CN110071562A - A kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method and system - Google Patents
A kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method and system Download PDFInfo
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- CN110071562A CN110071562A CN201910406637.3A CN201910406637A CN110071562A CN 110071562 A CN110071562 A CN 110071562A CN 201910406637 A CN201910406637 A CN 201910406637A CN 110071562 A CN110071562 A CN 110071562A
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- 238000010277 constant-current charging Methods 0.000 claims abstract description 6
- 238000010280 constant potential charging Methods 0.000 claims abstract description 5
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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
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- H02J7/025—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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Abstract
The invention discloses a kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method and systems, it include: after starting charging, high-frequency inverter compensates inductance, primary constant current compensating electric capacity and charging induction coil sending side winding by series connection primary series and receiving side incudes winding and rectifier to cell load constant-current charge；In constant current or constant voltage charging phase, the root-mean-square value of high-frequency inverter output electric current is detected in real time, the charging voltage or judge whether cell load is full of and is automatically cut off by battery management system BMS that preestimating battery loads；When detecting that BMS cutting or cell load have been filled, constant-voltage charge circuit is disconnected, and the automatic inverter power supply that disconnects exports, and stops charging.The present invention without receiving side charging voltage communication check facility, simple structure, convenient control, performance is stable, reactive loss is small, relatively low to the capacity requirement of inverter, device manufacturing is at low cost.
Description
Technical field
The present invention relates to a kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method and systems, belong to
Wireless charging technical field.
Background technique
Induction type wireless power transmission be it is a kind of being capable of safe and efficient, the magnetic coupling side that is connected conveniently by no conducting wire
Formula delivers the power to the technology in load, is constantly subjected to the extensive concern of scientific circles and academia in recent decades.This is new
Emerging and promising technology is rapidly developing, and is widely used to many commercial fields, as train power supply, electric car,
Submarine system, consumer electronics product, biomedical device and other industrial circles.Ordinary circumstance, normal load usually only need
Want constant current or constant pressure powering mode.However, battery usually requires simultaneously as a kind of special load comprising constant current and constant pressure
Two stages charging, to extend the service life and charge and discharge number of battery.Under normal conditions, constant current is used at battery charging initial stage
Charge mode, battery charging voltage rise rapidly；When battery charging voltage rises to preset charge voltage, using constant-voltage charge
Mode, this process battery charge are gradually decrease to by charging current, and battery is full of, and complete charging.Currently, used
In most of wireless charging systems for battery charging, complicated control program is generallyd use, by monitoring battery in real time
Charge information and by information by wireless communication module feedback to send side controller.This not only adds the complexity of control
Property, and increase system loss and application cost.Another scheme is to utilize spy inside circuit using switching topological structure
Property realize system constant current and constant voltage output.The program is generally divided into two kinds: one, sending side switching topological structure realize constant current and
Constant voltage output has a disadvantage in that and needs bilateral wireless communication module Real-time Feedback battery charge information.Two, it is opened up in receiving side switching
It flutters and realizes constant current and constant voltage output, have a disadvantage in that more wattless components are mounted on receiving side, increase the weight of receiving side
And cost, violate the principle of receiving side compact.
Summary of the invention
The present invention provides a kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method and system, and should
System does not need wireless communication module, and receiving side wattless component is few, and structure is simple, low cost, is not necessarily to complex control technology.
The object of the present invention is achieved like this:
A kind of sending side switching mixed topology constant current constant voltage induction type wireless charging method, which is characterized in that including following
Step:
After step 1, starting charging, high-frequency inverter compensates inductance, primary constant current compensating electric capacity by series connection primary series
And charging induction coil sending side winding and receiving side incude winding and rectifier to cell load constant-current charge；
Step 2, in constant-current charging phase, real-time detection high-frequency inverter exports the root-mean-square value of electric current, and preestimating battery is negative
The charging voltage of load；
Step 3 judges whether the charging voltage of cell load meets the switching condition from constant current to constant pressure transition process
(3), switching condition is determined by formula (1)；
In formula (1), IIThe root-mean-square value of electric current, U are exported for high-frequency inverter HBFor cell load charging voltage, RPTo fill
The equivalent parasitic resistance of electric induction coil sending side winding, RSThe equivalent parasitic electricity of winding is incuded for charging induction coil receiving side
Resistance, M are the mutual inductance value of charging induction coil, and ω is angular frequency, UDFor inverter DC input voitage value；When being unsatisfactory for from constant current
To constant pressure transition process switching condition when, continue step 2 constant-current phase until meet switching condition, go to step 4；
Step 4, when meeting from constant current to the switching condition of constant pressure transition process, automatically switch to constant-voltage charge circuit,
Realize constant-voltage charge；
Step 5, in constant voltage charging phase, real-time detection high-frequency inverter exports the root-mean-square value of electric current, judges that battery is negative
It carries and whether is full of and is automatically cut off by battery management system, detection high-frequency inverter output RMS current includes: to pass through electricity
Flow sensor and controller, real-time data acquisition high-frequency inverter export current instantaneous value；Judge cell load whether be full of and
It is automatically cut off by battery management system；
It is described that judge whether cell load is full of and is automatically cut off by battery management system be according in constant-voltage charge process
In, when cell load is full of and is automatically cut off by battery management system, i.e., system is in light condition, and high-frequency inverter is defeated at this time
The root-mean-square value of electric current is fixed value out, and is determined by formula (2)；
In formula (2), RRThe equivalent parasitic resistance of inductance is compensated for primary series；
It is described not exist in order to ensure after cell load is full of and is automatically cut off by battery management system, sending side inverter
Power output is provided, setting charging termination condition is determined by formula (3)；
Step 6, when detect battery management system cutting or cell load be filled, disconnect constant-voltage charge circuit, and
It is automatic to disconnect inverter power supply output, stop charging (6).
In a kind of above-mentioned sending side switching mixed topology constant current constant voltage induction type wireless charging method, step 1,
The input of the output connection high-frequency inverter of DC power supply；The primary string of one end series connection access of high-frequency inverter output
One end of connection compensation inductance, primary constant current compensating electric capacity and the induction coil sending side winding that charges, high-frequency inverter export another
One end is connect with the other end of charging induction coil sending side winding, is constituted constant-current charge and is sent circuit；Charging induction coil connects
One end of one end connection series connection secondary compensation capacitor of side winding is received, the other end connection rectifier of series connection secondary compensation capacitor is defeated
Enter the one end at end, the other end of the other end connection rectifier input of charging induction coil receiving side winding, composition is received back
Road；Rectifier output end connects cell load, realizes the wireless constant-current charge of induction type.
In a kind of above-mentioned sending side switching mixed topology constant current constant voltage induction type wireless charging method, step 2, detection
High-frequency inverter exports RMS current, comprising: passes through current sensor and controller, real-time data acquisition high-frequency inverter
Export current instantaneous value；It calculates high-frequency inverter and exports RMS current；
The charging voltage of the preestimating battery load is according to during constant-current charge, and high-frequency inverter exports electric current
The approximation linear function relationship of root-mean-square value and battery charging voltage value, the charging voltage of preestimating battery load.
In a kind of above-mentioned sending side switching mixed topology constant current constant voltage induction type wireless charging method, step 4,
The constant-voltage charge circuit, including constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit；Constant-voltage charge in parallel
Circuit is by primary constant-pressure compensation capacitor CRWith switching switch S1Series connection, T, which connects, compensates inductance L with primary seriesRIt is compensated with primary constant current
Capacitor CPATie point and high-frequency inverter H the other end；And switching switch S1Control terminal be connected with controller K；Series connection is permanent
Press charge circuit by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection, is connected in parallel on primary constant current compensating electric capacity CPAOn, and
Switch switch S2Control terminal be connected with controller K；
The constant-voltage charge circuit that automatically switches to is when the default root-mean-square value of high-frequency inverter H output electric current meets formula
(1) when, controller connects in constant-voltage charge circuit in parallel with series connection constant-voltage charge circuit, it may be assumed that closure switching switch S1And S2, real
Existing cell load is from constant-current charge process to the transformation of constant-voltage charge process.
Switch mixed topology constant current constant voltage induction type wireless charging method in a kind of above-mentioned sending side, step 6 works as detection
Battery management system cutting or cell load have been filled out, disconnect constant-voltage charge circuit, and automatic disconnection inverter power supply is defeated
Out, stop charging；
The disconnection constant-voltage charge circuit is to disconnect constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit, it may be assumed that is disconnected
Switch switch S1And S2；
The charging process that is automatically stopped is the control when the default root-mean-square value of high-frequency inverter H output electric current meets formula
Device processed will stop inverter power supply output, that is: stop charging.
Switch mixed topology constant current constant voltage induction type wireless charging method, including direct current in a kind of above-mentioned sending side
Source, high-frequency inverter, transmission unit, charging induction coil, receiving unit, current sensor, controller, rectifier and battery are negative
It carries, wherein
High-frequency inverter exports the DC power supply inversion of input for high-frequency ac power, passes through transmission unit and charging sense
It answers coil to receiving unit wireless induction coupled transfer high-frequency ac electric energy, is transformed to direct current by rectifier and gives cell load perseverance
Current charge；The output RMS current of current sensor and controller real-time detection high-frequency inverter, preestimating battery load
Charging voltage, when high-frequency inverter output RMS current meets formula (1), controller is by constant-voltage charge circuit in parallel and string
Join constant-voltage charge circuit to connect, that is: closure switching switch S1And S2, realize cell load from constant-current charge process to constant-voltage charge
The transformation of process；When high-frequency inverter output RMS current meets formula (3), constant-voltage charge circuit is disconnected, and from dynamic circuit breaker
Inverter power supply output is opened, cell load charging is stopped；
Transmission unit includes constant-current charge circuit, constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit；Receiving unit
Including sequentially connected reception circuit, rectifier D and it is equivalent to interior resistance RBWith ideal voltage source UBConcatenated cell load；
The charging induction coil, including sending side winding self-induction parameter are LP, resistance parameter RPCertainly with receiving side winding
Sense parameter is LS, resistance parameter RS, the mutual inductance parameter for the induction coil that charges is that M is determined by formula (4)；
In formula, IBFor the constant charge current of setting, ω is resonance angular frequency；
The constant-current charge circuit compensates inductance L by primary seriesRWith primary constant current compensating electric capacity CPAIt is connected in series, head and the tail
It is separately connected one end and the charging induction coil sending side winding L of high-frequency inverter outputPOne end, charging induction coil send
Side winding LPThe other end connection high-frequency inverter output the other end；
The primary series compensate inductance LRBy shown in formula (5)；
In formula, UBFor the constant charge voltage of setting；
The primary compensating electric capacity CPABy shown in formula (6)；
The series connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection；It is connected in parallel on primary
Constant current compensating electric capacity CPAOn；Primary constant current compensating electric capacity CPAOne end connects primary series and compensates inductance LR, other end connection charging
Induction coil sending side winding LP；Charge induction coil sending side winding LPThe other end connection high-frequency inverter output it is another
End；And switching switch S2Control terminal formed with what controller K was connected；
The primary constant-pressure compensation capacitor CPBBy shown in formula (7)；
The parallel connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CRWith switching switch S1Series connection；The connection of one end T shape
Primary series compensate inductance LRWith primary constant current compensating electric capacity CPATie point, the other end connect high-frequency inverter H the other end
With charging induction coil sending side winding LPThe other end；And switching switch S1Control terminal be connected with controller K；
The primary constant-pressure compensation capacitor CRBy shown in formula (8)；
It is described to be received back routing secondary compensation capacitor CSSelf-induction parameter with charging induction coil receiving side winding is LS, electricity
Resistance parameter is RSAfter series connection, the input terminal for being parallel-connected to rectifier is formed；
The secondary compensation capacitor CSBy shown in formula (9)；
Switch mixed topology constant current constant voltage induction type wireless charging method in a kind of above-mentioned sending side, current sensor and
Controller cooperation control switching switch S1With switching switch S2Open and close, realize constant-current charge process and constant-voltage charge mistake
The conversion of journey, and charging finishing control；
The switching switch S1With switching switch S2It is made of electronic power switch device and triggering control driving circuit；
The current sensor is undistorted when detecting the MHz grade high-frequency current of high-frequency inverter output；The controller
Including simulated measurement input circuit, analog to digital conversion circuit, electric Physical Quantity Calculation program, Detection & Controling program, output switch parameter electricity
Road, isolation and the interface circuit with triggering control driving circuit.
This system has following technical characterstic and superiority:
1. the present invention only need to introduce two switching switches in sending side, the circuit topological structure of sending side just can be changed, from
And constant current constant voltage switching circuit is formed, circuit structure is simple, at low cost.Simple control switch is only needed to switch when work, nothing
Complicated control circuit is needed, it is simple, convenient, reliably.
2. circuit topology of the invention, in system constant current output and constant voltage output, inverter output voltage and electric current are basic
Same-phase can allow inverter to be almost not injected into reactive power, therefore system loss is smaller, and drop to the capacity requirement of inverter
It is low.
3. the present invention can export the constant current and constant voltage unrelated with load under same frequency, meet battery initial stage
The requirement of constant-current charge, later period constant-voltage charge.System works under a Frequency point, is not in frequency bifurcation, guarantees
System steady operation.
4. the present invention exports the root-mean-square value of electric current by detection high-frequency inverter in real time, in constant-current charging phase to being
System charging voltage is assessed in real time, is estimated in constant voltage charging phase to charging termination condition, without from receiving side to hair
The charge information real time communication of side is sent to feed back, therefore, wireless communication module can be eliminated.Cost is not only saved, and is avoided
Communication Jamming is to adverse effect caused by charging process.
5. receiving side of the present invention only has a capacity cell, simple, light, some special application scenarios are very suitable to,
Such as: biologic medical, consumer electronics etc..
Detailed description of the invention
Fig. 1 is embodiment of the method flow chart of the present invention.
Fig. 2 is system embodiment system structure circuit diagram of the present invention.
Fig. 3 is system embodiment constant current output circuit schematic diagram of the present invention.
Fig. 4 is system embodiment constant voltage outputting circuit schematic diagram of the present invention.
Specific embodiment
It is described in detail with reference to the accompanying drawings and examples:
One, sending side switches mixed topology constant current constant voltage induction type wireless charging method
Sending side shown in Fig. 1 switches mixed topology constant current constant voltage induction type wireless charging method embodiment flow chart, by Fig. 1
It can be seen that:
It is described Step 1: high-frequency inverter compensates inductance, primary constant current compensation by series connection primary series after starting charging
Capacitor and charging induction coil sending side winding and receiving side induction winding and rectifier are to cell load constant-current charge (1):
The input of the output connection high-frequency inverter of the DC power supply；One end series connection access of high-frequency inverter output is just
One end of grade series compensation inductance, primary constant current compensating electric capacity and the induction coil sending side winding that charges, high-frequency inverter output
The other end with charging induction coil sending side winding the other end connect, constitute constant-current charge transmission circuit；Charge the line of induction
One end of one end connection series connection secondary compensation capacitor of receiving side winding is enclosed, the other end of series connection secondary compensation capacitor connects rectification
One end of device input terminal, the other end of the other end connection rectifier input of charging induction coil receiving side winding, composition connect
Withdraw road；Rectifier output end connects cell load, realizes the wireless constant-current charge of induction type.
Described real-time detection high-frequency inverter exports the root-mean-square value of electric current Step 2: in constant-current charging phase, estimates electricity
The charging voltage (2) of pond load:
The detection high-frequency inverter exports RMS current, comprising: by current sensor and controller, counts in real time
Current instantaneous value is exported according to acquisition high-frequency inverter；It calculates high-frequency inverter and exports RMS current；
The charging voltage of the preestimating battery load is according to during constant-current charge, and high-frequency inverter exports electric current
The approximation linear function relationship of root-mean-square value and battery charging voltage value, the charging voltage of preestimating battery load.
It is described Step 3: judging whether the charging voltage of cell load meets the switching item from constant current to constant pressure transition process
Part (3):
It is described to be determined from constant current to the switching condition of constant pressure transition process by formula (1).
In formula (1), IIThe root-mean-square value of electric current, U are exported for high-frequency inverter HBFor cell load charging voltage, RPTo fill
The equivalent parasitic resistance of electric induction coil sending side winding, RSThe equivalent parasitic electricity of winding is incuded for charging induction coil receiving side
Resistance, M are the mutual inductance value of charging induction coil, and ω is angular frequency, UDFor inverter DC input voitage value.
It is described Step 4: automatically switching to constant-voltage charge when meeting from constant current to the switching condition of constant pressure transition process
It realizes constant-voltage charge (4) in circuit:
The constant-voltage charge circuit, including constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit.Constant-voltage charge in parallel
Circuit is by primary constant-pressure compensation capacitor CRWith switching switch S1Series connection, T, which connects, compensates inductance L with primary seriesRIt is compensated with primary constant current
Capacitor CPATie point and high-frequency inverter H the other end；And switching switch S1Control terminal be connected with controller K；Series connection is permanent
Press charge circuit by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection, is connected in parallel on primary constant current compensating electric capacity CPAOn, and
Switch switch S2Control terminal be connected with controller K；
The constant-voltage charge circuit that automatically switches to is when the default root-mean-square value of high-frequency inverter H output electric current meets formula
(1) when, controller connects in constant-voltage charge circuit in parallel with series connection constant-voltage charge circuit, it may be assumed that closure switching switch S1And S2, real
Existing cell load is from constant-current charge process to the transformation of constant-voltage charge process.
Described real-time detection high-frequency inverter exports the root-mean-square value of electric current Step 5: in constant voltage charging phase, judges electricity
Whether pond load is full of and automatically cuts off (5) by battery management system:
The detection high-frequency inverter exports RMS current, comprising: by current sensor and controller, counts in real time
Current instantaneous value is exported according to acquisition high-frequency inverter；Judge whether cell load is full of and is automatically cut off by battery management system；
It is described that judge whether cell load is full of and is automatically cut off by battery management system be according in constant-voltage charge process
In, when cell load is full of and is automatically cut off by battery management system, i.e., system is in light condition, and high-frequency inverter is defeated at this time
The root-mean-square value of electric current is fixed value out, and is determined by formula (2).
In formula (2), RRThe equivalent parasitic resistance of inductance is compensated for primary series.
It is described not exist in order to ensure after cell load is full of and is automatically cut off by battery management system, sending side inverter
Power output is provided, setting charging termination condition is determined by formula (3).
It is described to detect that battery management system cutting or cell load have been filled Step 6: working as, it disconnects constant-voltage charge and returns
Road, and the automatic inverter power supply that disconnects exports, and stops charging (6):
The disconnection constant-voltage charge circuit is to disconnect constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit, it may be assumed that is disconnected
Switch switch S1And S2。
It is described be automatically stopped charging process be when high-frequency inverter H output electric current default root-mean-square value meet formula (3) when,
Controller will stop inverter power supply output, that is: stop charging.
The sending side switches mixed topology constant current constant voltage induction type wireless charging system, which is characterized in that including direct current
Power supply, high-frequency inverter, transmission unit, charging induction coil, receiving unit, current sensor, controller, rectifier and battery
Load.
High-frequency inverter exports the DC power supply inversion of input for high-frequency ac power, passes through transmission unit and charging sense
It answers coil to receiving unit wireless induction coupled transfer high-frequency ac electric energy, is transformed to direct current by rectifier and gives cell load perseverance
Current charge；The output RMS current of current sensor and controller real-time detection high-frequency inverter, preestimating battery load
Charging voltage, when high-frequency inverter output RMS current meets formula (1), controller is by constant-voltage charge circuit in parallel and string
Join constant-voltage charge circuit to connect, that is: closure switching switch S1And S2, realize cell load from constant-current charge process to constant-voltage charge
The transformation of process；When high-frequency inverter output RMS current meets formula (3), constant-voltage charge circuit is disconnected, and from dynamic circuit breaker
Inverter power supply output is opened, cell load charging is stopped.
Two, sending side switches mixed topology constant current constant voltage induction type wireless charging system
The system embodiment system structure circuit diagram that invention is related to shown in Fig. 2, as seen from Figure 2:
System structure includes: DC power supply, high-frequency inverter, transmission unit, charging induction coil, receiving unit, electric current
Sensor, controller, rectifier and cell load.
Working principle: high-frequency inverter exports the DC power supply inversion of input for high-frequency ac power, pass through send it is single
Member and charging induction coil to receiving unit wireless induction coupled transfer high-frequency ac electric energy, by rectifier be transformed to direct current to
Cell load constant-current charge；The output RMS current of current sensor and controller real-time detection high-frequency inverter, is estimated
The charging voltage of cell load, when high-frequency inverter output RMS current meets formula (1), controller fills constant pressure in parallel
Electrical circuit is connected with series connection constant-voltage charge circuit, that is: closure switching switch S1And S2, realize cell load from constant-current charge process
To the transformation of constant-voltage charge process；When high-frequency inverter output RMS current meets formula (3), disconnects constant-voltage charge and return
Road, and the automatic inverter power supply that disconnects exports, and stops cell load charging.
The transmission unit includes constant-current charge circuit, constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit；
The receiving unit includes sequentially connected reception circuit, rectifier D and is equivalent to interior resistance RBAnd desired voltage
Source UBConcatenated cell load.
The charging induction coil, including sending side winding self-induction parameter are LP, resistance parameter RPCertainly with receiving side winding
Sense parameter is LS, resistance parameter RS, the mutual inductance parameter for the induction coil that charges is that M is determined by formula (4).
In formula (4), IBFor the constant charge current of setting, ω is resonance angular frequency.
The constant-current charge circuit compensates inductance L by primary seriesRWith primary constant current compensating electric capacity CPAIt is connected in series, head and the tail
It is separately connected one end and the charging induction coil sending side winding L of high-frequency inverter outputPOne end, charging induction coil send
Side winding LPThe other end connection high-frequency inverter output the other end.
The primary series compensate inductance LRBy shown in formula (5).
In formula (5), UBFor the constant charge voltage of setting.
The primary compensating electric capacity CPABy shown in formula (6).
The series connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection；It is connected in parallel on primary
Constant current compensating electric capacity CPAOn；Primary constant current compensating electric capacity CPAOne end connects primary series and compensates inductance LR, other end connection charging
Induction coil sending side winding LP；Charge induction coil sending side winding LPThe other end connection high-frequency inverter output it is another
End；And switching switch S2Control terminal formed with what controller K was connected.
The primary constant-pressure compensation capacitor CPBBy shown in formula (7).
The parallel connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CRWith switching switch S1Series connection；The connection of one end T shape
Primary series compensate inductance LRWith primary constant current compensating electric capacity CPATie point, the other end connect high-frequency inverter H the other end
With charging induction coil sending side winding LPThe other end；And switching switch S1Control terminal be connected with controller K.
The primary constant-pressure compensation capacitor CRBy shown in formula (8).
It is described to be received back routing secondary compensation capacitor CSSelf-induction parameter with charging induction coil receiving side winding is LS, electricity
Resistance parameter is RSAfter series connection, the input terminal for being parallel-connected to rectifier is formed.
The secondary compensation capacitor CSBy shown in formula (9).
Current sensor and controller cooperation control switching switch S1With switching switch S2Open and close, realize constant current
The conversion of charging process and constant-voltage charge process, and charging finishing control.
The switching switch S1With switching switch S2It is made of electronic power switch device and triggering control driving circuit.
The current sensor is undistorted when detecting the MHz grade high-frequency current of high-frequency inverter output.
The controller includes simulated measurement input circuit, analog to digital conversion circuit, electric Physical Quantity Calculation program, Detection & Controling
Program, switching value output circuit, isolation and the interface circuit with triggering control driving circuit.
System embodiment constant current output circuit schematic diagram of the present invention shown in Fig. 3, as seen from Figure 3:
To put it more simply, RR,RPAnd RSIt is very small and can ignore, and circuit parameter can be simplified by shown in formula (10).
Wherein, XPAnd XSIt respectively represents sending side and receives the equivalent reactance of lateral circuit.
Equation group is write according to Kirchhoff's second law (KVL) column:
Formula (10) substitution formula (11) can must be solved:
Obviously, formula (12) works as XPWhen=0, system output currentIt is unrelated with the load resistor value of time-varying, it may be assumed that
Further, the total input impedance of system can derive:
According to formula (12), when meeting XP=0 and XSWhen=0, constant current output is can be thus achieved in system.
When ignoring the influence of mutual inductance, the condition such as formula (15) for meeting purely resistive input load is shown.
System embodiment constant voltage outputting circuit schematic diagram of the present invention shown in Fig. 4, as seen from Figure 4:
As the switching switch S in Fig. 21And S2When closure, Fig. 4 circuit enters constant-voltage charge mode.
Due to RR,RPAnd RSIt is very small, to put it more simply, can ignore, simplify circuit parameter by shown in formula (16).
Equation group is write according to Kirchhoff's second law (KVL) column:
Formula (16) substitution formula (17) can must be solved:
System output voltage can derive:
As can be seen that as A=0, system output voltageIt is unrelated with the load resistor value of time-varying, it may be assumed that
A=YLYC(YM+YS)+(YL+YC)(YPYM+YMYS+YPYS)=0 (21)
Formula (24) can be expressed as:
(16) are updated in (22) and are obtained:
According to formula (20) and formula (23), system output voltage can be derived:
Further, the total input impedance of system can derive:
According to formula (25), when formula (26) meets, the total input impedance of system shows as purely resistive:
YC+YP+YM=0 (26)
(16) are updated in (26) and are obtained:
Finally, the total input impedance of system are as follows:
In summary, Fig. 3 topology can get stable constant current output, and it is defeated to be able to achieve purely resistive when formula (15) meets
Enter impedance；When formula (23) and formula (27) meet, Fig. 4 circuit can get stable constant voltage output, and be able to achieve purely resistive input
Impedance.
The fundamental voltage output of voltage virtual value of inverter and the relationship of its input direct-current voltage are as follows:
The input voltage U of current rectifying and wave filtering circuitO, electric current IOFundamental wave virtual value and output voltage UB, electric current IBRelationship
Are as follows:
Formula (29) and (30) are substituted into formula (13), find out mutual inductance value M:
Formula (32), (33) and (34) are substituted into formula (27), find out primary series compensation inductance LRValue:
According to formula (26) and (35), primary constant-pressure compensation capacitor C is found outRValue and secondary compensation capacitor CSValue:
According to (15), (27), (32) and (33), primary constant current compensating electric capacity C is found out respectivelyPAValue and primary constant-pressure compensation
Capacitor CPBValue:
Generally, when controller controls S1And S2When simultaneously switching off, system works in constant current charging mode；Work as controller
Control S1And S2When being also turned on, system works in constant-voltage charge mode.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (7)
1. a kind of sending side switches mixed topology constant current constant voltage induction type wireless charging method, which is characterized in that including following step
It is rapid:
After step 1, starting charging, high-frequency inverter compensates inductance, primary constant current compensating electric capacity by series connection primary series and fills
Electric induction coil sending side winding and receiving side induction winding and rectifier are to cell load constant-current charge (1)；
Step 2, in constant-current charging phase, real-time detection high-frequency inverter exports the root-mean-square value of electric current, preestimating battery load
Charging voltage (2)；
Step 3 judges whether the charging voltage of cell load meets the switching condition (3) from constant current to constant pressure transition process, cuts
Condition is changed to be determined by formula (1)；
In formula (1), IIThe root-mean-square value of electric current, U are exported for high-frequency inverter HBFor cell load charging voltage, RPFor charging sense
Answer the equivalent parasitic resistance of coil sending side winding, RSThe equivalent parasitic resistance of winding, M are incuded for charging induction coil receiving side
For the mutual inductance value for the induction coil that charges, ω is angular frequency, UDFor inverter DC input voitage value；When being unsatisfactory for from constant current to perseverance
When pressing the switching condition of transition process, continues step 2 constant-current phase until meeting switching condition, go to step 4；
Step 4, when meeting from constant current to the switching condition of constant pressure transition process, automatically switch to constant-voltage charge circuit, realize
Constant-voltage charge (4)；
Step 5, in constant voltage charging phase, real-time detection high-frequency inverter exports the root-mean-square value of electric current, judges that cell load is
No to be full of and automatically cut off (5) by battery management system, detection high-frequency inverter output RMS current includes: to pass through electric current
Sensor and controller, real-time data acquisition high-frequency inverter export current instantaneous value；Judge cell load whether be full of and by
Battery management system is automatically cut off；
It is described judge cell load whether be full of and automatically cut off by battery management system be according to during constant-voltage charge, when
Cell load is full of and is automatically cut off by battery management system, i.e., system is in light condition, the electricity of high-frequency inverter output at this time
The root-mean-square value of stream is fixed value, and is determined by formula (2)；
In formula (2), RRThe equivalent parasitic resistance of inductance is compensated for primary series；
It is described not provided in order to ensure after cell load is full of and is automatically cut off by battery management system, sending side inverter
Power output, setting charging termination condition are determined by formula (3)；
Step 6, when detecting that battery management system cutting or cell load be filled, disconnect constant-voltage charge circuit, and automatic
Inverter power supply output is disconnected, charging (6) is stopped.
2. a kind of sending side according to claim 1 switches mixed topology constant current constant voltage induction type wireless charging method,
It is characterized in that, in step 1,
The input of the output connection high-frequency inverter of DC power supply；One end series connection access primary series of high-frequency inverter output are mended
Repay one end of inductance, primary constant current compensating electric capacity and the induction coil sending side winding that charges, the other end of high-frequency inverter output
It is connect with the other end of charging induction coil sending side winding, constitutes constant-current charge and send circuit；Charge induction coil receiving side
One end of one end connection series connection secondary compensation capacitor of winding, the other end of series connection secondary compensation capacitor connect rectifier input
One end, charging induction coil receiving side winding the other end connection rectifier input the other end, constitute receive circuit；It is whole
It flows device output end and connects cell load, realize the wireless constant-current charge of induction type.
3. a kind of sending side according to claim 1 switches mixed topology constant current constant voltage induction type wireless charging method,
It is characterized in that, in step 2,
It detects high-frequency inverter and exports RMS current, comprising: by current sensor and controller, real-time data acquisition is high
Frequency inverter output current instantaneous value；It calculates high-frequency inverter and exports RMS current；
The charging voltage of the preestimating battery load is according to during constant-current charge, and high-frequency inverter exports the square of electric current
The approximation linear function relationship of root and battery charging voltage value, the charging voltage of preestimating battery load.
4. a kind of sending side according to claim 1 switches mixed topology constant current constant voltage induction type wireless charging method,
It is characterized in that, in step 4,
The constant-voltage charge circuit, including constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit；Constant-voltage charge circuit in parallel
By primary constant-pressure compensation capacitor CRWith switching switch S1Series connection, T, which connects, compensates inductance L with primary seriesRWith primary constant current compensating electric capacity
CPATie point and high-frequency inverter H the other end；And switching switch S1Control terminal be connected with controller K；Series connection constant pressure is filled
Electrical circuit is by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection, is connected in parallel on primary constant current compensating electric capacity CPAOn, and switch
Switch S2Control terminal be connected with controller K；
The constant-voltage charge circuit that automatically switches to is when the default root-mean-square value of high-frequency inverter H output electric current meets formula (1)
When, controller connects in constant-voltage charge circuit in parallel with series connection constant-voltage charge circuit, it may be assumed that closure switching switch S1And S2, realize electricity
Pond is loaded from constant-current charge process to the transformation of constant-voltage charge process.
5. a kind of sending side according to claim 1 switches mixed topology constant current constant voltage induction type wireless charging method,
Be characterized in that, step 6, when detect battery management system cutting or cell load be filled, disconnect constant-voltage charge circuit, and
It is automatic to disconnect inverter power supply output, stop charging (6)；
The disconnection constant-voltage charge circuit is to disconnect constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit, it may be assumed that disconnects switching
Switch S1And S2；
The charging process that is automatically stopped is the control when the default root-mean-square value of high-frequency inverter H output electric current meets formula (3)
Device will stop inverter power supply output, that is: stop charging.
6. a kind of sending side switches mixed topology constant current constant voltage induction type wireless charging system, which is characterized in that including direct current
Source, high-frequency inverter, transmission unit, charging induction coil, receiving unit, current sensor, controller, rectifier and battery are negative
It carries, wherein
High-frequency inverter exports the DC power supply inversion of input for high-frequency ac power, passes through transmission unit and the charging line of induction
It encloses to receiving unit wireless induction coupled transfer high-frequency ac electric energy, is transformed to direct current by rectifier and is filled to cell load constant current
Electricity；The output RMS current of current sensor and controller real-time detection high-frequency inverter, the charging of preestimating battery load
Voltage, when high-frequency inverter output RMS current meets formula (1), controller is permanent by constant-voltage charge circuit in parallel and series connection
Charge circuit is pressed to connect, that is: closure switching switch S1And S2, realize cell load from constant-current charge process to constant-voltage charge process
Transformation；When high-frequency inverter output RMS current meets formula (3), constant-voltage charge circuit is disconnected, and disconnect automatically inverse
Become device for electricity output, stops cell load charging；
Transmission unit includes constant-current charge circuit, constant-voltage charge circuit in parallel and series connection constant-voltage charge circuit；Receiving unit includes
Sequentially connected reception circuit, rectifier D and is equivalent to interior resistance RBWith ideal voltage source UBConcatenated cell load；
The charging induction coil, including sending side winding self-induction parameter are LP, resistance parameter RPJoin with receiving side winding self-induction
Number is LS, resistance parameter RS, the mutual inductance parameter for the induction coil that charges is that M is determined by formula (4)；
In formula, IBFor the constant charge current of setting, ω is resonance angular frequency；
The constant-current charge circuit compensates inductance L by primary seriesRWith primary constant current compensating electric capacity CPAIt is connected in series, head and the tail are respectively
Connect one end and the charging induction coil sending side winding L of high-frequency inverter outputPOne end, charging induction coil sending side around
Group LPThe other end connection high-frequency inverter output the other end；
The primary series compensate inductance LRBy shown in formula (5)；
In formula, UBFor the constant charge voltage of setting；
The primary compensating electric capacity CPABy shown in formula (6)；
The series connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CPBWith switching switch S2Series connection；It is connected in parallel on primary constant current
Compensating electric capacity CPAOn；Primary constant current compensating electric capacity CPAOne end connects primary series and compensates inductance LR, other end connection charging induction
Coil sending side winding LP；Charge induction coil sending side winding LPThe other end connection high-frequency inverter output the other end；And
Switch switch S2Control terminal formed with what controller K was connected；
The primary constant-pressure compensation capacitor CPBBy shown in formula (7)；
The parallel connection constant-voltage charge circuit, by primary constant-pressure compensation capacitor CRWith switching switch S1Series connection；T shape connection in one end is primary
Series compensation inductance LRWith primary constant current compensating electric capacity CPATie point, the other end connection high-frequency inverter H the other end and fill
Electric induction coil sending side winding LPThe other end；And switching switch S1Control terminal be connected with controller K；
The primary constant-pressure compensation capacitor CRBy shown in formula (8)；
It is described to be received back routing secondary compensation capacitor CSSelf-induction parameter with charging induction coil receiving side winding is LS, resistance ginseng
Number is RSAfter series connection, the input terminal for being parallel-connected to rectifier is formed；
The secondary compensation capacitor CSBy shown in formula (9)；
7. a kind of sending side according to claim 6 switches mixed topology constant current constant voltage induction type wireless charging system,
It is characterized in that: current sensor and controller cooperation control switching switch S1With switching switch S2Open and close, realize constant current
The conversion of charging process and constant-voltage charge process, and charging finishing control；
The switching switch S1With switching switch S2It is made of electronic power switch device and triggering control driving circuit；
The current sensor is undistorted when detecting the MHz grade high-frequency current of high-frequency inverter output；
The controller includes simulated measurement input circuit, analog to digital conversion circuit, electric Physical Quantity Calculation program, Detection & Controling journey
Sequence, switching value output circuit, isolation and the interface circuit with triggering control driving circuit.
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| CN110474407A (en) * | 2019-08-27 | 2019-11-19 | 武汉大学 | A kind of bi-frequency control three-winding induction type wireless charging system and method |
| CN110707831A (en) * | 2019-08-27 | 2020-01-17 | 武汉大学 | Transmitting side switching three-coil constant-current constant-voltage induction type wireless charging method and system |
| CN110957796A (en) * | 2019-12-12 | 2020-04-03 | 澳门大学 | Wireless charging circuit and system |
| CN112260416A (en) * | 2020-10-29 | 2021-01-22 | 中国科学院电工研究所 | Constant-current constant-voltage induction type wireless charging system based on variable primary parameters |
| CN112721671A (en) * | 2021-01-15 | 2021-04-30 | 四川电力设计咨询有限责任公司 | Primary and secondary side circuits of electric field coupling type wireless charging system and charging method |
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| CN109728628A (en) * | 2019-01-18 | 2019-05-07 | 易事特集团股份有限公司 | A kind of constant current constant voltage induction type wireless charging system of three-winding structure |
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| CN110474407A (en) * | 2019-08-27 | 2019-11-19 | 武汉大学 | A kind of bi-frequency control three-winding induction type wireless charging system and method |
| CN110707831A (en) * | 2019-08-27 | 2020-01-17 | 武汉大学 | Transmitting side switching three-coil constant-current constant-voltage induction type wireless charging method and system |
| CN110474407B (en) * | 2019-08-27 | 2022-10-21 | 武汉大学 | Dual-frequency control three-coil induction type wireless charging system and method |
| CN110957796A (en) * | 2019-12-12 | 2020-04-03 | 澳门大学 | Wireless charging circuit and system |
| CN112260416A (en) * | 2020-10-29 | 2021-01-22 | 中国科学院电工研究所 | Constant-current constant-voltage induction type wireless charging system based on variable primary parameters |
| CN112721671A (en) * | 2021-01-15 | 2021-04-30 | 四川电力设计咨询有限责任公司 | Primary and secondary side circuits of electric field coupling type wireless charging system and charging method |
| CN112721671B (en) * | 2021-01-15 | 2022-10-25 | 四川电力设计咨询有限责任公司 | Primary and secondary side circuits of electric field coupling type wireless charging system and charging method |
| CN112937320A (en) * | 2021-03-04 | 2021-06-11 | 广西电网有限责任公司电力科学研究院 | Parameter setting method for multi-unmanned-aerial-vehicle wireless charging system |
| CN114784994A (en) * | 2022-04-07 | 2022-07-22 | 河南师范大学 | Wireless charging system based on S-PS compensation and use method |
| CN114784994B (en) * | 2022-04-07 | 2024-04-12 | 河南师范大学 | Wireless charging system based on S-PS compensation and use method |
| CN114844229A (en) * | 2022-04-12 | 2022-08-02 | 河南师范大学 | WPT system with constant current output function and parameter design method |
| CN114844229B (en) * | 2022-04-12 | 2024-05-03 | 河南师范大学 | WPT system with constant current output function and parameter design method |
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