CN104795903A - Magnetic coupling dual-mode wireless power transmission device and control method thereof - Google Patents
Magnetic coupling dual-mode wireless power transmission device and control method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of wireless power transmission, and particularly relates to a magnetic coupling dual-mode wireless power transmission device and a control method thereof. By the magnetic coupling dual-mode wireless power transmission device, wireless power transmission efficiency can be improved, and power loss is small. The magnetic coupling dual-mode wireless power transmission device comprises a transmitting end and a receiving end and is structurally characterized in that the transmitting end comprises a primary induction coil, a primary resonance coil, a primary resonance capacitor, a primary switch, a high-frequency inversion circuit, an IGBT driving circuit, a switch power source, an external power source interface, a transmitting end control unit, a primary induction coil voltage sampling module, an ADC conversion circuit A and a Wi-Fi module A, and a power input port of a switch power source is connected with the external power source interface while a power output port of the same is connected with a power input port of the high-frequency inversion circuit.
Description
Technical field
The invention belongs to wireless power transmission technical field, particularly relate to a kind of magnetic coupling dual-mode wireless electric energy transmitting device and regulate and control method thereof.
Background technology
Along with the development of wireless power transmission technology, wireless electric energy transmission device is used widely.
For anury household electrical appliances, electric automobile, wireless charging mobile device provide wireless power supply many employings magnetic coupling induction type wireless power transmission technology of electric energy to carry out delivery of electrical energy, though replace wired delivery of electrical energy to a certain extent, realize wireless power, but because its transmission range is short, transmission power loss is large, efficiency of transmission is low, and electric energy receiving system must with the shortcoming such as electric energy transmission device aligns, be difficult to obtain large-scale application.
From 2006, Marin professor Soljacic of the Massachusetts Institute of Technology utilizes magnet coupled resonant type wireless electric energy transmission technology, the bulb of 60W is lighted in success outside 2.1m, achieves electric energy middle distance wireless transmission, breaches the bottleneck of restriction wireless power transmission technical development.
Theory analysis proves with experiment, and based on the wireless electric energy transmission device of magnet coupled resonant type wireless electric energy transmission technology, its delivery of electrical energy efficiency not reduces with transmitting terminal coil and receiving terminal coil distance and increases.
(1), when wireless power transmission distance equals resonance critical transmission range, magnet coupled resonant type wireless power transfer has most high-transmission efficiency.
(2), when wireless power transmission distance is less than resonance critical transmission range, magnet coupled resonant type wireless power transfer efficiency of transmission reduces with transmission range and reduces.
(3), when wireless power transmission distance is greater than resonance critical transmission range, magnet coupled resonant type wireless power transfer efficiency of transmission reduces with transmission range and increases.
For the above-mentioned defect of current magnetic coupling induction type and magnet coupled resonant type two kinds of wireless power transmission technology, the present invention proposes magnetic coupling dual-mode wireless electric energy transmission technology.
(1), when wireless power transmission distance is greater than bimodulus critical transmission range, magnetic coupling dual-mode wireless electric energy transmitting device is adjusted to magnet coupled resonant type wireless delivery of electrical energy pattern.
(2), when wireless power transmission distance is less than bimodulus critical transmission range, magnetic coupling dual-mode wireless electric energy transmitting device is adjusted to magnetic coupling induction type wireless power transmission pattern.
Based on magnetic coupling dual-mode wireless electric energy transmission technology, bond networking technology, leak control and check technology, magnetic coupling dual-mode wireless electric energy transmitting device and regulate and control method thereof are proposed, its device has that efficiency of transmission is high, through-put power is large, can communication, intellectuality, low energy consumption, waterproof and dustproof, protection against electric shock, without electric arc, exempt to clear up, fail safe is high, be convenient to the advantages such as maintenance, it is low that its regulate and control method solves current wireless electric energy transmission device efficiency of transmission, resonance frequency shift, the problems such as waste of energy.
Summary of the invention
The present invention is exactly for the problems referred to above, provides a kind of and improves the little magnetic coupling dual-mode wireless electric energy transmitting device of electric energy wireless transmission efficiency, electric energy loss and regulate and control method thereof.
For achieving the above object, the present invention adopts following technical scheme, magnetic coupling dual-mode wireless electric energy transmitting device of the present invention comprises transmitting terminal and receiving terminal, its structural feature transmitting terminal comprises primary induction coil, primary resonant coil, primary resonant electric capacity, primary switch, high-frequency inverter circuit, IGBT drive circuit, Switching Power Supply, external power source interface, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A, the power input of Switching Power Supply is connected with external power source interface, the electric energy output end mouth of Switching Power Supply is connected with the power input of high-frequency inverter circuit, the control signal input port of Switching Power Supply is connected with the control signal output port of transmitting terminal control unit, the electric energy output end mouth of high-frequency inverter circuit is connected with primary induction coil, the driving signal input mouth of high-frequency inverter circuit is connected with the output port of IGBT drive circuit, the input port of IGBT drive circuit is connected with the drive control signal output port of transmitting terminal control unit, and primary induction coil voltage sample module is connected with the signal input port of transmitting terminal control unit by ADC change-over circuit A, the signal transmission port of Wi-Fi module A is connected with the signal transmission port of transmitting terminal control unit, primary resonant coil, primary resonant electric capacity, primary switch are composed in series loop.
Described receiving terminal comprises secondary induction coil, secondary resonance coil, secondary resonance electric capacity, secondary switch, current rectifying and wave filtering circuit, voltage stabilizing circuit, step-up/step-down circuit, power output interface, receiving terminal control unit, ADC change-over circuit B, ADC change-over circuit C, secondary induction coil electric current and voltage sampling module, output voltage current sample module, electronic switch, Wi-Fi module B, secondary induction coil is connected with electronic switch input, electronic switch output is connected with the input of current rectifying and wave filtering circuit, the output of current rectifying and wave filtering circuit respectively with the input of voltage stabilizing circuit, the input of step-up/step-down circuit is connected, the output of step-up/step-down circuit is connected with power output interface, the secondary induction coil electric current and voltage sampled signal input port of receiving terminal control unit is connected with the output port of secondary induction coil electric current and voltage sampling module by ADC change-over circuit B, the electronic switch control signal output port of receiving terminal control unit is connected with the switch controlling signal input port of electronic switch, the power end of receiving terminal control unit is connected with the output of voltage stabilizing circuit, the output voltage current sampling signal input port of receiving terminal control unit is successively by ADC change-over circuit C, output voltage current sample module is connected with the electric current and voltage sampled signal output port of step-up/step-down circuit, the signal transmission port of receiving terminal control unit is connected with the signal transmission port of Wi-Fi module B, secondary resonance coil, secondary resonance electric capacity, secondary switch are composed in series loop.
As a kind of preferred version, transmitting terminal of the present invention also comprises power carrier communication module, and the signal transmission port of power carrier communication module is connected with transmitting terminal control unit signal transmission port.
As another kind of preferred version, the natural resonance frequency of primary resonant coil of the present invention and secondary resonance coil is 100kHz ~ 200kHz.
In addition, transmitting terminal control unit of the present invention and receiving terminal control unit all adopt DSPIC microcontroller; Described voltage stabilizing circuit adopts+5V voltage stabilizing circuit; Described transmitting terminal is arranged in the casing A of sealing, insulation, and receiving terminal is arranged in the casing B of sealing, insulation.
Magnetic coupling dual-mode wireless electric energy transmission regulate and control method of the present invention comprises the following steps.
1) in magnet coupled resonant type wireless delivery of electrical energy pattern, primary switch S1, secondary switch S2 are closed, be in Low-power-consumptiodormancy dormancy state, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A, IGBT drive circuit, the discontinuous work of high-frequency inverter circuit, transmitting terminal control unit sends sounds out pulse through IGBT drive circuit, high-frequency inverter circuit, act on just induction coil, primary induction coil and primary resonant coil mutual inductance, primary resonant coil induced current; By primary induction coil voltage sample module, sampling primary induction coil voltage magnitude, by ADC change-over circuit A, feeds back to transmitting terminal control unit and catches secondary resonance coil resonance frequency and make the judgement whether having secondary resonance coil close.
2) transmitting terminal control unit is according to the resonant frequency value captured, frequency of utilization is tabled look-up fuzzy control, find corresponding wireless power transmission distance, judge the couple state between primary resonant coil and secondary resonance coil, if be in overcoupling state, then be switched to magnetic coupling induction type wireless power transmission pattern, namely disconnect S1, S2, if be in Critical Coupling or undercoupling state, maintain magnet coupled resonant type wireless delivery of electrical energy pattern constant.
3) after the electric energy of primary induction coil is indirectly coupled to secondary induction coil, receiving terminal control unit is sent to Wi-Fi module A by Wi-Fi module B by successfully receiving energy information, transmitting terminal control unit judges near the load-side of object really as mating according to this information, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A are placed in operating state, and transmitting terminal control unit output pwm signal frequency is fm; If in certain hour transmitting terminal control unit do not receive receiving terminal control unit send information; judge close to object for can not mate object or other disturb, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A are placed in Low-power-consumptiodormancy dormancy state.
4) when receiving terminal control unit is started working, when power consumption equipment is connected to power output interface, receiving terminal control unit connects client by Wi-Fi module B, client arranges rated power, rated voltage, the rated current parameters of connect power consumption equipment, or sets rated power, rated voltage, the rated current parameters of the special power consumption equipment of this magnetic coupling dual-mode wireless electric energy transmitting device receiving terminal when dispatching from the factory; Receiving terminal control unit judges according to rated power rated voltage, the magnitude of voltage that step-up/step-down circuit should export, adjustment receiving terminal control unit exports PWM duty when frequency, controls the output voltage of step-up/step-down circuit, makes step-up/step-down circuit export the magnitude of voltage meeting electrical appliance work.
5) output voltage of output voltage current sample module real-time sampling step-up/step-down circuit and electric current, by ADC change-over circuit C, feed back to receiving terminal control unit, and regulate PWM to export, to correct output voltage, output current meets rated value.
6) secondary induction coil current-voltage sampling module, sampling secondary induction coil electric current and voltage value, through ADC change-over circuit B, feed back to receiving terminal control unit, secondary induction coil output voltage values and step-up/step-down circuit output voltage values are sent to transmitting terminal control unit by Wi-Fi module B by receiving terminal control unit.
If secondary induction coil voltage is higher than step-up/step-down circuit output voltage values more than 0.5V, then transmitting terminal control unit reduces PWM 1% duty ratio, carries out correction reduce primary induction coil, secondary induction coil both sides magnitude of voltage to the output of high-frequency inverter circuit.
If secondary induction coil output voltage values is lower than step-up/step-down circuit output voltage values, then transmitting terminal control unit increases PWM 1% duty ratio, correction is carried out to the output of high-frequency inverter circuit and increases primary induction coil, secondary induction coil output voltage values, reduce step-up/step-down circuit adjusting range.
If transmitting terminal control unit do not adjust export PWM duty when frequency time, secondary induction coil output voltage values declines automatically, or after adjustment PWM frequency during secondary induction coil output voltage values generation degradation, then be considered as resonance frequency shift, receiving terminal moves, and again catches secondary resonance coil resonance frequency at 100kHz ~ 300kHz.
As a kind of preferred version, step 1) transmitting terminal control unit of the present invention sends one by every 1s and continues the exploration pulse of 0.1s through IGBT drive circuit, high-frequency inverter circuit, acts on just induction coil; Described step 3) certain hour is 10ms.
As another kind of preferred version, the judgment mode of step 1) of the present invention is: when the continuous 3s of transmitting terminal control unit detects the change of sampling primary induction coil voltage magnitude more than 3V, transmitting terminal control system is placed in pre-operation state by transmitting terminal control unit, transmitting terminal control unit, IGBT drive circuit, high-frequency inverter circuit continuous operation 10ms; Make transmitting terminal control unit increase the pwm signal of 10kHz exporting continuously every 0.1ms from 100kHz in 1ms, transmitting terminal control unit by primary induction coil voltage magnitude in this 1ms of sampling, select magnitude of voltage maximum time respective frequencies f1; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies f2; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies fm; In 5ms, capture the resonance frequency of secondary resonance coil, be accurate to 0.1kHz.
As another kind of preferred version, step 5) sampling and outputting voltage method of the present invention is wire access step-up/step-down circuit output point, sampled output current method is that series connection 0.1 ohm of sampling resistor enters step-up/step-down circuit output branch road, 0.1 ohm of sampling resistor both end voltage value of sampling.
Secondly, the method that step 6) of the present invention catches the employing of secondary resonance coil resonance frequency again at 100kHz ~ 300kHz is: transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 10kHz from 100kHz continuous in 1.5ms, receiving terminal control unit is by secondary induction coil voltage magnitude in this 1.5ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, transmitting terminal control unit select magnitude of voltage maximum time respective frequencies f1; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 afterwards in 1ms continuously and reduce the pwm signal of 1kHz, receiving terminal control unit is by primary resonant coil voltage amplitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies f2; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, receiving terminal control unit is by secondary induction coil voltage magnitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies fm.
In addition, the present invention also comprises step 7) transmitting terminal control unit and system health information is sent to power carrier communication module, power carrier communication module is modulated signal, by wire transfer information, by the information that other devices of power carrier communication module demodulation transmit, and being stored in transmitting terminal control unit, the memory cycle is 5 minutes, empties a secondary data every 5 minutes; If it is operating state, pre-operation state, Low-power-consumptiodormancy dormancy state that client shows a certain magnetic coupling dual-mode wireless electric energy transmitting device transmitting terminal control unit state; then magnetic coupling dual-mode wireless electric energy transmitting device is working properly; if output abnormality or no-output, then need to carry out Inspection and maintenance to corresponding magnetic coupling dual-mode wireless electric energy transmitting device.
Beneficial effect of the present invention.
Transmitting terminal control system of the present invention and receiving terminal control system are carried out wireless telecommunications and can be regulated secondary resonance coil resonance frequency-tracking, changeable wireless power transmission pattern, regulate operating state to reduce power consumption, have the advantage of energy-conserving and environment-protective according to using state; Secondary resonance coil resonance frequency-tracking is regulated, improves electric energy wireless transmission efficiency.
Transmitting terminal control system of the present invention has Low-power-consumptiodormancy dormancy state, pre-operation state, operating state, and can switch according to using state, saves energy.
The present invention connects client by described Wi-Fi module B, client arranges the rated power of connect power consumption equipment, rated voltage, rated current, the magnitude of voltage that step-up/step-down circuit described in receiving terminal control unit judges according to rated power rated voltage should export, the voltage of the step-up/step-down circuit circuit described in control exports, by Wi-Fi module B, send the magnitude of voltage that receiving terminal control system is sampled to described transmitting terminal control system, the information that described transmitting terminal control unit receives exports the PWM of suitable duty ratio, regulate the output of inverter circuit, reduce electric energy loss.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.Scope is not only confined to the statement of following content.
Fig. 1 is magnetic coupling dual-mode wireless electric energy transmitting device coil equivalent structure topological diagram of the present invention.
Fig. 2 is the structured flowchart of magnetic coupling dual-mode wireless electric energy transmitting device of the present invention.
Embodiment
As shown in the figure, magnetic coupling dual-mode wireless electric energy transmitting device of the present invention comprises transmitting terminal and receiving terminal, its structural feature transmitting terminal comprises primary induction coil, primary resonant coil, primary resonant electric capacity, primary switch, high-frequency inverter circuit, IGBT drive circuit, Switching Power Supply, external power source interface, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A, the power input of Switching Power Supply is connected with external power source interface, the electric energy output end mouth of Switching Power Supply is connected with the power input of high-frequency inverter circuit, the control signal input port of Switching Power Supply is connected with the control signal output port of transmitting terminal control unit, the electric energy output end mouth of high-frequency inverter circuit is connected with primary induction coil, the driving signal input mouth of high-frequency inverter circuit is connected with the output port of IGBT drive circuit, the input port of IGBT drive circuit is connected with the drive control signal output port of transmitting terminal control unit, and primary induction coil voltage sample module is connected with the signal input port of transmitting terminal control unit by ADC change-over circuit A, the signal transmission port of Wi-Fi module A is connected with the signal transmission port of transmitting terminal control unit, primary resonant coil, primary resonant electric capacity, primary switch are composed in series loop.
Described receiving terminal comprises secondary induction coil, secondary resonance coil, secondary resonance electric capacity, secondary switch, current rectifying and wave filtering circuit, voltage stabilizing circuit, step-up/step-down circuit, power output interface, receiving terminal control unit, ADC change-over circuit B, ADC change-over circuit C, secondary induction coil electric current and voltage sampling module, output voltage current sample module, electronic switch, Wi-Fi module B, secondary induction coil is connected with electronic switch input, electronic switch output is connected with the input of current rectifying and wave filtering circuit, the output of current rectifying and wave filtering circuit respectively with the input of voltage stabilizing circuit, the input of step-up/step-down circuit is connected, the output of step-up/step-down circuit is connected with power output interface, the secondary induction coil electric current and voltage sampled signal input port of receiving terminal control unit is connected with the output port of secondary induction coil electric current and voltage sampling module by ADC change-over circuit B, the electronic switch control signal output port of receiving terminal control unit is connected with the switch controlling signal input port of electronic switch, the power end of receiving terminal control unit is connected with the output of voltage stabilizing circuit, the output voltage current sampling signal input port of receiving terminal control unit is successively by ADC change-over circuit C, output voltage current sample module is connected with the electric current and voltage sampled signal output port of step-up/step-down circuit, the signal transmission port of receiving terminal control unit is connected with the signal transmission port of Wi-Fi module B, secondary resonance coil, secondary resonance electric capacity, secondary switch are composed in series loop.
Described Switching Power Supply adopts+the 15V ,-15V power supply exporting and be applicable to described IGBT drive circuit, is applicable to+5V the power supply of described transmitting terminal control unit work, and meets the voltage of high-frequency inversion requirement.
Step-up/step-down circuit exports electric energy to power consumption equipment, and utilize receiving terminal control unit to control the Enable Pin EN of buck chip in step-up/step-down circuit, EN is that high level is enable, utilize receiving terminal control unit to control step-up/step-down circuit and whether outwards export electric energy, and ensure that the primary induction coil voltage magnitude that transmitting terminal control system samples when selecting operating state is not subject to load effect.
It is open-minded that described electronic switch control law can be set to input " 0 ", and input " 1 " turns off.
Described transmitting terminal also comprises power carrier communication module, and the signal transmission port of power carrier communication module is connected with transmitting terminal control unit signal transmission port.Can make between magnetic coupling dual-mode wireless electric energy transmitting device by power carrier communication module, magnetic coupling dual-mode wireless electric energy transmitting device and Internet, interconnect between magnetic coupling dual-mode wireless electric energy transmitting device and client, attendant is by client testing fixture operating state; Utilize PLC technology network signal to be introduced magnetic coupling dual-mode wireless electric energy transmitting device, through ICP/IP protocol, by magnetic coupling dual-mode wireless electric energy transmitting device towards periphery equipment Wi-Fi Hotspot is provided; And primary induction coil voltage, current sample result and secondary induction coil voltage, current sample result are transmitted mutually by power carrier.
The natural resonance frequency of described primary resonant coil and secondary resonance coil is 100kHz ~ 200kHz.
Described transmitting terminal control unit and receiving terminal control unit all adopt DSPIC microcontroller; Described voltage stabilizing circuit adopts+5V voltage stabilizing circuit; Described transmitting terminal is arranged in the casing A of sealing, insulation, and receiving terminal is arranged in the casing B of sealing, insulation.The casing of sealing, insulation can not cause electric shock accidents because of touching, waterproof and dustproof.
In casing A, transmitting terminal control system (transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, power carrier communication module, Wi-Fi module A), can add barricade between primary induction coil, Switching Power Supply, shielding primary induction coil is to the electromagnetic interference of transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, power carrier communication module, Wi-Fi module A.Transmitting terminal control unit, high-frequency inverter circuit, IGBT drive circuit can be fixed on the shield plates, therebetween alternating floor electro-insulating rubber skin.
Casing B can draw power output interface, powers to power consumption equipment.Can add barricade between secondary resonance coil, current rectifying and wave filtering circuit, described receiving terminal control system (receiving terminal control unit, ADC change-over circuit B, ADC change-over circuit C, secondary induction coil electric current and voltage sampling module, output voltage current sample module, electronic switch, Wi-Fi module B), shielding secondary induction coil is to the electromagnetic interference of receiving terminal control system.Receiving terminal control unit, current rectifying and wave filtering circuit can be fixed on described barricade, therebetween alternating floor electro-insulating rubber skin.
Barricade can be Ferrite Material, has good shielding electromagnetic field of high frequency performance.
Described casing A, described casing B material can be ABS, and ABS electrical insulating property, resistance to height are hot, good flame resistance.
In Fig. 1, A is primary induction coil, and B is primary resonant coil, and C is secondary resonance coil, and D is secondary induction coil.Primary resonant coils connected in series switch S 1, secondary resonance coils connected in series switch S 2, when S1, S2 close, magnetic coupling dual-mode wireless electric energy transmitting device works in magnet coupled resonant type wireless delivery of electrical energy pattern, when S1, S2 disconnect, magnetic coupling dual-mode wireless electric energy transmitting device works in magnetic coupling induction type wireless power transmission pattern.When wireless power transmission distance, namely when the spacing of primary resonant coil and secondary resonance coil is less than bimodulus critical transmission range, the delivery of electrical energy efficiency that magnetic coupling dual-mode wireless electric energy transmitting device carries out wireless power transmission with magnet coupled resonant type wireless delivery of electrical energy pattern is greater than magnetic coupling induction type wireless power transmission pattern, therefore magnetic coupling dual-mode wireless electric energy transmitting device is adjusted to magnet coupled resonant type wireless delivery of electrical energy pattern; When wireless power transmission distance is greater than the critical transmission range of bimodulus, the delivery of electrical energy efficiency that magnetic coupling dual-mode wireless electric energy transmitting device carries out wireless power transmission with magnet coupled resonant type wireless delivery of electrical energy pattern is less than magnetic coupling induction type wireless power transmission pattern, and magnetic coupling dual-mode wireless electric energy transmitting device is adjusted to magnetic coupling induction type wireless power transmission pattern.Frequency is utilized to table look-up fuzzy control, wireless power transmission distance is determined according to the secondary resonance coil resonance frequency f m that transmitting terminal control system captures, to judge the relation of the critical transmission range of wireless power transmission distance and bimodulus, determine magnetic coupling induction type wireless electric energy transmission device mode of operation.
Below magnetic coupling dual-mode wireless electric energy transmission transmitting device physical structure is described.
The transmitting terminal of magnetic coupling dual-mode wireless electric energy transmitting device is sealed in casing A, casing A can be installed in metope, floor, desk, especially be applicable to outdoor or large-scale public field, its waterproof and dustproof characteristic ensures that it normally uses under inclement weather conditions out of doors.Receiving terminal is sealed in casing B, and receiving terminal can be connected on power consumption equipment outside, is powered to power consumption equipment by power output interface, also can be embedded in power consumption equipment inside.
The access of external power source interface 220V, 50Hz mains supply, exports+the 15V ,-15V that are applicable to IGBT drive circuit, for+5V the power supply of transmitting terminal control unit work through Switching Power Supply.And meet the voltage of high-frequency inverter circuit demand.
The couple electrical energy of primary induction coil is to primary resonant coil, the couple electrical energy of primary resonant coil is to secondary resonance coil, the couple electrical energy of secondary resonance coil is after secondary induction coil, through current rectifying and wave filtering circuit, step-up/step-down circuit, export power consumption equipment required voltage, output to power consumption equipment by power output interface.
Below in conjunction with Fig. 2, the operating state of magnetic coupling dual-mode wireless electric energy transmission transmitting device and adjustment method are described.
Under initial condition, magnetic coupling dual-mode wireless electric energy transmitting device is operated in magnet coupled resonant type wireless delivery of electrical energy pattern, namely S1, S2 are closed, and be in Low-power-consumptiodormancy dormancy state, transmitting terminal control system, IGBT drive circuit, high-frequency inverter circuit discontinuous work when being in Low-power-consumptiodormancy dormancy state, namely transmitting terminal control unit sends the exploration pulse of a lasting 0.1s through IGBT drive circuit, high-frequency inverter circuit by the every 1s of DSPIC, act on just induction coil, under primary induction coil and the effect of primary resonant coil mutual inductance, primary resonant coil induced current; Because the distance of primary resonant coil and primary induction coil, secondary resonance coil are equal with the distance of secondary induction coil and constant all the time, therefore mutual inductance is constant between primary induction coil and primary resonant coil, between secondary level induction coil and secondary level resonance coil, now the voltage magnitude of primary induction coil main and between primary resonant coil with secondary resonance coil coupling coefficient relevant, namely with wireless power transmission distance dependent; By primary induction coil voltage sample module, sampling primary induction coil voltage magnitude, by ADC change-over circuit A, feeds back to transmitting terminal control unit and catches secondary resonance coil resonance frequency and make the judgement whether having secondary resonance coil close.
Concrete judgment mode is: when the continuous 3s of transmitting terminal control unit detects sampling primary induction coil voltage magnitude generation acute variation, transmitting terminal control system is placed in pre-operation state by transmitting terminal control unit, i.e. transmitting terminal control unit, IGBT drive circuit, high-frequency inverter circuit continuous operation 10ms.Because secondary resonance coil natural resonance frequency is 100kHz ~ 200kHz, therefore make transmitting terminal control unit at the pwm signal exporting every 0.1ms increase 10kHz from 100kHz in 1ms continuously, transmitting terminal control unit by sampling this 1ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies f1; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies f2; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies fm.Transmitting terminal control unit like this can capture the resonance frequency of secondary resonance coil in 5ms, is accurate to 0.1kHz.
Transmitting terminal control unit is according to the resonant frequency value captured, frequency of utilization is tabled look-up fuzzy control, find corresponding wireless power transmission distance, judge the couple state between primary resonant coil and secondary resonance coil, if be in overcoupling state, then be switched to magnetic coupling induction type wireless power transmission pattern, namely disconnect S1, S2, if be in Critical Coupling or undercoupling state, maintain magnet coupled resonant type wireless delivery of electrical energy pattern constant.
After the electric energy of primary induction coil is indirectly coupled to secondary induction coil, receiving terminal control system is started working, Wi-Fi module A is sent to by Wi-Fi module B by successfully receiving energy information by receiving terminal control unit, transmitting terminal control unit judges near the load-side of object really as mating according to this information, transmitting terminal control system is placed in operating state, time in running order, transmitting terminal control unit output pwm signal frequency is fm.If in 10ms transmitting terminal control unit do not receive receiving terminal control unit send information; judge close to object for can not mate object or other disturb, transmitting terminal control system is placed in Low-power-consumptiodormancy dormancy state.
When receiving terminal control unit is started working, when power consumption equipment is connected to power output interface, receiving terminal control unit connects client by Wi-Fi module B, client arranges the parameter such as rated power, rated voltage, rated current of connect power consumption equipment, or sets the parameter such as rated power, rated voltage, rated current of the special power consumption equipment of this magnetic coupling dual-mode wireless electric energy transmitting device receiving terminal when dispatching from the factory.Receiving terminal control unit judges according to rated power rated voltage, the magnitude of voltage that step-up/step-down circuit should export, adjustment receiving terminal control unit exports PWM duty when frequency, controls the output voltage of step-up/step-down circuit, makes step-up/step-down circuit export the magnitude of voltage meeting electrical appliance work.
The output voltage of output voltage current sample module real-time sampling step-up/step-down circuit and electric current, sampling and outputting voltage method is wire access step-up/step-down circuit output point, sampled output current method is that series connection 0.1 ohm of sampling resistor enters step-up/step-down circuit output branch road, to sample 0.1 ohm of sampling resistor both end voltage value, by ADC change-over circuit C, feed back to receiving terminal control unit, regulate PWM to export by single-chip microcomputer, to correct output voltage, output current meets rated value.
Secondary induction coil current-voltage sampling module, sampling secondary induction coil electric current and voltage value, through ADC change-over circuit B, feed back to receiving terminal control unit, receiving terminal control unit, by secondary induction coil output voltage values and step-up/step-down circuit output voltage values, is sent to transmitting terminal control system by Wi-Fi module B.
If secondary induction coil voltage is too much higher than step-up/step-down circuit output voltage values, then transmitting terminal control unit shades PWM duty ratio, correction is carried out to the output of high-frequency inverter circuit and reduces primary induction coil, secondary induction coil both sides magnitude of voltage, avoid waste of energy on step-up/step-down circuit, improve utilization rate of electrical.
If secondary induction coil output voltage values is lower than step-up/step-down circuit output voltage values, then transmitting terminal control unit micro-increasing PWM duty ratio, correction is carried out to the output of high-frequency inverter circuit and increases primary induction coil, secondary induction coil output voltage values, reduce step-up/step-down circuit adjusting range.
If transmitting terminal control unit do not adjust export PWM duty when frequency time, secondary induction coil output voltage values declines automatically, or after adjustment PWM frequency during secondary induction coil output voltage values generation degradation, then be considered as resonance frequency shift, may cause due to the movement of receiving terminal, adopt following measures again to catch secondary resonance coil resonance frequency at 100kHz ~ 300kHz.
Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 10kHz from 100kHz continuous in 1.5ms, receiving terminal control unit is by secondary induction coil voltage magnitude in this 1.5ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, transmitting terminal control unit select magnitude of voltage maximum time respective frequencies f1; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 afterwards in 1ms continuously and reduce the pwm signal of 1kHz, receiving terminal control unit is by primary resonant coil voltage amplitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies f2; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, receiving terminal control unit is by secondary induction coil voltage magnitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies fm.Utilize the method real-time tracking secondary resonance coil resonance frequency, improve wireless power transmission efficiency.
Transmitting terminal control unit is according to the resonant frequency value captured, frequency of utilization is tabled look-up fuzzy control, calculate wireless power transmission distance, judge the couple state between primary resonant coil and secondary resonance coil, if be in overcoupling state, then be switched to magnetic coupling induction type wireless power transmission pattern, namely disconnect S1, S2, if be in Critical Coupling or undercoupling state, maintain magnet coupled resonant type wireless delivery of electrical energy pattern constant.
PLC technology is utilized to be introduced by network signal in magnetic coupling dual-mode wireless electric energy transmitting device, by power carrier communication module demodulation network signal, TCP/IP serial converter converts network signal to rs 232 serial interface signal, and rs 232 serial interface signal is provided Wi-Fi Hotspot by Wi-Fi module A by transmitting terminal control unit towards periphery.
The magnetic coupling dual-mode wireless electric energy transmitting device of each embedding power carrier communication module in certain area, utilize transmitting terminal control unit that system health information is sent to power carrier communication module, power carrier communication module is modulated signal, by wire transfer information, the information that magnetic coupling dual-mode wireless electric energy transmitting device is transmitted by other devices of power carrier communication module demodulation, and be stored in transmitting terminal control unit, memory cycle is 5 minutes, a secondary data is emptied every 5 minutes, maintenance personal can obtain the working condition of certain area all magnetic coupling dual-mode wireless electric energy transmitting device from client.If it is operating state, pre-operation state, Low-power-consumptiodormancy dormancy state that client shows a certain magnetic coupling dual-mode wireless electric energy transmitting device transmitting terminal control unit state; then magnetic coupling dual-mode wireless electric energy transmitting device is working properly; if output abnormality or no-output, then the personnel that need repairing carry out Inspection and maintenance to corresponding magnetic coupling dual-mode wireless electric energy transmitting device.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (10)
1.
magnetic coupling dual-mode wireless electric energy transmitting device, comprise transmitting terminal and receiving terminal, it is characterized in that transmitting terminal comprises primary induction coil, primary resonant coil, primary resonant electric capacity, primary switch, high-frequency inverter circuit, IGBT drive circuit, Switching Power Supply, external power source interface, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A, the power input of Switching Power Supply is connected with external power source interface, the electric energy output end mouth of Switching Power Supply is connected with the power input of high-frequency inverter circuit, the control signal input port of Switching Power Supply is connected with the control signal output port of transmitting terminal control unit, the electric energy output end mouth of high-frequency inverter circuit is connected with primary induction coil, the driving signal input mouth of high-frequency inverter circuit is connected with the output port of IGBT drive circuit, the input port of IGBT drive circuit is connected with the drive control signal output port of transmitting terminal control unit, and primary induction coil voltage sample module is connected with the signal input port of transmitting terminal control unit by ADC change-over circuit A, the signal transmission port of Wi-Fi module A is connected with the signal transmission port of transmitting terminal control unit, primary resonant coil, primary resonant electric capacity, primary switch are composed in series loop,
described receiving terminal comprises secondary induction coil, secondary resonance coil, secondary resonance electric capacity, secondary switch, current rectifying and wave filtering circuit, voltage stabilizing circuit, step-up/step-down circuit, power output interface, receiving terminal control unit, ADC change-over circuit B, ADC change-over circuit C, secondary induction coil electric current and voltage sampling module, output voltage current sample module, electronic switch, Wi-Fi module B, secondary induction coil is connected with electronic switch input, electronic switch output is connected with the input of current rectifying and wave filtering circuit, the output of current rectifying and wave filtering circuit respectively with the input of voltage stabilizing circuit, the input of step-up/step-down circuit is connected, the output of step-up/step-down circuit is connected with power output interface, the secondary induction coil electric current and voltage sampled signal input port of receiving terminal control unit is connected with the output port of secondary induction coil electric current and voltage sampling module by ADC change-over circuit B, the electronic switch control signal output port of receiving terminal control unit is connected with the switch controlling signal input port of electronic switch, the power end of receiving terminal control unit is connected with the output of voltage stabilizing circuit, the output voltage current sampling signal input port of receiving terminal control unit is successively by ADC change-over circuit C, output voltage current sample module is connected with the electric current and voltage sampled signal output port of step-up/step-down circuit, the signal transmission port of receiving terminal control unit is connected with the signal transmission port of Wi-Fi module B, secondary resonance coil, secondary resonance electric capacity, secondary switch are composed in series loop.
2.
according to claim 1, magnetic coupling dual-mode wireless electric energy transmitting device, is characterized in that described transmitting terminal also comprises power carrier communication module, and the signal transmission port of power carrier communication module is connected with transmitting terminal control unit signal transmission port.
3.
according to claim 1, magnetic coupling dual-mode wireless electric energy transmitting device, is characterized in that the natural resonance frequency of described primary resonant coil and secondary resonance coil is 100kHz ~ 200kHz.
4.
according to claim 1, magnetic coupling dual-mode wireless electric energy transmitting device, is characterized in that described transmitting terminal control unit and receiving terminal control unit all adopt DSPIC microcontroller; Described voltage stabilizing circuit adopts+5V voltage stabilizing circuit; Described transmitting terminal is arranged in the casing A of sealing, insulation, and receiving terminal is arranged in the casing B of sealing, insulation.
5.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method, is characterized in that comprising the following steps:
1) in magnet coupled resonant type wireless delivery of electrical energy pattern, primary switch S1, secondary switch S2 are closed, be in Low-power-consumptiodormancy dormancy state, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A, IGBT drive circuit, the discontinuous work of high-frequency inverter circuit, transmitting terminal control unit sends sounds out pulse through IGBT drive circuit, high-frequency inverter circuit, act on just induction coil, primary induction coil and primary resonant coil mutual inductance, primary resonant coil induced current; By primary induction coil voltage sample module, sampling primary induction coil voltage magnitude, by ADC change-over circuit A, feeds back to transmitting terminal control unit and catches secondary resonance coil resonance frequency and make the judgement whether having secondary resonance coil close;
2) transmitting terminal control unit is according to the resonant frequency value captured, frequency of utilization is tabled look-up fuzzy control, find corresponding wireless power transmission distance, judge the couple state between primary resonant coil and secondary resonance coil, if be in overcoupling state, then be switched to magnetic coupling induction type wireless power transmission pattern, namely disconnect S1, S2, if be in Critical Coupling or undercoupling state, maintain magnet coupled resonant type wireless delivery of electrical energy pattern constant;
3) after the electric energy of primary induction coil is indirectly coupled to secondary induction coil, receiving terminal control unit is sent to Wi-Fi module A by Wi-Fi module B by successfully receiving energy information, transmitting terminal control unit judges near the load-side of object really as mating according to this information, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A are placed in operating state, and transmitting terminal control unit output pwm signal frequency is fm; If in certain hour transmitting terminal control unit do not receive receiving terminal control unit send information; judge close to object for can not mate object or other disturb, transmitting terminal control unit, primary induction coil voltage sample module, ADC change-over circuit A, Wi-Fi module A are placed in Low-power-consumptiodormancy dormancy state;
4) when receiving terminal control unit is started working, when power consumption equipment is connected to power output interface, receiving terminal control unit connects client by Wi-Fi module B, client arranges rated power, rated voltage, the rated current parameters of connect power consumption equipment, or sets rated power, rated voltage, the rated current parameters of the special power consumption equipment of this magnetic coupling dual-mode wireless electric energy transmitting device receiving terminal when dispatching from the factory; Receiving terminal control unit judges according to rated power rated voltage, the magnitude of voltage that step-up/step-down circuit should export, adjustment receiving terminal control unit exports PWM duty when frequency, controls the output voltage of step-up/step-down circuit, makes step-up/step-down circuit export the magnitude of voltage meeting electrical appliance work;
5) output voltage of output voltage current sample module real-time sampling step-up/step-down circuit and electric current, by ADC change-over circuit C, feed back to receiving terminal control unit, and regulate PWM to export, to correct output voltage, output current meets rated value;
6) secondary induction coil current-voltage sampling module, sampling secondary induction coil electric current and voltage value, through ADC change-over circuit B, feed back to receiving terminal control unit, secondary induction coil output voltage values and step-up/step-down circuit output voltage values are sent to transmitting terminal control unit by Wi-Fi module B by receiving terminal control unit;
if secondary induction coil output voltage values is lower than step-up/step-down circuit output voltage values, then transmitting terminal control unit increases PWM 1% duty ratio, correction is carried out to the output of high-frequency inverter circuit and increases primary induction coil, secondary induction coil output voltage values, reduce step-up/step-down circuit adjusting range;
if transmitting terminal control unit do not adjust export PWM duty when frequency time, secondary induction coil output voltage values declines automatically, or after adjustment PWM frequency during secondary induction coil output voltage values generation degradation, then be considered as resonance frequency shift, receiving terminal moves, and again catches secondary resonance coil resonance frequency at 100kHz ~ 300kHz.
6.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method according to claim 5, it is characterized in that described step 1) transmitting terminal control unit sends one by every 1s and continues the exploration pulse of 0.1s through IGBT drive circuit, high-frequency inverter circuit, act on just induction coil; Described step 3) certain hour is 10ms.
7.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method according to claim 5, it is characterized in that the judgment mode of described step 1) is: when the continuous 3s of transmitting terminal control unit detects the change of sampling primary induction coil voltage magnitude more than 3V, transmitting terminal control system is placed in pre-operation state by transmitting terminal control unit, transmitting terminal control unit, IGBT drive circuit, high-frequency inverter circuit continuous operation 10ms; Make transmitting terminal control unit increase the pwm signal of 10kHz exporting continuously every 0.1ms from 100kHz in 1ms, transmitting terminal control unit by primary induction coil voltage magnitude in this 1ms of sampling, select magnitude of voltage maximum time respective frequencies f1; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies f2; Transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, transmitting terminal control unit by sampling this 2ms in primary induction coil voltage magnitude, select magnitude of voltage maximum time respective frequencies fm; In 5ms, capture the resonance frequency of secondary resonance coil, be accurate to 0.1kHz.
8.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method according to claim 5, it is characterized in that described step 5) sampling and outputting voltage method is wire access step-up/step-down circuit output point, sampled output current method is that series connection 0.1 ohm of sampling resistor enters step-up/step-down circuit output branch road, 0.1 ohm of sampling resistor both end voltage value of sampling.
9.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method according to claim 5, it is characterized in that the method that described step 6) catches the employing of secondary resonance coil resonance frequency again at 100kHz ~ 300kHz is: transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 10kHz from 100kHz continuous in 1.5ms, receiving terminal control unit is by secondary induction coil voltage magnitude in this 1.5ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, transmitting terminal control unit select magnitude of voltage maximum time respective frequencies f1, transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 1kHz from f1 continuous in 1ms, export every 0.1ms from f1 afterwards in 1ms continuously and reduce the pwm signal of 1kHz, receiving terminal control unit is by primary resonant coil voltage amplitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies f2, transmitting terminal control unit is at the pwm signal exporting every 0.1ms increase 0.1kHz from f2 continuous in 1ms, export every 0.1ms from f1 in lower 1ms continuously and reduce the pwm signal of 0.1kHz, receiving terminal control unit is by secondary induction coil voltage magnitude in this 2ms of secondary induction coil voltage sample module samples, by Wi-Fi module B and Wi-Fi module A communication, send secondary induction coil voltage magnitude to transmitting terminal control unit, select magnitude of voltage maximum time respective frequencies fm.
10.
magnetic coupling dual-mode wireless electric energy transmission regulate and control method according to claim 5, characterized by further comprising step 7) transmitting terminal control unit and system health information is sent to power carrier communication module, power carrier communication module is modulated signal, by wire transfer information, by the information that other devices of power carrier communication module demodulation transmit, and being stored in transmitting terminal control unit, the memory cycle is 5 minutes, empties a secondary data every 5 minutes; If it is operating state, pre-operation state, Low-power-consumptiodormancy dormancy state that client shows a certain magnetic coupling dual-mode wireless electric energy transmitting device transmitting terminal control unit state; then magnetic coupling dual-mode wireless electric energy transmitting device is working properly; if output abnormality or no-output, then need to carry out Inspection and maintenance to corresponding magnetic coupling dual-mode wireless electric energy transmitting device.
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