High-frequency inverter power supply of wireless power transmission device and frequency doubling control method for inverter power supply

Abstract

The invention discloses a high-frequency inverter power supply of a wireless power transmission device and a frequency doubling control method for the inverter power supply. An inverter frequency doubling circuit (2) consists of n sets of parallel inverter units (2'); a main controller (8) determines output power and output frequency according to the working conditions of a noncontact transformer (4) and a load (7), adjusts duty ratios of pulses and phases between the pulses and sends driving pulse signals; the n sets of inverter units (2') of the inverter frequency doubling circuit (2) are driven to act by a driving circuit (13) in a time division mode, so that the output voltage frequency or the current frequency of the inverter frequency doubling circuit (2) is n times those of the inverter units (2'), and adjustment of a 1 to n-times output frequency range is realized; and a primary resonant capacitor (5) and a secondary resonant capacitor (5') can be adjusted according to the output frequency of the inverter frequency doubling circuit (2) to keep efficient transmission, wherein n is an integer not less than 1.

Description

technical field [0001] The invention relates to a high-frequency inverter power supply for a wireless energy transmission device and a frequency multiplication control method thereof. Background technique [0002] At present, electrified transportation vehicles such as electric vehicles and urban rail transit are charged or powered by contact, especially urban rail transit, etc., are powered by mobile contact between catenary and pantograph. Sparks and friction are likely to cause carbon deposition due to poor contact Dust, low safety and reliability of power supply, serious pollution, heavy maintenance workload, and equipment service life are also affected. When encountering harsh environments such as rain and snow, contact power supply has obvious limitations. Wireless power supply technology can effectively solve the above problems. Its characteristics are: (1) No physical contact is required between the power supply and the load unit, electrical insulation, safety and re...

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