Magnetic coupling resonant wireless electric energy transmission device based on low frequency PWM rectifier

A rectifier and resonant technology, which is applied in the field of magnetically coupled resonant wireless power transmission devices, can solve the problems of reducing the operating frequency of power switches, the amplitude of DC output voltage cannot be kept constant, and the uncertainty of wireless transmission distance.

CN104821667AActive Publication Date: 2015-08-05CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-08-05

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Abstract

The invention discloses a magnetic coupling resonant wireless electric energy transmission device based on a low frequency PWM rectifier. The device comprises a rectifier, a voltage stabilizing capacitor, an inverter power switch, an emission circuit resonant capacitor, an emission circuit resonant coil, an emission circuit current sampling resistor, a receiving circuit resonant coil, a receiving circuit current sampling resistor, a rectifier power switch, a resonant filter capacitor, a resonant filter inductor, a load resistor, a transmitting end signal conditioning circuit, a transmitting end analog to digital converter, a transmitting end microprocessor, a transmitting end high frequency inverter driving circuit, an induction voltage detection coil, a receiving end signal conditioning circuit, a receiving end analog to digital converter, a receiving end microprocessor and a PWM rectifier driving circuit. According to the device, the resonance of an emission loop is ensured, the tracking of transmitting end working frequency, the resonance of a receiving circuit and the constant output of load voltage are realized, the requirement of working frequency by a power switch device is greatly reduced, and a space is provided for the device to raise power supply working frequency.
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Description

technical field

[0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a magnetic coupling resonant wireless power transmission device, in particular to a magnetic coupling resonant wireless power transmission device based on a low-frequency PWM rectifier. Background technique

[0002] Wireless power transmission is a flexible and convenient power transmission method. It overcomes the problems of contact wear and easy generation of electric sparks in the traditional wire transmission method, and improves the safety and reliability of the system. At present, wireless power transmission is mainly divided into three types of technologies: radiation, electromagnetic induction and magnetic coupling resonance. Among them, magnetic coupling resonance wireless power transmission technology has obvious advantages when both transmission distance and transmission power need to be considered.

[0003] The ideal magnetic coupling ...

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Embodiment Construction

[0051] A magnetically coupled resonant wireless energy transmission device based on a low-frequency PWM rectifier proposed by the present invention, its embodiment is as follows figure 1 , figure 2 and image 3As shown, it includes a rectifier 1, a first voltage stabilizing capacitor 2, a second voltage stabilizing capacitor 3, a first inverter power switch 4, a second inverter power switch 5, a transmitting circuit resonant capacitor 6, and a transmitting circuit resonant coil 7, Transmitting circuit current sampling resistor 8, receiving circuit resonant coil 9, receiving circuit current sampling resistor 10, first rectifying power switch 11, second rectifying power switch 12, third stabilizing capacitor 13, fourth stabilizing capacitor 14, resonance filter Capacitor 15, resonant filter inductor 16, load resistor 17, signal conditioning circuit 18 at the transmitting end, analog-to-digital converter 19 at the transmitting end, microprocessor 20 at the transmitting end, hig...