Resonant tracking non-contact multi-channel power supply device and power supply method

Abstract

The invention discloses a resonance tracking type non-contact multi-channel power supply device and a power supply method. The output end of a switching power supply circuit is connected to a MOS half-bridge circuit group, and the MOS half-bridge circuit group is composed of a plurality of switch-controllable MOS half-bridge inverter circuits. Parallel connection; each group of MOS half-bridge inverter circuits is connected to a power transmission circuit, and each power transmission circuit is formed by a resonant capacitor and a power transmission coil in series to form a resonant circuit, and all power transmission circuits are coupled to the same power receiving coil; the power supply device also includes The frequency tuning circuit, the voltage regulating circuit and the power capacity regulating circuit respectively carry out the automatic regulation of the excitation frequency, the automatic regulation of the excitation voltage and the control and regulation of the power capacity. The power supply device of the present invention can automatically track the optimal resonance frequency point when the coupling parameters change, automatically adjust the excitation voltage according to the load change demand, overcome the single-group inverter power limitation, adjust the number of parallel circuits according to the power demand, improve the transmission efficiency, and reduce the energy consumption.

Description

technical field [0001] The invention belongs to the technical field of power supply / power electronics, and relates to a resonance tracking type non-contact multi-channel power supply device and a power supply method. Background technique [0002] As a new form of energy transmission, non-contact power supply has the characteristics of no contact, no wear, no spark, fully sealed, waterproof and explosion-proof, and is gradually being applied to rotating parts, machine joints, waterproof equipment, kitchen / Bathroom appliances, mobile / portable equipment and underground equipment and other fields. [0003] The existing non-contact power supply generally uses a magnetic material and a coil to form a loosely coupled transformer as an energy transmission channel. The excitation voltage is applied to the primary coil to excite an alternating magnetic field in space, and the magnetic field is used as an energy carrier to pass through the air gap from the secondary Coil coupling ind...

AI Technical Summary

Problems solved by technology

The load at the receiving end is required to be relatively constant, and at the same time, it increases the design difficulty and cost of the power supply circuit of the subsequent stage

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