A method for output control of wireless charging system based on Lönberg disturbance observer
A disturbance observer and wireless charging technology, applied in electric vehicle charging technology, control/regulation system, output power conversion device, etc., can solve the problems of complex modeling structure and difficult control design, and achieve simplified structure and stable Output voltage, the effect of improving reliability
Active Publication Date: 2022-05-31
QUANZHOU INST OF EQUIP MFG
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Problems solved by technology
Among them, PID control mainly depends on engineering experience. When the system dynamic characteristics change due to changes in system frequency, load and other parameters, the PID parameters need to be readjusted; H ∞ The modeling structure of the control and μ comprehensive control methods is complex, and the compromise between robust stability and performance indicators cannot be dealt with under a unified framework at the same time, so the control design is more difficult; Disadvantages of high frequency chattering
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[0034] The present invention needs to use such as figure 2 A wireless charging system with an LCL-S topology is shown, including a DC power supply E, an inverter circuit, a resonant circuit, a rectifier circuit, a filter circuit and a load R L ;
[0035] One end of the inverter circuit is connected to the DC power supply E, and the other end is connected to the resonant circuit; one end of the rectifier circuit is connected to the resonant circuit, and the other end is connected to the filter circuit, and the load R L Connect with filter circuit;
[0036] The inverter circuit includes a switch tube S 1 , switch tube S 2 , switch tube S 3 and switch tube S 4 ; The resonant circuit includes an inductance L 1 , capacitance C 1 , Transmitting coil L P , compensation capacitor C P , receiving coil L S and the compensation capacitor C S ; The rectifier circuit includes a diode D 1 , Diode D 2 , Diode D 3 and the diode D 4 ; The filter circuit includes an inductor L ...
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The present invention provides an output control method of a wireless charging system based on a Lomberg disturbance observer in the technical field of wireless charging, comprising the following steps: step S10, controlling the output voltage of an inverter circuit using a phase-shifting full-bridge control technology; step S20 1. Observing the disturbance of the internal current control loop and the external voltage control loop of the wireless charging system through the Lomberg disturbance observer; step S30, updating the phase angle of the inverter circuit offset based on the observed disturbance, and the The output voltage is controlled, and then the output voltage of the wireless charging system is controlled. The advantage of the present invention is that the reliability of the wireless charging system is greatly improved.
Description
technical field [0001] The invention relates to the technical field of wireless charging, in particular to an output control method of a wireless charging system based on a Lomberg disturbance observer. Background technique [0002] When the wireless charging system supplies power to the load, as the working environment changes and the load changes, the output voltage and power of the system will fluctuate, which will affect the stability of the load operation and even cause certain damage to the load. For example, when the system charges a lithium battery, if the charging voltage is too high, it will cause damage to the battery components and seriously reduce its service life. Therefore, it is necessary to control the stability of the output voltage of the wireless charging system. [0003] Traditionally, there are some nonlinear control algorithms, such as PID control, H ∞ control, μ integrated control and sliding mode voltage control. These control algorithms can contr...
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IPC IPC(8): H02J50/12H02J7/00H02M1/088H02M3/335H02M7/5387
CPCH02J50/12H02J7/00711H02J7/00712H02M1/088H02M3/3353H02M7/53871H02J2207/20H02M1/0025Y02T90/14
Inventor 黄东晓刘辉柯栋梁仇逸侯隽于新红汪凤翔
Owner QUANZHOU INST OF EQUIP MFG