Voltage stability control circuit of wireless power supply system

Abstract

The invention relates to a voltage stability control circuit of a wireless power supply system. The voltage stability control circuit is electrically connected with the output end of a wireless receiving end and comprises a filter circuit, a BUCK voltage reduction circuit and a BOOST voltage boosting circuit, the BUCK voltage reduction circuit and the BOOST voltage boosting circuit are connected in a series mode, and voltage stability control is conducted on the input voltage VIN by controlling the BUCK voltage reduction circuit to work in the through mode and controlling the BOOST voltage boosting circuit to work in the voltage boosting mode; or voltage stability control is conducted on the input voltage VIN by controlling the BUCK voltage reduction circuit to work in the voltage reduction mode and controlling the BOOST voltage boosting circuit to work in the through mode, meanwhile, a power supply circuit self-starting circuit is arranged, at the moment of powering up, the self-starting circuit is started and supplies power to a drive circuit, after the voltage value of an output end CY2 gets stabilized, the output end CY2 supplies power to the drive circuit, it is guaranteed that a stable power source is provided for the drive circuit, and stability of system operation is guaranteed.

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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