Multi-series high-power extremely-low-frequency transmitter

The invention provides a multi-series high-power extremely-low-frequency transmitter, and relates to the technical field of low-frequency signals, and the transmitter comprises a signal processing module which is used for generating multi-path low-frequency excitation signals and transmitting the multi-path low-frequency excitation signals to a plurality of transmitting modules; each transmitting module is used for converting a three-phase alternating-current power supply into a direct-current power supply with controllable output voltage, performing power amplification on the low-frequency excitation signal by using the direct-current power supply, and outputting first-stage transmitting power; performing multiple series connection on the output ports of the plurality of transmitting modules to complete synthesis of the plurality of first-stage transmitting powers, and outputting second-stage transmitting powers; the switching module is connected with the plurality of transmitting modules at the same time an