Ocean electromagnetic detection transmitting device and control method

The invention provides an ocean electromagnetic detection transmitting device and a control method. The device comprises a rectifier and an inversion H bridge output circuit in sequential connection, wherein the rectifier comprises an LC filter circuit and a current type rectifier bridge; and the inversion H bridge output circuit comprises a transmitting bridge and a transmitting electrode. The transmitting device also comprises a control device, wherein the control device comprises a sine wave and synchronizing signal generating circuit, a DSP data processing circuit and a multi-PWM signal generating circuit. In the invention, the overall topology structure is a BUCK circuit topology structure, thus the small-voltage large-current transmitting target of the ocean electromagnetic transmitting device is easier to realize in an environment with relatively small ocean resistance. By adopting the PWM generation technology combining indirect SVPWM and phase shift technology, a step wave can be synthesized using mu