Magnetic resonance transmitting device, transmitting method and wireless charging system

The invention discloses a magnetic resonance transmitting device, a transmitting method and a wireless charging system. The magnetic resonance transmitting device comprises a feedback circuit, a gain circuit, a control circuit, a power supply circuit and a magnetic resonance oscillating circuit. When the total required power changes, the power supply circuit can adjust the total required power based on the product of the difference value between the adjusted feedback voltage and the reference voltage and the negative feedback gain or the product of the difference value between the adjusted feedback voltage and the reference voltage and the adjusted negative feedback gain. Or on the basis of the product of the difference value between the adjusted feedback voltage and the reference voltage and the adjusted negative feedback gain, the numerical value of the power supply voltage output by the power supply circuit is adjusted, so that the transmitting power of the magnetic resonance transmitting device is changed