Since time constant and currents could be affected by inductance and resistance after coil combined transformation, a method of coils segmentation and transformation was used for the current-carrying coils. The response time of voltage loading, the output electromagnetic force and the acceleration of an electromechanical converter (EMC) were studied, respectively. Compared with single coils in series, the frequency of EMC with multiple coils in parallel could be about 500 Hz, both the length of coils and current are increased, the peak of output electromagnetic force of EMC is 276.4 N, which is over 16 times larger than that of single coils in series, and the acceleration is up to 27.64 g. Analysis results show that the proposed methods display the characteristics of high response and large thrust force.