Non-contact power supply primary circuit with current expanding function

Abstract

The invention relates to a non-contact power supply primary circuit with a current expanding function. The non-contact power supply primary circuit comprises an inverter and a primary coil, wherein a primary compensating circuit is connected between the inverter and the primary coil. The primary compensating circuit comprises a first inductor, a first capacitor and a second inductor, wherein one end of the first inductor is connected with the output anode end of the inverter, the other end of the first inductor is connected with one end of the first capacitor and a first end of the second inductor, a second end of the second inductor is connected with one end of the compensating circuit through the primary coil, and the other end of the compensating circuit is connected with the other end of the first capacitor and the output cathode end of the inverter. The compensating circuit compensates inductance in the primary coil, and a resonance circuit is formed between the compensating circuit and the primary coil to enable the first inductor, the first capacitor and the second inductor to form the circuit with the current expanding function. The non-contact power supply primary circuit with the current expanding function can achieve constant control of currents of primary cables, has the current expanding function and is wide in application range and safe and reliable.

Description

technical field [0001] The invention relates to a non-contact power supply compensation circuit, in particular to a non-contact power supply primary side circuit with current expansion function, belonging to the technical field of non-contact power supply. Background technique [0002] The contactless power transfer (Contectless Power Transfer, CPT) system is composed of two parts, the primary side and the secondary side. The side energy emitting part always works in the state of maximum excitation current. With the practical application of the equipment, it is faced with the change of the reflected impedance of the secondary side caused by the change of the load of the single-side pickup or multi-side pickup, which leads to the change of the primary-side loop current, so that the system cannot work normally under the rated conditions. [0003] The resonant conversion circuit on the primary side of the system realizes the conversion of high-frequency electric energy. In ord...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned method of realizing constant current control on the primary side is more complicated to control, which increases the cost and complexity of the system, and reduces the efficiency and reliability of the system.

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