Controller circuit for wireless power transfer system

Abstract

The invention discloses a controller circuit for a wireless power transmission system. The controller circuit comprises a circuit board, and a microprocessor module, two groups of current sampling modules, two groups of voltage sampling modules, a can communication module and a PWM module which are installed on the circuit board. The two groups of current sampling modules, the two groups of voltage sampling modules, a logic conversion circuit and the can communication module are connected with the microprocessor module through wiring of the circuit board. The two groups of current sampling modules are respectively connected to the logic conversion circuit through respective signal isolation circuits, the logic conversion circuit is connected to the PWM module, the PWM module is connected to an inverter circuit or a DC / DC converter, and the current sampling modules and the voltage sampling modules are connected to a primary side or a secondary side of the wireless power transmission system. Strong and weak electricity electrical isolation is realized, the influence of high-frequency noise in a main circuit on a detection signal is reduced, and the working performance is stable; thecontroller circuit is simple in circuit composition, is especially suitable for mass production, and has hardware and software dual protection effects on overcurrent and overvoltage.

Description

technical field [0001] The invention relates to a controller circuit for a wireless power transmission system in the field of power detection and control, in particular to a controller circuit for a wireless power transmission system. Background technique [0002] In recent years, wireless power transfer (WPT) technology for electric vehicles has received more and more attention. The wireless charging system does not contain leakage ports, does not require manual operation, does not occupy the space above the ground, and can realize charging in a static state and a moving state. Reduce the size of the electric vehicle battery pack and the mass of the vehicle to reduce energy consumption. [0003] The wireless power transfer system has a complex topology. In the application, the controller needs to provide a high-frequency PWM signal to the wireless power transfer system to drive the inverter circuit to generate a high-frequency AC voltage. At the same time, it is also nece...

AI Technical Summary

Problems solved by technology

[0004] In the existing controller circuit, the voltage-dropping resistor and capacitor are directly used to sample the power supply, and the resistor sampling signal is easily interfered by high-frequency noise in the main circuit, which will lead to low sampling accuracy and affect the accuracy of subsequent detection data. bring adverse effects

Moreover, the protection mechanism of the system is mainly software protection, and there is a problem that the protection is not timely, which affects the stable operation of the system.

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