Surge suppression circuit and method for wireless power transmission system

Abstract

The invention provides a surge suppression circuit and method of a wireless power transmission system. The surge suppression circuit comprises a secondary side resonant network, a rectifying circuit and a motor, a control circuit, a sampling circuit and an energy storage component are arranged between the rectifying circuit and the motor, the sampling circuit is arranged at the two ends of the energy storage component in parallel and used for sampling electrical signals of the energy storage component and outputting the electrical signals to the control circuit, the energy storage component and the motor are arranged in parallel, switches are arranged between the energy storage component and the motor and located on a connection branch path of the secondary side resonant network and the motor, and the switch is connected with the control circuit and is controlled by the control circuit to be switched on or off. A voltage feedback control circuit is led into a wireless power system secondary side circuit, voltage at the motor end is compensated in a charging and discharging mode through the energy storage component, the rotation blocking problem is solved, and normal operation of the motor is maintained.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a surge suppression circuit and method for a wireless power transmission system. Background technique [0002] For motor appliances in traditional home appliances, such as mixers, the load power varies during the working process. Taking mixer products as an example, the load power change is mainly reflected in two aspects. First, the instantaneous power of the mixer is relatively large when starting, and it is easy to generate a large current, and then gradually decreases and stabilizes at the rated power; It is not the same, the surge phenomenon is prone to occur in the circuit, that is, the instantaneous increase of the load power causes voltage or current fluctuations in the circuit, and the problems that can arise from this are: [0003] 1. Motor products generate instantaneous surge current, which damages the components in the circuit and has a negative impact on...

AI Technical Summary

Problems solved by technology

First, the instantaneous power of the mixer is relatively large when starting, and it is easy to generate a large current, and then gradually decreases and stabilizes at the rated power; It is not the same, the surge phenomenon is prone to occur in the circuit, that is, the instantaneous increase of the load power causes voltage or current fluctuations in the circuit, and the problems that can arise from this are:

[0003] 1. Motor products generate instantaneous surge current, which damages the components in the circuit and has a negative impact on the power grid;

[0004] 2. The demand for instantaneously increased power load will inevitably generate a large current in the motor, which will easily cause the motor to overheat and burn out if it works for a long time; motor damage;

When the electrical load power increases instantaneously or fluctuates greatly, the voltage at the motor terminal is not enough to maintain the normal rotation of the motor, resulting in a stall phenomenon and making the product unable to work normally

Images