The invention discloses a main driving
system of a
hybrid power locomotive. The main driving
system comprises a main generator, a main
contactor, a rectifying module, a
power battery pack, an inverse module and a
traction motor, wherein the main generator is connected with the rectifying module through the main
contactor, and the rectifying module is connected with the inverse module; the inverse module comprises a
capacitor, a first module group, a second module group, a third module group and a fourth module group; each module group comprises two serial modules, and each module is composed of a
transistor and a
diode which are connected in parallel; the
capacitor, the first module group, the second module group, the third module group and the fourth module group are connected between the
anode and the
cathode of the rectifying module in parallel; the
traction motor is connected with the second module group, the third module group and the fourth module group in the inverse module; one end of the
power battery pack is connected with the
cathode of the rectifying module, and the other end of the
power battery pack is connected with an
inductor and a
current transformer in series and then is connected between the two modules of the first module group. The stability of the main driving
system of the locomotive is greatly improved, the power
battery pack is accurate and controllable in charging, and a
solid foundation is provided for the technological development and wide-range application of the
hybrid power locomotive.