CN108054839B - Electric energy control method and device of non-contact power supply system - Google Patents
Electric energy control method and device of non-contact power supply system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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Abstract
The embodiment of the invention provides an electric energy control method and device of a non-contact power supply system, wherein the method comprises the following steps: the method and the system can improve the efficiency of electric energy control, have simple and convenient implementation mode and improve the working reliability of the non-contact power supply system.
Description
Technical Field
The embodiment of the invention relates to the technical field of power supply, in particular to an electric energy control method and device of a non-contact power supply system.
Background
The existing non-contact power supply system mainly has two implementation modes for controlling the transmission power. One of the methods is as follows: the output power of the ground inverter power supply is controlled to be relatively constant and does not change along with the load. In this way, the control and implementation of the ground inverter are relatively easy, but the overall system efficiency is low because the output power cannot be changed with the load. FIG. 5 is a schematic diagram of a non-contact power supply system in the prior art, as shown in FIG. 5, regardless of the load current I0How to change, the output current Ip of the inverter keeps constant, the system control is simple, the realization difficulty is small, however, the output electric energy is difficult to be reasonably utilized, and the system efficiency is low.
The other mode is as follows: and detecting the load power requirement in real time, feeding back the load power requirement to the ground inverter power supply through a wireless channel, and adjusting the output power in time to meet the load requirement. The system has high efficiency, can control the electric energy output according to the requirement, but the realization of the system is more complex, and the reliability and the time delay of a wireless channel can have important influence on the stability of the whole system. Fig. 6 is a schematic structural diagram of another non-contact power supply system in the prior art, as shown in fig. 6, the power requirement of the load is detected in real time, and is fed back to the ground inverter through a wireless channel, and the output power is adjusted in time to meet the load requirement. The method has high system efficiency, can control the electric energy output according to the requirement, but needs to feed back the load power requirement to the inverter at the transmitting end through a wireless channel to be used as the target of inverter control so as to finish the regulation of the load power. That is, current implementations require closed loop control to achieve regulation of the load power. The delay and availability of the wireless channel under closed-loop control may adversely affect the stability of the whole system, and a more complex control strategy is usually required to improve the stability of the system, and the implementation of the whole system is also complex.
Therefore, how to provide a power control method of a non-contact power supply system with high efficiency and simple implementation is a problem to be solved urgently.
Disclosure of Invention
To solve the problems in the prior art, embodiments of the present invention provide a method and an apparatus for controlling electric energy of a non-contact power supply system.
In a first aspect, an embodiment of the present invention provides a method for controlling electric energy of a non-contact power supply system, where the method includes:
detecting an output voltage of an inverter of a non-contact power supply system and an output current of the inverter;
obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system;
and controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
In a second aspect, an embodiment of the present invention provides an electric energy control apparatus for a non-contact power supply system, where the apparatus includes:
the detection module is used for detecting the output voltage of an inverter of a non-contact power supply system and the output current of the inverter;
the load power module is used for obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system;
and the control module is used for controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
In a third aspect, an embodiment of the present invention provides an electronic device, where the device includes a memory and a processor, where the processor and the memory complete communication with each other through a bus; the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the power control method of the non-contact power supply system.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the power control method of the above-described non-contact power supply system.
According to the electric energy control method and device of the non-contact power supply system, the output voltage of the inverter of the non-contact power supply system and the output current of the inverter are detected, the power of the load of the power supply system is obtained according to the output voltage, the output current and the system parameters of the power supply system, the power of the load is used as the regulation target of the inverter to control the output electric energy of the power supply system, the power required by the load at the current moment can be accurately estimated, the transmitted electric energy is controlled according to the power required by the load, the efficiency of electric energy control is improved, the method and the system do not need a wireless communication channel to form feedback, the implementation mode is simple and convenient, and the working reliability of the non-contact power supply system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of an electric energy control method of a non-contact power supply system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric energy control device of a non-contact power supply system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a non-contact power supply system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a non-contact power supply system in the prior art;
fig. 6 is a schematic structural diagram of another non-contact power supply system in the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of an electric energy control method of a non-contact power supply system according to an embodiment of the present invention, and as shown in fig. 1, the method includes:
step 11, obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system;
and step 12, controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
Fig. 4 is a schematic structural diagram of a non-contact power supply system according to an embodiment of the present invention, and as shown in fig. 4, the power supply system includes: a launch end and a pick-up end, the launch end comprising: inverter, compensation arrangement and the transmission guide rail of transmitting terminal, the pick-up end includes: the device comprises a pickup device, a compensation device at a pickup end, a high-frequency rectifier and a power regulator. Wherein the launching guide rail and the pick-up device form a coupling magnetic circuit. The launching guide rail and the pick-up device are coupled through a magnetic field without mechanical contact. The effect of the pick-up end on the launch end can be described by the reflected impedance.
The server can detect the output voltage of the inverter at the transmitting end of the power supply system and the output current of the inverter, wherein the output voltage can be recorded as UsThe output current can be recorded as Ip. The server may then determine the output voltage UsThe output current IpAnd the non-contact power supply model is used for obtaining the power of the load of the power supply system, taking the power of the load as the target of the inverter control, and controlling the output electric energy of the power supply system so as to complete the regulation of the power of the load.
According to the electric energy control method of the non-contact power supply system, the output voltage of the inverter of the non-contact power supply system and the output current of the inverter are detected, the power of the load of the power supply system is obtained according to the output voltage, the output current and the system parameters of the power supply system, the power of the load is used as the regulation target of the inverter to control the output electric energy of the power supply system, the power required by the load at the current moment can be accurately estimated, the transmitted electric energy is controlled according to the power required by the load, the efficiency of electric energy control is improved, the method does not need a wireless communication channel to form feedback, a closed-loop control effect is obtained through open-loop control, the implementation mode is simple and convenient, and the working reliability of the non-contact power supply system is improved.
Optionally, on the basis of the foregoing embodiment, the system parameters include:
the equivalent resistance of a transmitting guide rail of the power supply system, the angular frequency of the power supply system, the mutual inductance of a coupling magnetic circuit of the power supply system and the duty ratio of a power regulator of the power supply system;
correspondingly, the obtaining of the load power of the non-contact power supply system according to the output voltage, the output current and the system parameters of the power supply system includes:
obtaining the reflection impedance of the pick-up end of the power supply system to the transmitting end according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail;
obtaining the current of the load and the resistance of the load according to the reflected impedance, the output current, the mutual inductance, the angular frequency and the duty ratio;
and obtaining the power of the load according to the current of the load and the resistance of the load.
Specifically, after the server detects the output voltage and the output current of the inverter, the equivalent resistance of the transmitting rail of the power supply system, the angular frequency of the power supply system, the mutual inductance of the coupling magnetic circuit of the power supply system, and the duty ratio of the power regulator of the power supply system may be obtained from a database, and the server may further obtain the capacitance of the compensating device at the transmitting end of the power supply system and the inductance of the transmitting rail of the power supply system from the database. As shown in fig. 4, the capacitance of the compensation device at the transmitting end can be denoted as CpThe inductance of the transmission rail can be recorded as LpThe equivalent resistance of the emitting guide rail can be recorded as RpThe angular frequency of the power supply system may be denoted as w, the mutual inductance may be denoted as M, and the duty cycle may be denoted as D.
Then, the server may calculate a reflected impedance of the pick-up end of the power supply system to the transmitting end according to formula one, where the reflected impedance may be denoted as Zr。
Us＝Ip·(w·Lp-1/(w·Cp))+Ip·Rp+Ip·Zr(formula one)
Because, under normal conditions, the power supply system operates in a resonance state in which: w.Lp-1/(w·Cp) The formula one can be simplified to formula two as 0.
Us＝Ip·Rp+Ip·Zr(formula two)
The server can output the voltage U according to the formula IIsThe output current IpAnd the equivalent resistance R of the emitting guide railpObtaining the reflected impedance Zr。
The server may then determine the reflected impedance ZrThe output current IpObtaining the current of the load and the resistance of the load by the mutual inductance M, the angular frequency w and the duty ratio D; wherein the current of the load can be recorded as I0The resistance of the load can be noted as R0。
Then, the server may obtain the power of the load according to formula three, and the power of the load may be denoted as P0。
P0＝I2 0·R0(formula three)
According to the electric energy control method of the non-contact power supply system, provided by the embodiment of the invention, the reflected impedance of the pick-up end of the power supply system to the transmitting end is obtained according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail of the power supply system, the current of the load and the resistance of the load are obtained according to the reflected impedance, the output current, the mutual inductance of the power supply system, the angular frequency of the power supply system and the duty ratio of the power supply system, the power of the load is obtained according to the current of the load and the resistance of the load, the power requirement of the load can be accurately estimated, and the method is more scientific.
Optionally, on the basis of the foregoing embodiment, obtaining the current of the load and the resistance of the load according to the reflected impedance, the output current, the mutual inductance, the angular frequency, and the duty cycle includes:
obtaining an alternating current equivalent resistance of the pickup end according to the reflection impedance, the angular frequency and the mutual inductance;
obtaining the resistance of the load according to the alternating current equivalent resistance;
obtaining a reflected impedance voltage according to the reflected impedance and the output current;
and obtaining the current of the load according to the reflected impedance voltage, the angular frequency, the mutual inductance and the duty ratio.
In particular, the server obtains the reflected impedance ZrAnd then, according to the reflection impedance, the obtained angular frequency w and the obtained mutual inductance M, and according to a formula four, obtaining the alternating current equivalent resistance of the pickup end. Wherein, the AC equivalent resistance can be recorded as Rac。
Rac＝(w2·M2)/Zr(formula four)
The server obtains the equivalent alternating current resistance RacThen, the resistance R of the load can be obtained according to the formula five0。
R0＝(π·Rac) /8 (formula five)
The server may determine the reflected impedance Z according to equation sixrAnd the output current IpObtaining a reflected impedance voltage, wherein the reflected impedance voltage can be recorded as Ur。
Ur＝Ip·Zr(formula six)
The server obtains the reflected impedance voltage UrThen, the voltage U can be obtained according to the reflected impedancerThe angular frequency w, the mutual inductance M and the duty ratio D to obtain the current I of the load0。
According to the electric energy control method of the non-contact power supply system, the alternating current equivalent resistance of the pickup end is obtained according to the reflection impedance, the angular frequency and the mutual inductance, the resistance of the load is obtained according to the alternating current equivalent resistance, the reflection impedance voltage is obtained according to the reflection impedance and the output current, and the current of the load is obtained according to the reflection impedance voltage, the angular frequency, the mutual inductance and the duty ratio, so that the method is more scientific.
Optionally, on the basis of the foregoing embodiment, obtaining the current of the load according to the reflected impedance voltage, the angular frequency, the mutual inductance, and the duty cycle includes:
obtaining the current of the pickup end according to the reflected impedance voltage, the angular frequency and the mutual inductance;
and obtaining the current of the load according to the current of the pickup end and the duty ratio.
Specifically, the server obtains the reflected impedance voltage UrThen, the voltage U can be obtained according to the reflected impedancerAnd the angular frequency w and the mutual inductance M obtain the current of the pickup end according to a formula seven. Wherein, the current of the pick-up end can be recorded as I2。
I2＝UrV (w.M) (formula seven)
The server obtains the current I of the pickup end2Then, the current I of the load can be obtained according to the formula eight0。
According to the electric energy control method of the non-contact power supply system, the current of the pickup end is obtained according to the reflected impedance voltage, the angular frequency and the mutual inductance, and the current of the load is obtained according to the current and the duty ratio of the pickup end, so that the method is more scientific.
Fig. 2 is a schematic structural diagram of an electric energy control device of a non-contact power supply system according to an embodiment of the present invention, and as shown in fig. 2, the device includes: a detection module 20, a load power module 21, and a control module 22, wherein:
the detection module 20 is used for detecting the output voltage of an inverter of the non-contact power supply system and the output current of the inverter; the load power module 21 is configured to obtain power of a load of the power supply system according to the output voltage, the output current, and a system parameter of the power supply system; the control module 22 is configured to control the output power of the power supply system by using the power of the load as a regulation target of the inverter.
An embodiment of the present invention provides an electric energy control apparatus for a non-contact power supply system, where the apparatus may include: a detection module 20, a load power module 21 and a control module 22. The detection module 20 can detect the output voltage U of the inverter of the contactless power supply systemsAnd the output current I of the inverterp. The load power module 21 may be based on the output voltage UsThe output current IpAnd a non-contact power supply model for obtaining the power of the load of the power supply system. The control module 22 may control the output power of the power supply system by using the power of the load as a regulation target of the inverter, so as to complete the regulation of the power of the load.
The functions of the electric energy control device of the non-contact power supply system provided by the embodiment of the present invention refer to the above method embodiments specifically, and are not described herein again.
According to the electric energy control device of the non-contact power supply system, the output voltage of the inverter of the non-contact power supply system and the output current of the inverter are detected, the power of the load of the power supply system is obtained according to the output voltage, the output current and the system parameters of the power supply system, the power of the load is used as the regulation target of the inverter to control the output electric energy of the power supply system, the power required by the load at the current moment can be accurately estimated, the transmitted electric energy is controlled according to the power required by the load, the efficiency of electric energy control is improved, the device does not need a wireless communication channel to form feedback, a closed-loop control effect is obtained through open-loop control, the implementation mode is simple and convenient, and the working reliability of the non-contact power supply system is improved.
Optionally, on the basis of the foregoing embodiment, the load power module includes: obtaining a submodule, a reflection impedance submodule, a load parameter submodule and a load power submodule, wherein:
the obtaining submodule is used for obtaining system parameters of the power supply system, and the system parameters comprise: the equivalent resistance of a transmitting guide rail of the power supply system, the angular frequency of the power supply system, the mutual inductance of a coupling magnetic circuit of the power supply system and the duty ratio of a power regulator of the power supply system; the reflection impedance submodule is used for obtaining the reflection impedance of the pick-up end of the power supply system to the transmitting end according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail; the load parameter submodule is used for obtaining the current of the load and the resistance of the load according to the reflection impedance, the output current, the mutual inductance, the angular frequency and the duty ratio; and the load power sub-module is used for obtaining the power of the load according to the current of the load and the resistance of the load.
Specifically, the load power module described in the above embodiment may include: the device comprises an acquisition submodule, a reflection impedance submodule, a load parameter submodule and a load power submodule.
The detection module detects the output voltage U of the invertersAnd an output current IpThen, the obtaining sub-module can obtain the equivalent resistance R of the transmitting guide rail of the non-contact power supply system from the databasepThe angular frequency w of the power supply system, the mutual inductance M of the coupling magnetic circuit of the power supply system and the duty ratio D of the power regulator of the power supply system. The obtaining submodule can also obtain the capacitance C of the compensation device of the transmitting end of the power supply systempInductance L of the transmission guide rail of the power supply systemp。
Then, the reflected impedance sub-module may calculate a reflected impedance of the pick-up end of the power supply system to the transmitting end according to a formula one, where the reflected impedance may be denoted as Zr。
Us＝Ip·(w·Lp-1/(w·Cp))+Ip·Rp+Ip·Zr(formula one)
Because, under normal conditions, the power supply system operates in a resonance state in which: w.Lp-1/(w·Cp) The formula one can be simplified to formula two as 0.
Us＝Ip·Rp+Ip·Zr(formula two)
The reflecting impedance submodule can output the voltage U according to the formula IIsThe output current IpAnd the equivalent resistance R of the emitting guide railpObtaining the reflected impedance Zr。
The load parameter submodule may then determine the reflected impedance ZrThe output current IpThe mutual inductance M, the angular frequency w and the duty ratio D to obtain the current I of the load0And a resistance R of said load0。
Then, the load power sub-module may obtain the power P of the load according to a formula three0。
P0＝I2 0·R0(formula three)
The electric energy control device of the non-contact power supply system provided by the embodiment of the invention obtains the inductance of the transmitting guide rail of the non-contact power supply system, the equivalent resistance of the transmitting guide rail, the angular frequency of the power supply system, the mutual inductance of the coupling magnetic circuit of the power supply system and the duty ratio of the power regulator of the power supply system, obtaining the reflection impedance of the pick-up end of the power supply system to the transmitting end according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail, obtaining a current of the load and a resistance of the load according to the reflected impedance, the output current, the mutual inductance, the angular frequency and the duty cycle, the power of the load is obtained according to the current of the load and the resistance of the load, and the power requirement of the load can be accurately estimated, so that the device is more scientific.
Optionally, on the basis of the foregoing embodiment, the load parameter sub-module includes: alternating current equivalent resistance unit, load resistance unit, reflection impedance voltage unit and load current unit, wherein:
the alternating current equivalent resistance unit is used for obtaining the alternating current equivalent resistance of the pickup end according to the reflection impedance, the angular frequency and the mutual inductance; the load resistance unit is used for obtaining the resistance of the load according to the alternating current equivalent resistance; the reflecting impedance voltage unit is used for obtaining reflecting impedance voltage according to the reflecting impedance and the output current; the load current unit is used for obtaining the current of the load according to the reflected impedance voltage, the angular frequency, the mutual inductance and the duty ratio.
Specifically, the load parameter sub-module described in the above embodiment may include: the device comprises an alternating current equivalent resistance unit, a load resistance unit, a reflection impedance voltage unit and a load current unit.
The reflection impedance submodule obtains the reflection impedance ZrThen, the ac equivalent resistance unit may obtain the ac equivalent resistance of the pickup end according to the fourth formula, based on the reflected impedance, the obtained angular frequency w, and the obtained mutual inductance M. Wherein, the AC equivalent resistance can be recorded as Rac。
Rac＝(w2·M2)/Zr(formula four)
The alternating current equivalent resistance unit obtains the alternating current equivalent resistance RacThen, the load resistance unit may obtain the resistance R of the load according to the formula five0。
R0＝(π·Rac) /8 (formula five)
The reflected impedance voltage unit can be according to the formula six, the reflected impedance ZrAnd the output current IpObtaining a reflected impedance voltage, wherein the reflected impedance voltage can be recorded as Ur。
Ur＝Ip·Zr(formula six)
The reflecting impedance voltage unit obtains the reflecting impedance voltage UrThe load current unit may then be based on the reflected impedance voltage UrThe angular frequency w, the mutual inductance M and the duty ratio D to obtain the current I of the load0。
According to the electric energy control device of the non-contact power supply system, the alternating current equivalent resistance of the pickup end is obtained according to the reflection impedance, the angular frequency and the mutual inductance, the resistance of the load is obtained according to the alternating current equivalent resistance, the reflection impedance voltage is obtained according to the reflection impedance and the output current, and the current of the load is obtained according to the reflection impedance voltage, the angular frequency, the mutual inductance and the duty ratio, so that the device is more scientific.
Optionally, on the basis of the foregoing embodiment, the load current unit includes: a pickup terminal current sub-unit and a load current sub-unit, wherein:
the pickup end current subunit is used for obtaining the current of the pickup end according to the reflected impedance voltage, the angular frequency and the mutual inductance; and the load current subunit is used for obtaining the current of the load according to the current of the pickup end and the duty ratio.
Specifically, the load current unit described in the above embodiments may include: a pickup terminal current sub-unit and a load current sub-unit.
Reflected impedance voltage U obtained by reflecting impedance voltage unitrThen, the pickup terminal current subunit may be based on the reflected impedance voltage UrThe angular frequency w and the mutual inductance M are obtained according to a formula seven to obtain the current I of the pickup end2。
I2＝UrV (w.M) (formula seven)
The current subunit of the pickup end obtains the current I of the pickup end2Then, the load current subunit may obtain the current I of the load according to the formula eight0。
According to the electric energy control device of the non-contact power supply system, the current of the pickup end is obtained according to the reflection impedance voltage, the angular frequency and the mutual inductance, and the current of the load is obtained according to the current of the pickup end and the duty ratio, so that the device is more scientific.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, the electronic device includes: a processor (processor)31, a memory (memory)32, and a bus 33, wherein:
the processor 31 and the memory 32 complete communication with each other through the bus 33; the processor 31 is configured to call program instructions in the memory 32 to perform the methods provided by the above-mentioned method embodiments, for example, including: detecting an output voltage of an inverter of a non-contact power supply system and an output current of the inverter; obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system; and controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: detecting an output voltage of an inverter of a non-contact power supply system and an output current of the inverter; obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system; and controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: detecting an output voltage of an inverter of a non-contact power supply system and an output current of the inverter; obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system; and controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter.
The above-described embodiments of the electronic device and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An electric energy control method of a non-contact power supply system, characterized by comprising:
detecting an output voltage of an inverter of a non-contact power supply system and an output current of the inverter;
obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system;
controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter;
wherein the system parameters include:
the equivalent resistance of a transmitting guide rail of the power supply system, the angular frequency of the power supply system, the mutual inductance of a coupling magnetic circuit of the power supply system and the duty ratio of a power regulator of the power supply system;
correspondingly, the obtaining of the load power of the non-contact power supply system according to the output voltage, the output current and the system parameters of the power supply system includes:
obtaining the reflection impedance of the pick-up end of the power supply system to the transmitting end according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail;
obtaining the current of the load and the resistance of the load according to the reflected impedance, the output current, the mutual inductance, the angular frequency and the duty ratio;
and obtaining the power of the load according to the current of the load and the resistance of the load.
2. The method of claim 1, wherein said deriving the current of the load and the resistance of the load from the reflected impedance, the output current, the mutual inductance, the angular frequency, and the duty cycle comprises:
obtaining an alternating current equivalent resistance of the pickup end according to the reflection impedance, the angular frequency and the mutual inductance;
obtaining the resistance of the load according to the alternating current equivalent resistance;
obtaining a reflected impedance voltage according to the reflected impedance and the output current;
and obtaining the current of the load according to the reflected impedance voltage, the angular frequency, the mutual inductance and the duty ratio.
3. The method of claim 2, wherein said deriving the current of the load from the reflected impedance voltage, the angular frequency, the mutual inductance, and the duty cycle comprises:
obtaining the current of the pickup end according to the reflected impedance voltage, the angular frequency and the mutual inductance;
and obtaining the current of the load according to the current of the pickup end and the duty ratio.
4. An electric power control device of a non-contact power supply system, characterized by comprising:
the detection module is used for detecting the output voltage of an inverter of a non-contact power supply system and the output current of the inverter;
the load power module is used for obtaining the power of a load of the power supply system according to the output voltage, the output current and system parameters of the power supply system;
the control module is used for controlling the output electric energy of the power supply system by taking the power of the load as a regulation target of the inverter;
wherein the load power module includes:
the obtaining submodule is used for obtaining system parameters of the power supply system, and the system parameters comprise: the equivalent resistance of a transmitting guide rail of the power supply system, the angular frequency of the power supply system, the mutual inductance of a coupling magnetic circuit of the power supply system and the duty ratio of a power regulator of the power supply system;
the reflection impedance submodule is used for obtaining the reflection impedance of the pick-up end of the power supply system to the transmitting end according to the output voltage, the output current and the equivalent resistance of the transmitting guide rail;
the load parameter submodule is used for obtaining the current of the load and the resistance of the load according to the reflection impedance, the output current, the mutual inductance, the angular frequency and the duty ratio;
and the load power sub-module is used for obtaining the power of the load according to the current of the load and the resistance of the load.
5. The apparatus of claim 4, wherein the load parameter submodule comprises:
the alternating current equivalent resistance unit is used for obtaining the alternating current equivalent resistance of the pickup end according to the reflection impedance, the angular frequency and the mutual inductance;
the load resistance unit is used for obtaining the resistance of the load according to the alternating current equivalent resistance;
the reflecting impedance voltage unit is used for obtaining reflecting impedance voltage according to the reflecting impedance and the output current;
and the load current unit is used for obtaining the current of the load according to the reflected impedance voltage, the angular frequency, the mutual inductance and the duty ratio.
6. The apparatus of claim 5, wherein the load current unit comprises:
a pickup end current subunit, configured to obtain a current of the pickup end according to the reflected impedance voltage, the angular frequency, and the mutual inductance;
and the load current subunit is used for obtaining the current of the load according to the current of the pickup end and the duty ratio.
7. An electronic device, comprising a memory and a processor, wherein the processor and the memory communicate with each other via a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 3.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 3.
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