The utility model belongs to the technical field of electric driving, and provides a
motor controller, an electric driving device, an electric driving
system and
electric equipment.The
motor controller comprises two power modules, a
bus capacitor and a
direct current connecting piece, and the two power modules are arranged side by side in the first direction; each
power module is provided with a first input terminal and a second input terminal which are opposite in polarity, the
bus capacitor is located between the two power modules and provided with a first output terminal and a second output terminal, and the direct-current connecting piece is located between the two power modules and stacked with the
bus capacitor in the second direction. The
direct current connecting piece comprises a first
electrode piece and a second
electrode piece which are separated and stacked in the second direction, the first
electrode piece is electrically connected to the first output terminal and the first input terminals of the two power modules, and the second electrode piece is electrically connected to the second output terminal and the second input terminals of the two power modules. According to the
motor controller provided by the embodiment of the invention,
stray inductance is reduced, and the performance of the electric driving device is improved.