A dynamic tuning device and tuning method for transmitting end of wireless power transmission equipment

Abstract

The invention discloses a device and method for dynamic tuning of a sending end of a wireless power transmission device. The device is composed of voltage sensors (US), a phase control inductance capacitance parallel circuit and a compensation capacitor (Cs), wherein the voltage sensors (US) are connected to the two input ends of an inverter (N) in the sending end of the wireless power transmission device in parallel, and the phase control inductance capacitance parallel circuit and the compensation capacitor (Cs) are connected between the inverter (N) and a current sensor (IS) of a sending coil (Ls) in sequence in series. According to the phase control inductance capacitance parallel circuit, an inductor (Lp) is connected with a bidirectional thyristor (Tx) in series and then connected with a capacitor (Cp) in parallel, and the control end of the bidirectional thyristor (Tx), the output end of the current sensor (IS) and the output end of the voltage sensor (US) are all connected with a sending end controller (KS). By the adoption of the device and method for dynamic tuning of the sending end of the wireless power transmission device, the output end of a buck-boost direct current-direct current converter (BB) keeps operating at the minimum voltage effective value; namely, a sensing end circuit is closer to the complete resonance state, so that the active power of the sending end is improved, and therefore the transmission power and the efficiency of the wireless power transmission device are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, in particular to a dynamic tuning device and a tuning method thereof in inductive coupling wireless power transmission equipment. Background technique [0002] Wireless power transmission technology is a new kind of power transmission and technology. It is widely used, especially in some special occasions, such as drilling, industrial and mining, underwater detection and so on. Moreover, wireless power transmission technology is a technical field with great potential and has very important application value, which has attracted the close attention of many domestic and foreign scholars and industrial circles. [0003] Compared with other wireless power transmission technologies, the inductively coupled wireless power transmission method can easily transmit power at high power in a short distance, and has a good development and application prospect. The transmission device consi...

AI Technical Summary

Problems solved by technology

[0007] However, most of the existing tuning devices at the sending end are based on impedance measurement to change the number of switching capacitors for dynamic compensation to realize the tuning of the leakage inductance of the sending end coil of the wireless energy transmission system; however, due to factors such as changes in the leakage inductance of the sending end coil It is difficult to measure in real time and accurately, so that the parameters of the wireless energy transfer system change, which in turn leads to changes in the resonance frequency between the sending end and the receiving end. power and efficiency

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