CN110233524A - Simulate the self-resonance controlled, super-silent wireless power supply system - Google Patents
Simulate the self-resonance controlled, super-silent wireless power supply system Download PDFInfo
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- CN110233524A CN110233524A CN201910551019.8A CN201910551019A CN110233524A CN 110233524 A CN110233524 A CN 110233524A CN 201910551019 A CN201910551019 A CN 201910551019A CN 110233524 A CN110233524 A CN 110233524A
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
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- 229920002223 polystyrene Polymers 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
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- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- 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
- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H02J7/025—
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- 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
Abstract
The present invention relates to electric energy transmission fields to promote output power and efficiency, reduce external electromagnetic interference to realize automatically tracking for resonance frequency.Thus, the technical solution adopted by the present invention is that, simulate the self-resonance controlled, super-silent wireless power supply system, it is made of power supply, choke coil, capacitor, transmitting coil, magnetic core, receiving coil, full-wave rectification bridge, electric capacity of voltage regulation, resonant capacitance, coupler, zero point detection control chip and switch, the connection of first pin of power supply and choke coil, second pin of choke coil and first pin of capacitor connect, second pin ground connection of capacitor；Second pin of choke coil and the centre cap of transmitting coil connect, transmitting coil is coupled by magnetic core with receiving coil, receiving coil forms full-wave rectification bridge with the diode by only same model and connect, and the output of rectifier bridge is connect with electric capacity of voltage regulation, provides power for load.Present invention is mainly applied to super-silent wireless power supply systems to manufacture and design occasion.
Description
Technical field
The present invention relates to electric energy transmission fields, more particularly, to non-contact power supply field.
Background technique
Wheel measuring equipment such as laser radar system, rotating machinery telemetry system etc. realizes level in the operating condition
360 ° of scannings, traditional conducting wire power supply mode will appear conducting wire winding problem, be unable to satisfy power reguirements.Meanwhile equipment is in work
It is generally higher to make revolving speed under state, is powered according to contact power supply such as slip ring, brush, then the service life of system will
Will receive limitation, according to the literature, using slip ring power laser radar service life be about 1,000 hours, need periodically into
Row maintenance.In order to improve its service life, power supply mode should select non-contact power supply.
Common non-contact power supply mode has electromagnetic coupling resonance wireless power and inductively wireless power, magnetic coupling
The advantage of resonance type wireless power supply is that electric energy can be sent to relatively at a distance, but magnetic coupling resonance wireless power mode efficiency
It is low, electromagnetic interference is big, and when transimission power is larger, the size of coil is also larger, is unfavorable for integrated.At the same time, exist
In above-mentioned application, power supply distance is simultaneously little, about 1mm, therefore this system can further decrease transmitting coil and receiving coil
Distance, then by the way of inductively.
When using inductively mode is powered, in order to increase the coefficient of coup, promote power supply efficiency, reduction to dispatch from foreign news agency
Magnetic disturbance should introduce the magnetic line of force that magnetic core collects coil generation, while use current mode parallel resonance Switching Power Supply, and make circuit
Work is under the natural frequency of circuit.The characteristics of according to the circuit of above principle design with its low interference, referred to as super-silent change
Parallel operation.But in the application of slewing power supply, coil distance can generate small transformation, and due to introducing magnetic core, emission lines
Circle and receiving coil are between close coupling and loose coupling, these small distance changes will affect the resonance frequency of system, make
System can not long-term work in resonant state.Traditional mute converter is generally operational under static operating condition, cannot achieve frequency
Tracking, in order to make up this deficiency, traditional mute converter is improved to self-resonance, super by Ying Zengjia frequency-tracking system
Mute wireless power supply system.And currently used frequency tracking method, it generally requires and compares primary coil voltage and current phase
Difference or primary coil voltage and secondary coil voltage phase difference, it is all complex although can be realized automatic tuning.In order to
Guarantee that the power supply system always works in resonant state, reduce complexity in circuits, designs a kind of self-resonance of simulation control, surpasses
Mute wireless power supply system.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention is directed to propose a kind of self-resonance, the super-silent wireless confession of simulation control
Electric system.The system adjusts the switching frequency of Switching Power Supply, realizes resonance frequency by the point of zero voltage of detection transmitting coil
It automatically tracks, promotes output power and efficiency, reduce external electromagnetic interference.For this reason, the technical scheme adopted by the present invention is that simulation
The self-resonance of control, super-silent wireless power supply system, by power supply, choke coil, capacitor, transmitting coil, magnetic core, receiving coil, complete
Wave rectifier bridge, electric capacity of voltage regulation, resonant capacitance, coupler, zero point detection control chip and switch composition, the of power supply and choke coil
One pin connection, second pin of choke coil and first pin of capacitor connect, second pin ground connection of capacitor；It grips
The centre cap of second pin and transmitting coil that flow circle connects, and transmitting coil is coupled by magnetic core with receiving coil, receives
Coil forms full-wave rectification bridge with the diode by only same model and connect, and the output of rectifier bridge is connect with electric capacity of voltage regulation, is negative
It carries and power is provided, transmitting coil is in parallel with resonant capacitance, constitutes resonant cavity, and the centre cap of transmitting coil passes through coupler and zero
Point detection control chip is connected, and the grid that zero point detection control chip is switched with two is connected, and the source electrode of two switches connects respectively
The drain electrode on ground, two switches is connect respectively at the both ends of transmitting coil.
The effect of power supply is to provide electric energy for system；Choke coil and capacitor be used to guarantee it is stateful under by the electricity of circuit
Stream is continuous；The coefficient of coup for being used to improve transmitting coil and receiving coil of magnetic core, is also used to shield transmitting coil and connects
The magnetic line of force of take-up circle reduces transmitting coil and the external electromagnetic interference of receiving coil；The effect of electric capacity of voltage regulation is made in load
Voltage be steady state value；The effect of zero point detection control chip is to detect the zero point of voltage at transmitting coil centre cap, is generated
The pulse width modulation (PWM) signal of two-way opposite in phase controls two switch alternate conductions；The effect of two switches is control hair
The both ends interleaved ground of ray circle.
By using choke coil guarantee institute it is stateful time by the electric current of circuit be continuous；It improves and sends out by using magnetic core
The coefficient of coup of ray circle and receiving coil, while shielding the magnetic line of force of transmitting coil and receiving coil, reduce transmitting coil with
The external electromagnetic interference of receiving coil；Zero point detection control chip can issue fixed frequency when zero signal is not detected
Pwm signal, and when detecting zero signal, the pwm signal that frequency is zero signal frequency half can be issued.
When system starts, zero point detection control chip issue two-way opposite in phase first and frequency to be slightly below system humorous
The pwm control signal of vibration frequency makes two switch work in different conditions, and voltage can go out at the centre cap of transmitting coil at this time
The waveform of existing sine wave absolute value form, and frequency is 2 times of system resonance frequencies.Meanwhile zero point detection control chip detection
Transmitting coil center tap voltage.When zero point detection control chip detects the zero point of transmitting coil center tap voltage, zero point
The frequency for the pwm signal that detection control chip issues is consistent with the resonance frequency of system.When the resonance frequency of system fluctuates
When, zero point detection control chip can realize the tracking of system frequency according to the zero point of transmitting coil center tap voltage.
Work is switched in zero voltage switching state, linear power supply or Switching Power Supply can be used in power supply, and ceramics can be used in capacitor
Capacitor, mica capacitor or polystyrene capacitor, enameled wire can be used in transmitting coil or litz wire is made, the line of transmitting coil
Diameter, size and the number of turns make according to maximum transmission power；Magnetic powder core, iron aluminium silicon powder magnetic core or ferrite magnetic can be used in magnetic core
Core, enameled wire can be used in receiving coil or litz wire is made, and line footpath, size and the number of turns of transmitting coil are according to maximum transmitted
Power production, while meeting the following conditions: the line footpath of transmitting coil is rt, coil radius Rt, coil turn Nt；Emission lines
The line footpath of circle 6 is rr, coil radius Rr, coil turn Nr.R should then be mett=rr,Rt=Rr,Nt=2Nr。
Full-wave rectification bridge is formed by 4 with model rectifier diode, electric capacity of voltage regulation can be used ceramic condenser, mica capacitor or
Polystyrene capacitor；Ceramic condenser, mica capacitor or polystyrene capacitor can be used in resonant capacitance, and direct coupling can be used in coupler
Conjunction mode holds resistance coupled modes, when zero point detects control chip and zero signal is not detected, issues the PWM letter of constant frequency
Number control switch, when zero point, which detects control chip, detects zero signal, the PWM signal frequency of sending is zero signal frequency
Two times；Triode or power field effect transistor can be used in switch, and switch 12 should have sufficiently high pressure voltage and electric conduction
Stream.
The features of the present invention and beneficial effect are:
1) self-resonance based on Zero-cross comparator method of simulation control, super-silent wireless power supply system collect line using magnetic core
The magnetic line of force generated is enclosed, can be effectively reduced the electromagnetic interference of system external.
2) self-resonance based on Zero-cross comparator method of simulation control, super-silent wireless power supply system can automatically track power supply
The resonance frequency of system, always works in system under resonant state.
3) self-resonance based on Zero-cross comparator method of simulation control, super-silent wireless power supply system always work in resonance
The power and efficiency of wireless power can be improved in frequency.
Detailed description of the invention:
A kind of self-resonance of simulation control of Fig. 1, super-silent wireless power supply system.
In Fig. 1,1 is power supply, and 2 be choke coil, and 3 be capacitor, and 4 be transmitting coil, and 5 be magnetic core, and 6 be receiving coil, and 7 be complete
Wave rectifier bridge, 8 be electric capacity of voltage regulation, and 9 be resonant capacitance, and 10 be coupler, and 11 be zero point detection control chip, and 12 be switch
Specific embodiment
Purpose to realize the present invention, propose it is a kind of simulation control self-resonance, super-silent wireless power supply system, comprising: electricity
Source 1, choke coil 2, capacitor 3, transmitting coil 4, magnetic core 5, receiving coil 6, full-wave rectification bridge 7, electric capacity of voltage regulation 8, resonant capacitance 9,
Coupler 10, zero point detection control chip 11, switch 12.
A kind of self-resonance of simulation control, super-silent wireless power supply system, are shown in Fig. 1, first of power supply 1 and choke coil 2
Pin connection, second pin of choke coil 2 are connect with first pin of capacitor 3, second pin ground connection of capacitor 3.
Further, second pin of choke coil 2 is connect with the centre cap of transmitting coil 4, and transmitting coil 4 passes through magnetic
Core 5 is coupled with receiving coil 6, and receiving coil 6 forms full-wave rectification bridge 7 with the diode by 4 same models and connect.
Further, the output of rectifier bridge 7 is connect with electric capacity of voltage regulation 8, provides power for load.
Further, transmitting coil 4 is in parallel with resonant capacitance 9, constitutes resonant cavity.
Further, the centre cap of transmitting coil 4 detects control chip 11 with zero point by coupler 10 and is connected, zero point
Detection control chip 11 is connected with the grid of two switches 12.
Further, the source electrode of two switches 12 is grounded respectively, and the drain electrode of two switches 12 is connect respectively in transmitting coil 4
Both ends.
Further, the effect of power supply 1 is to provide electric energy for system；The effect of choke coil 2 and capacitor 3 is to guarantee all shapes
Electric current under state by circuit is continuous；One effect of magnetic core 5 is the coupled systemes for improving transmitting coil 4 and receiving coil 6
Number, another effect of magnetic core 5 are the magnetic lines of force for shielding transmitting coil 4 and receiving coil 6, reduce transmitting coil 4 and receive line
Enclose 6 external electromagnetic interferences；The effect of electric capacity of voltage regulation 8 is the voltage steady state value made in load；Zero point detection control chip 11
Effect be detect 4 centre cap of transmitting coil at voltage zero point, generate two-way opposite in phase pwm signal control two open
Close 12 alternate conductions；The effect of two switches 12 is the both ends interleaved ground for controlling transmitting coil 4.
Further, in the present invention, by using choke coil 2 guarantee institute it is stateful time by the electric current of circuit be continuous
's；The coefficient of coup of transmitting coil 4 and receiving coil 6 is improved by using magnetic core 5, while being shielded transmitting coil 4 and being received line
The magnetic line of force of circle 6 reduces transmitting coil 4 and the external electromagnetic interference of receiving coil 6；Zero point detection control chip 11 is not detecting
When to zero signal, when can issue the pwm signal of fixed frequency, and detect zero signal, can issue frequency is zero point
The pwm signal of signal frequency half.
Further, when system starts, zero point detection control chip 11 issues two-way opposite in phase and frequency first
The slightly below pwm control signal of system resonance frequencies makes two work of switch 13 in different conditions, at this time in transmitting coil 4
Voltage will appear the waveform of sine wave absolute value form at heart tap, and frequency is 2 times of system resonance frequencies.Meanwhile zero point
Detection control chip 11 detects 4 center tap voltage of transmitting coil.Zero point detection control chip 11 detects 4 center of transmitting coil
When the zero point of tap voltage, the frequency for the pwm signal that zero point detection control chip 11 issues is consistent with the resonance frequency of system.When
When the resonance frequency of system fluctuates, zero point detection control chip 11 can be according to the zero of 4 center tap voltage of transmitting coil
Point realizes the tracking of system frequency.
Further, the work of switch 13, can be effectively compared with Small Switch Losses, the effect of lifting system in zero voltage switching state
Rate.
Further, the common power supply such as linear power supply, Switching Power Supply can be used in power supply 1.Such as use the bright limited public affairs of latitude electronics
Take charge of the Switching Power Supply of model LRS-50-24.
Further, common choke coil or the biggish inductance of inductance can be used in choke coil 2.Such as use inductance
For the duolateral inductance of 220uH.
Further, ceramic condenser, mica capacitor, polystyrene capacitor etc. can be used in capacitor 3.Such as use capacitance for
The ceramic condenser of 0.047uF.
Further, transmitting coil 4 can be used enameled wire, litz wire etc. and be made.Line footpath, the size of transmitting coil 4
It is made with the number of turns according to maximum transmission power.It uses line footpath such as the enameled wire of 0.8mm, is fabricated to internal diameter 15mm, outer diameter 35mm,
The coil of 36 circle of the number of turns.
Further, magnetic powder core, iron aluminium silicon powder magnetic core, FERRITE CORE etc. can be used in magnetic core 5.Such as use model
The FERRITE CORE of GU36.
Further, receiving coil 6 can be used enameled wire, litz wire etc. and be made.Line footpath, the size of transmitting coil 6
It is made with the number of turns according to maximum transmission power.Meet the following conditions simultaneously: setting the line footpath of transmitting coil 4 as rt, coil radius be
Rt, coil turn Nt；The line footpath of transmitting coil 6 is rr, coil radius Rr, coil turn Nr.R should then be mett=rr,Rt
=Rr,Nt=2Nr.It uses line footpath such as the enameled wire of 0.8mm, is fabricated to internal diameter 15mm, outer diameter 35mm, the coil of 18 circle of the number of turns.
Further, full-wave rectification bridge 7 can be formed by 4 with model rectifier diode.As using model 1N5819
Rectifier diode.
Further, ceramic condenser, mica capacitor, polystyrene capacitor etc. can be used in electric capacity of voltage regulation 8.Such as use capacitance for
The ceramic condenser of 1uF.
Further, ceramic condenser, mica capacitor, polystyrene capacitor etc. can be used in resonant capacitance 9.Such as use capacitance for
The ceramic condenser of 10uF.
Further, coupler 10 can be used direct coupling system, hold and hinder coupled modes etc..Such as use resistance value for 100k Ω
Resistance.
Further, common resonance lamp ballast control chip can be used in zero point detection control chip 11.It is examined in zero point
When zero signal is not detected in observing and controlling coremaking piece 11, the pwm signal control switch 12 of constant frequency is issued, is controlled when zero point detects
When chip 11 detects zero signal, the PWM signal frequency of sending is two times of zero signal frequency.Such as use model
The resonance lamp ballast of UC1872 controls chip.
Further, triode, power field effect transistor etc. can be used in switch 12.Switch 12 should have sufficiently high resistance to
Pressure value and conducting electric current.Such as use the power field effect transistor of model INR540N.
Claims (6)
1. a kind of self-resonance of simulation control, super-silent wireless power supply system, characterized in that by power supply, choke coil, capacitor, hair
Ray circle, magnetic core, receiving coil, full-wave rectification bridge, electric capacity of voltage regulation, resonant capacitance, coupler, zero point detection control chip and open
Composition, first pin connection of power supply and choke coil are closed, second pin of choke coil and first pin of capacitor connect,
Second pin of capacitor is grounded；Second pin of choke coil and the centre cap of transmitting coil connect, and transmitting coil passes through
Magnetic core is coupled with receiving coil, and receiving coil forms full-wave rectification bridge with the diode by only same model and connect, rectifier bridge
Output is connect with electric capacity of voltage regulation, provides power for load, and transmitting coil is in parallel with resonant capacitance, constitutes resonant cavity, transmitting coil
Centre cap be connected by coupler and zero point detection control chip, zero point detection controls the grid phase of chip and two switches
Even, the source electrode of two switches is grounded respectively, and the drain electrode of two switches is connect respectively at the both ends of transmitting coil.
2. the self-resonance of simulation control as described in claim 1, super-silent wireless power supply system, characterized in that the work of power supply
With being to provide electric energy for system；Choke coil and capacitor for guarantees stateful time by the electric current of circuit be continuous；Magnetic core
For improving the coefficient of coup of transmitting coil and receiving coil, be also used to shield the magnetic line of force of transmitting coil and receiving coil,
Reduce transmitting coil and the external electromagnetic interference of receiving coil；The effect of electric capacity of voltage regulation is the voltage steady state value made in load；
The effect of zero point detection control chip is to detect the zero point of voltage at transmitting coil centre cap, generates the arteries and veins of two-way opposite in phase
It rushes width modulated pwm signal and controls two switch alternate conductions；The effect of two switches is to control the both ends alternating of transmitting coil
Ground connection.
3. the self-resonance of simulation control as described in claim 1, super-silent wireless power supply system, characterized in that by using
Choke coil guarantee institute it is stateful time by the electric current of circuit be continuous；Transmitting coil and receiving coil are improved by using magnetic core
The coefficient of coup, while shielding the magnetic line of force of transmitting coil and receiving coil, reduce transmitting coil and the external electricity of receiving coil
Magnetic disturbance；Zero point detection control chip can issue the pwm signal of fixed frequency when zero signal is not detected, and detect
When to zero signal, the pwm signal that frequency is zero signal frequency half can be issued.
4. the self-resonance of simulation control as described in claim 1, super-silent wireless power supply system, characterized in that start to work
When, zero point detection control chip issues two-way opposite in phase first and frequency is slightly below the pwm control signals of system resonance frequencies,
Make two switch work in different conditions, voltage will appear sine wave absolute value form at the centre cap of transmitting coil at this time
Waveform, and frequency is 2 times of system resonance frequencies.Meanwhile zero point detection control chip detects transmitting coil center tap voltage.
When zero point detection control chip detects the zero point of transmitting coil center tap voltage, the PWM of zero point detection control chip sending
The frequency of signal and the resonance frequency of system are consistent.When the resonance frequency of system fluctuates, zero point detection control chip energy
Enough tracking that system frequency is realized according to the zero point of transmitting coil center tap voltage.
5. the self-resonance of simulation control as described in claim 1, super-silent wireless power supply system, characterized in that switch work
In zero voltage switching state, linear power supply or Switching Power Supply is can be used in power supply, and ceramic condenser, mica capacitor or poly- can be used in capacitor
Styrene capacitor, enameled wire can be used in transmitting coil or litz wire is made, line footpath, size and the number of turns of transmitting coil according to
Maximum transmission power production；Magnetic powder core, iron aluminium silicon powder magnetic core or FERRITE CORE, receiving coil, which can be used, in magnetic core can be used paint
Envelope curve or litz wire are made, and line footpath, size and the number of turns of transmitting coil make according to maximum transmission power, at the same meet with
Lower condition: the line footpath of transmitting coil is rt, coil radius Rt, coil turn Nt；The line footpath of transmitting coil 6 is rr, coil half
Diameter is Rr, coil turn Nr.R should then be mett=rr,Rt=Rr,Nt=2Nr。
6. the self-resonance of simulation control as described in claim 1, super-silent wireless power supply system, characterized in that full-wave rectification
Bridge is formed by 4 with model rectifier diode, and ceramic condenser, mica capacitor or polystyrene capacitor can be used in electric capacity of voltage regulation；It is humorous
Ceramic condenser, mica capacitor or polystyrene capacitor can be used in vibration capacitor, and coupler can be used direct coupling system or hold resistance coupling
Conjunction mode issues the pwm signal control switch of constant frequency when zero point detects control chip and zero signal is not detected, when
When zero point detection control chip detects zero signal, the PWM signal frequency of sending is two times of zero signal frequency；Switch can
Using triode or power field effect transistor, switch 12 should have sufficiently high pressure voltage and conducting electric current.
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| CN201910551019.8A CN110233524B (en) | 2019-06-24 | 2019-06-24 | Analog controlled self-resonance and ultra-silent wireless power supply system |
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| CN201910551019.8A CN110233524B (en) | 2019-06-24 | 2019-06-24 | Analog controlled self-resonance and ultra-silent wireless power supply system |
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| CN110233524B CN110233524B (en) | 2023-09-26 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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