PID control method in radiative wireless power transfer system
A technology of wireless energy transmission and control method, which is applied in the direction of electric controllers, controllers with specific characteristics, electrical components, etc., can solve the problems of low precision and inability to accurately control the transmission power of the transmitting end, and achieve the effect of eliminating interference
Active Publication Date: 2019-03-01
UNIV OF SCI & TECH OF CHINA
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[0007] In the process of energy transmission between the transmitting end and the receiving end in the electromagnetic radiation wireless energy transfer system, the transmitting end needs to control the transmitting power according to the control error packet returned by the receiving end. However, the existing PID control method has low precision and cannot be accurate. Control the transmit power of the transmitter
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[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0041] In the radiative wireless energy transfer system, the transmitting end has a fixed energy power supply, and the receiving end has no fixed energy power supply. It needs to rely on collecting the energy emitted by the transmitting end for power supply. The transmitting end and the receiving end need to interact through wireless communication to initiate, establish and End the charging connection. In the radiative wireless power transfer syste...
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The invention discloses a PID control method in a radiant wireless power transmission system. The PID control method comprises steps as follows: a transmitting terminal judges whether a received control error packet is a zero value or not; if not, expected transmitting power is calculated according to the control error packet and current actual transmitting power; a cyclic iteration PID control mode is adopted, wherein the ith cyclic iteration process is as follows: the transmitting terminal calculates a proportional, integral and differential control item according to a difference value between the expected transmitting power and the current actual transmitting power to obtain a new PID control coefficient; a new control input value is calculated according to the new PID control coefficient; and the new control input value is transmitted to a transmitting power controller, so that the transmitting power controller obtains new actual transmitting power. By the method, real-time control can be carried out on the transmitting power and amplitude limiting control can be carried out on an integral item and the control coefficient to ensure overshoot; and the interference is also eliminated to a certain extent.
Description
technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a PID control method in a radiative wireless power transmission system. Background technique [0002] Wireless power transfer (wireless power transfer, WPT) refers to a method of energy transmission from the power source to the load without direct electrical contact. According to different transmission mechanisms, wireless energy transmission can be mainly divided into electromagnetic induction, magnetic field resonance, and radiation. Among them, the radiation type can be divided into radio wave mode, microwave mode, laser mode and ultrasonic mode. [0003] In the 21st century, human beings are faced with the major challenge of achieving sustainable economic and social development, and environmental and energy issues have increasingly become one of the prominent issues in the world. How to effectively utilize existing energy sources has aroused extensive at...
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IPC IPC(8): H02J50/15H02J50/20G05B11/42
CPCG05B11/42H02J7/025
Inventor 杨坚谢金森蔡委哲吴晓民邓理淙
Owner UNIV OF SCI & TECH OF CHINA