IPT system primary power regulation method and system based on controllable inductance

Abstract

The invention provides an IPT system primary power regulation method and system based on controllable inductance. The power regulation method comprises the following steps that a voltage type IPT system is established, a primary resonance inductor comprises a coil of N turns, the Nth turn of the coil is connected with a coil control switch Kn in series, equivalent load impedance values and primary resonance inductor optimal values are preset in a controller, and the equivalent load impedances and the primary resonance inductance optimal values correspond to each other one by one; the controller works out the equivalent load impedance value and obtains the primary resonance inductance optimal value according to the corresponding relation between the equivalent load impedance values and the primary resonance inductance optimal values, and controls switching-on and switching-off of the coil control switch Kn, and therefore regulation of the primary resonance inductor is achieved. By the adoption of the IPT system primary power regulation method and system based on the controllable inductance, the number of the turns of the coil which is connected to a circuit is adjusted according to the load, and the primary resonance inductance and the effective area and the magnetic flow area which exist in the process of practical work of the primary coil are regulated according to the load; when the IPT system works at different loads, the IPT system can achieve the optimal system efficiency and electromagnetic radiation is reduced to the maximum extent.

Description

technical field [0001] The invention relates to a power regulation technology of an IPT (Inductively Power Transfer, inductive power transfer) system, in particular to a controllable inductance-based IPT system primary side power regulation method and system. Background technique [0002] IPT technology has created a new way of power access, and has attracted more and more attention from the academic community, and has become a research hotspot in the field of electrical engineering. The universal power supply platform of the IPT system with strong practicability is one of the important application directions at present. The general IPT system power supply platform has one energy emission mechanism (primary side) and multiple pick-up mechanisms (secondary side) and electrical equipment, where each pick-up mechanism is installed in the corresponding electrical equipment, and different electrical equipment has different power grade. When loads (electrical equipment) of diffe...

AI Technical Summary

Problems solved by technology

In this adjustment method, when the load power level of the IPT system changes in a wide range, the capacitor array on the primary side must be composed of a large number of capacitors, and each capacitor is connected to the control switch, which greatly increases the volume of the circuit

In addition, the IPT system works in high-frequency mode, and electromagnetic radiation is an important issue that must be considere

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