Control system for wireless power transfer system

A control system for a wireless power transfer (WPT) system, wherein the control system comprises a circuit board, and a microprocessor module, two sets of current sampling modules, two sets of voltage sampling modules, a controller area network (CAN) communication module, and a pulse-width modulation (PWM) module that are disposed on the circuit board;

• the two sets of current sampling modules, the two sets of voltage sampling modules, a logic conversion circuit, and the CAN communication module are all connected to the microprocessor module through a circuit board wiring;
• the two sets of current sampling modules are 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 of the WPT system or a secondary side of the WPT system;
• wherein the current sampling modules and the voltage sampling modules acquire a circuit current and a circuit voltage on the primary side or the secondary side from the WPT system, and transmit the circuit current and the circuit voltage on the primary side or the secondary side to the microprocessor module;
• the microprocessor module measures the circuit current and the circuit voltage on the primary side or the secondary side, and generates a chip select signal PWMEN;
• after a protection signal output by the current sampling modules is processed by the signal isolation circuit and the protection signal is input to the logic conversion circuit together with the chip select signal PWMEN, the logic conversion circuit outputs a PWM enable signal;
• the PWM enable signal is transmitted to the PWM module, and the PWM module determines, based on the PWM enable signal, whether to generate a PWM signal and transmit the PWM signal to the inverter circuit or the DC/DC converter to control a power supply or charging on the primary side or the secondary side;
• and the microprocessor module transmits the circuit current and the circuit voltage on the primary side or the secondary side to the CAN communication module, and the CAN communication module then transmits the circuit current and the circuit voltage on the primary side or the secondary side to a host computer for a display.