A voltage stabilization control circuit for a wireless power supply system

Abstract

The invention relates to a voltage stabilization control circuit of a wireless power supply system, which is electrically connected to an output terminal of a wireless receiving end, and includes a filter circuit, a BUCK step-down circuit and a BOOST step-up circuit, and the BUCK step-down circuit and the BOOST step-up circuit are connected in series , by controlling the BUCK step-down circuit to work in the direct mode and controlling the BOOST step-up circuit to work in the step-up mode, the input voltage VIN is stabilized and controlled; or the BUCK step-down circuit is controlled to work in the step-down mode and the BOOST step-up circuit is controlled It works in the direct mode and controls the voltage regulation of the input voltage VIN. At the same time, it is equipped with a self-starting circuit of the power supply circuit. 2 After the voltage value stabilizes, the output terminal CY 2 Provide power for the drive circuit, ensure a stable power supply for the drive circuit, and ensure the stability of the system operation.

Description

technical field [0001] The invention relates to a voltage stabilizing circuit, in particular to a voltage stabilizing control circuit of a wireless power supply system. Background technique [0002] Wireless power transmission technology transmits energy through high-frequency alternating electromagnetic fields. When the parameters of the system change, or the power and position of the load change, the energy picked up by the receiving end from the transmitting end will change. Generally speaking, the electrical equipment side hopes to obtain a stable power output, so the output voltage stabilization of the receiving end is one of the necessary conditions for the stable operation of the wireless power transmission system. [0003] The currently used wireless power transmission mainly adopts the method of communication between the transmitting end and the receiving end, and adjusts the voltage of the receiving end by adjusting the operating frequency, duty cycle or phase of t...

AI Technical Summary

Problems solved by technology

However, when the input voltage of the above circuit topology is higher or lower than the output voltage, it is necessary to sample the output voltage through the BUCK circuit controller and BOOST circuit controller, and control the BUCK circuit and BOOST circuit to switch. Due to the switching delay, When the input voltage changes relatively quickly, the output voltage is prone to instability at the moment of switching, which increases the complexity of the system control

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