CN108551211A - A kind of closed loop control method of mobile wireless electric energy Transmission system efficiency optimization - Google Patents
A kind of closed loop control method of mobile wireless electric energy Transmission system efficiency optimization Download PDFInfo
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- CN108551211A CN108551211A CN201810349048.1A CN201810349048A CN108551211A CN 108551211 A CN108551211 A CN 108551211A CN 201810349048 A CN201810349048 A CN 201810349048A CN 108551211 A CN108551211 A CN 108551211A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005457 optimization Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract 2
- 230000005611 electricity Effects 0.000 claims description 3
- 239000013256 coordination polymer Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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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
-
- H02J7/025—
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of closed loop control methods of mobile wireless electric energy Transmission system efficiency optimization, include the following steps：Mobile wireless electric energy Transmission system is built, the circuit of the system includes sequentially connected DC power supply, primary side regulating circuit, high-frequency inverter circuit, primary side compensation circuit, primary coil, secondary coil, secondary regulating circuit and load in compensation circuit, current rectifying and wave filtering circuit, pair；Determine the circuit parameter of mobile wireless electric energy Transmission system；Detect output voltage and secondary coil electric current；In conjunction with the circuit parameter that upper step detects, the duty ratio for adjusting former secondary side regulating circuit realizes that system effectiveness is optimal and output voltage is constant respectively.The present invention mutual inductance or load when changing in electric vehicle operational process, mutual inductance and load without detecting real-time change can be realized that system output voltage is constant and efficiency optimization, easy to control, it is easy to accomplish.
Description
Technical field
The invention belongs to wireless power transmission technical fields, and in particular to a kind of mobile wireless electric energy Transmission system efficiency
Optimal closed loop control method.
Background technology
Wireless transmission is a kind of electric energy transmission mode of safe and convenient, have it is flexible and convenient to use, safeguard less, be suitable for disliking
Bad environment is easily achieved the advantages of unmanned automatic power and mobile power supply.Magnet coupled resonant type wireless electric energy transmission technology compared with
The demand for meeting distance, efficiency, power and safety etc. well, in electric vehicle, consumer electronics, sensor and implantation equipment
Equal fields have broad application prospects.In mobile type electric automobile wireless electric energy Transmission system, due to former secondary coil it
Between the factors such as the coefficient of coup, load can occur to change at random, the efficiency of system and the stability of operation, safety can be reduced in this way
Property.
The optimal control method of traditional realization system effectiveness is broadly divided into two classes：First, real-time using mutual inductance detection technique
Detecting system mutual inductance realizes that system effectiveness is optimal by impedance matching, but detects mutual inductance in this control mode in real time and compare
It is difficult；Second is that without detecting mutual inductance, the optimum efficiency point of searching system is disturbed by increase, this control mode can make system exist
It is vibrated at optimum efficiency point, causes energy dissipation.Therefore, it is necessary to a kind of control strategies again will not without detecting mutual inductance
So that system is vibrated at optimum efficiency point, realizes the charging of system high efficiency rate.
Invention content
In order to overcome the problems of the above-mentioned prior art, the purpose of the present invention is to provide a kind of mobile wireless electric energy
The closed loop control method of Transmission system efficiency optimization.
In order to achieve the above objectives, the present invention is achieved through the following technical solutions：
A kind of closed loop control method of mobile wireless electric energy Transmission system efficiency optimization, includes the following steps：
Step 1：Build mobile wireless electric energy Transmission system, the circuit of the system include sequentially connected DC power supply,
Primary side regulating circuit, high-frequency inverter circuit, primary side compensation circuit, primary coil, secondary coil, secondary side compensation circuit, rectification filter
Wave circuit, secondary side regulating circuit and load；
Step 2：Determine the circuit parameter of mobile wireless electric energy Transmission system；
Step 3：Detect output voltage and secondary coil electric current；
Step 4：Obtained circuit parameter is detected in conjunction with step 3, and closed loop control is carried out to mobile wireless electric energy Transmission system
System.
The present invention, which further improves, to be, in step 1, primary side compensation circuit is compensated using LCC types, secondary side compensation circuit
It is compensated using S types；Former pair side regulating circuit is all made of BUCK-BOOST circuits；Primary side regulating circuit is provided with impedance matching mould
Block, the duty ratio for the secondary coil current control primary side regulating circuit which obtains according to detection；Secondary side pressure regulation
Circuit is provided with Isobarically Control module, and the controller of the Isobarically Control module acquires output voltage, then by output voltage and exports
Then the result of PI operations is limited the modulated signal after amplitude as pair side regulating circuit by the given carry out PI operations of voltage,
And then control the duty ratio of secondary side regulating circuit.
The present invention, which further improves, to be, in step 2, circuit parameter includes direct current power source voltage value Uin, high-frequency inversion
Circuit work angular frequency, primary side compensation circuit CP、C1Capacitance, primary coil LP、L1Inductance value, secondary side capacitance C2Electricity
Capacitance, secondary coil L2Inductance value and primary coil series equivalent resistance R1Resistance value, secondary coil series equivalent electricity
Hinder R2Resistance value, load RLResistance value and output voltage UL。
The present invention, which further improves, to be, high-frequency inverter circuit work angular frequency is mended with primary side compensation circuit and secondary side
The resonance angular frequency for repaying circuit is equal.
The present invention, which further improves, to be, in step 4, realizes primary side duty ratio and secondary coil when system effectiveness is optimal
Relationship between electric current is as follows：
Compared with prior art, the present invention has technique effect beneficial below：
The present invention provides a kind of closed loop control methods of mobile wireless electric energy Transmission system efficiency optimization, compared to tradition
Closed loop control method, the advantage that the present invention has precision high, easy to implement.
Further, closed loop control method proposed by the present invention need not detect the mutual inductance and load of real-time change, it is only necessary to
The secondary side coupling coil electric current of detection, output voltage UL。
Further, closed loop control method proposed by the present invention ensures that system is made to load model in width while output voltage is constant
Enclose interior realization efficiency optimization.
Description of the drawings
Fig. 1 is mobile wireless electric energy Transmission system；
Fig. 2 is mobile wireless electric energy Transmission system open loop equivalent circuit diagram；
Fig. 3 is primary coil and secondary coil current waveform figure (M=15 μ H, RL=10 Ω, Uref=45V)；
Fig. 4 is output voltage waveform (M=15 μ H, RL=10 Ω, Uref=45V)；
Fig. 5 is primary coil and secondary coil current waveform figure (M=20 μ H, RL=20 Ω, Uref=45V)；
Fig. 6 is output voltage waveform (M=20 μ H, RL=20 Ω, Uref=45V).
Specific implementation mode
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, and described is to the present invention
It explains rather than limits.
1) mobile wireless electric energy Transmission system is as shown in Figure 1.Wherein, circuit system includes sequentially connected direct current input
Module, primary side regulating circuit, high-frequency inverter circuit, primary side resonant network, the secondary regulating circuit in resonant network, rectifier bridge, pair
And load.
In conjunction with shown in Fig. 1, the direct current input module is by DC power supply UinComposition, the high-frequency inverter circuit are switch member
The full bridge inverter of part composition, the primary side resonant network is the LCC types circuit of transmitting coil and compensation circuit composition, described
Secondary side resonant network is receiving coil and S types (tandem type) circuit that compensation circuit forms, and the rectifier bridge forms for diode
Full bridge rectifier, the regulating circuit is BUCK-BOOST circuits.
The primary side regulating circuit is provided with impedance matching module, the mutual inductance value which obtains according to load and detection
Control primary side regulating circuit duty ratio.Secondary side regulating circuit is provided with Isobarically Control module, which samples according to output voltage
Value and the secondary side regulating circuit duty ratio of output voltage reference value control.
2) the open loop equivalent circuit of mobile wireless electric energy Transmission system is as shown in Fig. 2, system effectiveness is：
In order to improve system effectiveness, load needs to meetBut it is transported in electric vehicle
During row, R is loadedLAll being with mutual inductance M can be changed, the resistance R of conversion to rectifier bridge input sider-inIt is imitated with system is made
Resistance R when rate is optimalr-in-ηmaxIt is not necessarily equal.Therefore, it in order to make system reach maximal efficiency, needs to increase impedance matching
Link, the duty ratio by adjusting primary side BUCK-BOOST make equivalent resistance meet the maximum condition of efficiency.
3) radio energy transmission system as shown in Figure 2, receiving coil electric current：
When system effectiveness is optimal, transmitting coil and receiving coil current relationship are as follows：
IfThen
Therefore, as load RLWhen changing with mutual inductance M, as long as transmitting coil meets with receiving coil electric current
Relationship, you can realize system effectiveness it is optimal.At this point, the duty ratio of primary side regulating circuit is：
Embodiment：
It is as shown in table 1 to set mobile wireless electric energy one group of basic parameter of Transmission system.
Table 1
| Parameter | Numerical value |
| DC side input voltage Uin | 100V |
| Inverter switching frequency fs | 85kHz |
| Compensate inductance Lp | 16.6607μH |
| Compensating electric capacity Cp | 210.429nF |
| Primary coil inductance L1 | 100μH |
| Primary coil compensating electric capacity C1 | 42.0681nF |
| Primary coil equivalent series resistance R1 | 0.5Ω |
| Secondary coil inductance L2 | 100μH |
| Secondary coil compensating electric capacity C2 | 35.06nF |
| Secondary coil equivalent series resistance R2 | 0.5Ω |
| Primary side regulating circuit inductance Lin | 100μH |
| Primary side regulating circuit working frequency fin | 100kHz |
| Primary side output filter capacitor Cin | 470μF |
| Secondary side regulating circuit inductance LL | 100μH |
| Secondary side regulating circuit working frequency fL | 100kHz |
| Output filter capacitor CL | 2000μF |
In mobile wireless electric energy Transmission system, constant using output voltage while efficiency optimization closed-loop control plan
Slightly.There are two control variable under this control strategy：The duty ratio d of input side BUCK-BOOST1With outlet side BUCK-BOOST
Duty ratio d2, as M=15 μ H, RL=10 Ω, UrefWhen=45V, for the basic parameter in table 1, it can obtain in this control
Under system strategy, two control variables are respectively when stable state：Duty ratio d1For 0.3423, d2It is 0.506.
Simulation result is as shown in Figure 3 and Figure 4, when realizing system effectiveness highest, former secondary coil electric current approximately equal, simultaneously
Output voltage is constant.
Assuming that loading R due to the operation of electric vehicle at this timeLChanged with mutual inductance M, M=20 μ H, R after variationL=
20 Ω, Uref=45V.Since new mutual inductance value is unknown, load is unknown, and system effectiveness declines.R is either loaded at this timeLVariation is also
It is mutual inductance M variations, detects the electric current of secondary coil while being fed back to primary side adjusting d1Realize system effectiveness highest, while d2
Automatic adjustment maintains output voltage stabilization.Two control variables are respectively when being finally reached new stable state：Duty ratio d1For
0.242、d2It is 0.565.
Simulation result is as shown in Figure 5 and Figure 6, when realizing system effectiveness highest, former secondary coil electric current approximately equal, simultaneously
Output voltage is constant.
Claims (5)
1. a kind of closed loop control method of mobile wireless electric energy Transmission system efficiency optimization, which is characterized in that including following step
Suddenly：
Step 1：Mobile wireless electric energy Transmission system is built, the circuit of the system includes sequentially connected DC power supply, primary side
Regulating circuit, high-frequency inverter circuit, primary side compensation circuit, primary coil, secondary coil, secondary side compensation circuit, rectifying and wave-filtering electricity
Road, secondary side regulating circuit and load；
Step 2：Determine the circuit parameter of mobile wireless electric energy Transmission system；
Step 3：Detect output voltage and secondary coil electric current；
Step 4：Obtained circuit parameter is detected in conjunction with step 3, and closed-loop control is carried out to mobile wireless electric energy Transmission system.
2. the closed loop control method of mobile wireless electric energy Transmission system efficiency optimization according to claim 1, feature
It is, in step 1, primary side compensation circuit is compensated using LCC types, and secondary side compensation circuit is compensated using S types；Former pair side regulating circuit
It is all made of BUCK-BOOST circuits；Primary side regulating circuit is provided with impedance matching module, and the impedance matching module is according to detecting
The duty ratio of the secondary coil current control primary side regulating circuit arrived；Secondary side regulating circuit is provided with Isobarically Control module, the perseverance
It presses the controller of control module to acquire output voltage, then by the given carry out PI operations of output voltage and output voltage, then will
Modulated signal after the result restriction amplitude of PI operations as secondary side regulating circuit, and then control the duty of secondary side regulating circuit
Than.
3. the closed loop control method of mobile wireless electric energy Transmission system efficiency optimization according to claim 2, feature
It is, in step 2, circuit parameter includes direct current power source voltage value Uin, high-frequency inverter circuit work angular frequency, primary side compensation electricity
Road CP、C1Capacitance, primary coil LP、L1Inductance value, secondary side capacitance C2Capacitance, secondary coil L2Inductance value and
The series equivalent resistance R of primary coil1Resistance value, secondary coil series equivalent resistance R2Resistance value, load RLResistance value and
Output voltage UL。
4. the closed loop control method of mobile wireless electric energy Transmission system efficiency optimization according to claim 3, feature
It is, high-frequency inverter circuit work angular frequency and the resonance angular frequency of primary side compensation circuit and secondary side compensation circuit are equal.
5. the closed loop control method of mobile wireless electric energy Transmission system efficiency optimization according to claim 4, feature
It is, in step 4, realizes that relationship when system effectiveness is optimal between primary side duty ratio and secondary coil electric current is as follows：
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586419A (en) * | 2018-12-12 | 2019-04-05 | 西南交通大学 | A kind of dynamic radio electric energy Transmission system optimized power allocation method and system |
| CN109895640A (en) * | 2019-02-26 | 2019-06-18 | 西安理工大学 | A kind of electric car wireless charging two stage control system and control method |
| CN109941127A (en) * | 2019-03-25 | 2019-06-28 | 湖南工业大学 | A kind of mutual inductance optimization method of electric car dynamic radio charging system topological structure |
| CN110112841A (en) * | 2019-05-28 | 2019-08-09 | 中国电力科学研究院有限公司 | A kind of load of wireless charging system and mutual inductance parameter identification method and system |
| CN110176810A (en) * | 2019-05-22 | 2019-08-27 | 国网江苏省电力有限公司电力科学研究院 | A kind of online mutual inductance identification device of radio energy transmission system and recognition methods |
| CN110912282A (en) * | 2019-12-02 | 2020-03-24 | 中国科学院电工研究所 | Wireless power transmission system and optimization method thereof |
| CN111106676A (en) * | 2020-01-08 | 2020-05-05 | 国网河北省电力有限公司雄安新区供电公司 | Magnetic coupling mechanism parameter multi-objective optimization method of LCC-S type MC-WPT system |
| CN111555612A (en) * | 2020-06-01 | 2020-08-18 | 重庆大学 | Magnetic coupling resonant wireless energy transfer maximum efficiency tracking method based on constant output voltage |
| CN112910046A (en) * | 2021-03-05 | 2021-06-04 | 中国电力科学研究院有限公司 | Mobile wireless charging control method and device and wireless charging system |
| CN113162254A (en) * | 2021-04-16 | 2021-07-23 | 中国矿业大学 | Multi-stage pulse switching voltage stabilizing circuit and voltage stabilizing method |
| CN113315250A (en) * | 2021-05-31 | 2021-08-27 | 哈工大（张家口）工业技术研究院 | Secondary side current indirect closed-loop control method of LCC-S type wireless power transmission system |
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Cited By (16)
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| CN109586419B (en) * | 2018-12-12 | 2021-02-02 | 西南交通大学 | Power optimization distribution method and system for dynamic wireless power transmission system |
| CN109586419A (en) * | 2018-12-12 | 2019-04-05 | 西南交通大学 | A kind of dynamic radio electric energy Transmission system optimized power allocation method and system |
| CN109895640A (en) * | 2019-02-26 | 2019-06-18 | 西安理工大学 | A kind of electric car wireless charging two stage control system and control method |
| CN109895640B (en) * | 2019-02-26 | 2021-12-17 | 西安理工大学 | Two-stage control system and control method for wireless charging of electric automobile |
| CN109941127A (en) * | 2019-03-25 | 2019-06-28 | 湖南工业大学 | A kind of mutual inductance optimization method of electric car dynamic radio charging system topological structure |
| CN110176810A (en) * | 2019-05-22 | 2019-08-27 | 国网江苏省电力有限公司电力科学研究院 | A kind of online mutual inductance identification device of radio energy transmission system and recognition methods |
| CN110176810B (en) * | 2019-05-22 | 2022-09-06 | 国网江苏省电力有限公司电力科学研究院 | Online mutual inductance identification device and method for wireless power transmission system |
| CN110112841A (en) * | 2019-05-28 | 2019-08-09 | 中国电力科学研究院有限公司 | A kind of load of wireless charging system and mutual inductance parameter identification method and system |
| CN110912282A (en) * | 2019-12-02 | 2020-03-24 | 中国科学院电工研究所 | Wireless power transmission system and optimization method thereof |
| CN110912282B (en) * | 2019-12-02 | 2021-03-16 | 中国科学院电工研究所 | Wireless power transmission system and optimization method thereof |
| CN111106676A (en) * | 2020-01-08 | 2020-05-05 | 国网河北省电力有限公司雄安新区供电公司 | Magnetic coupling mechanism parameter multi-objective optimization method of LCC-S type MC-WPT system |
| CN111106676B (en) * | 2020-01-08 | 2021-05-07 | 国网河北省电力有限公司雄安新区供电公司 | Magnetic coupling mechanism parameter multi-objective optimization method of LCC-S type MC-WPT system |
| CN111555612A (en) * | 2020-06-01 | 2020-08-18 | 重庆大学 | Magnetic coupling resonant wireless energy transfer maximum efficiency tracking method based on constant output voltage |
| CN112910046A (en) * | 2021-03-05 | 2021-06-04 | 中国电力科学研究院有限公司 | Mobile wireless charging control method and device and wireless charging system |
| CN113162254A (en) * | 2021-04-16 | 2021-07-23 | 中国矿业大学 | Multi-stage pulse switching voltage stabilizing circuit and voltage stabilizing method |
| CN113315250A (en) * | 2021-05-31 | 2021-08-27 | 哈工大（张家口）工业技术研究院 | Secondary side current indirect closed-loop control method of LCC-S type wireless power transmission system |
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