cp and the third switching tube S respectively3The third terminal of the transformer is connected with the second terminal of the transformer, and the third capacitor C1And the other end of the transformer and the first end of the transformerEnd connection, the third end of the transformer and the fourth capacitor C2Is connected to the fourth capacitor C2Is connected with one end of the fifth capacitor Cs and one end of the second inductor Ls, respectively, and the other end of the fifth capacitor Cs is connected with the fourth end of the transformer and the sixth switching tube S, respectively6Is connected with the first end of the second inductor Ls, and the other end of the second inductor Ls is connected with the fifth switching tube S5Is connected to the first end of the first housing.
As an embodiment, the first switch tube S of the invention1The second switch tube S2The third switch tube S3The fourth switch tube S4The fifth switch tube S5And the sixth switching tube S6The first end is a drain electrode, the second end is a grid electrode, and the third end is a source electrode.
As an embodiment, the load device R of the inventionLIs a constant resistive load.
As one embodiment, the transformer of the present invention has a third inductance L1And a fourth inductance L2Is composed of the third inductor L1And the fourth inductance L2Are connected through mutual inductance of coils.
DC voltage-stabilized power supply ViA capacitor with a large capacitance value is connected in parallel, then the full-bridge inverter circuit is connected to generate a square wave signal with the frequency approximately equal to the resonance frequency of the LCC compensation network, and the control signal of the full-bridge inverter circuit adopts a driving mode of equally dividing the duty ratio.
The full-bridge inverter circuit works as follows: first switch tube S1The driving signal and the third switch tube S3Are identical; a second switch tube S2The driving signal and the fourth switch tube S4Are identical; first switch tube S1Driving signal and second switch tube S2Are complementary in time and the two are driven for equal time. Third switch tube S3The driving signal and the fourth switch tube S4Are complementary in time and driveThe moving time is equal. When the first switch tube S1And a fourth switching tube S4When conducting, the current loop of the primary side is the first switch tube S1Primary LCC compensation network in magnetically coupled resonant circuit (consisting of first inductance Lp, second capacitance Cp and third capacitance C)1Composition) -fourth switching tube S4-a regulated DC voltage source ViA first switching tube S1The voltage value of the inversion output is a positive value; when the second switch tube S2And a third switching tube S3When conducting, the current loop of the primary side is a third switch tube S3Primary LCC compensation network in magnetically coupled resonant circuit-second switching tube S2-a regulated DC voltage source Vi- - -a third switching tube S3The value of the inverted output voltage is a negative value.
Secondary LCC compensation network (composed of second inductor Ls and fourth capacitor C) in magnetic coupling resonance circuit2And a fifth capacitor Cs) is connected to a semi-bridgeless active rectifier, and the output side of the semi-bridgeless active rectifier is connected with a sixth capacitor C0And a load resistance. As shown in fig. 1, the half-bridgeless active rectifier is formed by replacing the switching tubes of the upper bridge arm of the full bridge with diodes, and has lower cost compared with the full bridge. The semi-bridgeless active rectifier works as follows: fifth switch tube S5And a sixth switching tube S6The driving signals are identical, the frequency of the driving signals is far less than the resonant frequency, and the switching time is arbitrary without detecting the zero crossing point of the high-frequency signals. According to the direction and the circulation path of the current, four working modes are obtained by division:
mode one, fifth switching tube S5And a sixth switching tube S6When the current is switched on, the current flows in the forward direction through the fifth switch tube S5And flows through the sixth switching tube S6The output voltage of the secondary side resonant topology is zero. The secondary side has two current loops, namely a secondary side LCC compensation network in the coupling resonance network and a fifth switching tube S5A sixth switching tube S6And a secondary LCC compensation network and a sixth capacitor C in the anti-parallel diode-coupled resonant networko-a load device RL-a sixth capacitance CoThe output current is provided by a sixth capacitor CoProvided is a method.
Second and fifth mode switch tube S5And a sixth switching tube S6When the current is switched on, the current flows through the sixth switch tube S in the positive direction6And flows through the fifth switch tube S5The output voltage of the secondary side resonant topology is zero. The secondary side has two current loops, namely a secondary side LCC compensation network in the coupling resonance network and a sixth switching tube S6A fifth switching tube S5And a secondary LCC compensation network and a sixth capacitor C in the anti-parallel diode-coupled resonant networko-a load device RL-a sixth capacitance Co。
Mode three, fifth switching tube S5And a sixth switching tube S6Off, a current flows in the forward direction through D1When the resonant current is supplied to the sixth capacitor CoCharging, output voltage rising, current loop being secondary LCC compensation network-first diode D in coupled resonant network1-a sixth capacitance Co(load device R)L) A sixth switching tube S6The secondary LCC compensation network in the anti-parallel diode-coupled resonant network, the resonant voltage being substantially equal to the output voltage.
Modal fourth and fifth switching tube S5And a sixth switching tube S6Is turned off and a current flows in the forward direction through the second diode D2At the moment, the resonant current charges the output voltage stabilizing capacitor, and the current loop is a secondary LCC compensation network-a second diode D in the coupling resonant network2-a sixth capacitance Co(load device R)L) A fifth switching tube S5The secondary LCC compensation network in the anti-parallel diode-coupled resonant network.
The third inductor L of the invention1And the fourth inductance L2The voltage of (2) is high, so that an inductance with a high withstand voltage level should be selected, and in general, the voltage stress is not higher than 90%. Duty cycle control and phase angle control have similarities. It can be considered that the fifth switch tube S in duty ratio control5And a sixth switching tube S6The switching on time is equivalent to the convergence of the zero levels of conventional phase shift angle control, i.e. the formation of the duty cycle can be regarded as the periodic variation of the phase angle between 0 ° and 180 °The result of (1). Similarly, the duty ratio can also be subjected to load conversion, the influence of the actual load on the primary side can be controllably converted, and the control on the output characteristics of constant voltage and constant current and the tracking on the optimal efficiency can be achieved.
The invention adds a voltage sensor, a current sensor and a controller on a basic circuit, and the working principle is as follows: the resonance voltage is kept unchanged, corresponding current or voltage sampling is carried out by selecting the electric energy transmission mode, and the secondary side duty ratio is used, namely the fifth switching tube S5And a sixth switching tube S6The on time accounts for the proportion of the period, the controller is controlled to obtain the expected output, when the actual output value is smaller than the expected value, the duty ratio is reduced, otherwise, the duty ratio is increased, therefore, the specific flow of controlling the duty ratio is summarized as shown in fig. 2, and meanwhile, the control flow is converted into modularization, so the controller comprises: the device comprises a selection module, a first judgment module, a second judgment module and an execution module; the selection module is used for selecting an electric energy transmission mode; when the electric energy transmission mode is a constant current transmission mode, acquiring load output current acquired by the current sensor; when the electric energy transmission mode is a constant voltage transmission mode, acquiring load output voltage acquired by the voltage sensor; the first judging module is used for judging whether the load output current is smaller than a set current value; if the load output current is smaller than the set current value, the duty ratio at the t-th moment is Dt＝Dt-1- Δ D, wherein Δ D is a duty cycle increment; if the load output current is larger than or equal to the set current value, the duty ratio at the t-th moment is Dt＝Dt-1+ Δ D; the second judging module is used for judging whether the load output voltage is smaller than a set voltage value; if the load output voltage is smaller than the set voltage value, the duty ratio at the t moment is Dt＝Dt-1- Δ D; if the load output voltage is greater than or equal to the set voltage value, the duty ratio at the t-th moment is Dt＝Dt-1+ Δ D; the execution module is used for controlling the fifth switching tube S according to the duty ratio at the t moment5And a sixth switching tube S6The operating state of (c). The execution module is used for executing the method according toControlling the fifth switching tube S by the duty ratio at the moment t5And a sixth switching tube S6The operating state of (c). The duty ratio increment Δ D in this embodiment may be selected according to actual requirements, and is selected to be 0.01 in this embodiment.
The controller further comprises a third judging module, which is used for judging that the Stop flag bit is set to be 1 and the adjusting process is finished when the difference value between the load output current and the given current or the difference value between the load output voltage and the given voltage is within an allowed error range.
In a wireless power transmission device, the fault tolerance capability to parameter variations and system faults directly affects the reliability of the device and the complexity of protecting the system. Under the fault working condition that mutual inductance is reduced and even primary side works independently, the current of the coil is kept unchanged, and the output current of the converter is reduced along with the reduction of the mutual inductance. Under the fault working condition of load short circuit, the current of the coil is slightly reduced, the whole system still works under the controllable safety working condition, and a typical waveform diagram at the moment of the fault is shown in fig. 3. In fig. 3, the failure occurrence time t is 0.05 s.
The parameters of the main components are as follows:
DC voltage-stabilized power supply Vi：0-120V。
The first capacitor is an input DC voltage-stabilizing capacitor Ci：100μF。
Sixth capacitor, namely output direct current voltage stabilizing capacitor Co：1000μF。
Power device MOSFET Q1～Q6：C2M0080120D，1200V/31.6A/0.08Ω。
First diode D1A second diode D2：1N4148。
First inductor, i.e. primary side compensation inductor Lp：20μH。
Second capacitor, i.e. primary side parallel compensation capacitor Cp：200nF。
Third capacitor, i.e. primary side series compensation capacitor C1：50nF。
Third inductance, i.e. self-inductance value L of transmitting coil1：100μH。
Primary side switching frequency f1：79kHz。
Second, secondary compensation inductance Ls：20μH。
A fifth capacitor, i.e. a secondary side, connected in parallel with a compensation capacitor Cs：200nF。
Fourth capacitor, i.e. secondary side series compensation capacitor C2：50nF。
Self-inductance value L of fourth inductor, namely receiving coil2：100μH。
Primary side switching frequency f1：7.9kHz。
Mutual inductance value M of coupling coil: 25 muH.
Load device, i.e. load resistor RL：10Ω。
Controller, i.e. digital controller DSP: TMS320F 28335.
The invention adopts the full-bridge inverter circuit and the semi-bridgeless active rectifier to realize the control of the wireless electric energy transmission device, is beneficial to the miniaturization design of the wireless electric energy transmission device, simultaneously reduces the switching loss and the conduction loss of a power device, is beneficial to the model selection and the heat dissipation treatment of the power device, does not need to consider the synchronization problem of an original secondary control signal, has simple structure, novel design, lower cost and obvious application value, and can realize the continuous control of the output voltage of 0V to 120V through the control of the duty ratio under the given main component parameters.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the core concepts of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. A wireless power transfer apparatus, the apparatus comprising:
the system comprises a direct current stabilized power supply, a full-bridge inverter circuit, a magnetic coupling resonance circuit, a semi-bridgeless active rectifier, a load device, a current sensor, a voltage sensor and a controller; the direct-current stabilized power supply is connected with the semi-bridgeless active rectifier through the full-bridge inverter circuit, the magnetic coupling resonance circuit in sequence; the controller is respectively connected with the current sensor, the voltage sensor, a second end of a fifth switching tube in the semi-bridgeless active rectifier and a second end of a sixth switching tube;
the semi-bridgeless active rectifier includes: the negative pole of the first diode is respectively connected with the negative pole of the second diode, one end of the sixth capacitor and one end of the load device, the positive pole of the first diode is connected with the first end of the fifth switch tube, the third end of the fifth switch tube is respectively connected with the third end of the sixth switch tube, the other end of the sixth capacitor and the other end of the load device, the positive pole of the second diode is connected with the first end of the sixth switch tube, and the positive pole of the first diode, the first end of the fifth switch tube, the positive pole of the second diode and the first end of the sixth switch tube are respectively connected with the magnetic coupling resonance circuit;
the current sensor is used for collecting load output current; the voltage sensor is used for collecting load output voltage; the controller is used for controlling the working states of the fifth switching tube and the sixth switching tube according to the load output current and the load output voltage.
2. The wireless power transfer apparatus of claim 1, wherein the controller comprises:
the selection module is used for selecting an electric energy transmission mode; when the electric energy transmission mode is a constant current transmission mode, acquiring load output current acquired by the current sensor; when the electric energy transmission mode is a constant voltage transmission mode, acquiring load output voltage acquired by the voltage sensor;
the first judgment module is used for judging whether the load output current is smaller than a set current value or not; if the load output current is smaller than the set current value, the duty ratio at the t-th moment is Dt＝Dt-1- Δ D, wherein Δ D is a duty cycle increment; if the load output current is larger than or equal to the set current value, the duty ratio at the t-th moment is Dt＝Dt-1+ΔD；
The second judgment module is used for judging whether the load output voltage is smaller than a set voltage value or not; if the load output voltage is smaller than the set voltage value, the duty ratio at the t moment is Dt＝Dt-1- Δ D; if the load output voltage is greater than or equal to the set voltage value, the duty ratio at the t-th moment is Dt＝Dt-1+ΔD；
And the execution module is used for controlling the working states of the fifth switching tube and the sixth switching tube according to the duty ratio at the t moment.
3. The wireless power transmission apparatus according to claim 1, wherein the full-bridge inverter circuit comprises:
the first capacitor, the first switch tube, the second switch tube, the third switch tube and the fourth switch tube; the positive electrode of the direct current stabilized power supply is connected with one end of the first capacitor, the first end of the first switch tube and the first end of the third switch tube respectively, the negative electrode of the direct current stabilized power supply is connected with the other end of the first capacitor, the third end of the second switch tube and the third end of the fourth switch tube respectively, the third end of the first switch tube is connected with the first end of the second switch tube, and the third end of the third switch tube is connected with the first end of the fourth switch tube.
4. The wireless power transfer apparatus of claim 3, wherein the magnetically coupled resonant circuit comprises:
the first inductor, the second capacitor, the third capacitor, the transformer, the fourth capacitor and the fifth capacitor;
one end of the first inductor is connected with the third end of the first switch tube, the other end of the first inductor is connected with one end of the second capacitor and one end of the third capacitor respectively, the other end of the second capacitor is connected with the third end of the third switch tube and the second end of the transformer respectively, the other end of the third capacitor is connected with the first end of the transformer, the third end of the transformer is connected with one end of the fourth capacitor, the other end of the fourth capacitor is connected with one end of the fifth capacitor and one end of the second inductor respectively, the other end of the fifth capacitor is connected with the fourth end of the transformer and the first end of the sixth switch tube respectively, and the other end of the second inductor is connected with the first end of the fifth switch tube.
5. The wireless power transmission device according to claim 3, wherein the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all MOSFETs, the first terminal is a drain, the second terminal is a gate, and the third terminal is a source.
6. The wireless power transfer apparatus of claim 5 wherein the MOSFET is of type C2M 0080120D.
7. The wireless power transfer apparatus of claim 3 wherein the controller is TMS320F 28335.
8. The wireless power transmission device according to claim 3, wherein the rated voltage of the regulated DC power supply is 220V.
CN202011385673.5A 2020-12-01 2020-12-01 Wireless power transmission device Active CN112491163B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011385673.5A CN112491163B (en) 2020-12-01 2020-12-01 Wireless power transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011385673.5A CN112491163B (en) 2020-12-01 2020-12-01 Wireless power transmission device

Publications (2)

Publication Number Publication Date
CN112491163A true CN112491163A (en) 2021-03-12
CN112491163B CN112491163B (en) 2022-12-23

Family

ID=74938561

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011385673.5A Active CN112491163B (en) 2020-12-01 2020-12-01 Wireless power transmission device

Country Status (1)

Country Link
CN (1) CN112491163B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6301128B1 (en) * 2000-02-09 2001-10-09 Delta Electronics, Inc. Contactless electrical energy transmission system
CN103208927A (en) * 2013-05-07 2013-07-17 南京航空航天大学 Disconnecting soft switching high-boost direct-current converter and control method thereof
CN106712522A (en) * 2017-01-20 2017-05-24 北京理工大学 Semi-active bridge DC-DC converter PWM-phase shift composite control method
CN108923503A (en) * 2018-09-07 2018-11-30 中国计量大学 A kind of high efficiency wireless charging device based on half-controlled rectifier circuit
CN108964291A (en) * 2018-08-29 2018-12-07 广西电网有限责任公司电力科学研究院 The radio energy transmission system and its control method of dynamic decoupling adjusting output power
CN109039091A (en) * 2018-09-12 2018-12-18 上海交通大学 A kind of booster circuit applied to wireless power transmission systems
CN109617197A (en) * 2018-12-26 2019-04-12 浙江万安亿创电子科技有限公司 Wireless power transmission circuit and its control method with failure protection function

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6301128B1 (en) * 2000-02-09 2001-10-09 Delta Electronics, Inc. Contactless electrical energy transmission system
CN103208927A (en) * 2013-05-07 2013-07-17 南京航空航天大学 Disconnecting soft switching high-boost direct-current converter and control method thereof
CN106712522A (en) * 2017-01-20 2017-05-24 北京理工大学 Semi-active bridge DC-DC converter PWM-phase shift composite control method
CN108964291A (en) * 2018-08-29 2018-12-07 广西电网有限责任公司电力科学研究院 The radio energy transmission system and its control method of dynamic decoupling adjusting output power
CN108923503A (en) * 2018-09-07 2018-11-30 中国计量大学 A kind of high efficiency wireless charging device based on half-controlled rectifier circuit
CN109039091A (en) * 2018-09-12 2018-12-18 上海交通大学 A kind of booster circuit applied to wireless power transmission systems
CN109617197A (en) * 2018-12-26 2019-04-12 浙江万安亿创电子科技有限公司 Wireless power transmission circuit and its control method with failure protection function

Also Published As

Publication number Publication date
CN112491163B (en) 2022-12-23

Similar Documents

Publication Publication Date Title
Hu et al. Improved power flow control for contactless moving sensor applications
CN103516196B (en) Switching power unit
CN102868300B (en) Switching regulaor and control equipment thereof
CN110277921B (en) Efficiency optimization method for dynamic wireless charging system
CN111726003B (en) Method for operating an electronic power converter and electronic power converter
CN103199709A (en) Double-switch flyback type power converter
CN111262442A (en) Resonance converter based ON ON/OFF control
CN202276537U (en) An X-ray high-frequency high-voltage generator conversion circuit
CN110445387B (en) Topological structure and control method of formation and grading power supply
CN111064370B (en) LLC and DAB mixed bidirectional DC-DC converter
CN113346750A (en) Soft switching in-phase buck-boost converter based on coupling inductor and control method
CN112491162B (en) Wireless power transmission device
CN112087140B (en) Multi-mode automatic switching two-stage resonance DC-DC converter
CN112491163B (en) Wireless power transmission device
CN113676049A (en) Control method of direct current converter and direct current converter
CN107659155B (en) Bidirectional DC converter and bidirectional DC conversion control method
CN107612030B (en) Photovoltaic converter with current quasi-critical continuous and device soft switch
CN113422516B (en) Method and system for PFM-PWM hybrid control of CLLC resonant converter
WO2021227407A1 (en) Direct-current electric energy generation circuit for new energy application
CN111277145B (en) Control device and control method of DC-DC conversion circuit
Reddy et al. Modified full bridge dual inductive coupling resonant converter for electric vehicle battery charging applications
Abdolkhani Single-switch soft-switched power flow controller for wireless power transfer applications
CN110829876B (en) Topological structure of single-phase solid-state transformer
CN209844843U (en) Bidirectional DC/DC converter and electric automobile
CN107659159B (en) Bidirectional DC converter and bidirectional DC conversion control method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant