A transcranial magnetic stimulation instrument power supply structure and control method for varying a direct current bus voltage

Abstract

The application discloses a transcranial magnetic stimulation instrument power supply structure and control method of variable direct-current bus voltage, and belongs to the field of medical instrument power supply. The power supply structure comprises a totem pole power factor correction circuit, a series-parallel resonant circuit, a minimum direct-current bus voltage calculation unit and a control unit, and the totem pole power factor correction circuit comprises a direct-current bus capacitor; the series-parallel resonant circuit is used for charging a load capacitor after boosting the voltage on the direct-current bus capacitor; and the control unit is used for taking the minimum direct-current bus voltage calculated by the minimum direct-current bus voltage calculation unit as the given voltage of the totem pole power factor correction circuit, so that the direct-current bus capacitor generates the minimum direct-current bus voltage. The application can significantly improve the input side current waveform quality and charging efficiency, and can change the direct-current bus voltage value according to the stimulation intensity and repetition frequency requirement of the load, so as to improve the input current waveform quality, power supply efficiency, power density and power supply utilization rate and the like.

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